The self-healing P(BA-co-NIAM)/ILs-rGO composites were constructed by crosslinking cation-π interaction.Graphene oxide(GO)was modified and reduced by using ionic liquid 1-allyl-3-methylimidazolium chloride(AmimCl)to obtain ionic liquid modified reduced graphene oxide(ILs-rGO).NIAM monomers were prepared using indole,N-hydroxymethacryla ammonium,and dichloromethane under a nitrogen atmosphere.Copolymer P(BA-co-NIAM)was prepared by free radical polymerization of butyl acrylate(BA)and NIAM.ILs-rGO solution was blended with P(BA-co-NIAM)solution,and flexible self-healing P(BA-co-NIAM)/ILs-rGO composites were prepared by thermopressing method.The thermal,mechanical and self-healing properties of the materials were characterized by thermogravimetric analysis and tensile testing.The results show that compared with the polymer P(BA-co-NIAM)without ILs-rGO,the tensile strength of P(BA-co-NIAM)/ILs-rGO composites increases from 0.235 MPa to 0.564 MPa,and the self-healing efficiency of elongation at break increases from 90.3％to 99.4％.The mechanical strength and self-healing properties are signifi-cantly improved.This composite material has application potential in the development of flexible wearable electronic devices and other fields.
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