| 微孔发泡聚乳酸/木纤维复合材料的泡孔结构 |
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| 引用本文： | 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. DOI: 10.3969/j.issn.0438-1157.2013.11.051 |
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| 作者姓名： | 李少军 黄汉雄 许琳琼 |
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| 作者单位： | 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 |
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| 基金项目： | 国家自然科学基金项目(11172105)~~ |
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| 摘 要： | 引言聚乳酸(PLA)因具有环境友好性和降解性而被用于制备不同泡孔结构的泡沫制品[1],然而PLA呈现低的熔体强度和窄的加工窗口,这不利于以超临界流体(如超临界二氧化碳Sc-CO2)发泡制备微孔PLA材料[2-3]。加入填料(如二氧化硅[4]、羟基磷灰石[5]和蒙脱土[6]等)可改善PLA
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| 关 键 词： | 聚乳酸 木纤维 超临界发泡 黏弹性 泡孔结构 |
| 收稿时间： | 2013-04-15 |
| 修稿时间： | 2013-05-05 |
Cellular structure of microcellular poly(lactic acid)/wood fiber composite foams |
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| LI Shaojun;HUANG Hanxiong;XU Linqiong. Cellular structure of microcellular poly(lactic acid)/wood fiber composite foams[J]. Journal of Chemical Industry and Engineering(China), 2013, 64(11): 4262-4268. DOI: 10.3969/j.issn.0438-1157.2013.11.051 |
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| Authors: | LI Shaojun HUANG Hanxiong XU Linqiong |
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| Affiliation: | Center for Polymer Processing Equipment and Intellectualization, South China University of Technology, Guangzhou 510640, Guangdong, China |
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| 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. |
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| Keywords: | poly(lactic acid) wood fiber supercritical foaming viscoelasticity cellular structure |
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