THERMALLY REARRANGED POLY(BENZOXAZOLE-IMIDE) COPOLYMER HAVING CROSS-LINKED STRUCTURE, GAS SEPARATION MEMBRANE COMPRISING SAME AND PREPARATION METHOD THEREFOR
申请人:IUCF-HYU (Industry-University Cooperation
Foundation Hanyang University)
公开号:EP3070113A1
公开(公告)日:2016-09-21
The present disclosure relates to a crosslinked, thermally rearranged poly(benzoxazole-co-imide) copolymer membrane prepared simply by heat-treating a membrane prepared from an o-hydroxypolyimide copolymer having carboxylic acid groups such that thermal crosslinking and thermal rearrangement occur simultaneously or a gas separation membrane containing a crosslinked, thermally rearranged poly(benzoxazole-co-imide) copolymer having a benzoxazole group content of less than 80% in the polymer chain, prepared from transesterification crosslinking of an o-hydroxypolyimide copolymer having carboxylic acid groups and a diol-based compound followed by thermal rearrangement, and a method for preparing the same (a membrane for flue gas separation is excluded).
In accordance with the present disclosure, a crosslinked, thermally rearranged poly(benzoxazole-co-imide) copolymer membrane for gas separation can be prepared simply through heat treatment without requiring a complicated process such as chemical crosslinking, UV irradiation, etc. for forming a crosslinked structure and a gas separation membrane (a membrane for flue gas separation is excluded) prepared therefrom exhibits superior permeability and selectivity. Also, the method is applicable to commercial-scale production because the preparation process is simple.
本公开涉及一种交联的热重排聚(苯并恶唑-酰亚胺)共聚物膜,其制备方法很简单,即对由具有羧酸基团的邻羟基聚酰亚胺共聚物制备的膜进行热处理,使热交联和热重排同时发生,或者制备一种含有交联的热重排聚(苯并恶唑-酰亚胺)共聚物的气体分离膜、由具有羧酸基团的邻羟基聚酰亚胺共聚物和二元醇基化合物经酯交换交联后再进行热重排制备的聚合物链中苯并恶唑基团含量低于80%的热重排聚(苯并恶唑-酰亚胺)共聚物,以及制备该共聚物的方法(不包括用于烟气分离的膜)。
根据本公开内容,一种用于气体分离的交联热重排聚(苯并恶唑-酰亚胺)共聚物膜只需通过热处理即可制备,无需复杂的化学交联、紫外线照射等形成交联结构的过程,由此制备的气体分离膜(不包括用于烟气分离的膜)具有优异的渗透性和选择性。此外,由于制备过程简单,该方法适用于商业规模的生产。