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Surface modification of nano‐SiO 2 by grafting PMMA/PBA
Author(s) -
Yu HaiYin,
Gu JiaShan,
Guan MingYun,
Wu ZhengCui,
Sun YiMin,
Du Jun
Publication year - 2003
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20030211012
Subject(s) - chemistry , grafting , surface modification , nano , nanotechnology , chemical engineering , polymer chemistry , polymer , organic chemistry , engineering , materials science
The surface of nano‐SiO 2 was modified by being encapsulated with hydroxy‐propyl‐methyl cellulose (HPMC), and then cografted with acrylates. The grafting conditions, such as pH of the medium, and initiator concentration have been studied. The modified nano‐SiO 2 particles were characterized by TEM, DSC and FT‐IR spectra. TEM images show that the surface of the nano‐particles has been successfully modified by a thick layer of film‐like polymer in this way. The DSC results show that the decomposition temperature of modified nano‐particles of SiO 2 is 90 °C higher than that of grafted‐on polymer. According to the FT‐IR spectra, it is convinced that poly‐methyl methacrylate (PMMA) and poly‐acrylic butyl‐ester (PBA) were co‐grafted onto the surface of nano‐SiO 2 .