Photocurable Ion-Exchange Membrane Composition for Homogeneous Curing
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Solution Overview
Problem
Existing methods for producing hydrogen using anion-exchange membrane water electrolysis face challenges in efficiently producing a cured ion-exchange resin and membrane, which affects the performance of hydrogen production devices.
Innovation Solution
A polymerizable composition containing a quaternary ammonium salt, a polymerizable monomer, and a hydroxy group-containing compound, along with a linear or branched alkylene glycol, is used to create a compatible mixture that can be photocured, resulting in a high-performance ion-exchange resin and membrane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a quaternary ammonium salt and polymerizable monomer are mixed for ion-exchange resin production, then the resin can be formed, but the mixture experiences phase separation and cannot be efficiently photocured
Solution Approach 1:
The patent introduces a specific hydroxy group-containing compound as an intermediary substance to mediate between the quaternary ammonium salt and polymerizable monomer. This compound acts as a compatibility agent that prevents phase separation and enables efficient photocuring of the mixture.
Solution Approach 2:
The patent specifies precise parameter ranges for the hydroxy group-containing compound (carbon number 4-15, specific structural requirements) to optimize the compatibility and curing efficiency. By controlling these chemical parameters, the mixture maintains homogeneity and cures effectively.
2Productivity
If conventional ion-exchange resin methods are used, then resin formation is achieved, but the production process is time-consuming and inefficient
Solution Approach 1:
The patent replaces conventional thermal or chemical curing mechanisms with photopolymerization initiated by light. This substitution enables rapid curing of the ion-exchange resin mixture, significantly reducing production time and improving efficiency.
Solution Approach 2:
The patent incorporates a photopolymerization initiator in the mixture that is activated by light exposure. This preliminary preparation allows the curing reaction to proceed rapidly upon illumination, reducing the overall production time.
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 composition enables efficient production of a cured ion-exchange resin and membrane, enhancing the durability and ion-exchange performance of hydrogen production devices.
Implementation Method 1
a polymerizable composition containing a quaternary ammonium salt, a polymerizable monomer, and a hydroxy group-containing compound, along with a linear or branched alkylene glycol, is used to create a compatible mixture that can be photocured
Implementation Method 2
The hydroxy group-containing compound includes at least one selected from the group consisting of a primary alcohol, a secondary alcohol, and a diol
Implementation Method 3
a compatible mixture that can be photocured, resulting in a high-performance ion-exchange resin and membrane
Implementation Method 4
an anion-exchange membrane (AEM) water electrolysis method using the AEM... The AEM is obtained by, for example, filling a porous substrate with an ion-exchange resin
Data Source
Figure 1
AI summary
Provided are: a polymerizable composition containing a quaternary ammonium salt represented by formula (I), a polymerizable monomer, a linear or branched C1-4 alkylene glycol, and at least one hydroxyl group-containing compound selected from the group consisting of a C4-15 primary alcohol, a C4-15 secondary alcohol, and a C5-15 diol which has a hydroxy group bonded to a secondary carbon atom; an ion exchange resin; an ion exchange membrane; a membrane electrode assembly; and a hydrogen production device.