聚偏氟乙烯-氟化二氧化硅有机-无机复合膜的制备及脱硫性能  

Fabrication of Polyvinylidene Fluoride-Fluorinated Silica Organic-Inorganic Composite Membrane for SO_2 Absorption

作　　者：李颖娜[1,2,3] 李涵[1,3] 叶卉[1,3] 张玉忠[1,3] 李泓[1,3] 陈颖[4] 

机构地区：[1]天津工业大学材料科学与工程学院,天津300387 [2]唐山学院环境与化学工程系,河北唐山063000 [3]分离膜与膜过程省部共建国家重点实验室(天津工业大学),天津300387 [4]国家海洋局天津海水淡化与综合利用研究所,天津30019

出　　处：《高分子材料科学与工程》2017年第2期123-129,共7页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(50973083;51173132);国家自然科学青年基金资助项目(51503146);2013海洋公益专项项目(201305004-5);分离膜与膜过程省部共建国家重点实验室开放课题;河北省科技计划项目(13273707;16211243);河北省唐山市科技计划项目(14130238B)

摘　　要：以聚偏氟乙烯(PVDF)为基膜材料,通过溶胶凝胶-氟化法在PVDF膜表面沉淀氟化的二氧化硅纳米颗粒(fSiO_2),制备聚偏氟乙烯-氟化二氧化硅(PVDF-fSiO_2)有机-无机复合膜。通过衰减全反射傅里叶变换红外光谱、X射线光电子能谱、场发射扫描电子显微镜、接触角测定仪等对PVDF-fSiO_2复合膜进行表征,并评价其脱硫性能。结果表明,PVDFfSiO_2复合膜表面的接触角为106.9°,明显高于PVDF膜的76.4°;由于PVDF-fSiO_2复合膜的良好疏水性能和fSiO_2粒子对基膜的保护作用,随着脱硫时间的延长,PVDF-fSiO_2气-液膜接触器的脱硫率基本保持在79%左右。The polyvinylidene fluoride-fluorinated silica （PVDF-fSiO2） organic-inorganic composite membrane was prepared by deposition of the fluorinated silica （fSiO2） inorganic layer on the PVDF organic substrate. Chemical component, morphology and hydrophobicity of PVDF and PVDF-fSiO2 membranes were examined by ATR-FTIR, XPS, FE-SEM and water contact angle （CA）. The desulfurization performance of PVDF and PVDF-fSiO2 membranes was investigated. The results show that the water contact angle of PVDF-fSiO2 membrane increases to 106.9% from 76.4% of PVDF membrane. Because the deposition fSiO2 inorganic layer on PVDF-fSiO2 membrane not only increases the hydrophobicity of PVDF-fSiO2 membrane but also protects PVDF substrate from the corrosion of chemical absorbent. The PVDF-fSiO2 gas-liquid membrane contactor shows a reasonably stable desulfurization performance of 79 % throughout the 100 min operation.

关 键 词：聚偏氟乙烯 气-液膜接触器 氟化二氧化硅 脱硫 

分 类 号：TQ325.4[化学工程—合成树脂塑料工业]