Improving thermal conductivity of butylpyridine latex-based composites by modified single-layer graphene

Chelated titanate (CT) modified single-layer graphene (CTMSG), exhibiting much better static and dynamic stability due to the synergy of physical and chemical bonds, was mixed with butadiene-vinylpyridine latex (BL) to prepare composite (CTMSG-BL) film to enhance its thermal conductivity. Furthermore, CTMSG-BL was complexed with polyethylene terephthalate (PET) fabric to promote the thermal conductivity of the composite (CTMSG-BL/PET). Compared with the samples without CTMSG, the thermal conductivity of CTMSG-BL (CTMSG content: 0.2 wt%) and CTMSG-BL/PET increased from 3.52 to 4.35 W/(m center dot K) and from 1.91 to 2.56 W/(m center dot K), improved by 19.1% and 34.0%. This benefits from the excellent orientation alignment of single-layer graphene (SG) in BL film and the highly efficient construction of the thermal conductivity pathway. The CTMSG-BL emulsion is suitable for preparing heat-resistant thermal conductive film with a thickness of micro-nano meter (similar to 0.6 mu m) by impregnation process because of the low viscosity of the CTMSG-BL emulsion (3.61 mPa center dot s) and the good heat resistance of the pyridine groups of BL with average pyrolysis temperature about 444 degrees C. The CTMSG-BL film and CTMSG-BL/PET composites have excellent heat conduction and dissipation properties, exhibiting broad application prospects in thermal interface materials, aerospace, and transport.