▎ 摘　　要

NOVELTY - Preparing stretchable electric heating fabric, comprises (i) adding carbon nanotube powder into the high-concentration graphene aqueous phase dispersion liquid and fully grinding to obtain high-concentration graphene/carbon nanotube composite aqueous slurry, (ii) soaking the elastic grey fabric in a tannic acid aqueoussolution, taking out and drying to obtain a tannic acid coated fabric, (iii) uniformly coating the resultant slurry on the surface of the fabric coated with the tannic acid and then fully drying the fabric to enable the carbon nano particles to be uniformly adsorbed on the surface of the fabric fiber to form a conductive layer to obtain the fabric coated with the carbon nano particles, and (iv) soaking the resultant carbon nano-coated fabric in a waterproof coating dispersion liquid, taking out and fully drying the fabric, drying the waterproof coating absorbed on the carbon nano-coated fabric fiber surface to form a waterproof layer to obtain the final product. USE - The method is useful for preparing stretchable electric heating fabric. ADVANTAGE - The fabric: is economical, environmentally friendly and easy to large scale production; has excellent conductivity and electric heating; can keep the original ventilation gap structure and stretchability; and does not need any organic solvent. DETAILED DESCRIPTION - Preparing stretchable electric heating fabric, comprises (i) adding carbon nanotube powder into the high-concentration graphene aqueous phase dispersion liquid and fully grinding to obtain high-concentration graphene/carbon nanotube composite aqueous slurry, where the high-concentration graphene aqueous phase dispersion liquid comprises graphene, macromolecule auxiliary agent and deionized water, where the graphene concentration is 20-200 mg/ml and the mass ratio of the graphene to the macromolecule auxiliary agent is 1:5-5:1. The mass ratio of the carbon nano tube to the graphene is 1:5-5:1, the mass fraction of the high-molecular auxiliary agent in the solid content of the graphene/carbon nano tube composite aqueous slurry is 10-40 wt.%, (ii) soaking the elastic grey fabric in a tannic acid aqueous solution, taking out and drying to obtain a tannic acid coated fabric, where the mass fraction of the tannic acid aqueous solution is 0.1-90 wt.%, (iii) uniformly coating the resultant slurry on the surface of the fabric coated with the tannic acid and then fully drying the fabric to enable the carbon nano particles to be uniformly adsorbed on the surface of the fabric fiber to form a conductive layer to obtain the fabric coated with the carbon nano particles, and (iv) soaking the resultant carbon nano-coated fabric in a waterproof coating dispersion liquid, taking out and fully drying the fabric, drying the waterproof coating absorbed on the carbon nano-coated fabric fiber surface to form a waterproof layer to obtain the final product, where the content of the aqueous polyurethane in the waterproof coating dispersion liquid is 0.1-40 wt.% and the viscosity is less than 300 microPa.s.