膜科学与技术

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ClassificationCode：TQ028.3

year,volume(issue):pagination： 2020,40(1):110-116

Abstract：

The low cost and highly reproducible NaA membrane is synthesized by a novel succeeding seeding method. The present generation of NaA membrane could be obtained by the secondary growth procedure of the prior generation of dried mother liquor over α-Al2O3 tube, which is named succeeding seeding method (SSM). Firstly, various original mother liquor are obtained by altering the crystallization time of the gel, and the effect of original mother liquor on the separation performance of NaA membrane is explored. The results reveal that the NaA membrane with the crystallization time of 12.5 min shows the best pervaporation performance with the separation factor larger than 10000 and the flux of 1.25kg/m2·h for the dehydration of 90 wt.% ethanol solution at 70°C. Then, five generations of NaA membranes are synthesized in sequence by SSM under the optimal conditions above. Five generations of NaA membranes show analogous crystallinity, surface morphology and thickness, so similar pervaporation performances with the separation factor larger than 10000 and the flux of ca. 1.25 kkg/m2·h are achieved . Therefore, highly reproducible NaA membrane with good separation performance can be obtained by SSM.

Funds：

国家自然科学基金优秀青年科学基金（21622607, 21761132009）；浙江省自然科学基金杰出青年科学基金（No. LR18B060002）；浙江省“万人计划”（No. ZJWR0108011）；宁波科技创新2025重大专项计划项目（No. 2018B10016）

AuthorIntro：

第一作者简介：李贝贝（1993-），男，安徽省宿州市，硕士研究生，硕士，研究方向：分子筛膜合成，E-mail：2587342429@qq.com 通讯作者，陈晨 E-mail：chenchen@nbu.edu.cn; 李砚硕E-mail：liyanshuo@nbu.edu.cn

Reference：

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