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Hot-Press-Assisted Adhesions between Polyimide Films and Titanium Plates Utilizing Coating Layers of Silane Coupling
Mineo Hashizume1, Soichiro Fukagawa1, Shoko Mishima1
1Department of Industrial Chemistry, Faculty of Engineering and ‡Graduate School of Chemical Sciences and Technology, Tokyo University of Science , 12-1 Ichigayafunagawara-machi, Shinjuku-ku, Tokyo 162-0826, Japan.
This study introduces a sustainable adhesion technique using silane coupling agents for polymer-metal bonding. This method creates strong, water-resistant interfaces via ionic and amide bonds, crucial for eco-friendly material applications.
Area of Science:
- Materials Science
- Surface Chemistry
- Sustainable Engineering
Background:
- Developing sustainable adhesion techniques is crucial for reducing material consumption.
- Low-cost, low-material adhesion methods are needed for polymer-metal interfaces.
Purpose of the Study:
- To demonstrate silane coupling agents as effective adhesion layers for polymer-metal interfaces.
- To investigate the bonding mechanism and adhesion strength.
- To achieve water-resistant adhesion through surface modification.
Main Methods:
- Surface modification of polyimide (PI) films via alkaline hydrolysis to introduce carboxy groups.
- Treatment of titanium plates with aminosilanes to form self-assembled monolayers.
- Hot pressing of modified PI films and titanium plates to induce adhesion.
- Lap shear tests for adhesion strength evaluation.
- X-ray photoelectron spectroscopy (XPS) for surface characterization.
Main Results:
- Successful adhesion between alkaline hydrolyzed PI films and aminosilane-treated titanium plates.
- Formation of ionic and/or amide bonds at the interface, confirmed by XPS.
- Enhanced water-resistant adhesion upon activation of carboxy groups with N-hydroxysuccinimide, indicating increased amide bond formation.
Conclusions:
- Silane coupling agent layers facilitate robust adhesion at polymer-metal interfaces.
- The adhesion mechanism involves ionic and amide bond formation.
- Surface activation strategies can improve adhesion properties, particularly water resistance.
