Chitosan (CS) and alginate (Alg) are complementary in their membrane performance, but the combination of them is normally difcult to use due to their different solubilities. Layer-by-Layer deposition appears to be an effective method for improving the separation efciency of a composite membrane. In this work, the polyelectrolyte multilayer composite membranes (PEMCMs) wer...

Polyelectrolytes interact strongly with oppositely charged colloid particles. This phenomenon takes many forms: colloid flocculation in water treatment and paper-making,l stabilization of colloidal suspensions,2 association of DNA with basic protein^,^ and complexation of proteins with synthetic polyelectrolyte^.^ The consequences of these interactions are similarly varied; they may lead to pre...

The system comprised of poly(dimethyldially1ammonium chloride) (PDMDAAC) and oppositely charged mixed micelles of Triton X-100 (TXlOO) and sodium dodecylsulfate (SDS) displays several states, including coacervate and various soluble complexes. The phase boundary for the equilibrium between soluble complexes and coacervate (“associative phase separation” according to Piculell and Lindman) for 0....

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Changes in the conformation of the polyelectrolytes when contacted with oppositely charged polyelectrolytes or when subjected to shifts in solution conditions (pH), have been studied in this work along with reversibility of the changes using fluorescence spectroscopy. While changes due to both of the above are marked, they are measurably different from each other. Thus, the extent of coiling of...

Die elektrostatische Wechselwirkung dominiert die Adsorption von Polyelektrolyten an Oberflächen, die Bildung von Komplexen und die Bindung von Liganden an Makromoleküle. Die effektive Ladung von Polyelektrolyten wird durch die nominelle Ladungsdichte und die Gegenionenkondensation, die vom umgebenden Medium abhängt, bestimmt. Elektrophorese-NMR zusammen mit DiffusionsNMR erlaubt es, die effekt...

Submitted for the MAR15 Meeting of The American Physical Society A molecular simulation study on salt response of polyelectrolyte complexes HANNE ANTILA, Aalto University, Department of Chemistry, PAUL VAN TASSEL, Yale University, Chemical and Environmental Engineering, MARIA SAMMALKORPI, Aalto University, Department of Chemistry — In aqueous solutions, oppositely charged polymers, polyelectrol...

In the first part of this paper we describe recently discovered structures in self-assemblies of charged membranes complexed with the biological polyelectrolyte DNA. These complexes are currently used in medical applications of non-viral gene delivery. The second part of the paper will describe entirely new experiments where liquid crystal and biological polymers are confined on lithographicall...

We investigate theoretically the phase diagram of an insoluble charged surfactant monolayer in contact with a semidilute polyelectrolyte solution (of opposite charge). The polyelectrolytes are assumed to have long-range and attractive (electrostatic) interaction with the surfactant molecules. In addition, we introduce a short-range (chemical) interaction which is either attractive or repulsive....