Gas-Generating Material Adhesion via Silane Coupling
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Solution Overview
Problem
Conventional gas-generating materials for micropumps often exhibit poor adhesive properties and tend to detach from the adhered surface due to gas generation, leading to insufficient gas supply in micro flow paths.
Innovation Solution
A gas-generating material comprising a binder resin, an azo or azide compound as the gas-generating agent, and a silane coupling agent with an amino group, which improves adhesion and prevents gas leakage, allowing for increased gas generation without detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a gas-generating agent is added to a binder resin to produce a gas-generating material, then the gas generation capability is improved, but the adhesive property to the member to be adhered deteriorates
Solution Approach 1:
The patent introduces a silane coupling agent as an intermediary substance between the gas-generating material and the adhered member. This coupling agent has dual functionality: it contains hydrolyzable alkoxy groups that form strong chemical bonds with both the gas-generating material and the substrate, while also providing crosslinking sites that enhance the overall adhesive strength. This mediator resolves the contradiction by maintaining adhesive properties even when gas-generating agents are present in the binder resin.
2Strength
If the gas-generating material contains a silane coupling agent, then the adhesive property is improved, but the gas generation amount per unit time decreases
Solution Approach 1:
The patent optimizes the content ratio of the silane coupling agent to the gas-generating agent within a specific range (0.0001 to 1 part by mass per 100 parts by mass of gas-generating agent). This parameter control ensures that sufficient silane coupling agent is present to maintain adhesive properties and enable crosslinking, while preventing excessive amounts that would inhibit gas generation. The controlled parameter range resolves the contradiction between adhesion and gas generation rate.
Solution Approach 2:
The patent creates a composite material system comprising the binder resin, gas-generating agent, and silane coupling agent that work synergistically. The silane coupling agent provides crosslinking sites that form a three-dimensional network structure, creating a composite material that maintains both adhesive strength and gas generation capability. This composite approach allows the material to exhibit properties superior to the sum of its individual components.
3Quantity of substance
If the gas-generating material generates a large amount of gas, then the gas supply capability is improved, but the material detaches from the adhered surface
Solution Approach 1:
The patent employs the silane coupling agent to perform preliminary crosslinking between the gas-generating material and the adhered member before gas generation occurs. The hydrolyzable alkoxy groups of the silane coupling agent form strong chemical bonds in advance, creating a robust attachment that can withstand the mechanical stress of subsequent gas generation. This preliminary bonding action prevents detachment even when large amounts of gas are generated.
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 material ensures high adhesive and anchoring forces, preventing detachment and ensuring efficient gas supply to micro flow paths, even when gas is generated, by using an azide compound blended with a polymer having carbon-carbon double bonds and an acrylic pressure-sensitive adhesive agent.
Implementation Method 1
a silane coupling agent having an amino group
Implementation Method 2
improves adhesion and prevents gas leakage
Implementation Method 3
an azo compound or an azide compound
Implementation Method 4
light-responsive gas-generating material
Implementation Method 5
an azide compound blended with a polymer having carbon-carbon double bonds
Data Source
AI summary
Provided is a gas-generating material which exhibits a high adhesive property to a member to be adhered and which makes it possible to generate a gas in a large amount per unit time even when the gas-generating material contains a silane coupling agent. The gas-generating material according to the present invention contains: a binder resin; a gas-generating agent which is an azo compound or an azide compound; and a silane coupling agent having an amino group.