发明名称 |
Methods of Making Crosslinked Membranes Utilizing an Inert Gas Atmosphere |
摘要 |
Disclosed herein is a method of making a crosslinked membrane such as a crosslinked hollow fiber membrane. The method comprises (a) preparing a polyimide polymer comprising carboxylic acid functional groups from a reaction solution comprising monomers and at least one solvent; (b) treating the polyimide polymer with a diol at esterification conditions to form a monoesterified polyimide polymer; (c) forming a monoesterified polyimide membrane or dense film from the monoesterified polyimide polymer; and (d) subjecting the monoesterified polyimide membrane or dense film to transesterification conditions under a CO2 atmosphere to form a crosslinked polyimide membrane or dense film. |
申请公布号 |
US2016339397(A1) |
申请公布日期 |
2016.11.24 |
申请号 |
US201514720397 |
申请日期 |
2015.05.22 |
申请人 |
Bhuwania Nitesh;Hussain Shabbir;Chinn Daniel;Wind John;Miller Stephen |
发明人 |
Bhuwania Nitesh;Hussain Shabbir;Chinn Daniel;Wind John;Miller Stephen |
分类号 |
B01D71/64;B01D67/00;B01D69/12 |
主分类号 |
B01D71/64 |
代理机构 |
|
代理人 |
|
主权项 |
1. A method of making a crosslinked polyimide membrane or dense film:
(a) preparing a polyimide polymer comprising carboxylic acid functional groups from a reaction solution comprising monomers and at least one solvent; (b) treating the polyimide polymer with a diol at esterification conditions to form a monoesterified polyimide polymer; (c) forming a monoesterified polyimide membrane or dense film from the monoesterified polyimide polymer; and (d) subjecting the monoesterified polyimide membrane or dense film to transesterification conditions under a CO2 atmosphere to form a crosslinked polyimide membrane or dense film. |
地址 |
Richmond CA US |