折射率可调的TiO2-有机硅硬质透明杂化涂层(英文)

Hard Transparent Titania/Silicone Thin Coatings with Tunable Refractive Index

选用钛酸酯偶联剂(TTPO)和硅烷偶联剂(TMSPM)为表面修饰剂,采用钛酸丁酯(TBOT)通过溶胶-凝胶法合成了稳定的二氧化钛溶胶,并与硅烷偶联剂(GPTS)形成的有机硅溶胶杂化,经涂膜和固化,制备了系列TiO2-有机硅涂层材料。通过不同方法对杂化涂层的微结构、光学和机械性质进行了表征。结果表明:所得到的杂化涂层,在可见光范围内的透过率均在90%以上;当Ti的摩尔分数在10%~60%范围内时,涂层折射率在1.50~1.76范围内可调;涂层的铅笔硬度达到7H^9H,疏水角为94°~100°。

A hard transparent titania/silicone hybrid film with tunable refractive index was studied.The titanate coupling agent,Isopropyl tri(dioctylpyrophosphate) titanate(TTPO) and the silane coupling agent,trimethoxysilylpropylmethacrylate(TMSPM),were applied with tetrabutoxytitanate(TBOT) via sol-gel process to obtain a transparent stabilized titanium sol.γ-glycidoxypropy 1trimethoxysilane(GPTS) was prehydrolyzed as a silicone sol,and then reacted with titanium sol.A series of hybrid sols with different Ti content were prepared and applied for crack-free films by dip-coating.Different techniques including IR,UV-vis,SEM,AFM and auto-laser ellipsometer were used to characterize the films.With Ti molar fraction from 10%to 60%,the refractive index of the films increases from 1.50 to 1.76 at 633 nm.The pencil hardness is 7H-9H and the contact angle is 94°~100°.