Improved surface modification of materials
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Solution Overview
Problem
The existing adhesive and composite materials often exhibit insufficient bonding strength at interfaces between different materials, limiting their use in applications such as automotive, aircraft, and electronic devices.
Innovation Solution
A surface modification method involving oxidation treatment and subsequent surface coating of materials to enhance interfacial adhesion, specifically increasing the (C—O bonds)/(total carbon bonds) percentage and O/C atomic ratio within a 10 nm depth, as measured by X-ray photoelectron spectroscopy, to improve bonding strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If adhesive materials or composite materials are formed by integrating different materials, then product functionality is improved, but bonding strength at interfaces becomes insufficient
Solution Approach 1:
The patent applies local quality by performing oxidation treatment specifically on the surface of materials to create a localized modified layer with different properties (higher O/C ratio and C-O bonds) than the bulk material. This localized surface modification enhances interfacial adhesion without changing the overall material composition or properties, thereby maintaining product functionality while improving bonding strength at the interface.
Solution Approach 2:
The patent changes the chemical composition parameters of the material surface through oxidation treatment, specifically increasing the O/C atomic ratio and the percentage of C-O bonds within the surface layer. By controlling these chemical parameters at the interface, the patent achieves improved bonding strength between different materials while preserving the base material's functional properties.
2Strength
If oxidation treatment is performed to increase (C—O bonds)/(total carbon bonds) percentage, then interfacial adhesion is improved, but measurement precision requirements increase
Solution Approach 1:
The patent establishes a feedback mechanism by using XPS measurement to quantify the oxidation level (O/C ratio and C-O bonds percentage) and correlating it with bonding strength outcomes. The patent specifies target ranges (O/C ratio of 0.03-0.20 or increase of 1-20%, C-O bonds of 5-15%) that provide clear feedback criteria for optimizing oxidation treatment conditions to achieve desired interfacial adhesion.
3Strength
If surface coating is applied to oxidation treated material, then bonding strength is enhanced, but manufacturing complexity increases
Solution Approach 1:
The patent applies preliminary action by performing oxidation treatment on the material surface before the surface coating step. This preliminary oxidation creates a reactive surface layer that facilitates better adhesion of subsequent coating layers or bonding partners, thereby enhancing the overall bonding strength while organizing the manufacturing process in a logical sequence that manages complexity.
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
This method results in high-strength adhesive and composite materials with improved shear strength and bending strength, exceeding previous benchmarks by 200 N and 1.2 times respectively, without significant material weight increase.
Implementation Method 1
the step of oxidizing the material, wherein the oxidation treatment is performed such that the (C—O bonds)/(total carbon bonds) % within a depth of 10 nm of the surface of the material as measured by X-ray photoelectron spectroscopy (XPS) increases by about 1 to 20% from before the oxidation treatment
Data Source
AI summary
The present disclosure provides for improved material surface modification. In one aspect, the present disclosure provides a method of surface modifying a material, the method comprising the steps of (1) oxidizing the material such that the oxidation level of the surface of the material is in a specific numerical range when measured by X-ray photoelectron spectroscopy (XPS), (2) (A) grafting the oxidized material and/or (B) coating the oxidized material with a hydrophilic polymer. In one aspect, the present disclosure provides a method of producing a fiber composite material in which the fiber material is contained within the second material, the method comprising the steps of (1) oxidizing at least one of the fiber material and the second material, (2) interface adhering or bonding the fiber material and the second material after the oxidizing step (3) melting the second material to obtain the fiber composite material.