环氧树脂/二氧化钛纳米复合材料的制备及性能

以纳米ＴｉＯ２ 为填料制备了环氧树脂／ 二氧化钛（ＥＰ／ＴｉＯ２） 纳米复合材料,研究了纳米ＴｉＯ２ 对复合材料性能的影响,结果表明,纳米ＴｉＯ２ 经表面处理后,可对环氧树脂实现增强、增韧,当填充质量分数为３ ％ 时,材料的拉伸弹性模量较ＥＰ提高３７０ ％ ,拉伸强度提高４４ ％ ,冲击强度提高８７８ ％ ,其他性能也有明显提高。     

Hydrothermal synthesis of zeolites from natural stellerite

Y and P zeolites were synthesized hydrothermaUy from natural stellerite under different conditions and were characterized via XRD and FT-IR. The results show that the higher crystaUinity of Y zeolite can be obtained in hydrothermal systesn with low alkalinity, low Ca^2 /Na^ ratio, and high SiO2/Al2O3 ratio. The lattice space of the samples decreases as crystallization time increases. P Zeolite is prompted under condition of higher alkalinity and higher Ca^2 /Na^ ratio. The intensity and number of bands in the range of 400 cm^-1～ 900cm^-1 increases with reaction time. Bands at 680cm^-1, 760cm^-1 and 860 cm^-1 corresponding to Y zeolite appear during the crystallization stage. Most of these bands shift to higher wavenumbers when SiO2/Al2O3 ratio increases generally. In the hydrothermal systesn with reverse condition above, bands at 600cm^-1, 420cm^-1～470cm^-1 hardly change as the crystallization time increases and the main crystal phase of P zeolite is obtained.