Yun Ki Myoung, Suryamas Adi Bagus, Hirakawa Chika, Iskandar Ferry, Okuyama Kikuo
Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan.
Langmuir. 2009 Sep 15;25(18):11038-42. doi: 10.1021/la901343j.
A new physical route for the production of monodispersed microsphere nanoparticle-polymer composites utilizing a beads milling method, followed by an electrospray method, has been developed. Poly(methyl methacrylate) (PMMA)-TiO2 composites were used as a model to evaluate the performance of this route. SEM images showed that the products were monodispersed, spherical, and nonagglomerate. The mean diameter was in the range of 0.25-1.87 microm, with a standard deviation of 0.06-0.172. TEM images confirmed that nonagglomerated TiO2 nanoparticles were highly dispersed inside the polymer matrices. We found that the concentration ratio of TiO2 to polymer in the precursor led to changes in precursor properties, such as permittivity and electrical conductivity, and resulted in changes in the produced particle size.
一种利用珠磨法生产单分散微球纳米颗粒-聚合物复合材料的新物理路线已被开发出来，该路线随后采用电喷雾法。以聚甲基丙烯酸甲酯（PMMA）-二氧化钛（TiO₂）复合材料作为模型来评估此路线的性能。扫描电子显微镜（SEM）图像显示，产物呈单分散、球形且无团聚现象。平均直径在0.25至1.87微米范围内，标准偏差为0.06至0.172。透射电子显微镜（TEM）图像证实，未团聚的TiO₂纳米颗粒高度分散在聚合物基质内部。我们发现，前驱体中TiO₂与聚合物的浓度比导致前驱体性质（如介电常数和电导率）发生变化，并致使所生产颗粒尺寸发生改变。
