Preparation And Properties Of Polymeric Janus Nano-materials

With the development of science and technology,novel materials have become the current trend of scientific research.The traditional symmetrical materials contain a single component,but the composite materials have attracted intense research attention due to some unique performance properties.The Janus materials bring more opportunities and challenges to the field of materials.In this paper,the synthesis and characterization of polymeric Janus nanosheets and photo-responsive polymeric nanocapsules were reported.The main contents are as follows:1.In this experiment,amino functionalized silica nanoparticles?SNP-NH2?and bromide functionalized silica nanoparticles?SNP-Br?were prepared by modification on the surface of the Si O₂ nanoparticles.SNP-g-Pt BMA-Br was synthesized by polymerization of t-butyl methacrylate?t BMA?using the SNP-Br as an initiator,Cu Br as a catalyst,Me6 TREN as an aligand,EGDMA as a cross-linking agent.The SNP-g-Pt BMA-Br was used as an initiator to initiate the polymerization of acrylamideto synthesize SNP-g-Pt BMA-b-PAM-Br,N,N,N,N,N'-pentamethyldiethylene triamine as a ligand,and Cu Br as a catalyst.Finally,polymeric Pt BMA/PAM microcapsules were synthesized by removal of the silica template in the presence of hydrofluoric acid.polymeric Janus Pt BMA/PAM nanosheets were synthesized by crushing in low temperature,which have excellent emulsifying properties in toluene and water.2.The photosensitive monomer DNQMA was synthesized.SNP-g-Pt BMA-Br was synthesized as the part 1.The SNP-g-Pt BMA-Br was used as an initiator to initiate the polymerization of DNQMA synthesize SNP-g-Pt BMA-b-PDNQMA-Br,N,N,N,N,N'-pentamethyldiethylene triamine as a ligand,and Cu Br as a catalyst.Finally,The polymeric Janus nanocapsules were synthesized by removal of the silica template in the presence of hydrofluoric acid.Herein,Rhodamine B as a small molecule model was adsorbed to the photosensitive polymeric Janus nanocapsules by permeation in DMF.The synthesized polymeric Janusnanocapsules have excellent photosensitivity in researching the dye release behavior under light conditions and withou light conditions respectively.