Silicone Pervaporation Membrane Adhesion for Roll-to-Roll Processing
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Solution Overview
Problem
Pervaporation membranes with a silicone resin separation functional layer tend to peel off the porous support when drawn from a wound body during roll-to-roll processing.
Innovation Solution
A pervaporation membrane design with a peeling strength of 0.15 N/20 mm or more, measured at a peel angle of 180° and a tensile speed of 300 mm/min, is achieved by using a silicone resin and a porous support with a surface modification treatment, optionally including a primer layer and fine porous layer, to enhance adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a pervaporation membrane is produced by roll-to-roll processing with a porous support, then the membrane structure is stable and supportive, but the separation functional layer peels off when drawn from the wound body
Solution Approach 1:
The patent applies surface modification treatment to the porous support before forming the separation functional layer. This preliminary action creates a surface with enhanced adhesion properties, ensuring that when the membrane is later drawn from the wound body, the separation functional layer remains firmly attached and does not peel off.
Solution Approach 2:
The patent introduces a primer layer as an intermediary between the porous support and the separation functional layer. This primer layer acts as a mediator that enhances the bonding interface, preventing peeling when the membrane is handled or drawn from the wound body while maintaining structural support.
2Reliability
If the peeling strength is increased to prevent layer separation, then adhesion between layers is improved, but the membrane becomes more difficult to process and handle
Solution Approach 1:
The patent optimizes the peeling strength parameter to a specific range (0.03 N/20 mm or more, preferably 0.05 N/20 mm or more, more preferably 0.1 N/20 mm or more). By controlling the peeling strength within this optimized range, the patent achieves sufficient adhesion to prevent peeling while maintaining ease of handling and processing during manufacturing and application.
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 design effectively inhibits the separation functional layer from peeling off the porous support, ensuring stability during handling and processing.
Implementation Method 1
a method for separating a volatile organic compound from an aqueous solution containing the organic compound is a pervaporation method using a pervaporation membrane
Implementation Method 2
a peeling strength measured between a separation functional layer and a porous support
Data Source
Figure 1A~1C
Figure 2A~2C
Figure 3
AI summary
The present invention provides a pervaporation membrane suitable for inhibiting a separation functional layer from peeling off a porous support when the pervaporation membrane is drawn from a wound body of the pervaporation membrane. The pervaporation membrane of the present invention includes: a separation functional layer including a silicone resin; and a porous support supporting the separation functional layer. For the pervaporation membrane, a peeling strength measured by a test below is 0.15 N/20 mm or more. Test: The pervaporation membrane is cut to 20 mm in width and 150 mm in length to give a test piece. The separation functional layer of the test piece is peeled off the porous support of the test piece at a peel angle of 180° and a tensile speed of 300 mm/min.