Ordered mesoporous silica nanoparticles with pore diameter of 5 nm were synthesized by modification of the sol-gel synthesis method. Post-synthesis two-step grafting of thermoresponsive poly(N-isopropylacrylamide) inside the mesopores of the nanoparticles was carried out by distillation precipitation polymerization of the methacryloxy-functionalized mesoporous nanoparticles with N-isopropylacrylamide monomer. A precise control on the quantity of the grafted polymer was achieved by changing the ratio of monomer to methacryloxy–functionalized nanoparticles. The polymer-grafted hybrid nanoparticles obtained were fully characterized by infrared spectroscopy, X-ray diffraction, dynamic light scattering, transmission electron microscopy, thermal and gas-volumetric analyses, which clearly showed presence and thermoresponsive behavior of the polymer inside the mesopores with the preservation of the characteristic mesoporous structure of the nanoparticles.

Controlled post-synthesis grafting of thermoresponsive poly(N-isopropylacrylamide) on mesoporous silica nanoparticles

JADHAV, Sushilkumar Arjun;MILETTO, IVANA;BRUNELLA, VALENTINA GIOVANNA;BERLIER, Gloria;SCALARONE, Dominique Maria
2015-01-01

Abstract

Ordered mesoporous silica nanoparticles with pore diameter of 5 nm were synthesized by modification of the sol-gel synthesis method. Post-synthesis two-step grafting of thermoresponsive poly(N-isopropylacrylamide) inside the mesopores of the nanoparticles was carried out by distillation precipitation polymerization of the methacryloxy-functionalized mesoporous nanoparticles with N-isopropylacrylamide monomer. A precise control on the quantity of the grafted polymer was achieved by changing the ratio of monomer to methacryloxy–functionalized nanoparticles. The polymer-grafted hybrid nanoparticles obtained were fully characterized by infrared spectroscopy, X-ray diffraction, dynamic light scattering, transmission electron microscopy, thermal and gas-volumetric analyses, which clearly showed presence and thermoresponsive behavior of the polymer inside the mesopores with the preservation of the characteristic mesoporous structure of the nanoparticles.
2015
26
9
1070
1075
http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1099-1581
Distillation-precipitation polymerization; Mesoporous silica nanoparticles; Poly(N-isopropylacrylamide); Sol-gel synthesis; Thermoresponsive polymer; Polymers and Plastics
Jadhav, Sushilkumar A; Miletto, Ivana; Brunella, Valentina; Berlier, Gloria; Scalarone, Dominique
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1558665
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