The Preparation Of Light-responsive Nano-hybrid Materials Using Visible Light Photocatalysis ATRP

Both up-conversion nanomaterials and magnetic nanomaterials are a type of functional nanomaterials with good properties and widely used in the fields of fluorescent probes,biological imaging,anti-counterfeiting detection and drug delivery.The modification of nanomaterial in recent years mainly focused on the surface hydrophilic modification to improve its biocompatibility and further expand its application fields.However,there are relatively few studies on the combination of functional inorganic nanomaterials with stimuli-responsive polymers.The modification of functional inorganic nanomaterials with stimuli-responsive polymers has endowed nanomaterials more functionality and has become an important research in the nanometer field.A simple and convenient visible light photocatalyzed ATRP technology is used to modify up-conversion nanomaterials（UCNP）and magnetic nanomaterials（MNP）with light-responsive polymers to prepare light-responsive organic/inorganic hybrid nanomaterials.The nanomaterials prepared not only possess the up-conversion luminescence or superparamagnetism of nanomaterials,but also has the properties of light-controlled reversible self-assembly of photo-responsive polymers,providing new materials in the fields of optics,magnetic technology,sensors,catalysis,and biology.Opportunity.The research content is as follows:1.The up-conversion nanomaterial（UCNP-OA）was prepared by thermal decomposition method,then the ATRP photo-initiated site was modified on the surface of UCNP.Finally,the photocatalytic ATRP was used to initiate polymerization of MAMC,the UCNP modified with PMAMC was prepared.Through various characterizations,PMAMC was successfully modified on the surface of UCNP,and the up-conversion luminescence properties of the nanomaterials were not affected before and after modification.The prepared UCNP-PMAMC nanomaterial has the property of light-controlled reversible self-assembly.2.An up-conversion nanomaterial（UCNP-Br/OA）was prepared by solvothermal method;Then,a photocatalytic ATRP was used to modify UCNP with PMAMC to prepare UCNP-PMAMC/OA.Through various characterizations,it was proved that PMAMC was successfully modified on the surface of UCNP-Br/OA,and the up-conversion luminescence properties of the nanomaterials were not affected before and after modification.The prepared UCNP-PMAMC/OA nanomaterial has the property of light-controlled reversible self-assembly,but the self-assembly of materials with larger size（such asμm level）is not obvious.3.The magnetic nanomaterial（MNP-OA）were prepared by thermal decomposition,then photo-initiated sites were grafted on the surface of MNP.Finally,the photocatalyzed surface initiated ATRP was used to modify magnetic nanomaterial with PMAMC.Through various characterizations,it was proved that PMAMC was successfully modified on the surface of MNP by photocatalytic ATRP,and the magnetic nanomaterial had superparamagnetism before and after modification.The prepared magnetic MNP-PMAMC nanomaterials were capable of light-controlled reversible self-assembly.4.Magnetic nanomaterials（MNP）were prepared by solvothermal method,then a protective Si O₂ layer was wrapped on the surface of MNP,then photo-initiated site was grafted on the surface of MNP.Finally,the MAMC monomer was initiated by photocatalytic ATRP to prepare magnetic nanomaterial MNP-Si O₂-PMAMC modified with PMAMC.Through various characterizations,it was proved that PMAMC was successfully modified on the surface of MNP by photocatalytic ATRP,and the magnetic nanomaterial had superparamagnetism before and after modification.MNP-Si O₂-PMAMC has the property of light-controlled reversible self-assembly.