4.7 Article

Impact of Different Ratios of Lignin Waste and Liquid Glass on the Performance Characteristics of Biopolyurethane Foams

Related references

Note: Only part of the references are listed.
Article Engineering, Environmental

Influence of natural exposure on castor oil based polyurethane reinforced with waste tire rubber

Nycolle G. S. Silva et al.

Summary: Waste tire rubber (WTR) is generated extensively due to the growth of mobility needs and is constantly discharged into the environment with limited reuse options. This study explores the usage of WTR particles (5-20% by weight) in castor oil-based polyurethane foams, aiming to reduce fossil resource usage and contribute to a circular economy. The effects of photo-oxidation and hydrolysis on the foams' performance were analyzed by determining their morphological, thermal, chemical, and mechanical properties before and after exposure to open air. The results show that the addition of WTR increases foam density and reduces cell size, enhancing compressive behavior. After weathering, the degradation may lead to increased crosslinking density and structural changes, such as yellowing and voids. The rubber also slightly affects thermal stability and shows potential for improved fire retardancy.

WASTE MANAGEMENT (2023)

Article Construction & Building Technology

Closed-cell polyurethane spray foam obtained with novel TiO2-ZnO hybrid fillers-mechanical, insulating properties and microbial purity

Przemyslaw Bartczak et al.

Summary: Currently, there is a lot of attention on organic-inorganic composite materials due to their unique properties. This study investigates the effect of incorporating inorganic oxide fillers (TiO2 and TiO2-ZnO) on the mechanical, insulating, and microbial properties of polyurethane spray foam, a building material. The results show that adding inorganic fillers improves the strength, thermal properties, and microbial purity of the foam. The use of such materials can significantly enhance the insulation quality and overall indoor environmental quality.

JOURNAL OF BUILDING ENGINEERING (2023)

Review Engineering, Environmental

A review on lignin waste valorization by catalytic pyrolysis: Catalyst, reaction system, and industrial symbiosis mode

Shaoqing Wang et al.

Summary: This review aims to summarize the latest developments in the valorization of lignin waste by catalytic pyrolysis, focusing on the aspects of lignin structure characteristics, catalytic pyrolysis mode, catalyst types, and catalytic pyrolysis reaction system. Based on a critical analysis of the scientific literature, an industrial symbiosis model for the comprehensive utilization of lignin waste in biorefinery was proposed, with a focus on catalytic pyrolysis technology. The latest advancements in catalyst and catalytic pyrolysis reaction system development in the lignin pyrolysis process were emphatically analyzed.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2023)

Article Engineering, Environmental

Effect of Brown-Rotted Spruce as Lignin-Enriched Filler on the Properties of Reinforced Polyurethane Foam

Yuna Kan et al.

Summary: The study investigated the effect of using decayed lignocellulosic biomass filler on the preparation and properties of polyurethane foam. The results showed that the addition of decayed lignocellulosic biomass improved the physical properties of the foam, including low density, low thermal conductivity, and high water absorption. These properties were found to be dependent on the amount of filler added.

JOURNAL OF POLYMERS AND THE ENVIRONMENT (2022)

Article Agricultural Engineering

Preparation of bio-based polyurethane hydroponic foams using 100% bio-polyol derived from Miscanthus through organosolv fractionation

Hongwei Li et al.

Summary: A novel bio-based polyurethane (BPU) hydroponic foam was developed by replacing up to 100% of petroleum-derived polyol with bio-polyol derived from cost-effective organosolv fractionation of Miscanthus. The foam exhibited high open cell content, high water absorption capacity, low mechanical strength, good cell uniformity, and thermal stability, making it suitable for horticultural growing media in hydroponics.

INDUSTRIAL CROPS AND PRODUCTS (2022)

Article Polymer Science

Comprehensive Analysis of the Influence of Expanded Vermiculite on the Foaming Process and Selected Properties of Composite Rigid Polyurethane Foams

Mateusz Barczewski et al.

Summary: This article presents the results of research on developing new polyurethane foams modified with thermally expanded vermiculite. The effect of different filler contents on foaming process, cell structure, thermal insulation, mechanical properties, and flammability is evaluated. The results show that the addition of vermiculite has minimal impact on the foaming process and cell structure, but significantly affects the closed cell content. Adding up to 15% vermiculite does not significantly influence the mechanical properties and flammability, which is economically important as it allows for cost reduction without compromising material performance.

POLYMERS (2022)

Article Chemistry, Physical

Properties of Rigid Polyurethane Foam Filled with Sawdust from Primary Wood Processing

Dorota Dukarska et al.

Summary: This study investigates the possibility of using sawdust as a filler for polyurethane foams. The results show that adding up to 10% sawdust can improve the foam's properties while slightly decreasing its compressive and bending strengths, and increasing water absorption.

MATERIALS (2022)

Article Polymer Science

Effect of Graphene/Spherical Graphite Ratio on the Properties of PLA/TPU Composites

Zenghui Yang et al.

Summary: This paper investigates the microwave absorbing properties and mechanical properties of composite materials using graphene and spherical graphite as absorbents and polylactic acid and thermoplastic polyurethane as matrices. The experimental results show that the composite materials exhibit better absorbing performance at a lower ratio of spherical graphite to graphene, while they have higher mechanical strength at a higher ratio. Moderate ratios can maintain both absorbing and mechanical properties.

POLYMERS (2022)

Article Chemistry, Physical

Polyurethane foam based composite phase change microcapsules with reinforced thermal conductivity for cold energy storage

Xinyu Zhai et al.

Summary: The purpose of this research is to develop a new type of core/wall material reinforced microcapsules and apply them to polyurethane foam for cold chain transportation. The addition of Nano-CuO and CNTs has minimal effect on the microcapsule structure, but significantly improves the thermal conductivity. By incorporating microcapsules into polyurethane foam, the cell structure becomes denser and the cold storage capacity is greatly increased.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2022)

Article Polymer Science

Effect of bio-based polyols and chain extender on the microphase separation structure, mechanical properties and morphology of rigid polyurethane foams

Kaisen Jiang et al.

Summary: This study analyzed the microphase separation behavior and thermodynamic properties of rigid polyurethane foams prepared from bio-based polyols. The addition of bio-based polyols increased the hydrogen bond content and suppressed the microphase separation tendency. With the addition of a chain extender, the foam showed increased compressive strength and proportion of ordered hydrogen bonds, indicating an increase in the degree of microphase separation.

EUROPEAN POLYMER JOURNAL (2022)

Article Materials Science, Ceramics

Synergistic effect of silica aerogels and hollow glass microspheres on microstructure and thermal properties of rigid polyurethane foam

Longtao Hou et al.

Summary: In this study, novel rigid polyurethane foam composites modified by silica aerogels and hollow glass microspheres were prepared and their microstructure, mechanical, physical, and thermal properties were characterized. The results showed that the addition of fillers improved the thermal conductivity, compressive strength, and thermal stability of the foam, while reducing the heat release and smoke production.

JOURNAL OF NON-CRYSTALLINE SOLIDS (2022)

Article Chemistry, Physical

Comprehensive Enhancement of Prepolymer-Based Flexible Polyurethane Foams' Performance by Introduction of Cost-Effective Waste-Based Ground Tire Rubber Particles

Wiktoria Zukowska et al.

Summary: Recycled ground tire rubber (GTR) particles from postconsumer car tires can be used as a cost-effective filler for flexible polyurethane foams, enhancing their performance, reducing costs, and limiting environmental impacts. The introduction of GTR leads to improvements in foam structure and properties.

MATERIALS (2022)

Article Polymer Science

Rigid Polyurethane Biofoams Filled with Chemically Compatible Fruit Peels

Andrey Pereira Acosta et al.

Summary: This study explores the use of banana and bergamot peels as fillers in the development of rigid polyurethane foam composites. The results show that the addition of up to 15% of fillers can improve the thermal stability and cell size of the composites, while maintaining similar water uptake, density, compressive strength, and color properties compared to neat RPUF.

POLYMERS (2022)

Article Polymer Science

Insights into Stoichiometry Adjustments Governing the Performance of Flexible Foamed Polyurethane/Ground Tire Rubber Composites

Adam Olszewski et al.

Summary: Polyurethanes (PU) are widely used in the industry and their performance can be adjusted by changes in the isocyanate index. This study focuses on the impact of additives on the performance of PU foams, and found that the use of different modified ground tire rubber (GTR) particles can significantly affect the mechanical, thermomechanical, and thermal properties of the composites. The results show that the properties of the composites are proportional to the hydroxyl values of GTR particles.

POLYMERS (2022)

Article Materials Science, Multidisciplinary

Eggshells biowaste filler for improving the anticorrosive behaviour of waterborne polyurethane coatings on mild steel in artificial seawater

Wan Mohamad Ikhmal Wan Mohamad Kamaruzzaman et al.

Summary: The efficacy of eggshell powders and TiO2 nanoparticles as anticorrosive pigments in waterborne polyurethane coatings has been investigated. The addition of a certain concentration of eggshell powders can enhance the coating's protection efficiency and maintain the integrity of the coating surface.

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T (2022)

Article Green & Sustainable Science & Technology

Open-cell bio-polyurethane foams based on bio-polyols from used cooking oil

Krzysztof Polaczek et al.

Summary: This article discusses the potential of using used cooking oil as a feedstock for producing open-cell polyurethane foam. The study focuses on the effects of bio-polyol properties on the properties of the final foam, and the key step in the synthesis of bio-polyols. The results show that the foams produced using used cooking oil-based polyols have comparable properties to commercial products.

JOURNAL OF CLEANER PRODUCTION (2022)

Proceedings Paper Materials Science, Multidisciplinary

Effects of water hyacinth fiber size on sound absorption properties of advanced recycled palm oil-based polyurethane foam composite

Nathapong Sukhawipat et al.

Summary: This study aims to investigate the effects of water hyacinth fiber size on the properties of recycled polyurethane foam composite. The results indicate that decreasing the fiber mesh size improves the composite's compression strength, and the 80-mesh fiber shows good sound absorption performance.

MATERIALS TODAY-PROCEEDINGS (2022)

Article Chemistry, Physical

The Impact of Ground Tire Rubber Oxidation with H2O2 and KMnO4 on the Structure and Performance of Flexible Polyurethane/Ground Tire Rubber Composite Foams

Aleksander Hejna et al.

Summary: The study examined the impact of GTR oxidation with hydrogen peroxide and potassium permanganate on the processing and properties of flexible polyurethane/GTR composite foams. Results showed that H2O2 modifications improved mechanical performance, while KMnO4 treatment accelerated the polymerization process.

MATERIALS (2021)

Article Biochemistry & Molecular Biology

Vermiculite Filler Modified with Casein, Chitosan, and Potato Protein as a Flame Retardant for Polyurethane Foams

Karolina Miedzinska et al.

Summary: The study found that vermiculite fillers modified with casein and chitosan significantly improved the properties of polyurethane foam, including increased compressive strength, flexural strength, and toughness. In addition, the polyurethane composites filled with these modified fillers exhibited improved flame resistance characteristics.

INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES (2021)

Review Environmental Sciences

Review on Conversion of Lignin Waste into Value-Added Resources in Tropical Countries

Huei Yeong Lim et al.

Summary: The potential of lignin, primarily for biofuels and chemicals, is large in tropical countries such as Brazil, Africa, and Southeast Asia. Brazil has the highest lignin potential and utilization level, while Africa has limited information and Southeast Asia has a lower utilization level. Integrated biorefinery is seen as a promising approach in Malaysia for feasible conversion and utilization of lignin.

WASTE AND BIOMASS VALORIZATION (2021)

Article Materials Science, Paper & Wood

Micro fibrillated cellulose reinforced bio-based rigid high-density polyurethane foams

Eduardo Fischer Kerche et al.

Summary: This study investigated the use of MFC as a reinforcement to improve the properties of bio-based RPUF, and found that MFC and overpacking have a synergistic effect in enhancing strength, stiffness, thermal stability and dynamic mechanical properties of RPUF.

CELLULOSE (2021)

Article Chemistry, Physical

Rigid Polyurethane Foams Modified with Biochar

Katarzyna Uram et al.

Summary: This study successfully prepared biochar-modified rigid polyurethane foams as thermal insulation materials. The introduction of biochar caused changes in foam cell shape and enhanced the dimensional and thermal stability of the foams. Additionally, the filler-containing systems exhibited reduced apparent densities while maintaining thermal conductivity.

MATERIALS (2021)

Article Polymer Science

Polyurethane Foam Composites Reinforced with Renewable Fillers for Cryogenic Insulation

Beatrise Sture et al.

Summary: Sawdust, microcellulose, and nanocellulose were utilized to reinforce rigid polyurethane foam composites for potential cryogenic insulation applications. However, the addition of fillers did not result in significant enhancements in the physical-mechanical properties of the composites, as observed in the study.

POLYMERS (2021)

Article Biochemistry & Molecular Biology

Reactivity of Aliphatic and Phenolic Hydroxyl Groups in Kraft Lignin towards 4,4′ MDI

Leonardo Dalseno Antonino et al.

Summary: Research has been conducted on the reactivity of lignin towards diisocyanates, revealing different reactivities of hydroxyl groups in kraft lignin towards MDI. The findings might provide support for new PU developments involving unmodified lignin or MDI-functionalized biopolymers.

MOLECULES (2021)

Article Biochemistry & Molecular Biology

Lignin as a Partial Polyol Replacement in Polyurethane Flexible Foam

Akash Gondaliya et al.

Summary: This study evaluated the suitability of various lignins in replacing 20% of petroleum-based polyol in PU foams, finding that the incorporation of lignin improved the foam's mechanical properties. The study also showed a positive correlation between lignin's hydroxyl content and foam properties, suggesting lignins with low hydroxyl content, high flexibility, and high solubility are better candidates for replacing petroleum-based polyols in flexible PU foams.

MOLECULES (2021)

Article Chemistry, Physical

Vegetable Fillers and Rapeseed Oil-Based Polyol as Natural Raw Materials for the Production of Rigid Polyurethane Foams

Milena Leszczynska et al.

Summary: The study focuses on incorporating renewable raw materials into rigid polyurethane foams to achieve sustainable development of polymer composites. Experimental results show that foams prepared with renewable raw materials exhibit improved environmental friendliness, thermal stability, and suitability for the demands of the circular economy.

MATERIALS (2021)

Article Biochemistry & Molecular Biology

Polyurethane Composites Reinforced with Walnut Shell Filler Treated with Perlite, Montmorillonite and Halloysite

Sylwia Czlonka et al.

Summary: By adding walnut shell fillers modified with various mineral compounds, the properties of polyurethane composites can be enhanced, particularly in terms of mechanical, thermal, and flame retardant properties. Composites filled with halloysite functionalized walnut shell filler exhibit the most significant improvements in performance, including compressive strength, flexural strength, and impact strength.

INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES (2021)

Article Biochemistry & Molecular Biology

Chlorine-Functional Silsesquioxanes (POSS-Cl) as Effective Flame Retardants and Reinforcing Additives for Rigid Polyurethane Foams

Anna Strakowska et al.

Summary: The research focused on the production of silsesquioxane modified rigid polyurethane (PUR) foams with reduced flammability, by introducing chlorine functional groups (chlorobenzyl, chloropropyl, chlorobenzylethyl). The influence of POSS modifiers on the functional properties, especially thermal and fire-retardant, of the obtained PUR-POSS-Cl systems was significant, as shown by various tests conducted.

MOLECULES (2021)

Article Materials Science, Characterization & Testing

Rigid polyurethane foams modified with thermoset polyester-glass fiber composite waste

Mateusz Barczewski et al.

POLYMER TESTING (2020)

Article Chemistry, Applied

Tuning of polyurethane foam mechanical and thermal properties using ball-milled cellulose

M. Stanzione et al.

CARBOHYDRATE POLYMERS (2020)

Review Materials Science, Paper & Wood

Biorefinery Review: Wide-Reaching Products Through Kraft Lignin

Iara F. Demuner et al.

BIORESOURCES (2019)

Article Engineering, Environmental

Polyurethane foam impregnated with lignin as a filler for the removal of crude oil from contaminated water

O. S. H. Santos et al.

JOURNAL OF HAZARDOUS MATERIALS (2017)

Article Biotechnology & Applied Microbiology

Lignin pyrolysis for profitable lignocellulosic biorefineries

Paul J. De Wild et al.

BIOFUELS BIOPRODUCTS & BIOREFINING-BIOFPR (2014)

Article Materials Science, Paper & Wood

Kraft Lignin-Based Rigid Polyurethane Foam

Yang Li et al.

JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY (2012)