Graphene-based polymer composites in thermal management: materials, structures and applications.

Area of Science:

• Materials Science
• Nanotechnology
• Polymer Science

Background:

• Graphene's exceptional thermal conductivity (k), mechanical strength, and stability make it ideal for advanced materials.
• Significant challenges exist in creating graphene-based polymer nanocomposites (GPNs) with sufficiently high thermal conductivity for effective heat dissipation.

Purpose of the Study:

• To investigate the impact of graphene material and structure on the thermal properties of GPNs.
• To review strategies for enhancing thermal conductivity in GPNs at both microscopic and macroscopic levels.
• To discuss current applications and future directions for GPNs in thermal management.

Main Methods:

• Analysis of graphene's intrinsic thermal conductivity influenced by structural parameters.
• Review of macroscopic techniques for creating thermal conductivity pathways: filler hybridization, 3D networks, and alignment strategies (horizontal/vertical).
• Discussion of GPN applications including thermal interface materials (TIMs), phase change materials (PCMs), and smart responsive materials.

Main Results:

• Graphene structure significantly affects intrinsic thermal conductivity.
• Various macroscopic approaches offer distinct advantages and disadvantages for enhancing composite thermal conductivity.
• GPNs show promise in diverse thermal management applications.

Conclusions:

• A comprehensive understanding of graphene structure-property relationships is key to optimizing GPN thermal performance.
• Advanced composite designs and alignment techniques are crucial for maximizing heat dissipation.
• Further research into GPNs is essential for next-generation thermal management solutions.