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Miniemulsion photopolymerization in a continuous tubular reactor: particle size control via membrane emulsification
Tijdschriftbijdrage - Tijdschriftartikel
Synthesis of polymeric nanoparticles of adjustable size in the submicron-range 200-950 nm has been conductedviamembrane emulsification combined with photoinduced miniemulsion polymerization in a continuous tubular flow reactor. Monomer droplets comprising methyl methacrylate (MMA), hexadecane and the photoinitiator diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide were prepared as an aqueous emulsion with the surfactant sodium dodecyl sulfate (SDS) using fixed membrane pore sizes of 100, 200, 300 and 400 nm. Radical polymerizations were subsequently conducted by exposure of these emulsions to visible (violet) irradiation (lambda(max)= 405 nm) at room temperature in a continuous tubular flow reactor for polymerization times (residence times) as short as 10 min. Careful consideration of the SDS concentration as well as the use of an aqueous phase radical scavenger enabled design of systems providing exclusive monomer droplet nucleation (in the absence of secondary nucleation). In contrast to conventional emulsification techniques, membrane emulsification provides an energy efficient method for tuning the polymer particle size from submicron to micron range by appropriate selection of pore size.
Tijdschrift: Polymer Chemistry
ISSN: 1759-9954
Issue: 28
Volume: 11
Pagina's: 4660 - 4669
Jaar van publicatie:2020
Trefwoorden:Controlled/Living Radical Polymerization, Critical Micelle Concentration, Oil-Soluble Initiator, Emulsion Polymerization, Surfactant Concentration, Membrane Emulsification, Ionic-Strength, Styrene, Copolymerization, Nanoparticles
BOF-keylabel:ja
IOF-keylabel:ja
BOF-publication weight:6
CSS-citation score:1
Auteurs:International
Authors from:Higher Education
Toegankelijkheid:Closed