合成具有特定微观表面结构的微纳米固体粒子并将其用于多组分高分子结构及性能的精细调控，对制备新型高分子复合材料具有重要意义。在项目组关于粒子化学性质、含量及形状对高分子共混物结构形成影响的研究基础上，本项目拟通过粒子包覆、种子乳液聚合等方法制备粗糙度可调的无机或高分子粒子，通过激光共聚焦扫描显微镜、流动可视化及原子力显微镜等技术深入研究粗糙度对粒子在高分子流体中的扩散动力学、相互作用及聚集行为的影响机制；考察粒子在多层高分子流体界面处的接触线牵制现象，揭示粗糙粒子的界面吸附行为及对流体界面性质的影响，考察流场下粗糙粒子调控共混物相结构形成机理及动力学的基本机制，获得粗糙粒子的增容效率对流体性质以及流场条件的依赖性。综合考察粒子各种结构参数在增容过程中的相对贡献，获得增容粒子结构设计的基本准则。通过本项目研究，进一步拓宽粒子增容理论研究的思路，推动新一代高性能多组分高分子复合材料的发展。

Micro-/nano- particles with desired surface microstructure and chemistry nature can be utilized to achieve a fine tuning of morphology and properties of polymer blends, which is of great importance for the preparation of novel polymer materials with versatile performances or functionalities. The proposed project aims to understand how the roughness of solid particles determine their compatibilization mechanism and efficiency toward immiscible polymer blends under flow. Inorganic or polymeric particles with tunable surface roughness will be synthesized via heterogeneous aggregation of colloid particles or seeded emulsion polymerization. The effect of surface roughness on the diffusion dynamics, particle-particle interaction and aggregation behavior of particles within polymeric fluids will be revealed by using in-situ confocal laser scanning microscopy, optical-shear technique and atomic force microscopy. By examining the contact-line pinning phenomenon of rough particles at the interface of two-layer polymeric fluids, the adsorption behavior of rough particles and its influence on the interfacial properties of two-layer polymeric fluids will be understood. The underlying manipulation mechanism of rough particles toward the structure formation and evolution dynamics of flowing polymer blends will be illustrated. The dependence of compatibilization efficiency of rough particles on the properties of fluids and flow conditions will be unraveled. By comparing the relative contribution of various structural parameters of particles to the structure formation of polymer blends, the basic principles in designing solid particles with excellent compatibilization efficiency will be obtained. This project will afford new insights into the fundamental theory of particle compatibilization and contribute to the advancement of relevant science and technique in multiphase polymeric composite materials.