The Influence of Collective Interactions Between Colloidal Particles on Colloidal Stability

胶体颗粒之间的集体相互作用对胶体稳定性的影响

• 批准号: 9417824
• 负责人: Lutful Bhuiyan
• 金额: $ 9万
• 依托单位: University of Puerto Rico-Rio Piedras
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-01-15 至 1998-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9417824&HistoricalAwards=false
• 关键词: Influence; Collective; Interactions; Between; Colloidal

Professor Lutful Bhuiyan, University of Puerto Rico Piedras, is supported by a grant from the Theoretical and Computational Chemistry Program to continue his theoretical research on the influence of collective interactions between colloidal particles on colloidal stability. Modified Poisson-Boltzmann (MPB) theory will be used to investigate the importance of collective effects of all the charged species of a colloidal solution on the interaction between two colloidal particles. Four specific goals of the research are: 1) to adapt the MPB equation to the situation where one or more of the species is the colloidal particle so all interactions are treated on an equal footing; 2) to study the interaction between colloidal particles on concentration, size, and charge of both the colloidal particle and the simple ions; 3) determine the effect of steric interaction with solvent molecules on colloid-colloid interactions; and 4) to consider further development of the MPB approach. A fundamental understanding of the nature of interparticle forces in highly interacting colloidal dispersions does not as yet exist. It is still not well understood what keeps charged colloidal particles dispersed in water from coagulating. Because of their unusual physical properties colloidal materials have found widespread industrial use, and may in the future have important device applications. In order to design materials with desired properties, it is necessary to understand the detailed atomic level description of the strong interactions between these charged particles in solution. Bhuiyan's research is directed at a basic theory to explain these properties.

Puerto Rico Piedras大学的Lutful Bhuiyan教授获得了理论和计算化学计划的资助，继续他关于胶体颗粒之间集体相互作用对胶体稳定性影响的理论研究。修正泊松-玻尔兹曼（MPB）理论将用于研究胶体溶液中所有带电物质的集体效应对两个胶体粒子之间相互作用的重要性。该研究的四个具体目标是：1)调整MPB方程以适应一个或多个物种是胶体粒子的情况，以便平等对待所有相互作用；2)研究胶体粒子与简单离子的浓度、大小、电荷等相互作用；3)确定与溶剂分子的空间相互作用对胶体-胶体相互作用的影响；以及4)考虑进一步发展MPB方法。对高度相互作用的胶体分散体中粒子间力的本质还没有一个基本的认识。是什么使带电的胶体颗粒分散在水中而不凝固，目前还不清楚。由于胶体材料不同寻常的物理性质，它已被广泛地应用于工业，并可能在未来有重要的器件应用。为了设计具有理想性能的材料，有必要了解溶液中这些带电粒子之间强相互作用的详细原子水平描述。Bhuiyan的研究是针对一个基本理论来解释这些特性。