有机硅烷交联PDMS/陶瓷复合膜的制备及渗透汽化汽油脱硫性能  

Fabrication of aminosilane crosslinked PDMS/ceramic composite membranes for pervaporative desulfurization of gasoline

作　　者：徐荣[1] 邹琳[1] 张琪[1] 钟璟[1] 

机构地区：[1]常州大学石油化工学院,江苏省绿色催化材料与技术重点实验室,江苏常州213164

出　　处：《化工进展》2016年第10期3331-3336,共6页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(21406018,21276029);江苏省高校自然科学研究面上项目(15KJB530001);常州大学、江苏省先进催化与绿色制造协同创新中心及常州大学科研启动基金(ZMF14020054)项目

摘　　要：采用有机硅烷γ-氨丙基三甲氧基硅氧烷(APTMS),对聚二甲基硅氧烷(PDMS)进行交联改性,以Zr O2/Al2O3陶瓷复合膜为支撑体,制备了一系列有机硅烷交联的PDMS/陶瓷复合膜。通过扫描电镜(SEM)、傅里叶红外光谱(FTIR)、热重分析(TGA)对改性效果和膜结构进行了表征。将所制备的PDMS/陶瓷复合膜应用于渗透汽化脱除模拟汽油中的有机硫化物(噻吩),考察了交联剂APTMS含量、操作温度、料液含硫量等因素对复合膜渗透汽化脱硫性能的影响。实验结果表明,有机硅烷交联的PDMS膜相比于传统正硅酸乙酯(TEOS)交联的PDMS膜,通量和硫富集因子均有所提高。随着进料温度和原料液中硫含量的升高,膜的渗透通量均增大,而硫富集因子均减小。当APTMS质量分数为15%、进料温度为25℃、噻吩质量浓度为100mg/kg时,渗透通量为0.46kg/(m2·h),硫富集因子达到3.5。A series of aminosilane crosslinked PDMS/ceramic composite membranes were prepared using γ-aminopropyltrimethoxysilane（APTMS）as the crosslinking agent and Zr O2/Al2O3 membranes as the support. The APTMS crosslinked PDMS/ceramic composite membranes were characterized by scanning electron microscopy（SEM）,Fourier transform infrared spectroscopy（FTIR）and thermal gravimetric analysis（TGA）. The prepared membranes were applied to pervaporative removal of organosulfur compounds（thiophene）from model gasoline. The effects of operational variables such as APTMS content,operating temperature and feed sulfur content on desulfurization performances of the membrane were investigated. Compared with conventional PDMS membrane crosslinked by TEOS,the APTMS crosslinked PDMS membrane exhibited a higher permeation flux and a higher sulfur enrichment factor in pervaporative desulfurization. In addition,the permeation flux increased whereas the sulfur enrichment factor decreased as the feed temperature or the feed sulfur content increased. Themodified PDMS/ceramic composite membrane with an optimum APTMS content of 15% exhibited a permeation flux of 0.46kg/（m2·h） and a sulfur enrichment factor of 3.5 at 25℃ and a feed thiophene concentration of 100mg/kg.

关 键 词：聚二甲基硅氧烷 脱硫 渗透汽化 有机硅烷 

分 类 号：TQ028.8[化学工程]