聚四氟乙烯/聚乙烯醇共混加硼湿法纺丝
聚四氟乙烯/聚乙烯醇共混加硼湿法纺丝Wet Spinning of PTFE/PVA and Boric Acid Blended Solution
作 者:王耀武 来侃 张昭环 姚穆 何志军
WANG Yao-wu,LAI Kan,ZHANG Zhao-huan,YAO Mu,HE Zhi-jun2(1. College of Textile and Clothing Engineering, Sooehow University, Suzhou 215021, Jiangsu, China; 2. College of Textile and Material Engineering, Xi'an Polytechnic University, Xi'an 710048, Shannxi,China)
机构地区:苏州大学纺织与服装工程学院,江苏苏州215021 西安工程大学纺织与材料学院,陕西西安710048
出 处:《合成纤维》 2011年第40卷第8期 8-11页,共4页
Synthetic Fiber in China
基 金:陕西省教育厅项目(项目编号08JZ26)
摘 要:以聚乙烯醇(PVA)为载体,利用加硼湿法纺丝法制备了聚四氟乙烯(门FE)/PVA共混初生纤维。采用扫描电子显微镜对共混初生纤维的形态结构进行了表征,通过Instron5565万能强力仪对单根初生纤维丝条的力学性能进行了测试。结果表明:PTFE/PVA共混纤维丝务的横截面形态为非圆形;PTFE/PVA质量比是湿法纺丝的重要因素,当PTFE/PVA质量比为80/20时,共混纤维丝条的截面较接近圆形,且结构密实,力学性能最好。
The as-spun fiber of polytetrafluorethylene/polyvinyl alcohol(PTFE/PVA) was produced through wet spinning of PTFE/PVA and boric acid blended solution. The cross-section of the produced fiber was analyzed with scanning electron microscope, and the mechanical property was tested with Instron5565 universal strength tester. The results indicated that the cross-section of PTFE/PVA blending fiber was not round. The weight ratio of PTFE/PVA in mixing solution was a key factor in the wet-spinning. When the weight ratio of PTFE/PVA was 80/20, the cross-section of PTFE/PVA blended fiber was approximate circular and compact, the fiber mechanical property was best.
关键词:聚四氟乙烯 聚乙烯醇 共混 湿法纺丝
polytetrafluoroethylene, polyvinyl alcohol, blending, wet spinning ;
分类号:TQ342.711 [工业技术 > 化学工业 > 化学纤维工业 > 合成纤维 > 特种纤维 > 聚氟烯烃纤维(含氟纤维)]
全文快照:1.3 共混纺丝液的制备1.3.1 PVA的选取PVA是人们熟悉的水溶性聚合物,由聚醋酸乙烯酯水解而得,它是白色、粉末状树脂。由于分子链上含有大量羟基侧基,PVA具有良好的水溶性。它还具有良好的成膜性、黏接性和乳化性,有卓越的耐油脂和耐溶剂性能,与各种水溶性树脂相容性好。PVA在150℃以上会充分软化而熔融,在空气中加热到200 oC以上很快分解。凶此,选择PVA作为聚四氟乙烯纺丝液的黏接剂和载体是完全可行的。本试验选用醇解度为88%的PVA,因为它的水溶性最好,不管在冷水还是在热水中它都能很l夹溶解,表现出最大的溶解度,而且其水溶液的黏度异常稳定。1-3.2 PVA水溶液的制备在5 L的烧杯中加入3 400 g的去离子水,将烧杯置入恒温水浴锅中。再称取600 g的PVA粉末,边搅拌边加入盛有去离子水的烧杯中,使其在60℃的水浴中溶胀1 h。然后加热,升温到85℃并充分搅拌5 h以上,使其完全溶解,配制成质量分数为15%的PVA水溶液,常温静置脱泡,备用。1_3_3 共混纺丝液的制备将PTFE浓缩分散液与PVA水溶液按照表1 的质量配比进行共混,搅拌均匀后再加入适量的硫酸水溶液使共混纺丝液呈弱酸性,再加入一定量的硼酸以增大溶液黏度嘲,搅拌均匀后加入纺丝釜中,真空脱泡,待用。
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