▎ 摘　　要

NOVELTY - A nanocomposite comprises polyacrylic acid-grafted graphene oxide. USE - Nanocomposite is useful as protein carrier for delivering protein. ADVANTAGE - The nanocomposite doesn't degenerate protein. The protein carrier exhibits hydrophilicity in intestine. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) protein carrier, which contain the nanocomposite; and (2) manufacture of nanocomposite, which involves using polar organic solvent, graphene oxide, polyacrylic acid, catalyst, surfactant and non-polar solvent.