【摘要】 以钛酸丁酯(TBOT)为前驱物,盐酸为催化剂,γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH-570)为改性剂,采用溶胶-凝胶法原位制备了KH-570改性的纳米二氧化钛,研究了KH-570用量对纳米二氧化钛表面改性效果的影响,并采用红外光谱(FT-IR)、X射线衍射(XRD)、粒径分析等手段对纳米二氧化钛进行了表征。结果表明:KH-570接枝到纳米二氧化钛表面,纳米二氧化钛为锐钛矿型;随着KH-570用量的增大,接枝率先上升然后稍有下降,当KH-570用量为TBOT质量的14.57%时,接枝率达到25.6%;与未加KH-570制备的二氧化钛相比,KH-570改性纳米TiO2的平均粒径减小且分布变窄,亲油性得到明显提高。更多还原

【Abstract】 Nano-sized KH-570 modified titanium dioxide(nano-TiO2) was in stiu prepared by sol-gel method,using butyl titanate(TBOT) as precursor,hydrochloric acid as catalyst and γ-methacryloxypropyl trimethoxy silane(KH-570) as modifying agent.Effects of the amount of KH-570 on surface modification of nano-TiO2 were studied.Nano-TiO2 was characterized by FT-IR,XRD,and particle size analyzer ect..Results showed that KH-570 was grafted onto the surface of nano-TiO2 particles with anatase form;with the increase of amount of KH-570,grafting rate raised firstly and then reduced a little bit;when mass fraction of KH-570 to TBOT was 14.57%,grafting rate reached 25.6%;compared with unmodified nano-TiO2,average particle size of KH-570 modified nano-TiO2 decreased,its size distribution became narrow,and lipophilicity was improved apparently.更多还原