Titanium-Resin Adhesion via Dual Etching and Electrolysis
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Solution Overview
Problem
The adhesion strength between titanium and polymer resin in titanium-polymer resin assemblies is insufficient, necessitating a method to enhance bonding and tensile strength.
Innovation Solution
A method involving pore formation steps using alkaline and acidic solutions, electrolysis, and subsequent polymer resin injection molding, with specific etching times and temperatures, to create a titanium-resin assembly with improved adhesion and tensile strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If titanium is joined with polymer resin using conventional methods, then the assembly can be manufactured, but the adhesion strength between titanium and polymer resin is insufficient
Solution Approach 1:
The patent applies preliminary action by performing surface treatment (etching and electrolysis) on the titanium substrate before joining it with the polymer resin. The etching process creates pores on the titanium surface, and the electrolysis process forms a coating layer with fine protrusions, both of which are preparatory actions that enhance adhesion strength before the actual joining operation occurs.
Solution Approach 2:
The patent utilizes porous materials by creating pores on the titanium surface through chemical etching with alkaline and acidic solutions. These pores increase the surface area and provide mechanical interlocking features that significantly improve the adhesion strength between the titanium substrate and the polymer resin.
2Strength
If the adhesion strength between titanium and polymer resin is enhanced through surface treatment, then bonding strength improves, but the manufacturing process becomes more complex
Solution Approach 1:
The patent applies parameter changes by systematically varying the concentration and composition of etching solutions (alkaline and acidic), the electrolysis conditions (voltage, time, electrolyte composition), and the injection molding parameters. These parameter optimizations enable the achievement of high tensile strength (exceeding 40 MPa) while maintaining a manageable manufacturing process.
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 method significantly enhances the adhesion strength and tensile strength of titanium-polymer resin assemblies, as demonstrated by increased tensile strength measurements and reduced helium leakage, indicating improved bonding uniformity.
Implementation Method 1
a first pore formation step of immersing a substrate containing titanium in a first solution and forming pores in the substrate by etching the same
Implementation Method 2
a second pore formation step of immersing the substrate having pores formed in the first pore formation step in a second solution and forming another pores by etching the same
Implementation Method 3
an electrolysis step of immersing the substrate that has undergone the second pore formation step in an electrolytic solution and conducting electrolysis
Data Source
AI summary
The present disclosure provides a method for preparing a titanium-resin assembly for improving the adhesion strength between a substrate containing titanium and a resin, which includes: a first pore formation step of immersing a substrate comprising titanium in a first solution and forming pores in the substrate by etching the same; a second pore formation step of immersing the substrate having pores formed in the first pore formation step in a second solution and forming another pores by etching the same; an electrolysis step of immersing the substrate that has undergone the second pore formation step in an electrolytic solution and conducting electrolysis; and a molding step of joining the substrate with a polymer resin and conducting injection molding, wherein the first solution is an alkaline solution with a pH>7 and the second solution is an acidic solution with a pH<7.