空心TiO_2-Q-PDEAEMA/M(0)复合纳米微球的“点击”化学制备与表征  

Preparation and Characterization of Hollow TiO_2-Q-PDEAEMA/M(0) Composite Nanospheres via "Click" Chemistry

作　　者：徐超 刘守信[1] 吕海燕 韦聪聪 安玥明 

机构地区：[1]应用表面与胶体化学教育部重点实验室陕西师范大学化学化工学院,陕西西安710100

出　　处：《高分子材料科学与工程》2013年第5期161-164,168,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(20973106);中央高校基本科研业务费专项资金(GK201001001);长江学者和创新团队发展计划(IRT1070)

摘　　要：以聚苯乙烯球为模板,水解钛酸四正丁酯制备出了空心TiO2微球。采用原子转移自由基聚合法合成了聚N,N-二乙基胺基甲基丙烯酸乙酯(PDEAEMA)高分子链,利用"点击"化学在空心TiO2微球表面接枝PDEAEMA高分子链,季铵化后与贵金属离子进行离子交换用硼氢化钠还原得TiO2-Q-PDEAEMA/M(0)复合纳米微球。通过傅里叶变换红外光谱(FT-IR)、X-射线光电子能谱(XPS)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)等对制备的复合微球进行了表征。结果表明,TiO2-Q-PDEAEMA/M(0)空心纳米复合微球在水中的分散行为具有pH敏感性。Surface of hollow TiO2 spheres was modified by the dopamine bromide and NaN3. Poly （N, N- diethylamino ethyl methacrylate） （PDEAEMA） with propargyl end groups was synthesized via atom transfer radical polymerization, and grafted on TiO2 nanosphere surface with azide groups via “Click” chemistry. The PDEAEMA brushes reacted with CH3I to form quaternized-PDEAEMA （Q-PDEAEMA） so as to facilitate exchange with metal anions, which was followed by in situ reduction with NaBH4 to obtain the noble metal nanoparticles. Thus, the ternary nanocomposites （TiO2-Q-PDEAEMA/M（0）） were obtained. The size of the noble metal nanoparticles in nanocomposites is about 2 nm- 10 nm. The obtained composites were characterized by FT-IR, XPS, SEM, and TEM etc. The results show that the products in aqueous solutions have pH sensitivity.

关 键 词：空心TiO2微球 聚N N-二乙基胺基甲基丙烯酸乙酯 “点击”化学 纳米复合微球 PH敏感性 

分 类 号：TB383[一般工业技术—材料科学与工程]