摘要
采用水溶性羟丙基甲基纤维素HPMC对纳米二氧化钛进行包覆,而后接枝甲基丙烯酸甲酯进行表面改性,并采用红外光谱,透射电镜和差示扫描量热分析对改性后的二氧化钛进行表征。红外光谱的分析表明,在无机纳米粒子TiO2的表面接枝上了PMMA;从透射电镜照片可以清楚地看出,未经处理的纳米粒子团聚在一起,经过处理的纳米粒子的表面均匀地包覆了一层聚合物;差示扫描量热分析的结果表明,复合改性后的复合纳米粒子的热分解温度比均聚PMMA的热分解温度提高了135℃。
Water-soluble cellulose hydroxyl-propyl-methyl cellulose was used to encapsulate nano-TiO_2 powder, then methyl methacrylate was grafted onto it to modify the surface of nano-TiO_2. The modified TiO_2 was characterized by means of FT-IR, TEM and DCS.The results of FT-IR confirm that PMMA has been grafted onto the surface of nano-TiO_2; the photos of TEM show that the untreated nano-particles come togather in a group,while the treated nano-particles are encapsulated by a layer of polymer; the decomposition temperature of nano-TiO_2 is 135 ℃ higher than that of PMMA.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2004年第5期194-196,共3页
Polymer Materials Science & Engineering
基金
安徽省教育厅科研基金资助项目(2001KJ096
2003KJ173)
安徽师范大学科研专项基金资助项目(2000ZX10)
安徽师范大学青年基金资助项目
