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制备了几种不同纳米粒子(SiO2、TiO2、有机化黏土10A、有机化黏土30B)填充的液晶环氧树脂EP-6-DDM复合材料,并用差示热分析(DSC)、偏光显微镜(POM)、X射线衍射(XRD)和热失重分析(TGA)等方法研究了纳米填料/EP-6-DDM复合材料体系的固化反应过程及其相结构变化和热性能。结果表明,四种纳米填料对于EP-6-DDM体系均有催化作用,其中SiO2的催化能力最强,有机化黏土30B的催化能力最弱。当黏土的质量分数为1%时,形成了剥离型纳米复合材料,大于3%时则剥离型和插层型共存。纳米填料的加入并未改变EP-6-DDM的液晶相织构,但是会破坏向列相液晶纹影织构的形成和完整性。热分析结果表明,纳米填料的加入使体系的热稳定性略有降低。
Several kinds of epoxy resin EP-6-DDM composites filled with different nano-particles (SiO2, TiO2, organic clay 10A and organic clay 30B) were prepared and characterized by differential thermal analysis (DSC), polarizing microscope (POM) , X-ray diffraction (XRD) and thermogravimetric analysis (TGA) were used to investigate the curing reaction, phase structure and thermal properties of nanocomposites / EP-6-DDM composites. The results show that all four nanofillers have the catalytic effect on EP-6-DDM system, among which SiO2 has the strongest catalytic activity and the organoclay 30B has the weakest catalytic activity. When the mass fraction of clay is 1%, a peeled nanocomposite is formed, while when it is more than 3%, peeled and intercalated coexist. The addition of nanofillers did not change the texture of EP-6-DDM, but destroyed the formation and integrity of nematic liquid crystal texture. The results of thermal analysis show that the thermal stability of the system is slightly reduced by the addition of nano-filler.