Munekata Toshihisa, Suzuki Takahisa, Yamakawa Shunsuke, Asahi Ryoji
Toyota Central R&D Labs., Inc., Nagakute, Aichi 480-1192, Japan.
Phys Rev E Stat Nonlin Soft Matter Phys. 2013 Nov;88(5):052314. doi: 10.1103/PhysRevE.88.052314. Epub 2013 Nov 22.
Understanding the mechanisms of how colloidal solution properties and drying processes result in dry colloidal structures is essential for industrial applications such as paint, ceramics, and electrodes. In this study, we develop a computational method to simulate the drying process of colloidal suspensions containing solid particles and polymers. The method consists of a solvent evaporation model, a fluid particle dynamics method, and a two-phase lattice Boltzmann method. We determine that a high-viscosity solvent, small surface tension, and a high evaporation rate of the solvent lead to a structure with dispersed particles and interconnected pores. When these conditions are not present, the particles agglomerate and the pores are disconnected.
了解胶体溶液特性和干燥过程如何导致干燥胶体结构的机制对于油漆、陶瓷和电极等工业应用至关重要。在本研究中，我们开发了一种计算方法来模拟含有固体颗粒和聚合物的胶体悬浮液的干燥过程。该方法由溶剂蒸发模型、流体颗粒动力学方法和两相格子玻尔兹曼方法组成。我们确定，高粘度溶剂、小表面张力和高溶剂蒸发速率会导致形成具有分散颗粒和相互连通孔隙的结构。当不存在这些条件时，颗粒会团聚且孔隙会断开连接。
