▎ 摘　　要

NOVELTY - Preparing self-repairing hydrogel based on Janus nanomaterials comprises (i) esterifying graphene oxide (GO) and acrylic acid (AA) to obtain surface-functionalized nanosheets ( GO-AA), reacting graphene oxide, acrylic acid, 4-dimethylaminopyridine (DMAP), dimethylformamide, dicyclohexylcarbodiimide centrifuging, freeze-drying, adding graphene oxide, acrylic acid, 4-dimethylaminopyridine, dimethylformamide and dicyclohexylcarbodiimide in a the mass ratio of 0.1-1:0.1-1: 0.005-0.05:1-10:0.1-2 at 10-50 degrees C; and (ii) adding Janus nanocomposite to self-repairing hydrogel graphene oxide-PPy/PDMAEMA Janus NS obtained in (i) with acrylic acid, water, potassium persulfate and ferric chloride hexahydrate by self-repairing hydrogel, where the mass ratio of acrylic acid, water, ferric chloride hexahydrate, potassium persulfate, graphene oxide-PPy/PDMAEMA Janus NS is 1:1-10:0.1-10:1-10:1-10 at 20-45 degrees C for 1-5 hours. USE - The method is useful to design Janus nanocomposite self-repairing hydrogel with autonomous, fast repairing ability and high mechanical strength at room temperature (claimed). ADVANTAGE - The hydrogel is useful for potential application prospects in the field of human motion detection. DETAILED DESCRIPTION - Preparing self-repairing hydrogel based on Janus nanomaterials comprises (i) esterifying graphene oxide (GO) and acrylic acid (AA) to obtain surface-functionalized nanosheets ( GO-AA), reacting graphene oxide, acrylic acid, 4-dimethylaminopyridine (DMAP), dimethylformamide, dicyclohexylcarbodiimide centrifuging, freeze-drying, adding graphene oxide, acrylic acid, 4-dimethylaminopyridine, dimethylformamide and dicyclohexylcarbodiimide in a the mass ratio of 0.1-1:0.1-1: 0.005-0.05:1-10:0.1-2 at 10-50 degrees C, and the stirring speed of 100-500 revolutions/minute for 12-36 hours, grafting polypyrrole (PPy) on the inside of graphene oxide nanosheets by pickering emulsion to obtain nanomaterials (graphene oxide-PPyJanus NS), reacting graphene oxide-acrylic acid, distilled water, toluene, pyrrole, and ferric chloride and centrifuging and freeze-drying, adding graphene oxide-acrylic acid, distilled water, toluene, pyrrole, ferric trichloride in to the mass ratio of 0.1-1:100-1000:20-200:0.1-10:0.01-0.5, reacting at 25 degrees C at the stirring speed of 100-500 revolutions/minute for 30-120 minutes, grafting graphene oxide-PPy Janus NS obtained by the above reaction with polydimethylaminoethyl methacrylate (PDMAEMA) under the environment of potassium persulfate (KPS) solution to obtain Janus nanocomposite materials (GO-PPy/PDMAEMA Janus NS), reacting graphene oxide-PPy Janus NS, potassium persulfate and dimethylaminoethyl methacrylate (DMAEMA), centrifuging and freeze-drying, adding graphene oxide-PPy Janus NS, potassium persulfate, dimethylaminoethyl methacrylate into the mass ratio of 0.1-1:0.01-0.1:0.001-0.01 at 20-100 degrees C, the stirring speed of 100-500 revolutions/minute for 1-3 hours; and (ii) adding Janus nanocomposite to self-repairing hydrogel graphene oxide-PPy/PDMAEMA Janus NS obtained in (i) with acrylic acid, water, potassium persulfate and ferric chloride hexahydrate by self-repairing hydrogel, where the mass ratio of acrylic acid, water, ferric chloride hexahydrate, potassium persulfate, graphene oxide-PPy/PDMAEMA Janus NS is 1:1-10:0.1-10:1-10:1-10 at 20-45 degrees C for 1-5 hours.