PMOs/PMMA纳米复合材料的制备及性能研究

Study on the Synthesis and Performance of PMOs/PMMA Nano-composite

采用低温水热合成法合成周期性介孔有机硅(PMOs)材料,并制备了具有网络结构的PMOs/PMMA纳米复合材料。通过FT-IR、XRD、TEM和SEM等方法对其结构和性能进行了表征。结果表明:通过改变1,2-双-三乙氧基硅基乙烷(BTESE)的物质的量比例,可获得宏观形貌从立方(Fm3m)结构变化到纳米空心小球的一系列PMOs材料。在PMOs/PMMA纳米复合材料中,PMOs仍保持其原有的介观结构。在PMOs含量较低时对PMMA拉伸强度和模量、弯曲强度和模量增强作用较为明显,但增韧效果较差。

The periodic mesoporous organosilica （PMOs） materials were synthesized via low-temperature hydmthermal synthesis method, and the PMOs/PMMA nanocomposites with network structure were prepared via in-situ polymerization. The structural feature and performances of these nanocomposites were studied by FT-IR, XRD, TEM and SEM. The results revealed that the PMOs materials exhibited a phase transition from cubic （Fm3m） to nano-hollow ball as changing the content of BTESE. The PMOs remained its mesoporous structure in PMOs/PMMA nanocomposites. Compared with the matrix, the strength and modulus of nanocomposites were improved by PMOs, the tensile strength and elasticity modulus, the bending strength and modulus of PMMA were improved more significantly by PMOs when content in low levels, but PMOs had little effect on the toughness of the materials.