环状高分子对胶体稳定性影响的理论研究
Theoretical Study on Effects of Ring-Like Polymer on Colloidal Stability
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摘要: 将改进的基本度量理论与热力学微扰理论相结合,提出了胶体/高分子系统排空相互作用的IRDFT理论。该理论解释了在实际胶体系统中起重要作用的排斥体积效应和高分子链内相关性的竞争机制。应用该IRDFT,分别以线性链状和环状结构的高分子及其单体为排空元,计算了不同排空元条件下的胶体间排空相互作用。研究表明:对于絮凝破坏,自由环状高分子具有更大的优势。Abstract: Modified fundamental measure theory and thermodynamic perturbation theory are combined to construct the insert-route density functional theory(IRDFT) about the depletion force(between) colloids dispersed in an athermal polymer solution.The theory explains