摘要
本文利用硅烷偶联剂对纳米TiO2进行表面改性,并将改性和未改性的纳米TiO2按不同比例添加到聚氨酯涂料中,制备了纳米TiO2/聚氨酯复合涂层,实验结果表明,经硅烷偶联剂改性后的纳米TiO2在涂料中分散良好,粒径在100 nm左右。改性后的纳米TiO2能够有效提高涂层的耐盐水浸泡性能。当改性纳米TiO2添加量为3%时,涂层的耐盐水浸泡性能最好。该涂层在经过56天的盐水浸泡后,铅笔硬度从3H下降到HB,附着力从1级下降到3级,光泽度从120.9下降到99.6,耐冲击性能从22 N.cm下降到12 N.cm,在所有试样中下降程度最低。
The surface of nano- TiO2 was modified by coupling agent in this paper. The modified and unmodified nano -TiO2 were added into to the polyurethane to prepare nano - composite coatings. The results indicated that the modified nano - TiO2 disperse well in the coatings, The saline immersion resistance of nano - composite coatings was improved effectively. When the content of modified nano - TiO2 was 3% , the saline immersion resistance of coatings was the best. After 56day saline immersion, the pencil hardness of composite coatings with 3% modified nano - TiO2 decreased from 3H to HB, the adhesion rank decreased from 1 to 3, the glossiness was from 120.9 to 99.6, and anti impact properties decreased from 22 N · cm to 12 N · cm. The reduction of properties is the smallest in air of samples.
出处
《南昌航空大学学报（自然科学版）》
CAS
2009年第4期53-58,共6页
Journal of Nanchang Hangkong University(Natural Sciences)
关键词
纳米TIO2
表面改性
耐盐水浸泡
nano- TiO2
surface modification
saline immersion resistance
