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Superparamagnetic thermoresponsive composite latex via W/O miniemulsion polymerization
Author(s) -
Lin ChiaLung,
Chiu WenYen,
Don TrongMing
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.23084
Subject(s) - miniemulsion , comonomer , polymerization , materials science , composite number , polymer chemistry , superparamagnetism , monomer , emulsion polymerization , chemical engineering , cyclohexane , composite material , chemistry , polymer , organic chemistry , physics , magnetization , quantum mechanics , magnetic field , engineering
In this research, the thermoresponsive composite latex particles were prepared via W/O miniemulsion polymerization. Fe 3 O 4 nanoparticles were homogeneously dispersed inside the poly(NIPAAm‐ co ‐MAA) latex particles. In the first step, PAA oligomers were used as stabilizers to produce a stable water‐based Fe 3 O 4 ferrofluid, which could mix well with the water‐soluble monomers. In the second step, the Fe 3 O 4 /poly(NIPAAm‐ co ‐MAA) composite latex particles were synthesized via W/O miniemulsion polymerization. This polymerization proceeded in cyclohexane at room temperature, with Span80 as the emulsifier, NIPAAm as the thermoresponsive monomer, MAA as a comonomer with COOH functional groups, and APS/SMBS as the redox initiator system. The distribution of Fe 3 O 4 nanoparticles inside the composite latex particles was expected to be homogeneous. The nucleation and morphology of the composite latex particles were mainly controlled by the concentration of the surfactant, Span80, in cyclohexane. The properties of the composite latex were examined with several instruments such as DSC and TGA. Finally, the superparamagnetic and thermoresponsive characteristics of this functional composite latex were also investigated. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 3987–3996, 2006