PA6/TiO_2-GO复合材料的制备及其性能研究

Study on Preparation and Properties of PA6/TiO_2-GO Composites

通过双螺杆挤出机将聚酰胺6(PA6)、纳米TiO_2、氧化石墨烯(GO)熔融共混制备了PA6/TiO_2-GO复合材料,采用差示扫描量热仪、电子万能拉伸试验机、可见分光光度计等仪器研究了纳米TiO_2用量对PA6/TiO_2-GO复合材料的热学性能、力学性能、光催化性能等的影响。结果表明,随着纳米TiO_2含量的增加,复合材料的熔点逐渐降低,结晶度先增大后减小(复合材料的结晶度均大于纯PA6的结晶度);断裂强度逐渐减小,断裂伸长率逐渐增大;纳米TiO_2对亚甲基蓝溶液的光催化降解能力越来越强;在相同纳米TiO_2含量时,加入GO后能有效提高TiO_2的光催化降解能力,光催化降解能力能提高10%左右。

Photocatalytic technology plays an important role in sewage treatment of and air purification.In this paper,the effect of nano-TiO2content on the thermal properties,mechanical properties,photocatalytic properties of PA6/TiO2-GO composites were investigated by differential scanning calorimeter,electronic universal tensile testing machine,visible spectrophotometer and other instruments.The results indicated that the melting point of the composites decreased gradually with an increase of nano-TiO2content,and the degree of crystallinity exhibited an increasing trend at first and then tended to decrease.Meanwhile,the breaking strength decreased gradually,whereas the elongation at break increased gradually.Moreover,the nano-TiO2exhibited an increasing photocatalytic activity for degradation of the methylene blue solution.The incorporation of graphene oxide(GO)could effectively improve the photocatalytic effectiveness of nano-TiO2by approximately10%.