双壳结构绿色电泳粒子的制备及其应用

Preparation of double-shell structure green electrophoretic particles and its application in electronic ink

采用反相微乳液-表面溶剂聚合法制备了双壳结构的绿色电泳粒子(PIB/CT/S)。采用SEM、TEM、XPS、FTIR和XRD对其进行了表征,以四氯乙烯为分散介质,PIB/CT/S为电泳粒子进行了电泳性能测试。结果表明,PIB/CT/S具有良好的球形结构,平均粒径为241.2 nm,是以二氧化硅球(S)为基体,以绿色钛酸钴(CT)为第一层包覆物,以离子液体聚合物[聚(1-乙烯基-3-十二烷基)咪唑溴(PIB)]为第二层包覆物,其密度为1.7905 g/cm^(3)。可见光漫反射测试和电子墨水涂布平台测试表明,PIB/CT/S具有较好的光学性质。制备的简易电泳显示器(EPD)的响应时间为165 ms,明显优于商用EPD(响应时间为260~300 ms)。

Double-shell structure green electrophoretic particles(PIB/CT/S)were prepared through reverse microemulsion combined with surface solvent polymerization.Then,the sample was characterized by SEM,TEM,XPS,FTIR and XRD,and the electrophoretic properties were tested with tetrachloroethene as dispersive medium and PIB/CT/S as electrophoretic particles.The results showed that PIB/CT/S had a good spherical structure with an average particle size of 241.2 nm with a density of 1.7905 g/cm^(3).The electrophoretic particles were composed by silica spheres(S)as matrix,green cobalt titanate(CT)as the first coating and ionic liquid polymer[poly(1-vinyl-3-dodecyl)imidazolium bromide(PIB)]as the second coating.The visible light diffuse reflection test and electronic ink coating platform test indicated that PIB/CT/S exhibited good optical properties.The response time of the prepared simple electrophoretic display(EPD)was 165 ms,which was significantly better than that of commercial EPDs(response time 260~300 ms).