聚乙烯醇/微纤化纤维素复合微发泡材料的制备

doi:10.11949/j.issn.0438-1157.20141004

化工学报 ›› 2015, Vol. 66 ›› Issue (2): 806-813.DOI: 10.11949/j.issn.0438-1157.20141004

• 材料化学工程与纳米技术 • 上一篇下一篇

聚乙烯醇/微纤化纤维素复合微发泡材料的制备

赵娜^1,2, 李倩^1,2, Chul B. Park³

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

收稿日期:2014-07-03 修回日期:2014-09-05 出版日期:2015-02-05 发布日期:2015-02-05
通讯作者: 李倩, Chul B. Park
基金资助:
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)。

Foaming of poly(vinyl alcohol)/microfibrillated cellulose composites

ZHAO Na^1,2, LI Qian^1,2, Chul B. Park³

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

Received:2014-07-03 Revised:2014-09-05 Online:2015-02-05 Published:2015-02-05
Supported by:
supported by the National Natural Science Foundation of China (11372286) and the National Basic Research Program of China (2012CB025903).

摘要/Abstract

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。

关键词: 聚乙烯醇, 超临界二氧化碳, 挤出, 发泡, 成核

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.

Key words: polyvinyl alcohol, supercritical carbon dioxide, extrusion, foam, nucleation

中图分类号:

TQ328.06

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.

ZHAO Na, LI Qian, Chul B. Park. Foaming of poly(vinyl alcohol)/microfibrillated cellulose composites[J]. CIESC Journal, 2015, 66(2): 806-813.

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聚乙烯醇/微纤化纤维素复合微发泡材料的制备

Foaming of poly(vinyl alcohol)/microfibrillated cellulose composites

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