tailieunhanh - Báo cáo hóa học: " Polymeric Nanocapsule from Silica Nanoparticle@Cross-linked Polymer Nanoparticles via One-Pot Approach"

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: Polymeric Nanocapsule from Silica Nanoparticle@Cross-linked Polymer Nanoparticles via One-Pot Approach | Nanoscale Res Lett 2009 4 1271-1274 DOI S11671-009-9392-9 NANO EXPRESS Polymeric Nanocapsule from Silica Nanoparticle@Cross-linked Polymer Nanoparticles via One-Pot Approach Ruoping Shen Bin Mu Pengcheng Du Peng Liu Received 6 June 2009 Accepted 3 July 2009 Published online 16 July 2009 to the authors 2009 Abstract A facile strategy was developed here to prepare cross-linked polymeric nanocapsules CP nanocapsules with silica nanoparticles as templates. The silica nano-particle@cross-linked polymer nanoparticles were prepared by the encapsulation of the silica nanoparticles by the one-pot approach via surface-initiated atom transfer radical polymerization of hydroxyethyl acrylate in the presence of N N -methylenebisacrylamide as a cross-linker from the initiator-modified silica nanoparticles. After the silica nanoparticle templates were etched with hydrofluoric acid the CP nanocapsules with particle size of about 100 nm were obtained. The strategy developed was confirmed with Fourier transform infrared thermogravimetric analysis and transmission electron microscopy. Keywords Polymeric nanocapsule Cross-linked Template One-pot SI-ATRP Introduction Polymer nanocapsules the nanometer-sized hollow polymer spheres have attracted more and more researching interests because of their fascinating potential applications such as drug delivery 1 2 microreactors 3 4 imaging 5 catalysts 6 and self-healing materials 7 . By now many excellent strategies had been developed for the preparation of polymer nanocapsules 8-10 . In R. Shen B. Mu P. Du 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 730000 Lanzhou People s Republic of China e-mail pliu@ order to assert the control over the shell thickness of polymeric nanocapsules the approach based on the surface-initiated controlled living radical polymerization CLRP has been developed with .