双疏型预氧化聚丙烯腈纳米纤维膜制备及性能  

Preparation and properties of amphiphobic preoxidized polyacrylonitrile nanofiber membranes

作　　者：杜志伟 王宇 黄庆林[1,2] DU Zhiwei;WANG Yu;HUANG Qinglin(Department of Material Science and Engineering,Tiangong University,Tianjin 300387,China;State Key Laboratory of Separation Membranes and Membrane Processes,Tiangong University,Tianjin 300387,China)

机构地区：[1]天津工业大学材料科学与工程学院,天津300387 [2]天津工业大学分离膜与膜过程国家重点实验室,天津300387

出　　处：《纺织高校基础科学学报》2022年第1期115-122,共8页Basic Sciences Journal of Textile Universities

基　　金：天津市科学技术委员会创新平台专项(18PTSYJC00170)。

摘　　要：以聚丙烯腈(PAN)为成膜聚合物,采用静电纺丝技术制备PAN纳米纤维膜。通过溶胶凝胶法将纳米二氧化硅(SiO_(2))粒子(SiNPs)原位生长在PAN纳米纤维膜表面,后对所得PAN纳米纤维膜进行高温预氧化处理,得到预氧化PAN(O-PAN)纳米纤维膜。利用三甲氧基(1H,1H,2H,2H-十七氟癸基)硅烷(17-FAS)对纳米纤维膜进行表面处理,得到双疏型O-PAN纳米纤维膜。采用扫描电子显微镜(SEM)、能谱仪(EDX)等表征纳米纤维膜的微观结构形貌和表面性能。结果表明:PAN纳米纤维膜经碱处理后,表面生成大量-OH,SiNPs成功地原位生长在纤维表面,SiNPs的数量和粒径大小随着氢氧化钠(NaOH)浓度的升高和正硅酸乙酯(TEOS)浸泡时间的延长而增加,同时使得纤维膜表面粗糙度增大。所得双疏型O-PAN纳米纤维膜对水、乙二醇和煤油的静态接触角分别高达151.4°、150.2°和134.2°。PAN nanofiber membrane was prepared by electrostatic spinning using polyacrylonitrile(PAN)as fiber forming polymer.Silica(SiO_(2))nanoparticles(SiNPs)were grown on the surface of PAN nanofiber membrane by sol-gel method.Then PAN nanofiber membrane was preoxidized at high temperature to obtain preoxidized PAN(O-PAN)nanofiber membrane.Finally,the nanofiber membrane was treated with trimethoxyl(1H,1H,2H,2H-heptafluorodecyl)silane(17-Fas)to obtain the amphiphobic O-PAN nanofiber membrane.The microstructure morphology and surface properties of the nanofiber membranes were characterized by scanning electron microscopy(SEM)and energy dispersive spectrometer(EDX)and so on.The results show that a large amount of -OH was generated on the surface of PAN nanofiber membrane after alkali treatment,and SiNPs successfully grew in situ on the surface of the fiber.The number and particle size of SiNPs increased with the increase of NaOH concentration and TEOS immersion time,and the surface roughness also increased.The static contact angles of the obtained double-sparse O-PAN nanofiber membrane for water,ethylene glycol and kerosene are as high as 151.4°,150.2°and 134.2°,respectively.

关 键 词：静电纺丝 聚丙烯腈 预氧化 纳米二氧化硅粒子 双疏 

分 类 号：TQ342.3[化学工程—化纤工业]