Contrast variation study of block copolymer micelles consiting of two negatively charged polyelectrolytes
Polyelectrolytes are widely used in industrial processes as anti-scaling agents, for waste water treatment or as rheology modifier in cement. They also serve as model system for natural polyelectrolytes such as proteins. The specific interaction of the charged polymer chain with oppositely charged species such as surfactants or ions is the basis for many of those applications and the industrial relevance of polyelectrolytes. Previous works on two different negatively charged polyelectrolytes showed that the interaction with multivalent cations such as Ca2+ or Ba2+ strongly depends on the chemical nature of the anionic moiety. We use this cation selectivity to self-assemble a block copolymer consisting of both polymers into well-defined micelles (c.f. figure 1B). The block copolymer shows interesting properties such as a combination of lower and upper critical solution temperature or pH responsivity. Our work aims towards a better understanding of the specific interaction of multivalent cations with polyelectrolytes but also towards the design of new responsive and schizophrenic self-assembled systems.
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CARL Nico Oliver; HUBER Klaus; MUELLER Wenke and SCHWEINS Ralf. (2018). Contrast variation study of block copolymer micelles consiting of two negatively charged polyelectrolytes. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-11-1888
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