▎ 摘　　要

NOVELTY - A graphene oxide-modified betaine-type Zwitterionic compound (I) is new. USE - New graphene oxide-modified betaine-type Zwitterionic compound used for adhesion on medical device and tissue engineering supports. ADVANTAGE - The new graphene oxide-modified betaine-type Zwitterionic compound has excellent biocompatibility and high selectivity, and is prepared simple method. DETAILED DESCRIPTION - A graphene oxide-modified betaine-type Zwitterionic compound of formula (I) is new. R1=H or 1-6C alkyl; R2,R3=H, alkyl or aryl; R4=1-4C linear alkyl; A-=SO3- or COO-; L1=-C(=O)-O-(CH2)n- or -C(=O)-NH-(CH2)n-; L2=-(CH2)n-;and n=1-20. An INDEPENDENT CLAIM is included for preparation of graphene oxide-modified betaine-type Zwitterionic compound (I).