▎ 摘　　要

NOVELTY - Preparation of pH-responsive graphene/polymer nano hybrid materials involves dispersing graphene oxide in solvent A; adding dehydrating agent B; dissolving reversible addition fragmentation chain transfer (RAFT) agent C in solvent A; dripping solution into reactor; reacting at 5-40 degrees C for 20-72 hours; centrifuging; drying at 30-60 degrees C for 10-48 hours to obtain graphene oxide RAFT chain transfer agent; dispersing RAFT chain transfer agent in solvent D; and reacting with monomer methyl methacrylate-N,N-diethylaminoethyl methacrylate and azobisisobutyronitrile initiator. USE - Preparation of graphene/polymer nano hybrid materials used for biological sensors or smart nano materials, or as controlled release drug carrier. ADVANTAGE - The method produces pH-responsive graphene/polymer nano hybrid materials with improved dispersibility in water. It has simple and easy preparation and suitable for industrial production. DETAILED DESCRIPTION - Preparation of pH-responsive graphene/polymer nano hybrid materials comprises adding graphene oxide into reactor; dispersing graphene oxide in solvent A at weight to volume ratio of 1:(80-200); adding 1-10 times amount of dehydrating agent B based on graphene oxide surface hydroxyl molar number; dissolving reversible addition fragmentation chain transfer (RAFT) agent C in solvent A, in which adding amount of chain transfer agent C is 1-10 times amount of graphene oxide surface hydroxyl; dripping solution into reactor at 0-30 degrees C for 20-60 minutes; reacting at 5-40 degrees C for 20-72 hours; centrifuging at 5000-8000 revolutions per minute; drying at 30-60 degrees C for 10-48 hours to obtain graphene oxide RAFT chain transfer agent; dispersing RAFT chain transfer agent in solvent D at mass ratio of 1:(10-30); adding monomer methyl methacrylate-N,N-diethylaminoethyl methacrylate at mass ratio of 1:(20-60); further adding azobisisobutyronitrile initiator; reacting under protection of argon or nitrogen gas at 20-70 degrees C for 1-24 hours; centrifuging at 5000-8000 revolutions per minute for 5-30 minutes; and drying at 30-60 degrees C for 10-48 hours to obtain hybrid materials.