合成纤维

2013, v.42;No.298(12) 10-15

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溶解方式对聚丙烯腈-离子液体溶液和纤维的影响
Influence of Dissolution Method on the Characteristics of Polyacrylonitrile Solution and Fiber with Ionic Liquid as Solvent

张恩杰;殷学敏;程海明;易志文;王华平;张玉梅;
ZHANG En-jie;YIN Xue-min;CHENG Hai-ming;YI Zhi-wen;WANG Hua-ping;ZHANG Yu-mei;College of Material Science and Engineering,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Donghua University;

摘要(Abstract):

通过静置、搅拌和捏合3种不同的溶解方式制备了聚丙烯腈(PAN)质量分数为13%的PAN-[BMIM]Cl(1-丁基-3-甲基咪唑氯盐)溶液。采用旋转流变仪研究了这3种溶液的流变特性,发现捏合溶解得到的溶液的零切黏度与松弛时间最小,非牛顿指数最大,溶液性质均一稳定。利用制备的纺丝溶液进行干喷湿纺试验,发现静置溶解的纺丝溶液无法纺丝,而捏合溶解的纺丝溶液可实现较高倍数的喷头拉伸和水浴拉伸。结合广角X射线衍射(WAXD)、力学性能测试、动态力学分析(DMA)等测试方法,对比分析了两种溶解方法制备的PAN纤维的超分子结构和性能,发现捏合溶解纺丝得到的纤维结构更为均匀,力学性能更好。
The 13 % PAN-[BMIM]Cl solutions were prepared by dissolving polyacrylonitrile(PAN) in 1-butyl-3-methylimidazolium chloride([BMIM]Cl) by static state,stirring and kneading,respectively.The rheological behavior of the PAN-[BMIM]Cl solutions were investigated by rotational rheometer.It was found that the zero-shear-rate viscosity and relaxation time were smaller and the non-Newtonian index was larger of the solution prepared by kneading.The polyacrylonitrile fibers were prepared by dry-jet wet spinning technology from the PAN-[BMIM]Cl solutions prepared by stirring and kneading,respectively.And a higher draw ratio could be achieved of the fibers processed with the solution prepared by kneading.The supramolecular structure and properties of polyacrylonitrile fibers were studied with synchrotron wideangle X-ray diffraction(WAXD) technologies,dynamic mechanical analysis(DMA) and mechanical tests.It was shown that the structure of the fibers processed with the solution prepared by kneading was more uniformly,which was helpful to improve the mechanical properties.

关键词(KeyWords): 聚丙烯腈;溶解方式;流变特性;力学性能;超分子结构
polyacrylonitrile,dissolution method,rheological behavior,mechanical property,supramolecular structure

Abstract:

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基金项目(Foundation): 国家自然基金项目(51273041)资助

作者(Author): 张恩杰;殷学敏;程海明;易志文;王华平;张玉梅;
ZHANG En-jie;YIN Xue-min;CHENG Hai-ming;YI Zhi-wen;WANG Hua-ping;ZHANG Yu-mei;College of Material Science and Engineering,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Donghua University;

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DOI: 10.16090/j.cnki.hcxw.2013.12.007

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