Graphene Reinforcement in Porous Composite Materials
Summary
Graphene‐reinforced porous composites integrate two complementary design strategies to achieve lightweight, high‐performance materials. The incorporation of graphene nanoplatelets within open‐ or closed‐cell matrices offers a route to exceptional mechanical stiffness and strength at ultralow reinforcement levels, while controlled porosity delivers low density, high surface area and energy‐absorbing capacity. Advances in fabrication—such as freeze‐casting, template foaming and additive manufacturing—enable hierarchical architectures in which both the porosity gradient and the distribution of graphene can be tailored spatially. Micromechanical models, often based on modified Halpin–Tsai formulations and extended rules of mixture, predict elastic moduli and thermal conductivity as functions of porosity coefficient, filler weight fraction and filler aspect ratio. Experimental investigations have elucidated the influence of graphene dispersion and interfacial adhesion on buckling stability, vibrational response and thermo-elastic behaviour. Such multifunctional composites are under active development for structural components in aerospace and automotive sectors, thermal management substrates in electronics and scaffold materials in biomedical engineering. Remaining challenges include reproducible control of graphene alignment within graded porosities, optimisation of interfacial bonding under cyclic loading, and scalable processing routes for complex geometries.
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Technical terms
Graphene platelet: A few‐layer graphene nanosheet used as a high‐aspect‐ratio reinforcement in composite matrices.
Functionally graded material: A composite whose composition or microstructure varies continuously in space to tailor local properties.
Porosity coefficient: A parameter defining the volume fraction of voids within a porous material, influencing density and stiffness.
Halpin–Tsai model: A micromechanical formulation that estimates effective elastic moduli of composites based on filler geometry and distribution.
Micromechanics: An analytical approach linking the properties and arrangement of constituents at the microscale to macroscopic composite behaviour.
References
- Transient Thermal Stresses in FG Porous Rotating Truncated Cones Reinforced by Graphene Platelets. Applied Sciences (2022).
- Numerical Study on the Buckling Behavior of FG Porous Spherical Caps Reinforced by Graphene Platelets. Nanomaterials (2023).
- Vibrations of viscoelastic FG porous graphene-platelets reinforced doubly-curved shells via experimental characterisation of graphene platelets. Engineering Structures (2024).
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