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383. Synatschke, C.V.; Schacher, F.H.; Müller, M.; Drechsler, M.; Müller, A.H.E.: Double-layered micellar interpolyelectrolyte complexes - how many shells to a core?, Soft Matter 7, 1714 (2011) -- DOI: 10.1039/c0sm01195a

We report on the formation of double-layered micellar interpolyelectrolyte complexes (IPECs) from ABC triblock terpolymer precursor micelles and hydrophilic homo- or block copolymers. Polybutadiene-block-poly(1-methyl-2-vinyl pyridinium)-block-poly(sodium methacrylate) (PB-b-P2VPq-b-PMANa) block terpolymers form micelles in aqueous solution at high pH exhibiting a PB core, a P2VPq/PMANa intramicellar IPEC (im-IPEC) shell, and a PMANa corona, which is negatively charged. Upon mixing with either positively charged, quaternized poly(N,N-dimethylaminoethyl methacrylate) (PDMAEMAq) homopolymers or its double-hydrophilic block copolymer with poly(ethylene oxide) (PEO-b-PDMAEMAq), a further IPEC shell is formed, rendering core-shell-shell-corona aggregates. The effects of the ratio of positive to negative charges, Z+/-, the composition of the block terpolymer micelles, and the length of the added Dq block were investigated. We show that within a certain Z+/- regime stable complex micellar IPECs featuring two distinguishable IPEC shells are formed. The so-formed complex particles were analyzed by dynamic light scattering and cryogenic transmission electron microscopy.

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Related links:
  • Project: University of Bayreuth: Multicompartment micelles of block terpolymers and their interactions

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