聚丙烯腈基初生纤维孔结构的分析  

The pore structure of polyacrylonitrile nascent fibers

作　　者：郝俊杰[1,2] 吕春祥[1] 周普查[1] 李登华[1,2] 

机构地区：[1]碳纤维制备技术国家工程实验室中国科学院山西煤炭化学研究所,太原0300011 [2]中国科学院大学,北京100049

出　　处：《化工新型材料》2013年第10期133-135,共3页New Chemical Materials

摘　　要：利用热孔计法(Thermoporometry)和压汞法研究湿法纺丝过程中初生纤维孔结构的变化规律。讨论牵伸倍数和牵伸温度对初生纤维孔结构的影响。结果表明,一浴纤维和二浴纤维以介孔和大孔为主且多为开孔,热牵纤维以介孔为主且部分孔发生闭合;初生纤维的孔径和孔隙率随着纺丝过程进行逐渐变小,孔分布也逐渐变窄;孔径和孔隙率随着牵伸倍数的增加而减小,提高温度有利于加速这一过程。就分析方法而言,压汞法可以避免热孔计法在分析大孔方面的不足,比较适合分析一浴纤维和二浴纤维的孔结构;而热孔计法可以避免压汞法不能分析开孔的弊端,因此更适合分析热牵纤维的孔结构。The pore structure variation law of polyacrylonitrile nascent fibers in the wet pinning was studied by thermoporometry and mercury porosimetry. The influences of stretch ratio and stretch temperature on the pore structure were also discussed. Results indicated that most pores of the fibers in the first bath and second bath were macropores, me- sopores and open,but pores of the fibers in the hot stretching were mesopores and partly closed. During the wet spinning process,pore size and porosity were decreased and pore size distribution became narrow. Pore size and porosity were de- creased with increasing stretch ratio and stretch temperature. The mercury porosimetry was appropriate for open pores which were macropore and mesopore, and the thermoporometry was well suited to analyzing both open and close pores which were mesopore. For this reason, the mercury porosimetry were very well suited for the nascent fibers in the first bath and second bath, while the thermoporometry was very well suited to analyzing the fibers in the hot stretching.

关 键 词：聚丙烯腈基初生纤维 湿法纺丝 孔结构 热孔计法 压汞法 

分 类 号：TQ342.31[化学工程—化纤工业]