Preparation of Microporous Glasses by the Phase-Separation Technique and Their Salt-Rejection Characteristics

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J. Korean Ceram. Soc. > Volume 23(5); 1986 > Article

Journal of the Korean Ceramic Society 1986;23(5): 93.

상분리법에 의한 다공질유리의 제조 및 탈염특성

현상훈, 김계태

연세대학교 요업공학과

Preparation of Microporous Glasses by the Phase-Separation Technique and Their Salt-Rejection Characteristics

ABSTRACT

Microporous glasses were prepared from the 50 $SiO_2-44$ $B_2O_3-6$ $Na_2O$(wt%) parent glass by the phase eparation technique and were characterized by SEM, BET, and Gas Adsorption methods to investigate the possiblity of their use as salt-rejection membranes for reverse osmosis. The conditions of the phase separation for the possible glass membranes were optimized for the given parent glass. The temperature and duration of heat-treatment were desired to be lower(853K) and shorter (1/2~1 hr) respectively. The specific surface areas of porous glasses prepared in this study were about 80~120$m^2$/g and their pore size distribution had a unimodal shape(peak pore radius less than 15$AA$) It was suggested that the porous glass obtained in this work could be effective for salt-rejection in point of pore size distributions but the way to increase its surface area for the high flux must be studied.