An asymmetric membrane including a crosslinked polyimide resin, the crosslinked polyimide resin being formed by crosslinking a polyimide resin by a crosslinking agent; the polyimide resin including a structural unit (A) derived from tetracarboxylic dianhydride and a structural unit (B) derived from diamine; the structural unit (A) including a structural unit (A-1) derived from a compound represented by Formula (a-1); the structural unit (B) including a structural unit (B-1) derived from Formula (b-1), and a proportion of the structural unit (B-1) per 100 mol % of the structural unit (B) being from 0.1 to 50 mol %; and the crosslinking agent being a compound having not less than two functional groups that bond with carboxy groups.
In Formula (b-1), Q1 and Q2 are each independently a group including an aromatic group, an aliphatic hydrocarbon group, and/or an alicyclic hydrocarbon group; X is a single bond or a particular group.
一种不对称膜,包括交联聚
酰亚胺树脂,所述交联聚
酰亚胺树脂是通过
交联剂交联聚
酰亚胺树脂形成的;所述聚
酰亚胺树脂包括衍生自四
羧酸二酐的结构单元(A)和衍生自二胺的结构单元(B);结构单元(A)包括由式(A-1)表示的化合物衍生的结构单元(A-1);结构单元(B)包括由式(b-1)衍生的结构单元(B-1),结构单元(B-1)占结构单元(B)的比例为 0.1至50摩尔%;
交联剂为具有不少于两个与羧基键合的官能团的化合物。
在式 (b-1) 中,Q1 和 Q2 各自独立地为一个基团,包括芳香基团、脂肪族烃基团和/或脂环族烃基团;X 为单键或特定基团。