PEG/PEI复合膜渗透汽化汽油脱硫研究(Ⅰ)制膜条件影响  

Pervaporation performance of polyethylene glycol membranes for separation of thiophene/heptane mixtures(Ⅰ) Effect of PEG/PEI composite membrane preparation condition

作　　者：陈剑[1] 李继定[1] 亓荣彬[1] 叶宏[1] 陈翠仙[1] 

机构地区：[1]清华大学化工系膜材料与工程研究中心,北京100084

出　　处：《膜科学与技术》2009年第4期39-43,共5页Membrane Science and Technology

基　　金：国家"973"项目(2003CB615701);国家自然科学基金项目(20676067;20736003);国家"863"计划项目(2007AA06Z317);教育部博士点基金(20070003130);中石化科技开发研究基金(X505002)

摘　　要：以PEI超滤膜为支撑层,PEG为复合层,制备了PEG/PEI渗透汽化FCC汽油脱硫复合膜.通过傅立叶红外光谱仪对PEG/PEI复合膜表面进行了结构分析,考察了交联前后官能团的变化.通过扫描电子显微镜分析了复合膜表面和断面的形态.将制备的复合膜应用于正庚烷和噻吩体系,首先考察了膜的溶胀性和稳定性.研究了不同聚合物PEG浓度、交联剂浓度,交联温度和交联时间对分离性能的影响,从而得到最佳制膜条件.Crosslinked PEG/PEI composite membranes were prepared by using PEI ultrafiltration membrane as the substrate and PEG dense membrane as the composite layer. The compositions of the PEG/PEI composite membranes were characterized by FTIR spectra. The morphologies of the surface and cross - section structures of the PEG/PEI composite membranes were characterized by scanning electron microscope （SEM）. The PEG/ PEI composite membranes were used in the pervaporation separation of n - heptane/thiophene mixtures. The swelling degree of the composite membrane, the effects of amount of PEG, crosslinking temperature, amount of crosslinking agent and crosslinking time, on the separation efficiency of n-heptane/thiophene mixtures were investigated, and the optimal preparation conditions of PEG/PEI membranes were determined.

关 键 词：渗透汽化 汽油脱硫 PEG/PEI复合膜 正庚烷/噻吩 

分 类 号：TE624.5[石油与天然气工程—油气加工工程]