纳米TiO_2粉体改性的溶剂化效应研究  

Study on the solvation effect for surface modification of nano-TiO_2 powder

作　　者：何其云[1] 钱家盛[1,2] 苗继斌[1,2] 夏茹[1,2] 陈鹏[1,2] 程国君[3] 

机构地区：[1]安徽大学化学化工学院,合肥230039 [2]安徽省绿色高分子材料重点实验室,合肥230039 [3]安徽理工大学材料科学与工程学院,淮南232001

出　　处：《化工新型材料》2016年第3期146-148,151,共4页New Chemical Materials

基　　金：国家自然科学基金项目(51273001);教育部博士点基金项目(20113401110003)

摘　　要：采用溶液聚合法合成大分子改性剂低相对分子量聚丁二烯液体橡胶接枝马来酸酐(LMPB-g-MAH)对纳米TiO_2进行表面改性。通过调节强、弱极性溶剂比例来研究改性过程中溶剂对改性效果的影响,探索理想改性环境;运用IR、GPC、粒径、TGA、接触角、亲油化度和沉降实验手段对粉体改性效果进行表征。结果表明:LMPB-g-MAH在有机溶剂环境下均能成功改性纳米TiO_2,但是,混合溶剂环境下LMPB-g-MAH对粉体的改性效果明显优于单溶剂环境,尤以乙酸乙酯∶DMF=9∶1混合环境最佳。LMPB-g-MAH of macromolecular modifier was synthesized using solution polymerization and it was used as modifier for surface modification of nano-TiO_2.The solvation effect was researched in the modification process through adjusting the proportion of polar and weak polar solvent to explore the ideal environment of modification.Surface properties of modified nano-TiO_2 were systematically investigated by IR,GPC,particle size analysis,TGA,contact angle analysis,hydrophobic and sedimentation test.The results showed that nano-TiO_2 can be successfully modified with macromolecular modifier in the organic solvent environment,while nano-TiO_2 modified in the mixed solvent can achieve the better result than that in the single solvent,especially in the environment of the mixed solvent of ethyl acetate∶DMF=9∶1.

关 键 词：大分子改性剂 纳米TIO2 表面改性 溶剂化 

分 类 号：TQ134.11[化学工程—无机化工] TB383.1[一般工业技术—材料科学与工程]