基于界面超分子主客体识别作用的仿生自修复水润滑研究

通过界面超分子主客体识别作用，成功地将端金刚烷基聚甲基丙烯酸3-磺酸丙酯钾分子组装到接枝环糊精分子的硅片表面；通过原子力显微镜，表面元素分析，膜厚变化，表面润湿特性等手段证实该聚合物的成功组装. 通过摩擦试验证实:表面组装端金刚烷基聚甲基丙烯酸3-磺酸丙酯钾分子后，在轻载条件下，具有极低的摩擦系数，呈现流体润滑状态；而在高载荷条件下，可能是由于表面组装的聚合物被部分剪切掉而呈现较高的摩擦系数. 更重要的是，基于这种超分子作用间的可逆的非共价相互作用，该表面可呈现一种自修复的润滑效果，即在部分端金刚烷基聚甲基丙烯酸3-磺酸丙酯钾分子被剪切掉后，在客体大分子稀溶液中自组装后可再次获得低摩擦系数状态。 

Bionic Self-Healing Aqueous Lubrication Based on Interfacial Supramolecular Host-guest Interaction

In this study, the adamantyl poly 3-sulfopropyl methacrylate potassium was successfully assembled onto the surface of cyclodextrin through the supramolecular host-guest recognition. The micro-topography, chemical composition, thickness and wettability of surface were detected to confirm the successful recognition and assembly. The frictional experiment of hydrophilic supramolecular substrate was implemented by reciprocating friction testing machine. The friction results showed an ultralow friction coefficient after assembling hydrophilic polymer ended with guest molecule under low load condition, but the friction coefficient became high under high load condition because the hydrophilic polymer may be sheared off from the supramolecular interface. More importantly, the surface not only owned ultralow friction coefficient but showed recoverability when friction failed under high load because of the non-covalent interaction between the guest and host groups.