基于环氧树脂和二氧化钛纳米颗粒的高折射率透明纳米复合材料。

Transparent nanocomposites of high refractive index based on epoxy resin and TiO2 nanoparticle.

作者信息

Nguyen Dinh Huong, Kim Han Na, Lee Dai Soo

机构信息

School of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, 561-756, Republic of Korea.

出版信息

J Nanosci Nanotechnol. 2012 May;12(5):4207-10. doi: 10.1166/jnn.2012.5928.

DOI:10.1166/jnn.2012.5928

PMID:22852374

Abstract

A stepwise sol-gel method for the synthesis of stable colloidal TiO2 using hydrolysis and condensation reactions of titanium tetraisopropoxide (TTP) was investigated. The surface modification was carried out using 3-glycidoxypropyltrimethoxysilane (GPTMS). The particle size range of the modified TiO2 observed by TEM was 3-8 nm. The nanocomposites based on an epoxy resin and the modified TiO2 showed strong UV absorption, but maintained high transmittance within the visible region. TEM images of the nanocomposites confirmed the homogenous and fine dispersion of the TiO2 nanoparticles in the epoxy resin. The refractive index of the nanocomposites increased linearly with increasing TiO2 content. With 60% TiO2 by weight, the transmittance and refractive index of the nanocomposite were 98.4% and 1.657, respectively.

摘要

研究了一种采用四异丙醇钛（TTP）的水解和缩合反应合成稳定胶体TiO₂的逐步溶胶-凝胶法。使用3-缩水甘油氧基丙基三甲氧基硅烷（GPTMS）进行表面改性。通过透射电子显微镜（TEM）观察到改性TiO₂的粒径范围为3-8nm。基于环氧树脂和改性TiO₂的纳米复合材料表现出强烈的紫外线吸收，但在可见光区域内保持高透光率。纳米复合材料的TEM图像证实了TiO₂纳米颗粒在环氧树脂中的均匀和精细分散。纳米复合材料的折射率随TiO₂含量的增加呈线性增加。当TiO₂重量含量为60%时，纳米复合材料的透光率和折射率分别为98.4%和1.657。