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Journal of Microencapsulation
Micro and Nano Carriers
Volume 22, 2005 - Issue 6
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Research Article

Preparation and characterization of core/shell SiOx/PAM nanospheres with ‘graft from’ method

Peng Liu Institute of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Lanzhou University, Gansu, PR China
&
Zhixing Su Institute of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Lanzhou University, Gansu, PR China
Pages 683-688 | Received 28 Mar 2005, Accepted 20 Sep 2005, Published online: 08 Oct 2008
 
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Abstract

The core/shell SiO2 encapsulated with polyacrylamide (SiOx/PAM) nanospheres were successfully prepared by the radical copolymerization of acrylamide (AM) and a macromonomer, methacryloxypropyl SiOx (MP-SiOx) nanoparticles, initiated with AIBN via a facile precipitation polymerization method in ethanol. The percentage of encapsulating (PE%) and the conversion of the AM (C%) of 327.5% and 93%, respectively, were achieved after a polymerizing time of 3 h. The formation mechanism of the core/shell SiOx/PAM nanospheres was explained. The nanospheres were characterized by elemental analysis (EA), Fourier transform infrared (FTIR), X-ray photoelectron spectrometer (XPS) and transmission electron microscope (TEM).

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