Composite Fluorinated Ion-Exchange Membrane for Clean Continuous Production
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Solution Overview
Problem
The preparation process of fluorine-containing proton exchange membranes is complex, prone to pollution from release agents, and difficult to produce continuously, limiting their commercialization and efficiency.
Innovation Solution
A composite membrane comprising multiple layers of microporous reinforced membranes filled with fluorine-containing proton or ion exchange resin, with a special release membrane made from engineering plastics, eliminating the need for release agents and allowing for high-speed continuous production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional cast coating method with release agents is used to prepare fluorine-containing proton exchange membranes, then the membrane can be produced, but the process is complex and prone to release agent pollution
Solution Approach 1:
The invention extracts and removes the release agent from the system by using a release-free mold directly. The mold surface is treated to have inherent release properties without requiring additional release agents, thus eliminating the source of pollution and simplifying the process.
Solution Approach 2:
The invention introduces a special mold surface treatment as an intermediary between the resin solution and the mold. This treated surface acts as a mediator that prevents adhesion without requiring release agents, solving the contradiction between cleanliness and process complexity.
2Productivity
If traditional batch production method is used for proton exchange membranes, then the membrane quality can be controlled, but the production efficiency is low and cost is high
Solution Approach 1:
The invention enables continuous production by using a conveyor belt system to transport multiple molds simultaneously through the coating and drying process. This transforms the traditional batch process into a continuous operation, significantly improving productivity and reducing labor costs.
Solution Approach 2:
The invention segments the production process into multiple independent mold stations arranged on a conveyor belt. Each mold can be processed independently while maintaining continuous flow, allowing for efficient resource utilization and scalable production.
3Strength
If multi-layer microporous reinforced membrane structure is used, then the tensile strength and dimensional stability are enhanced, but the device structure becomes more complex
Solution Approach 1:
The invention uses composite materials by combining microporous reinforced membranes with fluorine-containing proton exchange resin. This creates a composite structure that leverages the mechanical strength of the reinforced membrane and the ionic conductivity of the resin, achieving both strength and functionality.
Solution Approach 2:
The invention incorporates microporous reinforced membranes that provide both mechanical strength and ion transport pathways. The porous structure allows for high tensile strength while maintaining proton conductivity, resolving the contradiction between strength and structural simplicity.
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 solution enhances the tensile strength, dimensional stability, and cleanliness of the membranes, enabling high-speed continuous production and reducing production costs while avoiding release agent pollution.
Implementation Method 1
The main chain of the fluorocarbon bond has a small degree of polarization, and the hydrophilic sulfonic acid or carboxylic acid group on the branched chain can absorb water molecules
Implementation Method 2
provides a channel for the protons generated by the cathode to be transported to the anode
Data Source
AI summary
A composite membrane of a special highly enhanced fluorine-containing proton or ion exchange membrane, a composite membrane electrode, a special highly enhanced fluorine-containing chlor-alkali battery membrane, a special release membrane and a preparation method thereof are provided. The composite membrane of the special highly enhanced fluorine-containing proton or ion exchange membrane comprises at least two layers of microporous reinforced membranes, where both sides of each layer of microporous reinforced membranes are filled with a fluorine-containing proton or ion exchange resin, the biaxial tensile strength of the composite membrane is greater than 40 MPa, the room temperature ionic conductivity is greater than 0.007 S/cm, the air permeability is extremely low, and the time required for 100 ml of air to pass through the composite membrane measured by Gurley densometer is more than 5 minutes.