不同表面修饰纳米SiO_2/尼龙66复合材料的热性能  

Thermal properties of different surface modified nano-SiO_2/PA66 composites

作　　者：徐翔民[1,2] 胡修池[1] 张予东[2] 张治军[2] 

机构地区：[1]黄河水利职业技术学院机电工程系,开封475004 [2]河南大学特种功能材料教育部重点实验室,开封475004

出　　处：《复合材料学报》2011年第6期71-79,共9页Acta Materiae Compositae Sinica

基　　金：高等学校博士学科点专项科研基金(20060475001)

摘　　要：通过熔融共混将不同表面修饰的纳米SiO2与尼龙66在双螺杆挤出机上混合,制备出纳米SiO2/尼龙66复合材料。采用FTIR和XPS等测试手段分析了复合材料体系中不同表面修饰纳米SiO2与尼龙66的相互作用,并在此基础上对复合材料的热性能进行了研究。研究结果表明:不同的表面修饰处理得到不同的纳米SiO2/尼龙66界面相互作用,而界面相互作用的改变会对尼龙66的熔融和结晶行为产生影响:一方面使复合材料的结晶温度降低,晶粒尺寸减小,另一方面导致复合材料结晶度发生变化;TGA和DMA分析显示纳米SiO2表面修饰结构的不同还会对复合材料的热稳定性和玻璃化转变温度产生影响。The PA66- based composites containing surface modified nano-SiO2 with different treatments were prepared in a twin-screw extruder by melt compounding. The interaction of different surface modified nano-SiO2 and PA66 in composites systems was studied by FTIR and XPS, and the thermal properties of composites were investigated. The results show that different surface modification treatments bring different interface interactions between nano-SiO2 and PA66, which can influence the melting and crystallization behavior of the PA66 matrix. The presence of modified nano-SiO2 can result in a lower crystallization temperature and smaller grain size of composites compared with pure PA66 and cause changes in crystallinity of nano-SiO2/PA66 composites. The TGA and DMA results indicate that surface modification structures of nano-SiO2 can produce effect on the thermal stability and glass transition temperature of nano-SiO2/PA66 composites.

关 键 词：尼龙66 纳米SIO2 复合材料 表面修饰 热性能 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]