▎ 摘　　要

NOVELTY - Preparing graphene oxide for improving barium titanate/poly(lactic acid-glycolic acid)biological bracket involves growing barium titanate (BaTiO3) on the graphene oxide (GO) nano sheet by hydrothermal reaction to obtain BaTiO3-GO powder, dispersing the poly(lactic-co-glycolic acid) (PLGA) powder in absolute ethyl alcohol to obtain PLGA suspension and then dispersing the BaTiO3-GO powder to PLGA suspension obtaining BaTiO3- GO PLGA suspension, ultrasonically, magnetically stirring, centrifuging and drying, grinding to obtain the BaTiO3-GO/PLGA composite powder; the BaTiO3-GO PLGA composite powder by selective laser additive manufacturing technology to manufacture BaTiO3-GO PLGA biological bracket. USE - Method for preparing graphene oxide for improving barium titanate/poly(lactic acid-glycolic acid)biological bracket. ADVANTAGE - The method enables to prepare graphene oxide improving barium titanate/poly (lactic acid-glycolic acid) biological bracket, which solves the problem that when the PLGA bracket is directly introduced into the BaTiO3, the BaTiO3 may cause the problem of the deterioration of the piezoelectric characteristics caused by the lattice distortion caused by the oxygen vacancy, the oxygen vacancy defect of the BaTiO3 is healed by the oxygen- containing functional group of the GO, promoting the polarization capability of BaTiO3 to improve the piezoelectric performance of BaTiO3-GO in PLGA bracket, good hydrophilicity of GO and BaTiO3 makes PLGA bracket more beneficial for cell adhesion growth in the hydrothermal reaction, generating a conductive path formed by reducing graphene oxide grid, promoting effective transmission of charge, improving output voltage signal of the biological bracket, BaTiO3-GO nanometre sheet is used as bridging to improve the mechanical strength of PLGA bracket.