基于TiO_(2)溶胶杂化的分子筛炭膜制备及其结构与性能  

Preparation,structure and properties of carbon molecular sieving membranes enabled by hybridization of TiO_(2) sol

作　　者：姚彦虎 杨晨 张兵[1] 吴永红[1] 王同华[2] YAO Yanhu;YANG Chen;ZHANG Bing;WU Yonghong;WANG Tonghua(School of Petrochemical Engineering,Shenyang University of Technology,Liaoyang 111003,Liaoning,China;School of Chemical Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China)

机构地区：[1]沈阳工业大学石油化工学院,辽宁辽阳111003 [2]大连理工大学化工学院,辽宁大连116024

出　　处：《化工学报》2021年第8期4418-4424,共7页CIESC Journal

基　　金：国家自然科学基金项目(21776033、21878033);辽宁省百千万人才工程项目(2018921046);辽宁省教育厅科研项目(LJGD2020002);沈阳市科技创新人才项目(RC200325)。

摘　　要：以聚酰亚胺为前体,TiO_(2)溶胶为掺杂剂,经成膜和炭化制得杂化炭膜。采用热失重、电子显微镜、X-射线衍射、红外光谱和渗透法对前体的热性能、炭膜的微观形貌、微结构、表面官能团和气体分离性进行了表征。考察了TiO_(2)溶胶用量、渗透温度和渗透压力对炭膜的结构与性能影响。结果显示,掺杂TiO_(2)溶胶显著提高了最终炭膜渗透性和选择性;采用TiO_(2)溶胶量为10%前体所制备的杂化炭膜对H_(2)、CO_(2)、O_(2)渗透性分别为1993.8、1555.6、266.9 Barrer,同时H_(2)/N_(2)、CO_(2)/N_(2)、O_(2)/N_(2)选择性分别为93.6、73.0、12.5。Using polyimide as the precursor and TiO_(2)sol as the dopant,hybrid carbon membranes were prepared through membrane formation and carbonization.The thermal property of precursor,the microscopic morphology,microstructure,surface functional groups and gas permeation of carbon membranes were characterized by thermogravimetric analysis,electron microscope,X-ray diffraction,infrared spectroscopy and permeation testing,respectively.The effects of TiO_(2)sol dosage,permeation temperature and permeation pressure on the structure and property of carbon membranes were investigated.Results show that the incorporation of TiO_(2)sol obviously improves the permeability and selectivity of final carbon membranes.For hybrid carbon membranes prepared by the precursor containing 10%TiO_(2),the permeability can respectively reach to 1993.8 Barrer for H_(2),1555.6 Barrer for CO_(2)and 266.9 Barrer for O_(2),along with the selectivity of 93.6 for H_(2)/N_(2),73.0 for CO_(2)/N_(2)and 12.5 for O_(2)/N_(2).

关 键 词：膜 气体 分离 聚酰亚胺 二氧化钛 

分 类 号：TQ028.8[化学工程]