(520f) The Micellization Coupled Polymerization Behavior of Sodium Conjugated Linoleate

Polymerized micelles synthesized from self-assembled aggregates of the precursor polymerizable surfactants have attracted more and more attention because they are more stable than the precursor self-assembled micelles or ordinary micelles from corresponding conventional surfactants. As its special structure, polymerized micelles have important applications in many fields, such as drug delivery carrier, microreactor and templating functional nanomaterials. In this paper, sodium conjugated linoleate (CLA-Na) was used as the precursor polymerizable surfactant, which self-assembled to form micelles in aqueous solution and followed the stable polymerized micelles of CLA-Na were obtained by initiating thermal polymerization of the micellized CLA-Na molecules. At certain concentration and pH value, the polymerization of CLA-Na polymerizable micelles was investigated in details by changing initiator, polymerization time and temperature. The pro- or post-polymerized micelles of CLA-Na were characterized and compared with each other by UV-Vis and TEM. The optimum polymerization was reaction at 60 ^oC for 6 h with APS as initiator. At pH 8.5 and when the total concentration of CLA/CLA-Na was 5×10^-3 mol/L, the polymerized micelles possessed spherical morphology and uniform diameter (D=60-80 nm).