Si-C-O Adhesion Promoter Layer for Metal-Polymer Bonding
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Solution Overview
Problem
Existing composite materials face challenges in achieving stable interconnections between materials with vastly different physical and chemical properties, such as metals and elastomers, due to insufficient bonding stability, particularly with adhesion promoter layers like DLC and SiO2-based coatings, which often result in delamination and reduced layer stability.
Innovation Solution
A composite material is developed with a metal or polymer substrate interconnected by an adhesion promoter layer obtained through plasma-enhanced chemical vapor deposition (PE-CVD) using a mixture of unsaturated hydrocarbons and organosilicon compounds, forming a stable and durable bond by covalent bonding, which enhances the stability and adhesion of the composite material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wet-chemical primers or binders are used to connect poorly compatible materials, then adhesion between layers is improved, but material consumption increases and ecological and economic efficiency deteriorates
Solution Approach 1:
The patent replaces wet-chemical binder application with plasma-enhanced chemical vapor deposition (PE-CVD) technology. This substitution eliminates the need for liquid binders and immersion baths, directly depositing adhesion promoter layers onto substrates through plasma activation, thereby reducing material consumption while maintaining adhesion quality
Solution Approach 2:
The patent changes the physical and chemical parameters of the adhesion promoter layer by controlling plasma process conditions (power, pressure, gas composition, temperature) to optimize layer properties such as composition, thickness, and adhesion strength, achieving reliable bonding without excessive material use
2Reliability
If adhesion promoter layers are applied by immersion bath or spray process, then bonding between layers is improved, but process complexity and material waste increase
Solution Approach 1:
The patent replaces complex wet-chemical processes (immersion baths, spray systems, drying, curing) with a single plasma-enhanced chemical vapor deposition step. This consolidation simplifies the overall process while achieving equivalent or superior bonding stability through direct plasma-phase deposition
3Reliability
If DLC layers are used as adhesion promoters, then adhesion to substrates is improved, but residual stress increases causing layer delamination
Solution Approach 1:
The patent modifies the composition and structure of the adhesion promoter layer by adjusting plasma process parameters (power density, pressure, gas composition, deposition temperature) to control the carbon layer's microstructure, reducing residual stress while maintaining adhesion strength through optimized layer density and bonding configuration
Solution Approach 2:
The patent creates a composite adhesion promoter layer with controlled composition (carbon, hydrogen, oxygen, and other elements) that combines the adhesion benefits of DLC with reduced residual stress, achieving both strong bonding and layer stability through multi-element composition optimization
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 provides a significantly more stable and adhesive connection between substrates and polymer layers, reducing delamination and improving the mechanical strength and durability of composite materials, making them suitable for applications under high mechanical loads and in aggressive environments.
Implementation Method 1
The adhesion promoter layer is obtainable by plasma-enhanced chemical vapor deposition (PE-CVD) at least partially using a mixture of precursor compounds containing an unsaturated hydrocarbon and an organosilicon compound
Implementation Method 2
plasma-enhanced chemical vapor deposition (PE-CVD) at least partially using a mixture of precursor compounds
Implementation Method 3
plasma-enhanced chemical vapor deposition (PE-CVD) at least partially using a mixture of precursor compounds containing an unsaturated hydrocarbon and an organosilicon compound
Implementation Method 4
forming a stable and durable bond by covalent bonding
Data Source
AI summary
A composite material includes: a metal substrate and a polymer layer which are directly interconnected by an adhesion promoter layer. The adhesion promoter layer is obtained by plasma-enhanced chemical vapor deposition (PE-CVD) at least partially using a mixture of precursor compounds containing an unsaturated hydrocarbon and an organosilicon compound. In an embodiment, the organosilicon compound includes a siloxane, silane, or silicate.