Preparation of side-chained sulfonated polyimide of which main chain contains quinoxaline perssad and application of side-chained sulfonated polyimide
A technology of sulfonated polyimide and sulfonated polyimide copolymer, which is applied in the preparation of proton exchange membranes and the preparation of side chain type sulfonated polyimides, can solve the problem that is not conducive to enhancing the flexibility of polymer chains and other problems, to achieve good hydrolytic stability, high proton conductivity, high molecular weight effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0044] The present invention also proposes a preparation method of a side chain type sulfonated polyimide whose main chain contains a quinoxaline group, including a preparation method of a sulfonated polyimide homopolymer (y=1) and a sulfonated polyimide The preparation method of imide copolymer (0figure 1 Shown, wherein, the preparation method of described sulfonated polyimide homopolymer (y=1) comprises the following steps:
[0045] Under the protection of nitrogen, dissolve sulfonated diamine and a certain amount of organic weak base in an organic solvent, then add dianhydride monomer and a certain amount of organic weak acid in equimolar amounts to the sulfonated diamine, and heat the reaction system at 80-140°C React for 1-8h, then react at 160-220°C for 8-24h, after the reaction, lower the temperature of the system to 70-120°C, and then pour it into methanol to obtain a filamentous product, which is dried in a vacuum oven after repeated washing Dry, obtain described sulf...
Embodiment 1
[0051] Example 1: Synthesis of a side chain type sulfonated polyimide homopolymer containing a quinoxaline group in the main chain and preparation of a proton exchange membrane:
[0052] Under the protection of nitrogen and mechanical stirring, add 4-[2,3-bis(4-aminophenyl)-quinoxaline-6-oxyl]-3,4'- Disulfonate biphenyl 6.401g (10mmol), triethylamine 2.024-4.048g (20-40mmol) and m-cresol 45-115mL, preferably, the optimal addition amount in the present embodiment is respectively 3.036g (30mmol ) and 75mL. After completely dissolving, add 1,4,5,8-naphthalene tetracarboxylic dianhydride (10mmol) 2.682g and benzoic acid 1.221-3.664g (10-30mmol), preferably, the optimal addition amount in this embodiment is 2.907 g (23.8 mmol). Under the protection of nitrogen, first raise the temperature of the reaction system to 80-140°C for 1-8h, and then continue to heat up to 160-220°C for 8-24h. Preferably, the two temperatures in this example are 100°C and 180°C respectively. ℃, the two t...
Embodiment 2
[0054] Embodiment 2: the preparation of a kind of main chain type sulfonated polyimide copolymer of side chain type sulfonated polyimide containing quinoxaline group and the preparation of proton exchange membrane:
[0055] Under the protection of nitrogen and mechanical stirring, add 4-[2,3-bis(4-aminophenyl)-quinoxaline-6-oxyl]-3,4'- Disulfonic acid biphenyl 3.201g (5mmol), the optimal addition amount of triethylamine in the present embodiment is respectively 1.619g (16mmol), m-cresol is 60mL. After dissolving completely, add 4,4'-diaminodiphenyl ether 1.001g (5mmol), 1,4,5,8-naphthalene tetracarboxylic dianhydride 2.682g (10 mmol), the maximum amount of benzoic acid in the present embodiment The optimum dosage is 2.198g (18mmol).
[0056] All the other experimental procedures were the same as in Example 1.
[0057] The preparation method of the proton exchange membrane is the same as in Example 1.
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com