Tuning sol size to optimize organosilica membranes for gas separation

查看全文 作　　者：Huating [1]Song;Yibin [1,2]Wei;Chenying [1]Wang;Shuaifei [2]Zhao;Hong [1]Qi

机构地区：[1]State Key Laboratory of Material-Oriented Chemical Engineering,Membrane Science and Technology Research Center,Nanjing Tech University;[2]Department of Environmental Sciences,Macquarie University

出　　处：《Chinese Journal of Chemical Engineering》索引2018年第26卷第1期,共7页

基　　金：Supported by the National Natural Science Foundation of China(21276123,21490581);the National High Technology Research and Development Program of China(2012AA03A606);the 'Summit of the Six Top Talents' Program of Jiangsu Province(2011-XCL-021);the Open Research Fund Program of Collaborative Innovation Center of Membrane Separation and Water Treatment(2016YB01) 摘　　要：A series of organosilica sols are prepared by the polymeric sol–gel method using 1,2-bis(triethoxysilyl)ethane(BTESE)as the precursor.Particle size distributions of the BTESE-derived sols are systematically investigated by carefully adjusting the synthesis parameters(i.e.,water ratios,acid ratios and solvent ratios)in the sol process.In certain conditions,increasing the water ratio or the acid ratio tends to cause larger sol sizes and bimodal particle size distributions.However,higher solvent ratios lead to smaller sol sizes and unimodal particle size distributions.The organosilica membranes prepared from the optimized sols show excellent H_2 permeances(up to 4.2×10^(-7)mol·m^(-2)·s^(-1)·Pa^(-1))and gas permselectitivies(H_2/CO_2 is 9.5,H_2/N_2 is 50 and H_2/CH_4 is 68).This study offers significant insights into the relationship between the sol synthesis parameters,sol sizes and membrane performance. 关键词：尺寸分布音阶优化分离煤气参数系统粒子尺寸比率

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Tuning sol size to optimize organosilica membranes for gas separation

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