相转化凝固浴对Al2O3中空纤维多孔载体微观结构的影响

无机材料学报, 2014, 29(2): 143-148. doi: 10.3724/SP.J.1077.2014.13263

相转化凝固浴对Al2O3中空纤维多孔载体微观结构的影响

1.南京工业大学化学化工学院,材料化学工程国家重点实验室,南京210009

2.南京工业大学化学化工学院,材料化学工程国家重点实验室,南京210009

3.南京工业大学化学化工学院,材料化学工程国家重点实验室,南京210009

4.南京工业大学化学化工学院,材料化学工程国家重点实验室,南京210009

基金项目: Outstanding Young Fund of Jiangsu Province(BK2012040) 中国博士后科学基金(2012M521065) National Natural Science Foundation of China(21222602,21176117) 江苏省高校自然科学研究重大项目(09KJA530002) General Financial Grant from the China Postdoctoral Science Foundation(2012M521065) 江苏省杰出青年基金(BK2012040) 江苏省六大人才高峰项目国家自然科学基金(21222602,21176117) Natural Science Foundation of the Jiangsu Higher Education Institutions(09KJA530002) “Six Top Talents” of Jiangsu Province

关键词： Al2O3载体 , 中空纤维 , 凝固浴 , 微观结构

Effect of Coagulation Bath in Phase Inversion on Microstructure of Hollow Fiber Porous Al2O3 Support

Keywords： Al2O3 support , hollow fiber , coagulation bath , microstructure

采用相转化法制备出具有非对称结构的Al2O3中空纤维多孔载体,研究了不同浓度乙醇/水溶液为内、外凝固浴条件下中空纤维载体的微观结构和性能的变化.研究结果显示,采用水为内凝固浴,随着外凝固浴中乙醇含量的提高,所制备的载体内层指状孔逐渐向外延伸且孔道变大,其三点弯曲强度呈现先增大再减小的趋势,纯水通量及N2渗透性先减小再增大;内凝固浴对中空纤维多孔载体的结构也会产生一定的影响.以无水乙醇作为内凝固浴、水为外凝固浴所制备的Al2O3中空纤维载体,其内层为海绵层,外层为指状孔,其N2渗透性约为6.85×10-5 mol/(s·m2·Pa),纯水通量约为4.5 m3/(m2·h).

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