Synthesis of liquid-filled nanocapsules via the miniemulsion technique
Date
2010
Authors
Van Den Dungen E.T.A.
Klumperman B.
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
This study describes the synthesis of well-defined nanocapsules via the miniemulsion technique. Pentaerythritol tetrakis(3-mercaptopropionate) (TetraThiol) or 1,6-hexanediol di(endo, exo-norborn-2-ene-5-carboxylate) (DiNorbornene) is used as the oil phase. TetraThiol is encapsulated via the miniemulsion technique without polymerization, as this monomer would simultaneously act as a chain-transfer agent, and DiNorbornene is encapsulated via miniemulsion polymerization of styrene. Various styrene-maleic anhydride (PSMA) copolymers and poly(styrene-maleic anhydride)-block-polystyrene (PSMA-b-PS) block copolymers were used as surfactant for the synthesis of well-defined nanocapsules with TetraThiol as the core material. The nanocapsules had a diameter of 150-350 nm and the particle size distribution was narrow. The use of PSMA-b-PS block copolymers as surfactant in combination with post-addition of formaldehyde provided improved stability to the nanocapsules. DiNorbornene was encapsulated via miniemulsion polymerization of styrene, and a stable latex with a bimodal particle size distribution was obtained. The distribution of small particles had a size of 60 nm and the distribution of large particles had a size of 150 nm. © 2010 Wiley Periodicals, Inc.
Description
Keywords
3-mercaptopropionate, Bimodal particle size distribution, Chain-transfer agents, Core material, Large particles, Mini-emulsion polymerization, Miniemulsions, Oil phase, Reversible addition fragmentation chain transfer, Small particles, Styrene-maleic anhydride, Tetrakis, Block copolymers, Carboxylation, Copolymerization, Coremaking, Free radical polymerization, Maleic anhydride, Monopole antennas, Nanoparticles, Particle size analysis, Polymers, Polystyrenes, Self assembly, Size distribution, Styrene, Surface active agents, Nanocapsules
Citation
Journal of Polymer Science, Part A: Polymer Chemistry
48
22
48
22