▎ 摘　　要

NOVELTY - Preparation of polyacrylic acid-modified graphene oxide nanomaterial comprises in situ atom transfer free radical polymerization reaction. USE - The method is for preparation of polyacrylic acid-modified graphene oxide nanomaterial used as drug carrier or self-separating adsorbent useful for adsorbing organic substances and dye pigment in sewage treatment (all claimed). The polyacrylic acid-modified graphene oxide nanomaterial is also used for adsorbing heavy metal materials. ADVANTAGE - The polyacrylic acid-modified graphene oxide nanomaterial has pH responsiveness by the modification of polyacrylic acid, thus, protecting the drug from gastric acid environment and enzymes, and adsorbing organic substances and dye pigment in sewage, where by changing the pH, the nanomaterial can automatically deposit to separate from the sewage.