Amphiphilic Dendrimer

摘要

Dendrimers, which are dendritic polymers, behave as amphiphilic molecules, if their core, repeating, or termina1 unit is properly modified. Amphiphilic dendrimers are classified as head-tail block, surface block, and layer block dendrimers, star-shaped dendrimers, dendritic star polymers, polymer dendrons, and the like. Head-tail block and surface bIock dendrimers have bending points, that is, critical micelle concentrations on surface tension-concentration curves and aggregate into micelles in solution. Amphiphilic dendrimers also form bilayers, liquid crystals, and Langmuir monolayers. Amphiphilic dendrimers have the unique feature of remarkable molecular ordering in the film adsorbed on a solid surface, in contrast to those that are isotropic such as the poly(amido amine) dendrimer. The encapsulation of solvents and/or small molecules differs according to the blocks of amphiphilic dendrimer.