Fabrication of poly (lactic acid) foams using supercritical nitrogen

IF 1.3 4区医学 Q4 MATERIALS SCIENCE, BIOMATERIALS

Cellular Polymers Pub Date : 2020-03-30 DOI:10.1177/0262489320912357

Fatemeh Farhanmoghaddam, A. Javadi

引用次数: 2

Abstract

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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超临界氮气法制备聚乳酸泡沫

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;

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Cellular Polymers 工程技术-材料科学：生物材料

CiteScore

3.10

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： Cellular Polymers is concerned primarily with the science of foamed materials, the technology and state of the art for processing and fabricating, the engineering techniques and principles of the machines used to produce them economically, and their applications in varied and wide ranging uses where they are making an increasingly valuable contribution. Potential problems for the industry are also covered, including fire performance of materials, CFC-replacement technology, recycling and environmental legislation. Reviews of technical and commercial advances in the manufacturing and application technologies are also included. Cellular Polymers covers these and other related topics and also pays particular attention to the ways in which the science and technology of cellular polymers is being developed throughout the world.