Publication: Facile synthesis of silver immobilized-poly(methyl methacrylate)/ polyethyleneimine core-shell particle composites
Issued Date
2012-10-01
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ISSN
09284931
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2-s2.0-84863321588
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Mahidol University
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SCOPUS
Bibliographic Citation
Materials Science and Engineering C. Vol.32, No.7 (2012), 2068-2072
Suggested Citation
Somkieath Jenjob, Teeralak Tharawut, Panya Sunintaboon Facile synthesis of silver immobilized-poly(methyl methacrylate)/ polyethyleneimine core-shell particle composites. Materials Science and Engineering C. Vol.32, No.7 (2012), 2068-2072. doi:10.1016/j.msec.2012.05.040 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/14144
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Title
Facile synthesis of silver immobilized-poly(methyl methacrylate)/ polyethyleneimine core-shell particle composites
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Abstract
A facile route to synthesize silver-embedded-poly(methyl methacrylate)/polyethyleneimine (PMMA/PEI-Ag) core-shell particle composites was illustrated in this present work. PMMA/PEI core-shell particle templates were first prepared by a surfactant-free emulsion polymerization. PEI on the templates' surface was further used to complex and reduce Ag + ions (from silver nitrate solution) to silver nanoparticles (AgNPs) at ambient temperature, resulting in the PMMA/PEI-Ag particle composites. The formation of AgNPs was affected by the pHs of the reaction medium. The pH of reaction medium at 6.5 was optimal for the formation of PMMA/PEI-Ag with good colloidal stability, which was confirmed by size and size distribution, FTIR spectroscopy, UV-vis spectroscopy and X-ray diffraction. Moreover, the amount of AgNO 3 solution (4.17-12.50 g) was found to affect the formation of AgNPs. Transmission electron microscopy (TEM) indicated that the AgNPs were incorporated in the PMMA/PEI core-shell matrix, and had 6-10 nm in diameter. AgNPs immobilized on PMMA/PEI core-shell particles were also investigated by energy dispersive X-ray spectroscopy analysis mode extended from scanning electron microscopy (SEM/EDS). Furthermore, the presence of AgNPs was found to influence the thermal degradation behavior of PMMA/PEI particle composites as observed through thermogravimetric analysis (TGA). © 2012 Elsevier B.V. All rights reserved.