胶体相互作用对颜料涂层结构形成的影响。

Influence of colloidal interactions on pigment coating layer structure formation.

作者信息

Sand Anders, Toivakka Martti, Hjelt Tuomo

机构信息

Laboratory of Paper Coating and Converting, and Center for Functional Materials, Abo Akademi University, Porthaninkatu 3, 20500 Turku, Finland.

出版信息

J Colloid Interface Sci. 2009 Apr 15;332(2):394-401. doi: 10.1016/j.jcis.2009.01.005. Epub 2009 Jan 10.

DOI:10.1016/j.jcis.2009.01.005

PMID:19176226

Abstract

The consolidation of pigment coating layers was simulated using a three-dimensional particle dynamics model. The model included hydrodynamic interactions as well as colloidal force models and the Brownian motion. The impact of various colloidal model parameters on the z-direction solids profile development and coating layer thickness was investigated. Also, the influence of continuous (liquid) phase viscosity was tested. Particle systems resembling a polydisperse ground calcium carbonate (GCC) distribution were studied. Results show that a lower particle surface potential on pigments increased the thickness of the coating layer, while the electrostatic double layer thickness influenced the internal coating structure. An increased viscosity of the continuous phase slowed the consolidation down, but did not have a significant impact on the final microstructure. The work contributes to the understanding of the influence of colloidal system properties on the consolidation and structure development of coating layers. The results may aid in the understanding of the impact of chemical additives on coating layer structure formation.

摘要

使用三维粒子动力学模型模拟了颜料涂层的固结过程。该模型包括流体动力学相互作用、胶体力模型和布朗运动。研究了各种胶体模型参数对z方向固体分布发展和涂层厚度的影响。此外，还测试了连续（液体）相粘度的影响。研究了类似于多分散重质碳酸钙（GCC）分布的颗粒系统。结果表明，颜料上较低的颗粒表面电位增加了涂层厚度，而静电双层厚度影响了涂层内部结构。连续相粘度的增加减缓了固结过程，但对最终微观结构没有显著影响。这项工作有助于理解胶体系统性质对涂层固结和结构发展的影响。结果可能有助于理解化学添加剂对涂层结构形成的影响。