文章摘要
热致相分离法制备聚醚醚酮中空纤维膜
Preparation of Poly (ether ether ketone) Hollow Fiber Membranes by Thermally Induced Phase Separation
  
DOI:10.16865/j.cnki.1000-7555.2018.03.024
中文关键词: 热致相分离法  聚醚醚酮  中空纤维膜  成型条件  结构
英文关键词: thermally induced phase separation method  poly (ether ether ketone)  hollow fiber membrane  forming condition  structure
基金项目:国家自然科学基金资助项目(51403133)
作者单位
陈 功,何忠臣,任红擎,徐建军,刘鹏清 四川大学高分子科学与工程学院 高分子材料工程国家重点实验室,四川 成都 610065 
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中文摘要:
      以聚醚醚酮(PEEK)、聚醚酰亚胺(PEI)为原料,采用熔融纺丝-热致相分离法成功的制备出PEEK 中空纤维膜,并详细研究了膜成型条件对膜结构与力学性能的影响,测试了PEI含量为60%的最大中空度下膜的渗透性能。结果表明,通过控制中空纤维的成型条件可以控制中空纤维膜的中空度、壁厚等结构;PEI含量高,空气层高度低,拉伸比大时纤维中空度高,壁厚小;拉伸比和空气层高度对膜孔径的影响并不大,而PEI的含量是影响膜孔径的最主要因素,当PEI含量从40%提升到60%时,孔径从6.1nm 提升到6.9nm;PEEK与PEI两者相容性好,形成双连续的海绵状孔结构;力学性能表明,PEI含量是影响力学性能的主要因素,当PEI含量从40%提升到60%时,膜强度从0.396cN/dtex降低到0.267cN/dtex。
英文摘要:
      Poly (ether ether ketone) (PEEK) hollow fiber membranes were successfully prepared by melt spinning and thermally induced phase separation using PEEK and polyether imide (PEI) as raw materials. The effect of process conditions on the structure and properties of PEEK membrane was studied in detail. The morphology and permeability of the PEEK membrane with the maximum degree of hollowness were characterized. The results show that the degree of hollowness and the wall thickness of the PEEK hollow fiber can be designed by controlling the process conditions. The high hollowness and thin wall hollow fiber result from the conditions of high PEI content, low air layer height and low tensile ratio; compared with the factors of tensile ratio and air layer height, the content of PEI has larger effect on the pore size of PEEK membrane; when the PEI content increases from 40% to 60%, the pore size is raised from 6.1 nm to 6.9 nm. The prepared PEEK membrane has bicontinuous and sponge like pore structure because PEEK has good compatibility with PEI. The content of PEI is the main factor affecting mechanical properties; when the PEI content increases from 40% to 60%, the membrane strength decreases from 0.396 cN/dtex to 0.267 cN/dtex.
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