Cellular structure of microcellular poly(lactic acid)/wood fiber composite foams

doi:10.3969/j.issn.0438-1157.2013.11.051

CIESC Journal ›› 2013, Vol. 64 ›› Issue (11): 4262-4268.DOI: 10.3969/j.issn.0438-1157.2013.11.051

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Cellular structure of microcellular poly(lactic acid)/wood fiber composite foams

LI Shaojun, HUANG Hanxiong, XU Linqiong

Center for Polymer Processing Equipment and Intellectualization, South China University of Technology, Guangzhou 510640, Guangdong, China

Received:2013-04-15 Revised:2013-05-05 Online:2013-11-05 Published:2013-11-05
Supported by:
supported by the National Natural Science Foundation of China(11172105).

微孔发泡聚乳酸/木纤维复合材料的泡孔结构

李少军, 黄汉雄, 许琳琼

华南理工大学塑料橡胶装备及智能化研究中心, 广东广州 510640

通讯作者: 黄汉雄
作者简介:李少军(1987-),男,硕士研究生。
基金资助:
国家自然科学基金项目(11172105)。

Abstract

Abstract: By using supercritical carbon dioxide as physical foaming agent,microcellular poly(lactic acid)/wood fiber(PLA/WF)composite foams were prepared in a batch process via depressurization.The cellular structures of the foamed PLA/WF composites were observed by means of scanning electron microscope.The effect of WF content on cellular structure was investigated by analyzing the microstructure and rheological properties of the PLA/WF composites.The addition of WF induced higher storage modulus and complex viscosity of the PLA/WF composites in the low frequency range,resulting in much more uniform cellular structure.Cell density increased and cell size decreased gradually with the increase of WF content.The uniformity of cellular shape and structure was high for the foamed composite sample with 10%(mass) WF,whereas the uniformity decreased for those with 20% and 30% WF.

Key words: poly(lactic acid), wood fiber, supercritical foaming, viscoelasticity, cellular structure

关键词: 聚乳酸, 木纤维, 超临界发泡, 黏弹性, 泡孔结构

CLC Number:

TQ321.5

LI Shaojun, HUANG Hanxiong, XU Linqiong. Cellular structure of microcellular poly(lactic acid)/wood fiber composite foams[J]. CIESC Journal, 2013, 64(11): 4262-4268.

李少军, 黄汉雄, 许琳琼. 微孔发泡聚乳酸/木纤维复合材料的泡孔结构[J]. 化工学报, 2013, 64(11): 4262-4268.

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Cellular structure of microcellular poly(lactic acid)/wood fiber composite foams

微孔发泡聚乳酸/木纤维复合材料的泡孔结构

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