超临界氮气法制备聚乳酸泡沫

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2020-03-30 DOI:10.1177/0262489320912357

Fatemeh Farhanmoghaddam, A. Javadi

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引用次数: 2

摘要

本文以超临界氮气为物理发泡剂，采用常规发泡法(CFP)和低温发泡法(LTFP)两种方法对聚乳酸(PLA)进行间歇发泡。研究了泡沫材料的制备工艺、细胞形态、热性能、结晶行为和电阻，探讨了发泡对聚乳酸这些性能的影响。结果表明，CFP法制备的泡沫具有微米级的孔尺寸，而LTFP法制备的泡沫具有纳米级的孔结构和较高的孔密度。扫描电镜也显示PLA泡沫具有非均相的细胞结构。结果表明:发泡过程提高了聚乳酸的熔点和结晶度，导致样品的电阻降低;

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Fabrication of poly (lactic acid) foams using supercritical nitrogen

In this article, poly (lactic acid) (PLA) was foamed via batch foaming using supercritical nitrogen as a physical blowing agent by two methods, conventional foaming process (CFP) and low-temperature foaming process (LTFP). The fabrication processes, cell morphologies, thermal properties, crystallization behavior, and electrical resistance of resulted foams were studied to investigate the effect of foaming on these properties of PLA. It was found that the foams resulted from CFP method have micrometric cell sizes, while LTFP method led to nanometric cell structure and high cell density. Also scanning electron microscopy showed that the PLA foams have a heterogeneous cellular structure. The results showed that the foaming process increased the melting point and degree of crystallinity of PLA, which led to decrease in the electrical resistance of samples.

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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.