▎ 摘　　要

NOVELTY - An amino acid-modified filler is an amino acid/graphene/carbon nanotube hybrid filler, and is obtained by grafting asparaginic acid and ethylene diamine with graphene oxide and reacting with acidified carbon nanotubes. USE - Amino acid-modified filler (claimed). ADVANTAGE - The amino acid-modified filler is economical, and has high toughness. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of amino acid-modified filler, which involves reacting ethylene diamine-grafted graphene and acidified carbon nanotubes in mass ratio of 1:1, then adding deionized water, ultrasonically-dispersing for 40 minutes, then adding same amount of aspartic acid and predetermined amount of 4-dimethylaminopyridine at 60 degrees C for 6 hours, filtering, washing and drying.