中文摘要：

采用相转化和高温烧结相结合的方法制备四通道α-Al_2O_3中空纤维,系统考察了SiO_2掺杂含量对中空纤维结构与性能的影响.结果表明,1 500℃煅烧温度下SiO_2与Al_2O_3发生原位烧结反应生成莫来石相,且莫来石相的含量随SiO_2掺杂含量的增加而增大;SiO_2掺杂含量的增加有利于提高中空纤维的纯水通量和孔隙率,当SiO_2掺杂含量达到20%（摩尔分数）时,中空纤维的纯水通量可达18.11m3/（m2·h）,孔隙率为59.9%.选用SiO_2掺杂含量为20%的中空纤维作为载体,合成的中空纤维NaA分子筛膜用于90%（质量分数）乙醇/水渗透汽化分离,75℃下膜的渗透通量高达21.21kg/（m2·h）.

英文摘要：

Four-channel crA1203 hollow fibers were fabricated by phase inversion and sintering method. Effects of Si02 doping content on structure and property of hollow fiber were investigated. The resultsshowed that mullite-phase was formed due to the in-situ reaction between Si0 2 and A 120 3 at 1 500 〇C and its content enlarged with the Si02 doping content. High pure water f lu x and porosity of hollow fiber were achieved under high SiO2 doping content. When the Si0 2 doping content was 20 % （mole fraction ）,the purewater flux and porosity of as-prepared hollow fiber were 18. 11 m3/（m2 ？ h） and 59. 9 % ,respectively. Further, the hollow fiber owning a porosity of 59. 9 % was used as support to prepare hollow fiber NaAzeolite membrane for pervaporation of 90%（mass fraction） ethanol/water mixture. The permeation f lu x of the membrane was 21. 21 kg/ （m2 h） at 75 °C .