What are polyelectrolyte multilayers?
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What are polyelectrolyte multilayers?
Polyelectrolyte multilayers are thin organic films obtained by self-assembly of PEs with other charged/uncharged (macro)molecules using a LbL method. The physical and chemical architecture of PEMs can be determined from the nanoscopic level to the macroscopic level.
What is a polyelectrolyte used for?
Polyelectrolytes – the flocculation agents Polyelectrolytes are chemical flocculants used in water treatment; they act mainly in the coagulation-flocculation stage and in the conditioning/thickening of the sludge line.
What is polyelectrolyte effect?
Early in the 1940s Fuoss [5] defined a phenomenon called “polyelectrolyte effect”, i.e. reduced viscosity of polyelectrolyte solutions increases as the solution is diluted, which is totally different from that of neutral polymers.
How many types of polyelectrolyte are there?
two types
Polyelectrolytes are ionizable polymers that change their polymeric conformations upon their environmental changes. They are of two types: strong and weak polyelectrolytes. Strong polyelectrolytes are charged over a wide pH range.
What are polyelectrolyte complexes?
Polyelectrolyte complexes (PECs) are the association complexes formed between oppositely charged particles (e.g. polymer-polymer, polymer-drug and polymer-drug-polymer). These are formed due to electrostatic interaction between oppositely charged polyions.
What is polyelectrolyte made of?
Polyelectrolyte: Polymer composed of macromolecules in which a substantial portion of the constitutional units contains ionic or ionizable groups, or both.
Is polyelectrolyte a flocculant?
Polyelectrolyte flocculants are polymers that are either branched or linear, but carrying ionic charge along their chain. They are accordingly classified as cationic, anionic or non-ionic polymers. These flocculants neutralise surface charges on cells and bind particles together by physical or chemical forces.
