摘要
为解决纳米铜粒子团聚问题,扩大其应用范围,采用微胶囊技术制备尿素-甲醛纳米铜微胶囊,形成核壳结构来提高铜纳米粒子的分散性,是比较有效的方法.样品的红外、x-射线衍射、SEM、TEM测试、分散性研究结果表明:微胶囊试样的壁材为脲醛树脂,囊芯为纳米铜,试样尺寸在500 nm左右;微胶囊修饰的纳米铜在水中的分散性较在其他溶剂中要好;纳米铜微胶囊在各种溶剂中的分散性要好于纯纳米铜;表面聚合物修饰的纳米铜能分散在极性溶剂中.
When nanocopper particles are applied, the problem of their accumulation must be solved. Therefore, to improve the dispersibility of nanocopper particles, the microcapsule technique, which is one of the most effective methods, is adopted to fabricate the polyurea-formaldehyde nanocopper microcapsules with core-shell structure. The fabricated samples were characterized by infrared spectrum, x-ray diffraction and SEM, and the dispersibility of the samples in various solvents was studied. The experimental results show that urea-formaldehyde resin is the external wall of microcapsules, the nanocopper particles are the imernal materials of microcapsules, and the average size of the nanocopper microcapsules is about 500 nm. The dispersibility of the microcapsules in water is better than in any other solvents. In various solvents, the dispersibility of the nanocopper microcapsules is better than that of unmodified copper. If ultrasonic wave is applied, the nanocopper microcapsules can better disperse in polar solvents.
出处
《沈阳工业大学学报》
EI
CAS
2007年第3期271-274,共4页
Journal of Shenyang University of Technology
基金
教育部留学回国人员科研启动基金资助项目(2006)
关键词
纳米铜
微胶囊
原位聚合
分散性
脲醛树脂
nanocopper
microcapsule
in situ polymerization
dispersibility
urea-formaldehyde resin
