Build a Rigid-Flexible Graphene/Silicone Interface by Embedding SiO₂ for Adhesive Application

Area of Science:

• Materials Science
• Polymer Science
• Nanotechnology

Background:

• Graphene/silicone composites often face challenges with adaptability under external stimuli.
• Improving interfacial interactions is crucial for enhancing material properties.

Purpose of the Study:

• To develop an effective strategy for enhancing graphene/silicone matrix adaptability.
• To improve the thermal and mechanical properties of graphene/silicone nanocomposites.

Main Methods:

• Embedding nanoscale silicon dioxide (SiO2) into graphene/silicone interfaces as a buffer layer.
• In situ preparation of silica-coated chemically reduced graphene (rGES).
• Integration of rGES into methyl vinyl polysiloxane followed by vulcanization.

Main Results:

• The SiO2 buffer layer improved interfacial interaction, leading to enhanced thermal and mechanical properties.
• The rGES/silicone rubber nanocomposite exhibited significantly higher tensile strength (up to 25 times), tear strength, and elongation at break compared to unmodified graphene/silicone.
• Improved thermal stability with a higher initial decomposition temperature was observed.
• Enhanced tensile shear adhesive strength for aluminum sheets was achieved.

Conclusions:

• The developed interfacial modification strategy effectively enhances the adaptability and performance of graphene/silicone nanocomposites.
• The silica buffer layer plays a critical role in improving material properties.
• The rGES/silicone rubber nanocomposite shows great potential for applications requiring high strength and thermal stability.