%0 Journal Article
%T SiO2 NANOPARTICLES MODIFICATION WITH POLYMER USING AN ESTERIFICATION METHOD AT ROOM TEMPERATURE<br>新型室温酯化法接枝聚合物改性SiO2纳米微粒
%A FENG Libang
%A QIANG Xiaohu
%A XU Lixin
%A <br>冯利邦
%A 强小虎
%A 徐立新
%J 高分子学报
%D 2010
%I 
%X A novel method for grafting polymer onto the surface of nano-SiO2 particles via the esterification reaction at room temperature,atmosphere,etc.was developed and organic/inorganic composite nano-particles were prepared.The method was carried out via two steps.First,the nano-SiO2 was modified with 3-glycidoxypropyl trimethoxysilane,and then the introduced epoxy groups at the surface of the nano-SiO2 particles were converted into alkyl-hydroxyl groups.Secondly,the polymer was grafted onto the nano-SiO2 surface via the esterification reaction between the alkyl-hydroxyl groups and the carboxyl groups at the polymer terminal at room temperature.The modification of the nano-SiO2 and the resulting composite particles were characterized by XPS,FTIR,TEM and TGA.Results showed that the method has higher grafting efficiency,and the grafted polymer accounted for 55 wt%~70 wt% of the total composite particles.As a result,the particle size increased from 40 nm to 64~75 nm upon the polymer grafting.Consequently,the core-shell composite particles with polymer chains on the outside and SiO2 in the core were obtained.
%K 室温
%K 酯化反应
%K 接枝
%K 纳米SiO2
%K 聚合物
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=6579068328FE643F&jid=15971983683C7643EE80F1CE621DEB60&aid=094673F2ACF48DB192AB51C2BDFD5494&yid=140ECF96957D60B2&iid=5D311CA918CA9A03&sid=309A221A57FE8496&eid=10343777FBBF55D5&journal_id=1000-3304&journal_name=高分子学报&referenced_num=0&reference_num=7