Abstract
We fabricated graphene-thermopolyurethane (G-TPU) flexible conductive film by a blending method and systematically investigated the electrical, thermal and self-healing properties of the G-TPU flexible conductive film by infrared light and electricity. The experimental results demonstrate that the G-TPU composite films have good conductivity and thermal conductivity in the appropriate mass content of graphene in the composite film. The composite films have the good electro-thermal and infrared light thermal response performances and electro-thermal response performance is closely related to the mass content of graphene in the composite film, but the infrared light thermal response performance is not. The scratch on the composite film can be completely healed, using electricity or infrared light. The healing efficiency of the composite film healed using infrared light is higher than that of using the electricity, while the healing time of the composite film is shorter. Regardless of the self-healing method, the temperature of the self-healing is a very important factor. The self-healing conductive composite film still exhibits a good conductivity.
Highlights
Thermoplastic polyurethane (TPU) films have been used widely in many fields, such as electronics, medical treatment, food and other industries
The previous research work, relating to the PU composites filled with graphene, mainly focus on the effect of morphology and mass content of graphene, preparation method of graphene, and PU composites on polyurethane properties [5,6,30,31,32,33,34,35]
The initial concentration of the TPU solution affects the viscosity of the solution, which affect the dispersion of graphene powders in the TPU solution, thereby, affecting the performance of the G-TPU composite film
Summary
Thermoplastic polyurethane (TPU) films have been used widely in many fields, such as electronics, medical treatment, food and other industries This is largely due to their excellent comprehensive properties, such as high strength, high toughness, abrasion resistance and oil resistance, and good processing performance [1,2,3,4]. They are susceptible to failure arising from micro-cracks generated on the surface and inside inner layer during processing and utilization, which lead to a sharp decrease in their sustainability, safety, and lifetime [5,6,7,8,9]. We fabricated graphene-thermopolyurethane (G-TPU) flexible conductive film and systematically investigated the electrical and thermal and self-healing properties of G-TPU flexible conductive film
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