Cationic Polyether Composition for Cross-Linked Gas Separation Membranes
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Solution Overview
Problem
Conventional polyether compounds with cationic groups face challenges in shape retention and difficulty in fixing to other polymers, limiting their use in gas separation membranes.
Innovation Solution
A polyether compound with cationic groups and two or more chain end groups, preferably hydroxyl or azide groups, allowing fixation to other polymers through cross-linking, enhancing shape retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polyether compound having a cationic group is used as an ion conductive film, then ionic conductivity is achieved, but shape retention is inferior
Solution Approach 1:
The patent combines a polyether compound with cationic groups with polymers having specific functional groups (carboxyl, hydroxyl, amine, or isocyanate groups) to create a composite ion conductive film. This composite structure allows the polyether component to provide ionic conductivity while the polymer component provides shape stability and retention, resolving the contradiction between achieving ionic conductivity and maintaining shape retention.
2Reliability
If conventional polyether compounds with cationic groups are used, then ion conductive properties are obtained, but difficulty in fixing to other polymers occurs
Solution Approach 1:
The patent introduces specific functional groups (carboxyl, hydroxyl, amine, or isocyanate groups) at localized positions on the polyether compound molecules. These functional groups are specifically positioned to enable chemical bonding and fixation with other polymers, while the rest of the polyether structure maintains its ion conductive properties. This localized functionalization resolves the contradiction between maintaining ion conductive properties and enabling easy fixation to other polymers.
3Productivity
If base polymer is obtained by ring-opening polymerization with conventional catalysts, then polymerization is achieved, but restriction on end group types occurs
Solution Approach 1:
The patent changes the chemical parameters of the catalyst system by selecting specific catalysts that leave desired functional groups (carboxyl, hydroxyl, amine, or isocyanate groups) at the polymer chain ends. By carefully selecting catalysts with specific properties and controlling polymerization conditions, the patent achieves both efficient polymerization and the introduction of specific end groups that enable subsequent fixation reactions with other polymers, resolving the contradiction between polymerization efficiency and end group versatility.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The polyether compound can be effectively integrated with other polymers to form gas separation membranes with improved shape retention and performance.
Implementation Method 1
A polyether compound with cationic groups and two or more chain end groups, preferably hydroxyl or azide groups, allowing fixation to other polymers through cross-linking
Data Source
AI summary
A polyether compound having a cationic group and two or more chain end groups and, wherein all of the chain end groups are any of a hydroxyl group and an azide group is provided.