title: Preparation of stable electroneutral nanoparticles of sodium dodecyl sulfate and branched poly(ethylenimine) in the presence of pluronic F108 copolymer.
abstract: Mixing of polyelectrolyte solutions with solutions of oppositely charged surfactants usually leads to phase separation in a certain concentration range. However, since the charge-neutralized polyelectrolyte/surfactant nanoparticles might be utilized as versatile nanocarriers of different substances, it would be desirable to prevent their aggregation for some applications. As it was revealed in earlier investigations, the complete suppression of precipitation may be achieved only in mixtures of ionic surfactants and appropriate copolymer polyelectrolytes with nonionic and ionic blocks. In this work, we present a method that could prevent phase separation in mixtures of homopolyelectrolytes and oppositely charged surfactants. Specifically, it is shown that nonaggregating electroneutral nanocomplexes of branched poly(ethylenimine) (PEI) and sodium dodecyl sulfate (SDS) can be prepared in the presence of the amphiphilic triblock copolymer Pluronic F108, provided that an adequate mixing protocol is used for preparation of the PEI/SDS/F108 mixtures.
authors: Laboratory of Interfaces and Nanosized Systems, Institute of Chemistry, Eötvös Loránd University, 1117 Budapest, Pázmány Péter sétány 1/A, Hungary.
authors: Katalin
authors: K
authors: Pojják
authors: Róbert
authors: R
authors: Mészáros
mesh_terms: D000838:Anions; D002412:Cations; D003102:Colloids / Q000737:chemistry; D004337:Drug Carriers / Q000032:analysis / Q000737:chemistry*; D004553:Electric Conductivity; D006863:Hydrogen-Ion Concentration; D008027:Light; D053758:Nanoparticles / Q000032:analysis / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D020442:Poloxamer / Q000737:chemistry*; D011094:Polyethyleneimine / Q000737:chemistry*; D053838:Scattering, Small Angle; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry*; D012996:Solutions; D055672:Static Electricity; D013499:Surface Properties; D013501:Surface-Active Agents / Q000737:chemistry
chemical_list: D000838:Anions; D002412:Cations; D003102:Colloids; D004337:Drug Carriers; D012996:Solutions; D013501:Surface-Active Agents; D020442:Poloxamer; D012967:Sodium Dodecyl Sulfate; D011094:Polyethyleneimine