Premium
In situ Generation of Reticulate Micropores through Covalent Network/Polymer Nanocomposite Membranes for Reverse‐Selective Separation of Carbon Dioxide
Author(s) -
Jeon Eunkyung,
Moon SuYoung,
Bae JaeSung,
Park JiWoong
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201508367
Subject(s) - membrane , microporous material , gas separation , covalent bond , chemical engineering , polymer , nanocomposite , materials science , polyimide , covalent organic framework , polymer chemistry , synthetic membrane , porosity , chemistry , nanotechnology , organic chemistry , composite material , biochemistry , layer (electronics) , engineering
We demonstrate the synthesis of a microporous covalent‐network membrane derived from co‐continuous blends of a porogenic urea network and a polyimide (PI). We show that the urea networks in the PI matrix may be thermally rearranged while selectively expelling small molecular fragments, thereby forming a new network bearing reticular microporous molecular pathways. The porous structures enable reverse‐selective gas separation, efficiently blocking carbon dioxide to which most polymeric membranes exhibit selective permeability. The proposed method for fabricating microporous organic membranes with highly tunable porosities using a variety of chemical structures and processing parameters is facile and shows promise for the creation of new membrane‐based molecular‐separation techniques.