Abstract

Info

Title:: Responsive Block Copolymer Induced Large Pore Mesoporous Hollow Silica Nanospheres

Author(s):: HE Huan; XU Yanling; MA Rujiang; SHI Linqi; (Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry,Nankai University, Tianjin, 300071, PR China)

Abstract:: Controllable largepore mesoporous hollow silica nanospheres (LMHSN) with large surface area (1 01811 m2/g) 〖JP+1〗and mesoporous width (121 nm) was synthesized through a general method. Firstly, responsive block copolymers poly (ethylene glycolbNisopropyl acrylamide) (PEG114bPNIPAm130) and poly (Nisopropyl acrylamideb4vinyl pyridine) (PNIPAm106bP4VP102) selfassembled into coreshell complex micelles, followed by silicification of the shell with the addition of the silica precursor tetramethoxysilane (TMOS) under mild condition. Then, the effects of addition of crosslinker and different pH values on the structure and morphology of LMHSN were discussed. Finally, we studied the ability of the adsorption of macromeolecular by the LMHSN.