载银纳米二氧化钛的分散及对PVC清漆的改性  

Dispersion of Silver Doped Nano-TiO_2 and Its Modification on PVC Varnish

作　　者：张莹[1] 彭兵[1] 柴立元[1] 李国良[1] 万斯[1] 

机构地区：[1]中南大学冶金科学与工程学院环境工程系,长沙410083

出　　处：《涂料工业》2011年第1期24-28,共5页Paint & Coatings Industry

基　　金：湖南省科技重大专项(2008FJ1013)

摘　　要：以提高载银纳米二氧化钛在PVC清漆中的分散性为目的,分别针对物理机械分散、超声分散、表面改性及PVC清漆浓度等因素对载银纳米二氧化钛在PVC清漆中的分散效果的影响进行了研究。结果表明:以4 500 r/min高速机械分散50 min,超声分散40 min,复合分散剂Tritonx-100与六偏磷酸钠在质量比为6∶4,投加量为总体系0.3%,PVC清漆的浓度65%等条件下,载银纳米二氧化钛在PVC清漆中分散很好。在不影响PVC清漆涂膜性能的情况下,载银纳米二氧化钛改性清漆涂膜制得抗菌PVC塑料,光催化降解甲基橙率为81.57%,抗菌率高达99.9%。Dispersion of nano - particles in paint was the key factor in preparation of nano paint. In order to enhance the dispersion of silver doped nano - TiO2 in PVC varnish, the effects of dispersion stability of nano -YiOzin PVC varnish were investigated in terms of the physical dispersing, ultrasonic dispersing, surface modification and concentration of PVC varnish. The experimental results indicated that the nano -TiO2 could be well dispersed in PVC varnish by mechanical dispersion at 4 500 r/min for 50 min, ultrasonic dispersing for 40 min, by adding 3% Tritonx - 100 and sodium hexametahposphate at 6：4 or by controlling the concentration of PVC varnish at 65%. The PVC varnish modified with silver doped nano TiO2 showed excellent antibacterial performance, photocatalytic degradation of methyl orange to 81.57% and antibacterial up to 99. 9%.

关 键 词：载银纳米二氧化钛 PVC清漆 分散 光催化 抗菌性能 

分 类 号：TQ630.6[化学工程—精细化工]