Mechanical and thermal properties of polyvinyl acetate foams reinforced with biopolymers

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-07-31 DOI:10.1177/02624893231193501

M. E. Ergun, E. Ozen, N. Yildirim, Berk Dalkilic, Ergun Baysal

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引用次数: 1

Abstract

The study developed and designed polyvinyl acetate (PVAc) foams using advanced freeze-drying technology, which exhibited good heat-insulating ability, flame retardancy, and mechanical properties. Different combinations of bleach kraft pulp, water-soluble chitosan, and zinc borate were used to reinforce the foams. The foams exhibited desirable compression and flexural properties, with compression strength and compression modulus ranging from 0.01 MPa to 0.08 MPa and 0.05 MPa to 0.29 MPa, respectively, while flexural strength and flexural modulus ranged from 0.12 MPa to 5.37 MPa and 9.86 MPa to 260,85 MPa, respectively. The use of zinc borate as a reinforcement resulted in improved thermal properties and reduced mass loss at 600°C by 20.69%. Thermal conductivity tests indicated that the foams had low thermal conductivity values ranging from 0.037 W/mK to 0.074 W/mK. The foams with zinc borate (60 g/L) and high molecular weight water-soluble chitosan (70 g/L) reinforcement exhibited high limiting oxygen index (LOI) of 28.72%. Overall, the results suggest that the PVAc foams could serve as a promising sustainable alternative in thermal insulation and construction fields.

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生物聚合物增强聚乙酸乙烯酯泡沫的力学和热性能

采用先进的冷冻干燥技术开发设计了具有良好隔热性能、阻燃性能和力学性能的聚醋酸乙烯酯(PVAc)泡沫材料。用漂白硫酸盐浆、水溶性壳聚糖和硼酸锌的不同组合来增强泡沫。泡沫材料具有良好的抗压和抗弯性能，抗压强度和抗压模量分别为0.01 MPa ~ 0.08 MPa和0.05 MPa ~ 0.29 MPa，抗弯强度和抗弯模量分别为0.12 MPa ~ 5.37 MPa和9.86 MPa ~ 260、85 MPa。使用硼酸锌作为增强剂可以改善热性能，并将600℃时的质量损失降低20.69%。导热系数测试表明，泡沫的导热系数较低，范围为0.037 ~ 0.074 W/mK。硼酸锌(60 g/L)和高分子量水溶性壳聚糖(70 g/L)增强泡沫的极限氧指数(LOI)较高，为28.72%。综上所述，研究结果表明，聚氯乙烯泡沫材料在保温和建筑领域具有良好的可持续发展前景。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.