超分子组装的剪切增稠凝胶体系的构建与界面调控的流变行为

Shear thickening fluids (STFs) can be used as liquid protective materials and so has aroused much attention. However, they have many drawbacks, such as the inconvenience in use and the performance instability because of its fluidity nature at static state. In this project, we will develop a new kind of shear thickening gel material to solve the problems, namely, it shows gel phase at static state, liquidity under low shear rate, and shear thickening property at high shear rate. The combination of supramolecular assembly in shear thickening fluid is proposed to construct shear thickening gel for the first time. The impact of gelator’s structure and concentration on its assembly behavior in STFs, and the impact of solid interfacial characters on the rheological properties of shear thickening gels will be emphatically studied. It is hoped that the rheological property can be eventually controlled. Through this study, we will achieve the convenient operability of liquid protective materials and the design principles of interface parameters having larger boundary slip (friction reduction). Therefore, the conception of “spear” and “shield” will be investigated together to finally realize “sharper spear” and “thicker shield”, which provides the relevant theoretical basis and technical support for the design and fabrication of related military equipment.

剪切增稠液体可以作为液体防护材料，备受关注，但又因其流动性带来诸多使用不便和防护性能不稳定的问题。本项目拟构建一类新的剪切增稠凝胶材料：在静置状态下无流动性，低速剪切下剪切变稀而呈现流动性，高速剪切时能够快速增稠起到防护作用。首次将超分子自组装与剪切增稠液相结合，构筑超分子组装的剪切增稠凝胶体系。研究小分子凝胶因子在剪切增稠液中的组装行为，考察分子结构、浓度等对超分子组装的影响；研究剪切增稠凝胶体系的流变学行为；重点考察界面特性对剪切增稠凝胶体系流变学的调控规律。通过本项目研究，一方面获得改善液体防护材料可操作性的途径，另一方面，获得实现更大边界滑移（减阻特性）的界面特性设计原则。同时研究“矛”“盾”的两个方面，实现“矛尖盾厚”，为相关器械的设计制造提供基础理论依据。

剪切增稠液体可以作为液体防护材料，备受关注，但又因其流动性带来诸多使用不便和防护性能不稳定的问题。本项目拟构建一类新的剪切增稠凝胶材料：在静置状态下无流动性，低速剪切下剪切变稀而呈现流动性，高速剪切时能够快速增稠起到防护作用。首次将超分子自组装与剪切增稠液相结合，构筑超分子组装的剪切增稠凝胶体系。研究小分子凝胶因子在剪切增稠液中的组装行为，考察分子结构、浓度等对超分子组装的影响；研究剪切增稠凝胶体系的流变学行为；重点考察界面特性对剪切增稠凝胶体系流变学的调控规律。通过本项目研究，一方面获得改善液体防护材料可操作性的途径，另一方面，获得实现更大边界滑移（减阻特性）的界面特性设计原则。同时研究“矛”“盾”的两个方面，实现“矛尖盾厚”，为相关器械的设计制造提供基础理论依据。