Sunday, June 17, 2012

Efficient Formation of Multicompartment Hydrogels by Stepwise Self-Assembly of Thermoresponsive ABC Triblock Terpolymers

Can Zhou, Marc A. Hillmyer, and Timothy P. Lodge Journal of the American Chemical Society Article ASAP

Abstract Image

This article compares the gelation of ABA and ABC tri-block copolymers. They find that their ABC tri-block polymers form gels at lower concentrations (2-5 wt%) as well as exhibit sharper sol-gel transitions. They claim that this is due to lack of loop formation between the two dissimilar hydrophobic ends of the tri-block as compared with tri-block polymers with similar hydrophobic ends. This exclusive bridging leads to a two-step gelation process where a micelle is formed first, followed by gelation. Cryo-TEM studies support the formation of a two-compartment network.

No comments:

Post a Comment