推压成型工艺对PTFE初生中空纤维力学性能的影响  

Influence of Paste Extrusion Process on the Mechanical Properties of PTFE Nascent Hollow Fiber

作　　者：刘国昌[1,2] 高从堦[1] 郭春刚[2] 陈江荣[2] 李浩[2] 李晓明[2] 吕经烈[2] 

机构地区：[1]中国海洋大学化学化工学院,山东青岛266100 [2]国家海洋局天津海水淡化与综合利用研究所,天津300192

出　　处：《塑料工业》2016年第4期59-63,共5页China Plastics Industry

基　　金：中央级公益性科研院所基本科研业务费专项资金项目(K-JBYWF-2013-T1;K-JBYWF-2015-T13);2015年度海洋公益性行业科研专项经费项目(201505006);海洋经济创新发展区域示范项目(CXSF2014-34-C)

摘　　要：聚四氟乙烯（PTFE）初生中空纤维是拉伸制备PTFE中空纤维膜的先驱体，其力学性能直接影响制膜工艺和产品性能。系统考察了推压成型温度、速度和压力条件对PTFE初生纤维力学性能的影响，并通过纤维表面微观结构分析，探究其力学性能变化的内在因素。结果表明，较高的推压成型温度和压力、较低的速度，有利于制备综合力学性能较优的PTFE初生中空纤维；纤维表面树脂初级粒子纤维化是影响其力学性能的内因；相比，推压成型温度和压力变化对树脂粒子纤维化影响较大。当推压成型温度、速度和压力分别控制为50～80℃，9—15mm／min和38～42MPa时，纤维综合力学性能较好。The polytetrafiuoretyhylene （PTFE） nascent hollow fiber is the precursor for preparation of PTFE hollow fiber membrane, of which the mechanical properties have a direct effect on the film process and product performance. Factors affecting extrudates＇ mechanical properties such as extrusion temperature, extrusion rate and extrusion pressure were investigated systematically. And by surface micro-structure analysis, the internal factors of change of the mechanical properties of the fiber were explored. Results show that： PTFE nascent hollow fiber with good over-all properties benefits from the rising in extrusion temperature and pressure and the falling in extrusion rate; the fiberization of resin particles in the surface of fiber is the internal cause of the change of mechanical properties; extrusion temperature and rate affect the iberization of resin particles greatly. The fiber with good over-all properties is prepared when the extrusion temperature, rate and pressure are 50 -80 ℃, 9 -15 mm/min and 38 -42 MPa, respectively.

关 键 词：聚四氟乙烯 中空纤维 推压成型 力学性能 

分 类 号：TQ342.8[化学工程—化纤工业]