功能单分子在界面的自组装及其对界面疏水性的修饰

he self-assembling of single macromolecule is superior to that of multi macromolecules in enhancing functionalities due to stability of structure and insensitivity of assembling to concentration. Herein, multi-branched comb-like functional macromolecules are prepared through "grafting from" strategy via combination of ROMP and RAFT living polymerization in which back-bones are synthesized by living ROMP of norbornene derivative anchored with RAFT agent and branched chains are grafted by subsequent RAFT polymerization of hydrophilic 4-vinylpridine and hydrophobic tert-butyl acrylate. The molecular weights of these comb-like functional macromolecules are so great that they can self-assembly into arrays similar to the strcture of lotus leaf cuticle on solid surface in the form of single molecule. The comb-like macromolecules with hydrophilic poly(4-vinylpridine) branches are more effective to improve surface hydrophobicity because of the stronger interaction between substrate and poly(4-vinylpridine) branches. Self-assembling of single macromolecules on surface provides a potential feasible method to modify surface hydrophobic property.