Double-Polymer Adaptable Self-Assembled Graphene Oxide/H-Bn Sponges for Lubricating Behavior and Thermal Management

In this work, a novel three-dimensional (3D) composite (GBS) based on melamine foam is fabricated by layer-by-layer self-assembly of positively charged hexagonal boron nitride ( h -BN) and negatively charged graphene oxide (GO) nanosheets. Improved tribological and thermal management performance are achieved by combing GBS with two different polymers (thermosetting epoxy and phase-reversible paraffin wax). First, the 3D-structure GBS not only solves the problem of the dispersion of additives in the epoxy but also significantly reduces the friction coefficient of 0.15 and wear rate (2.3 [[EQUATION]] ), as well as improves the thermal conductivity (1.48 W/(m [[EQUATION]] k), with a corresponding thermal conductivity enhancement of 1039.16%). Second, the compressed GO/ h -BN sponge is immersed in phase-changeable paraffin to fabricate the thermal management film, which effectively transfers and releases heat to cool the heat-generating components through ternary synergistic effect. Fascinatingly, the composite film also presents excellent self-lubricating and wear-resistance properties, contributing to improved durability in practical applications. In summary, the study and mechanism analysis of tribological performance and thermal management based on two polymers can help solve the heat transfer and packaging problems of integrated circuits and electronic devices in the future