Electro-Triggered Debonding Adhesive Tape With Polymer Electrolyte Bonding
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Solution Overview
Problem
Existing electro-triggered debonding adhesives suffer from low shear strength, poor reusability, and electrolyte precipitation due to low molecular weight electrolytes causing plasticization and contamination, leading to reduced adhesion and reversibility.
Innovation Solution
A reusable electro-triggered debonding adhesive tape is developed using acrylate or olefin monomers, methoxy polyethylene glycol, and functional monomers, along with specific organic solvents, tackifying resins, and crosslinking agents, which chemically bond the electrolyte to the molecular chain, preventing precipitation and enhancing shear strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If low molecular weight electrolyte (inert solvent and salt or ionic liquid) is used, then electro-triggered debonding functionality is favorable, but bulk strength of adhesive layer is reduced and shear strength decreases
Solution Approach 1:
The patent changes the molecular weight parameter of the electrolyte from low molecular weight (inert solvent and salt mixture) to high molecular weight (polymer electrolyte with Mn≥10,000). This parameter change resolves the contradiction by maintaining electro-triggered debonding functionality while preventing the excessive plasticizing effect that reduces bulk strength and shear strength.
Solution Approach 2:
The patent creates a composite adhesive system combining polymer electrolyte (methoxy polyethylene glycol or polyacrylonitrile) with adhesive resin. This composite material approach allows the system to exhibit both the electro-triggered debonding functionality of the electrolyte and the structural strength of the adhesive resin, resolving the strength-functionality contradiction.
2Ease of operation
If low molecular weight electrolyte is used, then electro-triggered debonding functionality is achieved, but electrolyte precipitates after electrification causing loss of functional components and decline in reversibility
Solution Approach 1:
The patent changes the molecular weight parameter of the electrolyte to high molecular weight (polymer electrolyte), which fundamentally alters the behavior during electrification. The high molecular weight prevents precipitation that occurs with low molecular weight electrolytes, thereby maintaining reversibility and preventing loss of functional components.
3Ease of operation
If high addition amount of inert solvent and salt is used, then electro-triggered debonding functionality is achieved, but colloidal shear strength becomes low
Solution Approach 1:
The patent changes the concentration parameter by using a polymer electrolyte with high molecular weight (Mn≥10,000) at controlled amounts (5-50 parts by weight per 100 parts adhesive resin). This parameter change eliminates the need for high addition amounts of inert solvent and salt, thereby maintaining both electro-triggered debonding functionality and colloidal shear strength.
4Ease of manufacture
If physical blending method is used to prepare adhesive, then preparation process is simple, but adhesive layer lacks structural integrity and shows poor performance
Solution Approach 1:
The patent creates a composite material system where polymer electrolyte and adhesive resin are blended in specific proportions (5-50 parts electrolyte per 100 parts resin). This composite approach maintains the simplicity of physical blending while achieving structural integrity through proper composition design, resolving the contradiction between manufacturing simplicity and performance.
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 adhesive tape exhibits superior shear strength and reusability with minimal electrolyte precipitation, maintaining adhesion and peeling force recovery ratios above 95%, with no surface contamination.
Implementation Method 1
an electrolyte, composed of molten salt alone or molten salt combined with an inert solvent, migrates towards an electrode under a drive of an electric field
Implementation Method 2
redox reactions occurring between the electrolyte and the electrode, leading to a reduction in adhesion
Implementation Method 3
This disrupts the original van der Waals forces between the adhesive resin and the electrode
Data Source
AI summary
A reusable electro-triggered debonding adhesive tape with a high shear strength and a preparation method thereof are provided, relating to the technical field of adhesive materials. It is prepared by adopting an acrylate or olefin monomer, an ester containing methoxy polyethylene glycol, an acrylic acid compound, a salt, a functional monomer, an organic solvent, a tackifying resins, etc. The electro-triggered debonding adhesive tape has most of the electrolyte chemically bonded on a molecular chain of a main adhesive, and a portion of the electrolyte is dissociated and complexed by the strong ether-oxygen bond in methoxy polyethylene glycol, instead of simple physical blending. Therefore, a large amount of electrolyte is effectively prevented from being precipitated when the electrolyte is electrified while enabling reusability.