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Báo cáo hóa học: " Facile Preparation of Crosslinked Polymeric Nanocapsules via Combination of Surface-Initiated Atom Transfer Radical Polymerization and Ultraviolet Irradiated "

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Facile Preparation of Crosslinked Polymeric Nanocapsules via Combination of Surface-Initiated Atom Transfer Radical Polymerization and Ultraviolet Irradiated | Nanoscale Res Lett 2009 4 773-777 DOI 10.1007 S11671-009-9311-0 NANO EXPRESS Facile Preparation of Crosslinked Polymeric Nanocapsules via Combination of Surface-Initiated Atom Transfer Radical Polymerization and Ultraviolet Irradiated Crosslinking Techniques Bin Mu Ruoping Shen Peng Liu Received 9 February 2009 Accepted 2 April 2009 Published online 6 May 2009 to the authors 2009 Abstract A facile approach for the preparation of crosslinked polymeric nanocapsules was developed by the combination of the surface-initiated atom transfer radical polymerization and ultraviolet irradiation crosslinking techniques. The well-defined polystyrene grafted silica nanoparticles were prepared via the SI-ATRP of styrene from functionalized silica nanoparticles. Then the grafted polystyrene chains were crosslinked with ultraviolet irradiation. The cross-linked polystyrene nanocapsules with diameter of 20-50 nm were achieved after the etching of the silica nanoparticle templates with hydrofluoric acid. The strategy developed was confirmed with Fourier transform infrared thermogravimetric analysis and transmission electron microscopy. Keywords Crosslinked polymeric nanocapsules Template Surface-initiated atom transfer radical polymerization Ultraviolet irradiation Introduction In recent years significant progress has been made in the design and fabrication of polymeric micro- and nanocapsules which have attracted great attention because of a variety of applications such as delivery vesicles for drugs dyes or inks micro-containers for artificial cells and B. Mu R. Shen P. Liu H State Key Laboratory of Applied Organic Chemistry and Institute of Polymer Science and Engineering College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 People s Republic of China e-mail pliu@lzu.edu.cn catalysis protection shield for proteins enzymes or DNA probing single-cell signaling and so on 1-5 . A large number of physical and chemical strategies have been developed for the .