双亲型二氧化钛纳米粒子的制备及高稳定非水分散性研究  

Preparation of Amphiphilic TiO_(2)Nanoparticles with Highly-stabilized Non-aqueous Dispersibility

作　　者：何盈至 赵谦[1] 王世荣[1] 刘红丽[1] 张天永[1] 李彬[1] 李祥高[1] HE Yingzhi;ZHAO Qian;WANG Shirong;LIU Hongli;ZHANG Tianyong;LI Bin;LI Xianggao(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学化工学院,天津300072

出　　处：《材料导报》2022年第20期141-146,共6页Materials Reports

基　　金：国家自然科学基金(201908161);天津市自然科学基金青年基金(20JCQNJC01220)。

摘　　要：以钛酸丁酯(TBOT)为钛源、氨水(25%~28%)为反应介质、阳离子表面活性剂十六烷基三甲基溴化铵(CTAB)为改性剂,采用水热法合成并改性双亲型二氧化钛纳米粒子。通过控制反应温度和反应时间,对水热合成的过程进行了探究。为防止二氧化钛粒子的团聚、提高其在有机分散介质中的荷电量及分散稳定性,在反应体系中添加不同浓度的CTAB对生成的二氧化钛纳米粒子进行表面改性。通过X射线衍射光谱(XRD)、扫描电镜(SEM)、红外光谱(FTIR)对改性后的二氧化钛纳米粒子进行了表征。对Zeta(ζ)电位、粒径及其分布、电泳淌度和分散稳定性进行了探究。结果表明,当CTAB加入浓度为0.7 mg/mL时,二氧化钛纳米粒子在Isopar L中的Zeta电位值最高为+58.89 mV,且粒子分散稳定。本研究提供了一种能够均匀分散在非水中的双亲型TiO_(2)纳米粒子合成方法。Amphiphilic titanium dioxide nanoparticles were synthesized and modified by a hydrothermal method using tetrabutyl titanate(TBOT)as the titanium source and cationic surfactant cetyltrimethylammonium bromide(CTAB)as the modifier in ammonia water(25%—28%)medium.The hydrothermal synthesis process was investigated by controlling the reaction temperature and time in this work.The surface of prepared TiO_(2)particles was modified by cationic surfactant CTAB with varied concentrations in the reaction system in order to prevent the agglomeration of TiO_(2)nanoparticles and improve their charge and dispersion stability in organic dispersion medium.The modified TiO_(2)nanoparticles were fully characterized by X-ray diffraction spectroscopy(XRD),scanning electron microscope(SEM)and infrared absorption spectroscopy.The properties of Zeta(ζ)potential,particle size distribution,electrophoretic mobility and dispersion stability were explored.The results show that the Zeta potential of TiO_(2)nanoparticles in Isopar L reaches as high as+58.89 mV and particles maintains high dispersion stability,when CTAB has been added at an optimal concentration of 0.7 mg/mL.This study provides an efficient way to synthesis uniformed and amphiphilic TiO_(2)nanoparticles with well-dispersed property in the non-aqueous solution.

关 键 词：二氧化钛纳米粒子 水热法 ZETA电位 分散稳定性 非水体系 

分 类 号：TQ134[化学工程—无机化工]