高度剥离型环氧树脂／蒙脱土纳米复合材料的制备与性能

The Preparation of Epoxy Nanocomposites with Highly Exfoliated Montmorillonite and Its Properties

以丙酮为溶剂,采用超声波分散和高速搅拌混合相结合的方法制备了高度剥离型环氧树脂/蒙脱土纳米复合材料。XRD与TEM测试结果表明,蒙脱土在环氧树脂中得到了高度剥离,大部分蒙脱土被剥离成独立片层,均匀分散于基体树脂中。对材料的力学性能、热机械性能研究表明,蒙脱土能显著提高材料的冲击强度、弹性模量,但降低了材料的拉伸强度与断裂伸长率。蒙脱土使材料的储存模量显著提高,储存模量在材料的橡胶态比在其玻璃态提高的更加明显。

The preparation of highly exfoliated montmorillonite epoxy nanocomposites were reported by the combination of high-shear mixing in the presence of acetone and ultrasonication. Random dispersion of the individual silicate nanolayers in the epoxy was confirmed by XRD and TEM images. The mechanical and thermal mechanical properties were also investigated, and it is indicated that, the impact strength and elastic modulus are significantly increased with the increase of montmorillonite content, however, the tensile strength and elongation at break are reduced; the storage module increases remarkably with increased montmorillonite concentration, and shows more significant improvement of storage modulus in rubbery state than in glassy state.