Silicone Pervaporation Membrane With Anti-Peeling Support Interface
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Solution Overview
Problem
Pervaporation membranes produced by roll-to-roll processing and including a porous support are prone to separation functional layer peeling when drawn from a wound body.
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 tensile speed of 300 mm/min, between the separation functional layer and porous support, using a silicone resin and a porous support with a surface modification treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a pervaporation membrane includes a porous support to enhance strength, then the membrane strength is improved, but the separation functional layer peels off when drawn from a wound body
Solution Approach 1:
The patent applies preliminary action by conducting surface treatment on the porous support before forming the separation functional layer. Specifically, the porous support undergoes corona discharge treatment or plasma treatment to modify its surface properties in advance, creating enhanced adhesion sites that prevent peeling when the membrane is drawn from a wound body. This preliminary surface modification ensures that the separation functional layer bonds strongly to the support structure before any peeling can occur during subsequent handling.
2Reliability
If the peeling strength is increased to prevent layer separation, then the membrane integrity is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent applies parameter changes by modifying the surface energy and chemical composition parameters of the porous support through corona discharge or plasma treatment. These parameter changes in the surface properties create optimal adhesion conditions without requiring complex manufacturing equipment or multi-step processes. The surface treatment parameters (such as treatment time, power level, or plasma gas composition) are adjusted to achieve the desired peeling strength while maintaining manufacturing 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
Prevents the separation functional layer from peeling off the porous support during unwinding, ensuring membrane integrity and stability.
Implementation Method 1
One example of the 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
in terms of enhancing the strength of the pervaporation membrane, a porous support supporting the separation functional layer
Data Source
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.