膜科学与技术

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Effects of SiO2 doping on structure and property of four-channel alumina hollow fiber

Authors： CAI Chao, ZHANG Yuting, WANG Xiaolei, GU Xuehong

Units： State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing, 210009, China

KeyWords： hollow fiber; silica; alumina; mullite

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2017,37(1):1-7

Abstract：

Four-channel α-Al2O3 hollow fibers were fabricated by phase inversion and sintering method. Effects of SiO2 doping content on structure and property of hollow fiber were investigated. The results showed that mullite-phase was formed due to the in situ reaction between SiO2 and Al2O3 at 1500 ºC and its content enlarged with the SiO2 doping content. High pure water flux and porosity of hollow fiber were achieved under high SiO2 doping content. When the SiO2 doping content was 20 mol%, the pure water flux and porosity of as-prepared hollow fiber were 18.11 m3·m-2·h-1 and 59.9 %, respectively. Further, the hollow fiber owning a porosity of 59.9 % was used as support to prepare hollow fiber NaA zeolite membrane for pervaporation of 90 wt.% ethanol/water mixture. The permeation flux of the membrane was 21.21 kg·m-2·h-1 at 75 ºC.

Funds：

国家自然科学基金(21222602, 21490585, 21176117); 国家863计划项目(2015AA03A602); 江苏省杰出青年基金项目(BK20122040); 江苏省自然科学基金青年基金项目(BK20130915); 江苏高校优势学科建设工程资助项目.

AuthorIntro：

作者简介: 蔡超(1991-), 男, 江苏张家港人, 在读硕士, 从事膜材料制备与应用. *通讯联系人

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