摘要
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)。
Al2O3 hollow fiber porous supports with asymmetric structures were prepared by phase inversion method. The effects of ethanol/water solution with different contents as internal and external coagulation baths on the micro- structure and performance of as-synthesized hollow fiber supports were investigated. The results indicated that the finger-like voids on inner side of support extended outwards and the pore size increased as well with the increasing of ethanol content in external coagulation bath when using water as internal coagulation bath. The three-point bending strength of the support increased firstly and then decreased, meanwhile pure water flux and N2 permeance decreased firstly and then increased. The internal coagulation also had an effect on the structure of hollow fiber porous supports. When using ethanol and water as internal and external coagulation baths, respectively, the as-synthesized hollow fiber supports possessed sponge-like layer on inner side and finger-like voids on outer side. The N2 permeance and pure water flux were about 6.85x 10.5 mol/（s.m2.pa） and 4.5 m3/（m2.h） for the hollow fiber supports.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2014年第2期143-148,共6页
Journal of Inorganic Materials
基金
国家自然科学基金(21222602
21176117)
江苏省杰出青年基金(BK2012040)
江苏省六大人才高峰项目
江苏省高校自然科学研究重大项目(09KJA530002)
中国博士后科学基金(2012M521065)~~
