摘要
从无机铝盐出发,采用原位造粒技术,在自制的圆板状α-Al2O3载体表面上成膜,研究了原位造粒成膜的一些影响因素,并与溶胶-凝胶法以乙醇铝制备的载体γ-Al2O3膜进行了孔结构、表面状态和气体渗透性等性能和成膜机理的比较.结果表明:原位造粒法从无机铝盐出发可以制备具有微孔结构无针孔的γ-Al2O3膜.而且,具有如下优良品性:(1)膜的厚度薄而均匀、完好率大,膜厚度可控制在~1μm的水平,比乙醇铝水解溶胶-凝胶法制得的膜厚度~5μm薄得多;(2)具有良好的气体渗透性能,在保持基本相同的分离因子增量的情况下,其渗透率的减少量比乙醇铝水解溶胶-凝胶法的少得多;(3)在载体表面的微孔口原位造粒,粘着性好,不易脱落,而且粒径和孔径的大小可以通过浸渍时间及氨处理来调节等.
The size distribution of active pores in γ Al 2O 3 asymmetric ultrafiltration membrane has been determined by a modified permporometry according to the mechanism of capillary condensation. The influences of cyclohexane and carbon tetrachloride as adsorbates on the determined results have been investigated. The pore size distribution of the alumina membrane corrected for t layer thickness is very narrow and agrees very well with each other.
出处
《膜科学与技术》
CAS
CSCD
1996年第4期28-31,67,共5页
Membrane Science and Technology
基金
国家重点科学基金
关键词
氧化铝膜
膜分离
溶胶凝胶法
陶瓷膜
合成
ultrafiltration pore size distribution inorganic membrane capillary condensation gas permeation