4.7 Article

Enhanced electromagnetic wave absorption, thermal conductivity and flame retardancy of BCN@LDH/EP for advanced electronic packing materials

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Chemistry, Multidisciplinary

Reticular Design of Precise Linker Installation into a Zirconium Metal-Organic Framework to Reinforce Hydrolytic Stability

Yongwei Chen et al.

Summary: In this study, a Zr-based MOF, NU-600, was used to demonstrate the construction of multi-component MOFs with unprecedented complexity and control by inserting two linear linkers with different lengths into distinct pockets. It was found that increasing the connectivity of Zr6 nodes remarkably reinforced the hydrolytic stability of these linker-inserted MOFs while maintaining their water uptake capacity and pore-filling pressure. Additionally, introducing hydrophilic -OH groups into the linkers effectively shifted the pore-filling step to lower partial pressures. This methodology provides a powerful strategy to enhance the structural stability of other MOF frameworks and promotes advancements in fundamental sciences and practical applications.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2023)

Article Chemistry, Physical

Boosted electromagnetic wave absorption performance from synergistic induced polarization of SiCNWS@MnO2@PPy heterostructures

Meng Zhang et al.

Summary: In the past decade, there has been increasing attention on electromagnetic pollution. Developing low-cost, lightweight, simple preparation, and high electromagnetic attenuation efficient absorbing materials has become a feasible solution to this problem. In this study, core-shell SiCNws@MnO2@PPy nanocomposites were successfully prepared and exhibited excellent electromagnetic wave absorption performance, making them a promising material for absorbing electromagnetic waves.

NANO RESEARCH (2023)

Article Engineering, Environmental

Hollow LDH cage covering with ultra-thin MXenes veil: Integrated micro-nano structure upon heat release suppression and toxic effluents elimination for polymer

Haobo Zhou et al.

Summary: In this study, a strongly-coupled micro-nano structure based on hollow LDH with ultra-thin MXenes veil (MX@H-LDH) was designed via assembly strategy. Loading 5.0 wt% MX@H-LDH reduced peak heat release rate, total heat release, peak CO production rate and total CO production by 54.6%, 37.5%, 47.4%, and 63.6% respectively. The mechanical interlocking action of MX@H-LDH strengthened the mechanical capability and the curbed toxic gas releases were observed. This work is instructive for the design of novel MXenes-based nanostructures in polymer composites with high performance.

CHEMICAL ENGINEERING JOURNAL (2023)

Article Chemistry, Physical

Facile synthesis of nitrogen-doped porous Ni@C nanocomposites with excellent synergistically enhanced microwave absorption and thermal conductive performances

Lingling Ma et al.

Summary: Nitrogen-doped porous Ni@C microwave absorbers with excellent microwave absorption and thermal management capabilities were successfully fabricated using a facile Liquid-Solid-Solid method. The outstanding performance of these absorbers can be attributed to the special 3D nitrogen-doped porous Ni@C hybrid hierarchical architecture, which promotes the formation of a three-dimensional transmission network and provides multiple pathways of electromagnetic loss to enhance microwave absorption. The synthesis of these absorbers provides a new idea for low-cost development of high-performance absorbing materials.

CARBON (2023)

Article Chemistry, Physical

Amorphous carbon engineering of hierarchical carbonaceous nanocomposites toward boosted dielectric polarization for electromagnetic wave absorption

Qingfu Ban et al.

Summary: Graphitic carbon materials often have poor impedance matching and unsatisfactory electromagnetic wave absorption. Engineered amorphous carbon is developed to produce hierarchical carbonaceous nanocomposites, aiming to enhance dielectric polarization and improve electromagnetic wave absorption. The hierarchical structure can be regulated to reduce polarization relaxation loss and conductive loss, and multiple reflections and scatterings contribute to increased absorption capability.

CARBON (2023)

Article Chemistry, Multidisciplinary

Enhancing the Low/Middle-Frequency Electromagnetic Wave Absorption of Metal Sulfides through F- Regulation Engineering

Jiaolong Liu et al.

Summary: This study demonstrates a new fluoride ion regulation strategy for achieving broad-spectrum low/mid-frequency electromagnetic wave attenuation by synergistically manipulating multiple factors. The concentration and introduction method of fluoride ions were found to be significant in improving electromagnetic wave absorption performance.

ADVANCED FUNCTIONAL MATERIALS (2022)

Article Chemistry, Multidisciplinary

Initiating VB-Group Laminated NbS2 Electromagnetic Wave Absorber toward Superior Absorption Bandwidth as Large as 6.48 GHz through Phase Engineering Modulation

Huibin Zhang et al.

Summary: VB-Group NbS2 nanosheets prepared through a facile one-step solvothermal method exhibit remarkable electromagnetic wave absorption performance, showing tunable absorbing frequency bands (C-, X-, and Ku-bands) and the ability to adjust performance by changing material contents.

ADVANCED FUNCTIONAL MATERIALS (2022)

Article Chemistry, Physical

Optimal particle distribution induced interfacial polarization in bouquet-like hierarchical composites for electromagnetic wave absorption

Zehao Zhao et al.

Summary: The study designed a model dielectric material with a carbon-based supported structure and demonstrated that under optimal conditions, nanoparticles supported on carbon substrate can lead to optimal forms of interfacial polarization, enhancing dielectric loss and improving electromagnetic wave absorption properties.

CARBON (2022)

Article Engineering, Environmental

Luteolin-based epoxy resin with exceptional heat resistance, mechanical and flame retardant properties

Tian-Yu Gao et al.

Summary: This study synthesized a bio-based epoxy monomer DGEL via a one-step method, and prepared a biocompatible epoxy resin DGEL/DDS with outstanding thermal, mechanical, and flame retardant properties.

CHEMICAL ENGINEERING JOURNAL (2022)

Article Chemistry, Multidisciplinary

Hierarchical Ti3C2Tx MXene/Carbon Nanotubes Hollow Microsphere with Confined Magnetic Nanospheres for Broadband Microwave Absorption

Chang Zhang et al.

Summary: The hierarchical MXene-based hollow microsphere design strategy shows great potential for high-efficiency microwave absorption performance, with excellent interfacial polarization and magnetic loss effects, as well as optimized impedance matching and conduction loss.
Article Nanoscience & Nanotechnology

Hierarchically Multifunctional Polyimide Composite Films with Strongly Enhanced Thermal Conductivity

Yongqiang Guo et al.

Summary: A hierarchically multifunctional polyimide composite film with high thermal conductivity and electromagnetic interference (EMI) shielding has been successfully fabricated through hierarchical design and assembly strategy.

NANO-MICRO LETTERS (2022)

Article Chemistry, Multidisciplinary

Heterointerface Engineering of Hierarchically Assembling Layered Double Hydroxides on Cobalt Selenide as Efficient Trifunctional Electrocatalysts for Water Splitting and Zinc-Air Battery

Junnan Song et al.

Summary: Engineering of structure and composition is crucial for modulating the electrocatalytic activity. In this study, hybrid nanostructured arrays (HNA) with branched and aligned structures were synthesized by hydrothermal-selenization-hybridization strategy. The resulting branched CoSe2@CoNi LDH HNA exhibits enhanced electrocatalytic performance towards oxygen evolution/reduction and hydrogen evolution reaction. The construction of heterostructure effectively lowers the reaction barrier and improves electrical conductivity, favoring the enhanced electrochemical performance. This work provides new guidance for the development of multifunctional electrocatalysts.

ADVANCED SCIENCE (2022)

Article Nanoscience & Nanotechnology

N-doped MXene derived from chitosan for the highly effective electrochemical properties as supercapacitor

Liuyue Pu et al.

Summary: A new type of N-doped MXene nanomaterial was prepared from non-toxic biological chitosan and MXene as a potential electrode for supercapacitors, showing high specific capacitance and excellent stability after 10,000 charge and discharge cycles. This was attributed to the lone pair of electrons of the N atom and increased interlayer distance in the N-doped MXene.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2022)

Article Nanoscience & Nanotechnology

Thermal degradation kinetics of epoxy resin modified with elastomeric nanoparticles

Mohammad Hossein Karami et al.

Summary: The research demonstrates that adding elastomeric nanoparticles to epoxy resin can increase the thermal degradation temperature and enhance the thermal stability of the nanocomposites. Various thermal degradation kinetic models were used to explain the thermal degradation process of the nanocomposites, showing that epoxy resin with 0.5 wt.% elastomeric nanoparticles exhibits a similar kinetic mechanism to the 1 wt.% nanocomposites.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2022)

Article Nanoscience & Nanotechnology

Ice template method assists in obtaining carbonized cellulose/boron nitride aerogel with 3D spatial network structure to enhance the thermal conductivity and flame retardancy of epoxy-based composites

Duo Pan et al.

Summary: A novel epoxy-based composite with significantly enhanced thermal conductivity and good flame retardancy properties was successfully fabricated by constructing a 3D carbonized cellulose/boric acid boron nitride aerogel network and infiltrating it with an epoxy matrix. This composite material shows great potential as next-generation thermal dissipating material for electronic devices.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2022)

Article Nanoscience & Nanotechnology

A core-shell-structured APP@COFs hybrid for enhanced flame retardancy and mechanical property of epoxy resin (EP)

Xue Bi et al.

Summary: This study presents a modified ammonium polyphosphate (APP) by using Schiff base covalent organic frameworks (COFs) as a surface modifier, addressing the issues of moisture sensitivity and poor interfacial compatibility with epoxy resin (EP). The addition of modified APP effectively enhances the flame retardancy of EP and improves the mechanical properties of the resulting composites.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2022)

Article Chemistry, Multidisciplinary

High-Quality Ferromagnet Fe3GeTe2 for High-Efficiency Electromagnetic Wave Absorption and Shielding with Wideband Radar Cross Section Reduction

Guanghao Li et al.

Summary: A high-quality Fe3GeTe2 single crystal with good electrical and magnetic properties has been prepared by solid-phase sintering and recrystallization method, and it shows potential for electromagnetic wave absorption and shielding.

ACS NANO (2022)

Article Chemistry, Multidisciplinary

Tailoring Self-Polarization of Bimetallic Organic Frameworks with Multiple Polar Units Toward High-Performance Consecutive Multi-Band Electromagnetic Wave Absorption at Gigahertz

Junye Cheng et al.

Summary: This study demonstrates the use of bi-metallic organic frameworks as electromagnetic wave absorbers, achieving broad frequency band and strong absorption capabilities. The rational selection of materials and structure manipulation enhance the performance of electromagnetic wave absorption. This work opens up new possibilities for the development of broadband and strong electromagnetic wave absorbers.

ADVANCED FUNCTIONAL MATERIALS (2022)

Article Engineering, Environmental

Tunable defects and interfaces of hierarchical dandelion-like NiCo2O4 via Ostwald ripening process for high-efficiency electromagnetic wave absorption

Liang Chai et al.

Summary: The micromorphology of absorbent materials significantly impacts microwave absorption performance, and using hierarchically structured HDNCO can improve impedance matching and absorption performance. The Ostwald ripening process alters the structure and morphology of HDNCO, leading to enhanced absorption properties. This study provides important guidance for the structural design of high-performance microwave absorbers.

CHEMICAL ENGINEERING JOURNAL (2022)

Article Engineering, Environmental

MOFs-derived self-sacrificing template strategy to double-shelled metal oxides nanocages as hierarchical interfacial catalyst for suppressing smoke and toxic gases releases of epoxy resin

Junling Wang et al.

Summary: The use of metal oxides double-shelled nanocages derived from metal organic frameworks (MOFs) has been shown to effectively suppress the emission of smoke and toxic gases from epoxy resin. In addition, the nanocages also improve the mechanical performance of the material.

CHEMICAL ENGINEERING JOURNAL (2022)

Article Engineering, Multidisciplinary

Flame retardancy and chemical degradation of epoxy containing phenylphosphonate group under mild conditions

Chao Ma et al.

Summary: The development of recycling methods for thermosetting resin is challenging due to their structure. In this study, a phenylphosphonate based epoxy monomer was prepared to regulate the flame retardancy and chemical degradation behavior of epoxy. The results showed that the introduction of phenylphosphonate into epoxy could improve its flame retardant and recyclable properties.

COMPOSITES PART B-ENGINEERING (2022)

Article Engineering, Chemical

Significant Improvement in the Flame Retardancy and Thermal Conductivity of the Epoxy Resin via Constructing a Branched Flame Retardant Based on SI-ATRP Initiated by Dopamine-Modified Boron Nitride

Liu Yang et al.

Summary: By grafting a flame retardant on the surface of exfoliated boron nitride nanosheets, this study achieved excellent thermal conductivity and flame retardancy of composites, promoting heat conduction path formation and reducing interfacial thermal resistance, resulting in enhanced thermal conductivity and superior flame retardant performance.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2022)

Article Chemistry, Physical

Cu/NC@Co/NC composites derived from core-shell Cu-MOF@Co-MOF and their electromagnetic wave absorption properties

Huanhuan Zhu et al.

Summary: Metal-organic-frameworks (MOFs) derived Cu/nitrogen doped carbon @Co/nitrogen doped carbon (Cu/NC@Co/NC) composites with core-shell structure and bimetallic composition were synthesized and exhibited outstanding electromagnetic wave absorption properties due to optimized impedance matching and strong attenuation ability.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2022)

Article Materials Science, Multidisciplinary

Enhanced flame-retardant and mechanical properties of epoxy resin by combination with layered double hydroxide, Mg2B2O5 whisker, and dodecyl dihydrogen phosphate

Ping Li et al.

Summary: In this study, a composite particle with layered double hydroxide (LDH) was deposited onto the surface of Mg2B2O5 whisker (MBW) using a co-precipitation method. Dodecyl dihydrogen phosphate (DDP) was then grafted onto the LDH-coated MBW to synthesize an inorganic-organic hybrid (MBW@LDH-DDP). The MBW@LDH-DDP was incorporated into epoxy resin (EP) to fabricate a composite, and it exhibited excellent curing behavior, fire properties, and mechanical properties. The results suggest that the incorporation of MBW@LDH-DDP can improve the fire safety and mechanical properties of EP, providing a novel strategy for designing multifunctional flame retardants.

MATERIALS & DESIGN (2022)

Article Chemistry, Physical

MoS2 wrapped MOF-derived N-doped carbon nanocomposite with wideband electromagnetic wave absorption

Juhua Luo et al.

Summary: This study developed a novel nitrogen doped carbon (NDC)/MoS2 composite with wide bandwidth, strong absorption, and light weight. By adjusting the mass ratio of NDC to MoS2, the optimized EMWA performance can be achieved. These findings provide new design ideas for the future development of high-performance and wideband EMWA materials.

NANO RESEARCH (2022)

Article Multidisciplinary Sciences

Hygroscopic holey graphene aerogel fibers enable highly efficient moisture capture, heat allocation and microwave absorption

Yinglai Hou et al.

Summary: In this study, hygroscopic holey graphene aerogel fibers (LiCl@HGAFs) with integrated functionalities of highly efficient moisture capture, heat allocation, and microwave absorption were reported. The fibers achieved a water sorption capacity over 4.15 g g(-1), and could be regenerated through both photo-thermal and electro-thermal approaches. Additionally, LiCl@HGAFs exhibited efficient heat transfer and broad microwave absorption performance.

NATURE COMMUNICATIONS (2022)

Article Nanoscience & Nanotechnology

Vertically Aligned Silicon Carbide Nanowires/ Boron Nitride Cellulose Aerogel Networks Enhanced Thermal Conductivity and Electromagnetic Absorbing of Epoxy Composites

Duo Pan et al.

Summary: A cellulose aerogel with highly enhanced thermal conductivity was successfully obtained by constructing a vertically aligned silicon carbide nanowires/boron nitride network. The composite exhibited significantly increased thermal conductivity compared to pure epoxy, both in vertical and horizontal directions. Additionally, it showed good electrical insulation and excellent electromagnetic wave absorption performance.

NANO-MICRO LETTERS (2022)

Article Nanoscience & Nanotechnology

Constructing nickel chain/MXene networks in melamine foam towards phase change materials for thermal energy management and absorption-dominated electromagnetic interference shielding

Haoran Cheng et al.

Summary: Phase change materials (PCMs) are ideal for thermal management in miniaturized and integrated electronic devices. However, developing PCMs with efficient thermal management and electromagnetic interference (EMI) shielding has remained a challenge. In this study, a continuous thermal/conductive network was built on a melamine foam template using magnetized nickel (Ni)/MXene (NiM) through dip-coating, and then polyethylene glycol (PEG) was encapsulated into porous NiM/MF hybrid sponge via vacuum impregnation method. The resulting NiM/PCM exhibited suitable thermal conductivity, high electrical conductivity, excellent EMI shielding effectiveness, as well as outstanding thermal stability and high latent heat storage capabilities.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2022)

Article Nanoscience & Nanotechnology

Short carbon fiber reinforced epoxy-ionic liquid electrolyte enabled structural battery via vacuum bagging process

Guang-He Dong et al.

Summary: In this study, a carbon fiber-based structural battery with load-bearing and energy storage functions was successfully fabricated. By employing a unique electrolyte and matrix material, the battery achieved high performance while being compatible with conventional manufacturing processes. The battery exhibited high tensile strength, energy density, and capacity recovery after loading.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2022)

Review Nanoscience & Nanotechnology

A comprehensive review on the thermal, electrical, and mechanical properties of graphene-based multi-functional epoxy composites

Amr Osman et al.

Summary: This review discusses the application of graphene in epoxy composites. It provides insights into the methods of graphene production, explains the thermal and electrical conduction mechanisms of graphene and its polymer composites, and reviews the recent progress of graphene in regulating the thermal, electrical, and mechanical properties of epoxies.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2022)

Article Chemistry, Physical

Synchronously improved thermal conductivity and dielectric constant for epoxy composites by introducing functionalized silicon carbide nanoparticles and boron nitride microspheres

Lihua Zhao et al.

Summary: This research successfully prepares a dielectric thermally conductive composite with high thermal conductivity and superb dielectric properties by incorporating microscale boron nitride microspheres and nanoscale silicon dioxide coated silicon carbide nanoparticles. By capitalizing on the merits of different particles, favorable thermal conductivity and dielectric constant are achieved without compromising the dielectric loss.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2022)

Article Engineering, Environmental

High performance epoxy resin with efficient electromagnetic wave absorption and heat dissipation properties for electron packaging by modification of 3D MDCF@hBN

Yongxin Qian et al.

Summary: This study reports a promising candidate, 3D MDCF@hBN filled epoxy resin, which has high thermal conductivity and electromagnetic wave absorbing capacity. It shows potential practical applications in high-power integrated circuits.

CHEMICAL ENGINEERING JOURNAL (2022)

Article Nanoscience & Nanotechnology

Effects of stitch yarns on interlaminar shear behavior of three-dimensional stitched carbon fiber epoxy composites at room temperature and high temperature

Yan Sun et al.

Summary: The effects of four types of stitch yarns on the interlaminar shear strength and failure behavior of 3D stitched composites were investigated at room temperature and 100 degrees C. The study found that the mechanical properties of the stitch yarns play a dominant role in determining the interlaminar shear strength at room temperature, with PBO stitch yarns showing the best performance. At 100 degrees C, the stitch yarns/resin interface performance becomes the decisive factor, with CF stitch yarns showing the best interlaminar shear performance. The use of stitching significantly improves the interlaminar shear strength at 100 degrees C, and silk fiber has the advantage of replacing carbon fiber at room temperature while maintaining mechanical properties.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2022)

Article Nanoscience & Nanotechnology

Benzyl(4-fluorophenyl)phenylphosphine oxide-modified epoxy resin with improved flame retardancy and dielectric properties

Haodong Duan et al.

Summary: A fluorine-containing diphenylphosphine oxide derivative was synthesized and used to improve the flame retardancy and dielectric properties of epoxy resin. The modified epoxy resin showed enhanced flame retardancy, lower heat release rate, and reduced dielectric loss, suggesting its potential for advanced electronic materials.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2022)

Article Nanoscience & Nanotechnology

Iron/silicon carbide composites with tunable high-frequency magnetic and dielectric properties for potential electromagnetic wave absorption

Tong Gao et al.

Summary: In this study, core/shell structural Fe/SiC composites with tunable ratios were synthesized using a heat-assisted surface adhesion process, and the optimized microwave absorption performance was achieved.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2022)

Article Nanoscience & Nanotechnology

Overview of MXene and conducting polymer matrix composites for electromagnetic wave absorption

Bo Dai et al.

Summary: With the development of wireless communication technology, electromagnetic pollution has become a pressing issue, demanding the development of efficient electromagnetic wave absorbing materials. This article examines the structure and performance of MXene and CPs, reviewing the current research progress and absorption mechanism.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2022)

Article Chemistry, Multidisciplinary

Superelastic, Highly Conductive, Superhydrophobic, and Powerful Electromagnetic Shielding Hybrid Aerogels Built from Orthogonal Graphene and Boron Nitride Nanoribbons

Lei Feng et al.

Summary: This study presents a strategy for fabricating highly thermally and electrically conductive aerogels using a hybrid carbon/ceramic structure made of hexagonal boron nitride nanoribbons and orthogonally structured graphene. The resulting hybrid aerogel exhibits high thermal and electrical conductivity, wide temperature-invariant superelasticity, low-voltage-driven Joule heating, strong hydrophobicity, and powerful broadband electromagnetic interference shielding effectiveness.

ACS NANO (2022)

Article Engineering, Environmental

Renewable biomass resources to access halogen- and phosphorus-free flame retardant thermosets with ultra-low heat release capacity

Yin Lu et al.

Summary: A novel bio-based bisbenzoxazine thermosetting resin has been successfully synthesized and characterized. The resin exhibits high thermal stability and extremely low flammability, making it a promising material for various applications.

CHEMICAL ENGINEERING JOURNAL (2022)

Article Chemistry, Multidisciplinary

Multifunctional Epoxy-Based Electronic Packaging Material MDCF@LDH/EP for Electromagnetic Wave Absorption, Thermal Management, and Flame Retardancy

Yongxin Qian et al.

Summary: This study demonstrates a multifunctional epoxy-based composite with high electromagnetic wave absorption, thermal conductivity, and flame retardancy. The synergistic effect of a porous structure and heterointerface promotes low reflection loss and wide absorption bandwidth. Moreover, the composite exhibits enhanced thermal conductivity due to the presence of continuous three-dimensional melamine-derived carbon foams. Additionally, the material shows high thermal stability and flame retardancy.
Article Nanoscience & Nanotechnology

Glucose-Assisted Exfoliation of Hexagonal Boron Nitride Nanosheets and Modification with Hyperbranched Polymers for Thermally Conductive Epoxy Composites: Implications for Thermal Management

Mingzhe Yang et al.

Summary: This study successfully obtained hydroxylated BNNS (BNNS-OH) using a glucose-assisted ball milling combined with a cosolvent ultrasonication method, and grafted end carboxylated hyperbranched polymer (CHBP) onto BNNS to achieve high thermal conductivity in EP resin. The BNNS-CHBP/EP composites showed excellent thermal stability and low dielectric loss, highlighting the potential for BN application in electronic packaging underfill materials.

ACS APPLIED NANO MATERIALS (2022)

Article Nanoscience & Nanotechnology

Frontal ring-opening metathesis polymerized polydicyclopentadiene carbon nanotube/graphene aerogel composites with enhanced electromagnetic interference shielding

Ping Wang et al.

Summary: In order to solve the problem of electromagnetic radiation and interference, researchers improved the electromagnetic interference shielding effectiveness of polymer nanocomposites by preparing three-dimensional lightweight porous carbon nanotube/graphene nanosheet aerogels. These aerogels not only solve the aggregation problem of nanomaterials, but also serve as channels for electronic transmission to attenuate electromagnetic waves.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2022)

Article Nanoscience & Nanotechnology

The weakly negative permittivity with low-frequency-dispersion behavior in percolative carbon nanotubes/epoxy nanocomposites at radio-frequency range

Mingxiang Liu et al.

Summary: This study investigates the frequency dispersion mechanism of negative permittivity in carbon nanotubes (CNTs)/epoxy composites. The Debye model is used to describe the dielectric relaxation when the CNT content is below the percolation threshold, while the Drude model explains the negative permittivity resulting from the plasma oscillation of free electrons in CNT networks above the percolation threshold. A novel Debye-Drude model is proposed to explain the low-frequency dispersion and weakly negative permittivity observed when the CNT content is slightly higher than the percolation threshold.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2022)

Article Nanoscience & Nanotechnology

Adjustable core-sheath architecture of polyaniline-decorated hollow carbon nanofiber nanocomposites with negative permittivity for superb electromagnetic interference shielding

Xiaojiang Xu et al.

Summary: This work presents a novel approach to develop hollow carbon nanofibers/polyaniline (HCNFs/PANI) nanocomposites with adjustable core-sheath architecture, negative permittivity, and outstanding electromagnetic interference (EMI) shielding performance. The effect of polyaniline sheath thickness on the electrical property and EMI performance of HCNFs/PANI nanocomposites is studied in detail. Results show that the HCNFs/PANI nanocomposites with a HCNFs loading of 50 wt% exhibit the highest electrical conductivity and the largest EMI shielding effectiveness within the X-band range. The excellent electrical conductivity, changeable dielectric resonance, and internal multiple scattering at interfaces contribute to the unique EMI shielding performance of HCNFs/PANI nanocomposites.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2022)

Article Nanoscience & Nanotechnology

Self-healing and polymer welding of soft and stiff epoxy thermosets via silanolates

Amelia A. Putnam-Neeb et al.

Summary: Incorporating dynamic bonds into polymers creates a new class of materials, covalent adaptable networks (CANs), which combine the reprocessability of thermoplastics with the bulk properties of fully crosslinked networks. These materials can be tuned for thermal and mechanical properties and have self-healing capabilities, making them sustainable alternatives to traditional thermosets.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2022)

Article Chemistry, Physical

Boosted electromagnetic wave absorption performance from synergistic induced polarization of SiCNWs@MnO2@PPy heterostructures

Meng Zhang et al.

Summary: In the past decade, electromagnetic pollution has gained considerable attention. Developing low-cost, lightweight, easy-to-prepare, and highly efficient electromagnetic wave absorbing materials has become a feasible solution. In this study, SiCNWs@MnO2@PPy nanocomposite was successfully prepared and showed excellent electromagnetic wave absorption performances.

NANO RESEARCH (2022)

Article Nanoscience & Nanotechnology

Superior wear resistance of epoxy composite with highly dispersed graphene spheres

Hongyan Xia et al.

Summary: By incorporating carbon spheres and graphene into epoxy composites, the thermal and wear properties of the composites can be improved, even at low graphene content. Through chemical functionalization of graphene by grafting epoxy chains, the total performance of the composites, especially the wear resistance, was significantly enhanced, with a reduction of wear rate by 95% at 20 wt.% E-g-AM compared to pure cured epoxy resin.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2022)

Article Nanoscience & Nanotechnology

Study on broadband microwave absorbing performance of gradient porous structure

Feng Luo et al.

Summary: The newly designed gradient porous structure for microwave absorbing material showed improved broadband performance with reduced reflection of electromagnetic waves and enhanced attenuation capability. This study provides a new design strategy for antiradar detection technique and shielding electromagnetic interference.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2021)

Article Nanoscience & Nanotechnology

Thermally conductive glass fiber reinforced epoxy composites with intrinsic self-healing capability

Fang Chen et al.

Summary: The study developed a thermally conductive and self-healing glass fiber cloth reinforced epoxy composite by functionalizing hexagonal boron nitride with a natural substance, showing improved thermal conductivity and mechanical strength; the composite exhibited excellent thermal conductivities at 35.0 wt% h-BN content and achieved interlaminar crack healing and thermal conductivities recovery through a reversible reaction; the resulting composite also demonstrated controlled degradability and recyclability.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2021)

Article Nanoscience & Nanotechnology

Aluminum dihydric tripolyphosphate/polypyrrole-functionalized graphene oxide waterborne epoxy composite coatings for impermeability and corrosion protection performance of metals

Qingsong Zhu et al.

Summary: The synthesis of ADTP-GO-PPy hybrids and their application in waterborne epoxy coatings can significantly enhance the dispersion ability, leading to improved corrosion resistance of mild steel.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2021)

Article Nanoscience & Nanotechnology

MOF-derived porous hollow Ni/C composites with optimized impedance matching as lightweight microwave absorption materials

Nannan Wu et al.

Summary: This study successfully fabricated Ni/C composites with excellent microwave absorption performance. The porous hollow Ni/C microspheres obtained at different calcination temperatures showed different microwave absorption effects, providing guidance for the research of lightweight microwave absorption materials.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2021)

Article Engineering, Environmental

Synthesize and introduce bio-based aromatic s-triazine in epoxy resin: Enabling extremely high thermal stability, mechanical properties, and flame retardancy to achieve high-performance sustainable polymers

Yu Qi et al.

Summary: A method was proposed to synthesize an aromatic s-triazine derivative from biomass feedstock, which can be employed to construct a bio-based epoxy precursor with high performance. The resulting cured epoxy presented remarkable properties, including high glass transition temperature, flexural modulus, and strength, as well as excellent intrinsic flame retardancy, surpassing commercial petroleum-based epoxy resin.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Engineering, Environmental

Thermal stable honokiol-derived epoxy resin with reinforced thermal conductivity, dielectric properties and flame resistance

Jingjing Meng et al.

Summary: Novel polymers based on naturally available honokiol were fabricated to produce renewable and functional epoxy resins, showing excellent thermal stability, conductivity, high specific heat, dielectric properties, and low flammability. The high-performing networks have great potential applications in the electronics and microelectronics industry.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Nanoscience & Nanotechnology

Lightweight Fe3C@Fe/C nanocomposites derived from wasted cornstalks with high-efficiency microwave absorption and ultrathin thickness

Guangyu Qi et al.

Summary: Carbon materials have great potential in producing microwave absorbers, with Fe3C@Fe/C composites obtained from wasted cornstalks showing excellent absorption capabilities. The credit for this lies in the impedance matching and attenuation properties of the composites, as well as the synergistic influence of dielectric and magnetic losses in the porous microstructure. A low-cost method using agricultural waste is proposed to reduce pollution caused by burning cornstalks.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2021)

Article Chemistry, Multidisciplinary

Simultaneous Manipulation of Interfacial and Defects Polarization toward Zn/Co Phase and Ion Hybrids for Electromagnetic Wave Absorption

Zhenguo Gao et al.

Summary: A new thermodynamic and kinetic cocontrol strategy was proposed to construct Zn/Co bimetal hybrid materials with tuning ion and phase hybridization, exhibiting excellent electromagnetic properties and electromagnetic wave absorption capabilities. Through the assistance of chelating agent and pyrolysis process under gradient temperature, the HMs at 700 degrees Celsius showed ultrahigh EM parameters and absorption ability.

ADVANCED FUNCTIONAL MATERIALS (2021)

Article Engineering, Environmental

A facile crosslinking strategy endows the traditional additive flame retardant with enormous flame retardancy improvement

Xiaoliang Peng et al.

Summary: This study improved the performance of traditional additive flame retardants using a simple crosslinking strategy, successfully enhancing the flame-retardant properties of epoxy resin composites and improving their thermal stability and dynamic mechanical properties.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Nanoscience & Nanotechnology

Synthesis and nonlinear optical properties of vanadium-doped plasticized epoxy polymer composites

A. S. Kulagina et al.

Summary: The study shows that vanadium-doped plasticized epoxy polymer composites exhibit a broad absorbance band at a wavelength of 950 nm, making them suitable for use as passive Q-switches in laser systems.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2021)

Article Nanoscience & Nanotechnology

Preparation and performance of fumed silica-stabilized epoxy resin pickering emulsion for basalt fiber-sizing agents

Zhongwu Chen et al.

Summary: This study utilized fumed silica modified by trace amounts of CTAC to stabilize epoxy resin emulsions for basalt fiber sizing agents, achieving stable emulsions and significant performance enhancements.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2021)

Article Nanoscience & Nanotechnology

Hierarchically porous Co/C nanocomposites for ultralight high-performance microwave absorption

Peitao Xie et al.

Summary: This study prepared Co/C nanocomposites with Co nanoparticles uniformly distributed in amorphous carbon sheets, achieving excellent absorption performance through hierarchical porous microstructures. Excellent absorption performance was achieved at 10% and 15% Co/C content levels, providing a new pathway for designing ultralight absorbers.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2021)

Article Materials Science, Multidisciplinary

CNT@NiO/natural rubber with excellent impedance matching and low interfacial thermal resistance toward flexible and heat-conducting microwave absorption applications

Maofan Zhou et al.

Summary: The study successfully fabricated CNT@NiO core-shell structures using a modified atomic layer deposition (ALD) method, significantly improving microwave absorption properties. The NiO coating can be uniformly grown onto the surface of CNTs, leading to enhanced reflection loss, while the effective absorption frequency can be regulated by adjusting the cycle number of ALD NiO.

JOURNAL OF MATERIALS CHEMISTRY C (2021)

Review Chemistry, Multidisciplinary

Biobased Thermosetting Epoxy: Present and Future

Remi Auvergne et al.

CHEMICAL REVIEWS (2014)