4.8 Article

Humidity-Responsive Shape Memory Polyurea with a High Energy Output Based on Reversible Cross-Linked Networks

Related references

Note: Only part of the references are listed.
Article Nanoscience & Nanotechnology

Photoprogrammable Moisture-Responsive Actuation of a Shape Memory Polymer Film

Jieying Xue et al.

Summary: This study reports on a method to achieve programmable humidity-responsive actuating behaviors by introducing photoprogrammable hygroscopic patterns into shape memory polymers. The researchers found that by treating the polymer surface to form an Fe3+-carboxylate coordinating network, transient hygroscopic gradients can be generated under UV light, driving the deformation of the polymer. Furthermore, the shape memory effect can be effectively used to adjust the direction and amplitude of the moisture-driven actuating behavior.

ACS APPLIED MATERIALS & INTERFACES (2022)

Article Chemistry, Multidisciplinary

Cholesteric Cellulose Liquid Crystals with Multifunctional Structural Colors

Zhuohao Zhang et al.

Summary: This study introduces a novel composite cellulose cholesteric liquid crystals as a bionic prototype for biological structural coloration, allowing for color range adjustments and dynamic control. By incorporating polymer monomers and crosslinking polymers, a series of structural color materials with high-resolution patterns have been developed, showing potential applications in wearable sensors, graphic displays, and information encryption.

ADVANCED FUNCTIONAL MATERIALS (2022)

Article Chemistry, Physical

Stretchable and transparent multimodal electronic-skin sensors in detecting strain, temperature, and humidity

Liangren Chen et al.

Summary: This study develops a stretchable and transparent multimodal electronic skin sensor with multiple sensing capabilities in strain, temperature, and humidity. The sensor exhibits high stretchability and outstanding transparency, as well as a wide strain sensing range, rapid response, high-precision thermosensation, and excellent humidity sensing performance. Moreover, the sensor possesses excellent recyclability.

NANO ENERGY (2022)

Article Nanoscience & Nanotechnology

Nanostructured block copolymer muscles

Chao Lang et al.

Summary: This study reports on the fabrication of nanostructured fibres using solution-phase block copolymer self-assembly and strain-programmed crystallization, which exhibit excellent mechanical properties, multi-trigger actuation, and high-performance rotation. The fibres possess highly aligned nanoscale structures with alternating crystalline and amorphous domains, resembling the pattern of mammalian skeletal muscle. Compared to current actuators, these nanostructured block copolymer muscles show superior efficiency, actuation strain, and mechanical properties, and can perform on/off rotary actuation and multi-trigger actuation.

NATURE NANOTECHNOLOGY (2022)

Article Materials Science, Multidisciplinary

Programmable and reconfigurable hygro-thermo morphing materials with multifunctional shape transformation

Qinyu Li et al.

Summary: Humidity responsive materials, based on natural fibers and shape memory polymers, have been developed for soft robotics and deployable structures. These programmable composite materials can achieve shape changes in different humidity conditions, and demonstrate high stiffness for structural load-bearing applications. The multifunctional capabilities of these bio-based hygro-thermo composites are demonstrated in bio-robotic grasping and electro-adhesive gripping.

APPLIED MATERIALS TODAY (2022)

Article Materials Science, Multidisciplinary

Shape Memory Supramolecular Polyurea with Adjustable Toughness and Ultrahigh Energy Density

Wen Liu et al.

Summary: Shape memory polyurea elastomers with adjustable strength and toughness were achieved through the engineering of a supramolecular structure with quadruple and double hydrogen bonding arrays. The polyurea showed ultrahigh toughness and adjustable tensile strength, as well as shape memory and self-healing properties.

ACS APPLIED POLYMER MATERIALS (2022)

Article Chemistry, Multidisciplinary

Molecularly Engineered Unparalleled Strength and Supertoughness of Poly(urea-urethane) with Shape Memory and Clusterization-Triggered Emission

Xiaoyue Wang et al.

Summary: Ultrastrong and supertough shape-memory poly(urea-urethane) material with excellent durability and fluorescence properties is fabricated through molecular engineering.

ADVANCED MATERIALS (2022)

Article Nanoscience & Nanotechnology

Touch-Responsive Hydrogel for Biomimetic Flytrap-Like Soft Actuator

Junjie Wei et al.

Summary: This article introduces a new touch-responsive polymeric hydrogel and proposes a touch stimulation inspired by flytrap, which is based on supersaturated salt solution. The hydrogel exhibits multiple responsive behaviors such as crystallization, heat releasing, and electric signal under touch stimulation. By utilizing a flytrap-like cascade response strategy, researchers fabricated a soft actuator with touch-responsive actuation.

NANO-MICRO LETTERS (2022)

Review Chemistry, Multidisciplinary

A Review of Shape Memory Polymers and Composites: Mechanisms, Materials, and Applications

Yuliang Xia et al.

Summary: SMPs and SMPCs, as stimuli-responsive polymers, have broad application prospects in multiple fields with features of large recoverable deformation, enhanced mechanical properties, and controllable remote actuation. These materials combine functional, reversible, multiple, and controllable shape recovery processes, applicable in aerospace engineering, biomedical devices, flexible electronics, and soft robotics among others.

ADVANCED MATERIALS (2021)

Article Materials Science, Multidisciplinary

Thermally controlled large deformation in temperature-sensitive hydrogels bilayers

Jianying Hu et al.

Summary: This study investigates the thermally controlled deformation characteristics of temperature-sensitive hydrogels bilayers and develops a finite element model to depict the continuous deformation features of temperature-sensitive hydrogels. Various complex and interesting thermally controlled cases are presented, including grippers, self-folding boxes, and thermally driven origami to illustrate a wide array of applications or phenomena. A simple model is developed to theoretically calculate the bending angle of temperature-sensitive hydrogel bilayers, validated by finite element simulation results.

INTERNATIONAL JOURNAL OF SMART AND NANO MATERIALS (2021)

Article Nanoscience & Nanotechnology

4D Printing of Bioinspired Absorbable Left Atrial Appendage Occluders: A Proof-of-Concept Study

Cheng Lin et al.

Summary: The study developed a 4D printed patient-specific absorbable left atrial appendage occluder with favorable biocompatibility and durability. The occluder can match the deformation of LAA tissue to reduce complications.

ACS APPLIED MATERIALS & INTERFACES (2021)

Article Chemistry, Physical

Multiresponse Shape-Memory Nanocomposite with a Reversible Cycle for Powerful Artificial Muscles

Chi Chen et al.

Summary: A novel multifunctional programmable artificial muscle was designed, combining the advantages of semicrystalline polymers and liquid crystal elastomers, showcasing remarkable performance and programmability. Through the combination of photoisomerization and photothermal conversion, the artificial muscle could rapidly achieve light-induced deformation and restoration, offering new possibilities for photoinduced actuation.

CHEMISTRY OF MATERIALS (2021)

Article Materials Science, Composites

Excellent triple-shape memory effect and superior recovery stress of ethylene-vinyl acetate copolymer fiber

Xiaoming Qi et al.

Summary: The study successfully achieved excellent triple shape memory effect by regulating the crystalline structure transformation of EVA fibers. Dynamic mechanical analysis and differential scanning calorimetry observed a wide melting transition temperature, indicating the superior shape memory effect and tunable reversible effect of EVA fibers. Thermo-mechanical testing showed that EVA fibers have the ability to achieve an excellent triple shape memory effect and a superior recovery stress.

COMPOSITES SCIENCE AND TECHNOLOGY (2021)

Article Chemistry, Multidisciplinary

A Moisture-Driven Actuator Based on Polydopamine-Modified MXene/Bacterial Cellulose Nanofiber Composite Film

Luyu Yang et al.

Summary: The study introduced a novel composite film composed of polydopamine-modified MXene and bacterial cellulose nanofibers, presenting improved properties as a moisture-driven actuator. The actuator showed high conductivity, excellent tensile strength and toughness, as well as being highly sensitive to moisture with fast response and high actuation force output. The research aimed to address the drawbacks of current MXene-based actuators and pave the way for their broader applications as moisture-driven devices.

ADVANCED FUNCTIONAL MATERIALS (2021)

Article Chemistry, Multidisciplinary

Healable and Recyclable Elastomers with Record-High Mechanical Robustness, Unprecedented Crack Tolerance, and Superhigh Elastic Restorability

Zequan Li et al.

Summary: The material inspired by spider silk has higher strength and toughness, with exceptional crack tolerance and elastic restorability. These extraordinary mechanical performances mainly originate from meticulously engineered hydrogen-bonding segments, making it the strongest and toughest healable elastomer so far.

ADVANCED MATERIALS (2021)

Article Chemistry, Multidisciplinary

An Ultra-Low-Temperature Elastomer with Excellent Mechanical Performance and Solvent Resistance

Qiang Ma et al.

Summary: The elastomer based on perfluoropolyether (PFPE) with dynamic urethane chemistry provides excellent elasticity, ductility, and chemical resistance at extreme low temperatures. It shows low-swelling characteristics in sealing applications and can be reprocessed for recycling and reuse. This elastomer may inspire global interest in designing elastic devices for extremely low temperatures.

ADVANCED MATERIALS (2021)

Article Chemistry, Multidisciplinary

High Energy Density Shape Memory Polymers Using Strain-Induced Supramolecular Nanostructures

Christopher B. Cooper et al.

Summary: Shape memory polymers are promising materials due to their large extensibility and shape recovery, but are limited by low energy densities. A new approach based on strain-induced supramolecular nanostructures has been developed to achieve high energy density shape memory polymers, storing large amounts of entropic energy.

ACS CENTRAL SCIENCE (2021)

Article Materials Science, Multidisciplinary

High-temperature shape memory photopolymer with intrinsic flame retardancy and record-high recovery stress

Xiaming Feng et al.

Summary: This study introduces an intrinsically flame-retardant high-temperature shape memory photopolymer with ultrahigh glass transition temperature and record-breaking recovery stress, addressing the need for photopolymers with high Tg, flame-retardancy, and high recovery stress in various industries. The novel HTSMP demonstrates excellent thermal stability, intrinsic flame retardancy, and 3D printability, making it promising for applications in deployable structures, damage self-healing, actuators, proppants, 4D printing, and robotics.

APPLIED MATERIALS TODAY (2021)

Article Chemistry, Multidisciplinary

High-Performance Polymeric Materials through Hydrogen-Bond Cross-Linking

Pingan Song et al.

ADVANCED MATERIALS (2020)

Review Chemistry, Multidisciplinary

Materials as Machines

Joselle M. McCracken et al.

ADVANCED MATERIALS (2020)

Article Chemistry, Multidisciplinary

Highly Conductive MXene Film Actuator Based on Moisture Gradients

Jingfeng Wang et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2020)

Article Nanoscience & Nanotechnology

Quadruple Hydrogen Bonding Supramolecular Elastomers for Melt Extrusion Additive Manufacturing

Xi Chen et al.

ACS APPLIED MATERIALS & INTERFACES (2020)

Article Materials Science, Multidisciplinary

A reusable SMA actuated non-explosive lock-release mechanism for space application

Xueting Pan et al.

INTERNATIONAL JOURNAL OF SMART AND NANO MATERIALS (2020)

Article Multidisciplinary Sciences

Inside-Out 3D Reversible Ion-Triggered Shape-Morphing Hydrogels

X. Du et al.

Research (2019)

Article Multidisciplinary Sciences

Leaf-inspired multiresponsive MXene-based actuator for programmable smart devices

Guofa Cai et al.

SCIENCE ADVANCES (2019)

Article Chemistry, Multidisciplinary

Towards Dynamic but Supertough Healable Polymers through Biomimetic Hierarchical Hydrogen-Bonding Interactions

Yan Song et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2018)

Article Materials Science, Multidisciplinary

Biomimetic Graphene Actuators Enabled by Multiresponse Graphene Oxide Paper with Pretailored Reduction Gradient

Dong-Doug Han et al.

ADVANCED MATERIALS TECHNOLOGIES (2018)

Review Chemistry, Multidisciplinary

Biomimetic and Bioinspired Synthesis of Nanomaterials/Nanostructures

Guangtao Zan et al.

ADVANCED MATERIALS (2016)

Article Chemistry, Physical

An autonomous actuator driven by fluctuations in ambient humidity

Hiroki Arazoe et al.

NATURE MATERIALS (2016)

Article Chemistry, Multidisciplinary

Enhancing Mechanical Performance of a Covalent Self-Healing Material by Sacrificial Noncovalent Bonds

James A. Neal et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2015)

Article Multidisciplinary Sciences

Photogated humidity-driven motility

Lidong Zhang et al.

NATURE COMMUNICATIONS (2015)

Article Multidisciplinary Sciences

Shape memory polymers with high and low temperature resistant properties

Xinli Xiao et al.

SCIENTIFIC REPORTS (2015)

Article Multidisciplinary Sciences

Moisture-responsive films of cellulose stearoyl esters showing reversible shape transitions

Kai Zhang et al.

SCIENTIFIC REPORTS (2015)

Article Chemistry, Multidisciplinary

Polymer-Based Muscle Expansion and Contraction

Molla R. Islam et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2013)

Article Multidisciplinary Sciences

Biomimetic self-templating supramolecular structures

Woo-Jae Chung et al.

NATURE (2011)