Construction Of Functional Fabric Blended With Graphene And Research On Electrothermal Performance

Electrothermal materials convert electricity to heat energy immediately based on Joule’s law.Due to the higher conversion efficiency,it can alleviate the environment pollution during the utilization of fossil energy.Among these,the flexibility and wearability make electrothermal textile one of the research hotspot.The electric heating efficiency and service life of the electrothermal function textile material and its surface layer is closely related to the function.And strengthen the function of electrothermal function textile material surface layer of the wear resistance and electric heating efficiency is of great significance to the application value of ascension through the construction of the special structure in the surface of the cotton fabric can be as much as possible to avoid abrasion of function layer due to the friction.The asymmetric surface modification of cotton fabric was carried out by using nano materials,such as tourmaline and graphene oxide by pressure atomization.The main research work of functional composite fabric with good electrothermal properties was as follows:In allusion to the promotion the abrasive resistance of composite functional fabric,highpressure atomization method was employed to construct a sandwich structure on the surface of cotton fabric in sequence of water-soluble polyurethane(WPU),graphene/WPU and WPU,and the electrothermal composite fabrics with favorable abrasion resistance were produced.The characterization results show that the graphene nanosheets were grafted onto the surface of cotton fabric by high-pressure atomization method.The manufactured composite fabric exhibited satisfied electrothermal property owing to the participation of tourmaline,which can reach 47.6 °C in 30 s under 10 V applied voltage.After 2500 cycles abrasion test,21.1% electrical conductivity reduction was brought out,which was much better than that of composite fabric without sandwich structure(87.0%),showing that the sandwich structure endows the electrothermal composite fabric outstanding abrasion resistance.Tourmaline exhibits permanent spontaneous polarization,electrostatic field exists around tourmaline nanoparticles.Graphene nanoplates were employed to construct the basic conductive network,and tourmaline nanoparticles chosen as a functional reinforcement material were grafted onto the surface of cotton fabric by high-pressure atomization technique,then the high efficiency electrothermal tourmaline/graphene composite functional fabric was manufactured.The electrothermal performance were recorded by infrared camera under applied voltage.The results revealed that the higher the quality fraction of tourmaline,the higher steady temperature that composite fabric can reach,that is,the better electrothermal property.Nevertheless,the electrothermal performance decreased with the excess high fraction.Herein,the tourmaline/graphene composite functional fabric reached the highest temperature of 83.8 °C under 10 V applied voltage with the tourmaline fraction of 40%.The as-obtained fabric heater was used in hand therapy,and it can increase the temperature of blood vessels temperature near the heater(1.8 °C).Hence,the tourmaline/graphene composite fabric heater performed a promising prospect in application in medical treatment,physical therapy,health protection and function protective garment.To enhance the electrothermal performance of functional fabric,nanometer-sized graphene was proposed to build conductive path,and graphene oxide nanosheets was chosen to construct insulating layer.The cotton fabric displayed excellent electrothermal performance which was finished by the two nanometer-sized material with high-pressure atomizing method.Graphene and graphene oxide nanosheets distributed uniformly onto the surface of cotton fabric.With the addition of graphene oxide,a mass of graphene oxide nanosheets grafted onto the cotton fabric increased,then the thermal insulation property became better.The electrothermal performance of graphene/graphene oxide composite functional fabric heater achieved the optimal state with the graphene oxide fraction of 5%,which can reach to 162.6 °C with the rapid temperature rising rate of 8.4 °C /s under 10 V applied voltage.