物理化学学报2011，Vol.27Issue(4)：815-824,10.
油纸复合介质中水分子扩散行为的分子动力学模拟
Molecular Dynamics Simulation of the Diffusion Behavior of Water Molecules in Oil and Cellulose Composite Media
摘要
Abstract
The diffusion behaviors of water molecules in oil-cellulose composite media were studied at different temperatures using a molecular dynamics simulation. By analyzing the formation of hydrogen bonds between the water molecules and cellulose we found that the water molecules that were initially present in the oil gradually spread to the cellulose, and hydrogen bonds were formed between them. The water molecules that were present in the cellulose initially also formed hydrogen bonds and were bound to cellulose molecules. By analyzing the diffusion coefficients of the water molecules at different temperatures we found that the diffusion behaviors of the water molecules in the two single-media,namely oil and cellulose, were very different because of their different polarities. The diffusion coefficients of the water molecules in the composite media were influenced greatly by the ratio of water molecules present in the oil and cellulose and a strong correlation was apparent between them. The water molecule-oil interaction energy and the water molecule-cellulose interaction energy were also strongly related to the polarities of the oil and the cellulose. The interaction energies also exhibited a strong correlation to the distribution of water molecules at different temperatures. This was the reason for the weakened influence of temperature on the diffusion coefficient of the water molecules, which was due to the different distributions of water molecules at different temperatures.关键词
分子动力学/复合介质/氢键/扩散系数/相互作用能/相关性Key words
Molecular dynamics/ Composite medium/ Hydrogen bond/ Diffusion coefficient/Interaction energy/ Correlation分类
化学化工引用本文复制引用
廖瑞金,朱孟兆,周欣,杨丽君,严家明,孙才新..油纸复合介质中水分子扩散行为的分子动力学模拟[J].物理化学学报,2011,27(4):815-824,10.基金项目
国家重点基础研究发展规划项目(973)(2009CB724505-1),国家自然科学基金(5107736)和中央高校基本科研业务费(CDJXS11152235)资助 （973）
