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Microporous Polyamide Membranes for Molecular Sieving of Nitrogen from Volatile Organic Compounds
Author(s) -
Zhou Haoli,
Tao Fei,
Liu Quan,
Zong Chunxin,
Yang Wenchao,
Cao Xingzhong,
Jin Wanqin,
Xu Nanping
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201700176
Subject(s) - microporous material , membrane , barrer , gas separation , polyamide , triptycene , chemical engineering , monomer , synthetic membrane , polymer , membrane technology , cyclohexane , chemistry , materials science , permeation , polymer chemistry , organic chemistry , biochemistry , engineering
Microporous polymer membranes continue to receive tremendous attention for energy‐efficient gas separation processes owing to their high separation performances. A new network microporous polyamide membrane with good molecular‐sieving performance for the separation of N 2 from a volatile organic compound (VOC) mixture is described. Triple‐substituted triptycene was used as the main monomer to form a fisherman's net‐shaped polymer, which readily forms a composite membrane by solution casting. This membrane exhibited outstanding separation performance and good stability for the molecular‐sieving separation of N 2 over VOCs such as cyclohexane. The rejection rate of the membrane reached 99.2 % with 2098 Barrer N 2 permeability at 24 °C under 4 kPa. This approach promotes development of microporous membranes for separation of condensable gases.