改性纳米TiO_2粒子改善PP-R性能的研究

文章以锐钛型纳米二氧化钛为添加剂来提高PP-R树脂的各项性能,并系统研究了纳米TiO_2粒子的包膜改性,以及改性后的纳米二氧化钛对PP-R树脂耐热性、力学性能以及抗菌性等的影响;通过扫描电镜观察了材料的断面以及晶须在基体中的分散性。研究表明,使用6%的硅铝复合包膜改性后的纳米TiO_2粒子具有较好的分散性;与纯PP-R相比,纳米TiO_2粒子添加量为3%～5%的改性PP-R材料的性能有较大的提高,其热变形温度由72℃提高到96℃,断裂伸长率由45%提高到91%。锐钛型纳米二氧化钛不仅可改善PP-R材料的热学和力学性能,而且可提高材料的抗菌性,其适用添加量为4%。

Research on improving the capabilities of PP-R resin with Nano-TiO2 powder

The capabilities of PP-R resin were improved through adding the anatase titanium dioxide in this paper.The modifica- tion process of Nano-TiO_2 and the influence of nano-TiO_2 in improving the capabilities of PP-R resin,such as the mechanics capa- bilities,heat capabilities and anti-bacterium,had been researched in detail.The break surface PP-R composite material and the disperse character of stuffing were observed by SEM imagines.The results showed that the Nano-TiO_2 modified with 6% Na_2SiO_3 possesses better disperse character.Comparing to pure PP-R resin,the capabilities of PP-R adding 3～5% modified Nano-TiO_2 was improved largely.The temperature distortion was improved from 72℃to 92℃and the Maximum elongation was improved from 45% to 91% too.The adding of anatase nanometer TiO_2 improved not only the mechanics and calorific characters of PP-R.but also the anti-bacterium character.