Preparation and Performance Evaluation of Graphene Heating Film

To solve the problems of low graphene dispersion, uneven thermal conductivity, and the impact of porous polyurethane (PU) solutions on the environment. Natural nano cellulose is used as a dispersant to dissolve the graphene slurry to prepare a composite heating film. The screen-printing technology performs is used in-situ coating on heat-reflective cloth (lining fabrics for sportswear), and determines the heating effect and washing characteristics of the clothing by adjusting the content of the graphene slurry. The results show that natural nano-cellulose has a good dispersion effect. Graphene dispersions with different contents after the introduction of silver paste have good thermal and electrical conductivity. When the heating voltage is 8v and the graphene slurry concentration is 12.5% (wt), the surface temperature of the heating film can exceed 50 °C, and the power consumption is low, which can not only maintain long-term power supply, but solves the shortcomings of traditional polyester heating film such as uncomfortable wearing. Besides, after washing and immersing more than 50 times, it can still maintain good heating effect.