纳米TiO_2含量对SEBS/TiO_2复合材料性能的影响

Influence of Nano-TiO_2 Content on Properties ofSEBS/TiO_2 Composites

以纳米二氧化钛为抑菌剂,使用表面改性剂改善纳米二氧化钛与SEBS的相容性,制备出具有特殊用途的SEBS/TiO2纳米复合材料,并考察了TiO2添加量对复合材料力学性能的影响。采用SEM表征纳米二氧化钛在SEBS中的分散性能;采用黄色指数间接评价材料的抑菌性能。研究表明:随TiO2表面改性剂用量的增加,SEBS/TiO2纳米复合材料的拉伸强度、伸长率、抑菌性能呈先增加后减少趋势;随TiO2含量的增加,SEBS/TiO2纳米复合材料的拉伸强度、伸长率、黄色指数均不同程度增加。表面改性剂和纳米TiO2用量均为4%时,SEBS/TiO2纳米复合材料的黄色指数最高能达到27,即材料的抑菌性能最佳,此时也可以达到很好的力学性能。

With the use of nano-titanium dioxide as bacteriostat and surface modifier improving the compatible capability between nano-TiO2 and SEBS, the SEBS/TiO2 nano-eomposites with special use were prepared and the influence of TiO2 dosage on composite properties was also researched. The dispersed performance of nano-TiO2 in SEBS was characterized with SEM and its bacteriostasis performance was measured with yellow index. The result showed that the tensile-strength, elongation and bacteriostasis performance of SEBS/TiO2 nano-composites increased firstly and then reduced with increase of surface modifier. And the tensile-strength, elongation and yellow index of SEBS/TiO2 nano-composites rose with increase of content of TiO2. Expecially, when the amount of surface modifier and the nano-TiO2 are 4%, the yellow index of SEBS/TiO2 nanocomposites can reach a maxium of 27, the antibacterial properties of the material is best at this time ,it also can achieve very good mechanical properties.