| 聚乙烯醇/微纤化纤维素复合微发泡材料的制备 |
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| 引用本文： | 赵娜,李倩,Chul B. Park.聚乙烯醇/微纤化纤维素复合微发泡材料的制备[J].化工学报,2015,66(2):806-813. |
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| 作者姓名： | 赵娜 李倩 Chul B. Park |
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| 作者单位： | 1.郑州大学微纳成型技术国家级国际联合研究中心, 微成型技术河南省重点实验室, 河南 郑州 450001;2.郑州大学橡塑 模具国家工程研究中心, 河南 郑州 450002;3.Microcellular Plastics Manufacturing Laboratory, University of Toronto, Toronto M5S 3G8, Canada |
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| 基金项目： | 国家自然科学基金项目(11372286)；国家重点基础研究发展计划项目(2012CB025903)。 |
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| 摘 要： | 通过溶液浇铸法制备了聚乙烯醇(PVOH)/微纤化纤维素(MFC)复合薄膜材料,以超临界二氧化碳(scCO2)为物理发泡剂,采用间歇式降压法制备了一系列PVOH/MFC复合微发泡材料,主要讨论了在没有水分的影响下,不同发泡温度和时间以及MFC含量对PVOH/MFC复合微发泡材料的泡孔形貌、泡孔尺寸和泡孔密度的影响;同时,也对MFC的分散性和PVOH/MFC复合材料的流变性能和热性能对发泡行为的影响进行了研究。实验结果表明,均匀分散在PVOH基体中的MFC作为异相成核剂提高了气孔成核能力,且随着MFC含量的增加,泡孔尺寸降低,泡孔密度增大;并研究了发泡温度对PVOH/MFC复合材料的发泡形貌的影响,获得最优发泡温度。
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| 关 键 词： | 聚乙烯醇 超临界二氧化碳 挤出 发泡 成核 |
| 收稿时间： | 2014-07-03 |
| 修稿时间： | 2014-09-05 |
Foaming of poly(vinyl alcohol)/microfibrillated cellulose composites |
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| ZHAO Na,LI Qian,Chul B Park.Foaming of poly(vinyl alcohol)/microfibrillated cellulose composites[J].Journal of Chemical Industry and Engineering(China),2015,66(2):806-813. |
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| Authors: | ZHAO Na LI Qian Chul B Park |
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| Affiliation: | 1.National Center for International Joint Research of Micro-nano Moulding Technology, Key Laboratory of Micro-moulding of Henan Province, Zhengzhou University, Zhengzhou 450001, Henan, China;2.National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450002, Henan, China;3.Microcellular Plastics Manufacturing Laboratory, University of Toronto, Toronto, M5S 3G8, Canada |
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| Abstract: | The effect of microfibrillated cellulose content and foaming temperature and time on the foaming behavior of dry poly(vinyl alcohol) (PVOH)/ microfibrillated cellulose (MFC) composites was investigated. PVOH/MFC composites were prepared by the solution film casting method and foamed via the batch depressurization foaming process with a physical blowing agent supercritical CO2. The rheological properties and thermal properties of PVOH/MFC composites were characterized. Microfibrillated cellulose fiber acted as nucleating agent during the foaming process, and there was an optimum processing temperature for achieving high-quality cellular morphology of the PVOH/MFC composites. |
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| Keywords: | polyvinyl alcohol supercritical carbon dioxide extrusion foam nucleation |
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