二维和零维纳米材料协同增强的高性能纳米复合材料

将二维蒙脱土和零维纳米TiO_2共同复合到环氧树脂中,成功地制备出一种高性能有机蒙脱土/纳米TiO_2/环氧树脂复合材料。力学性能测试和热分析显示,该复合材料在拉伸模量、拉伸强度、弯曲模量、弯曲强度、缺口冲击强度、玻璃化转变温度、热分解温度上都明显优于纯环氧树脂,也优于有机蒙脱土/环氧树脂复合材料和纳米TiO_2/环氧树脂复合材料。XRD检测和透射电子显微镜观察显示,在有机蒙脱土/纳米TiO_2/环氧树脂复合材料中,蒙脱土被完全剥离为纳米单片,和纳米TiO_2交错分布于环氧树脂中。选择适宜的两种维度的纳米材料复合于聚合物中,是制备新型高性能复合材料的成功思路。

High-performance nanocomposites synergistically reinforced by 2-dimensional montmorillonite and 0-dimensional nano TiO_2

Comprehensive high-performance epoxy nanocomposites were successfully prepared by co-incorporating 2-dimensional montmorillonite(MMT)and 0-dimensional nano TiO 2 co-incorporated into epoxy.Mechanical tests and thermal analyses show that the resulting epoxy/MMT/nano TiO2 nanocomposites obtained are obviously superior to pure epoxy,epoxy/MMT nanocomposites,and epoxy/nano TiO2 nanocomposites in tensile modulus,tensile strength,flexural modulus,flexural strength,notch impact strength,glass transition temperature,and thermal decomposition temp-erature.X-ray diffraction and transmission electron microscopy inspection reveal that in the epoxy/MMT/nano TiO2 nanocomposites,the MMT is completely exfoliated into 2-dimensional nanoscale mono-platelets,which is intermingled with the 0-dimensional nano TiO 2 spheres in epoxy resion.This study shows is that co-incorporating two proper,dimensionally different nanomaterials into polymer matrices could be a successful pathway in preparing comprehensive high-performance polymer nanocomposites.