摘要
用硝酸铝水解的溶胶凝胶法，在微滤α－A12O3支撑体上制备了超滤γ-Al2O3膜．考察了聚乙烯醇（PVA）对勃姆石胶体稳定性和膜制备的影响用扫描电镜、气体和液体渗透和截留分子量等实验方法，对所制备的不对称膜进行了表征在典型条件下，用该法制备的陶瓷膜的Kelvin半径约为4．8nm，其分离率为90％的截留分子量约为4000硝酸铝可以代替醇铝用于制备氧化铝超滤膜.
Boehmite sol was prepared by hydrolyzation of aluminum nitrate with ammonia and peptization with nitric acid. Polyvinyl alcohol (PVA) was used to obtain a stable sol. With the sol as precursor, ultrafiltration alumina membrane without pinhole or crack free was prepared by a sol-gel process. The membranes were investigated by X ray difFraction, scanning electron microscopy, water and nitrogen permeability, and also by molecular retention. The results show that aluminum nitrate can be alternate precursors for ultrafiltration membrane preparation.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
1999年第3期279-283,共5页
Chinese Journal of Materials Research
基金
国家自然科学基金!29631020
