摘要
A facile and efficient method has been developed for microencapsulation of metal oxide nanoparticles in polyurea via interfacial polymerization of toluene-2,4-diisocyanate and H20 through the atomizing emulsification approach. The resultant microcapsules were well-shaped and uniform sphere with diameter ranging from 2 to 6 um. Thermogravimetry （TG） and differential scanning calorimetry （DSC） curves revealed that the microcapsules showed good thermal stability （no decomposition observed under 245℃）. Besides, the microencapsulated TiC2 has been used as an efficient catalyst for photocatalytic degradation of methyl orange. Furthermore, the photocatalysis of immobilized TiC2 could be enhanced by introducing UV absorbing agent to the wall of microcapsules.
一个灵巧、有效的方法通过把分裂成原子的乳化途径经由 toluene-2,4-diisocyanate 和 H2O 的界面聚合在 polyurea 为金属氧化物 nanoparticles 的微封装被开发了。结果的微囊是有直径从 2 ～ 6 μ m .Thermogravimetry (TG )的塑造得好、一致的范围，微分扫描热量测定(DSC ) 曲线表明微囊显示出好热稳定性(在 245 ° C 下面观察的没有分解) 。而且，微包含的 TiO2 为相片被用作有效催化剂甲基橙的催化降级。而且，使不能调动的 TiO2 的光催化能被把紫外吸收代理人介绍给微囊的墙提高。
基金
Supported by the National Natural Science Foundation of China （20576045） and the Program for New Century Excellent Talents in University （NCET-06-740）.
