▎ 摘　　要

NOVELTY - Preparing graphene oxide-dopamine hydrochloride/sodium alginate/poly(acrylic acid-co-acrylamide) multifunctional hydrogel by one-pot in-situ free radical copolymerization method comprises carrying out in-situ self-polymerization of graphene oxide and dopamine hydrochloride to obtain graphene oxide-dopamine hydrochloride dispersion, and then carrying out opolymerization of graphene oxide-dopamine hydrochloride dispersion using acrylic acid and acrylamide as co-monomers and adding sodium alginate, and constructing a double network structure using N,N'-methylenebisacrylamide as a chemical crosslinking agent and ferric ion as a physical crosslinking agent of acrylic acid and sodium alginate, where the addition of acrylic acid, acrylamide, N,N'-methylenebisacrylamide and ferric ion to the dispersion in the form of dropwise addition. USE - The hydrogel is useful as conductive matrix material for biosensors. ADVANTAGE - The hydrogel has excellent mechanical properties, self-adhesive properties, self-healing properties and force-sensitive properties. DETAILED DESCRIPTION - Preparing graphene oxide-dopamine hydrochloride (GO-DA)/sodium alginate/poly(acrylic acid-co-acrylamide) (P(acrylic acid-co-AAm)) multifunctional hydrogel by one-pot in-situ free radical copolymerization method comprises carrying out in-situ self-polymerization of graphene oxide (GO) and dopamine hydrochloride (DA) to obtain graphene oxide-dopamine hydrochloride (GO-DA) dispersion, and then carrying out opolymerization of graphene oxide-dopamine hydrochloride dispersion using acrylic acid and acrylamide (AAm) as co-monomers and adding sodium alginate, and constructing a double network structure using N,N'-methylenebisacrylamide (MBAA) as a chemical crosslinking agent and ferric ion as a physical crosslinking agent of acrylic acid and sodium alginate,where the addition of acrylic acid, acrylamide, N,N'-methylenebisacrylamide and ferric ion to the dispersion in the form of dropwise addition. An INDEPENDENT CLAIM is also included for graphene oxide-dopamine hydrochloride/sodium alginate/ poly(acrylic acid-co-acrylamide) multifunctional hydrogel having self-adhesive, self-healing and force-sensitive properties obtained by above method.