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Temperature‐triggered disintegrable poly( N ‐isopropylacrylamide) nanoparticles via heterophase polymerization in the presence of tetramethylethylenediamine and sodium dodecyl sulfate
Author(s) -
Chen Yan,
Sajjadi Shahriar
Publication year - 2014
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.40781
Subject(s) - lower critical solution temperature , polymerization , sodium dodecyl sulfate , poly(n isopropylacrylamide) , monomer , zeta potential , chemical engineering , copolymer , polymer chemistry , materials science , cationic polymerization , radical polymerization , nanoparticle , chemistry , polymer , chromatography , nanotechnology , organic chemistry , engineering
In this work, polymerization of N ‐isopropylacrylamide (NIPAM) in the presence of N , N , N ′, N ′‐tetramethylethylenediamine (TEMED) and sodium dodecyl sulfate (SDS) has been studied. The ability to control the characteristics of resulting particles was investigated via varying the concentrations of monomer, SDS, and TEMED used in the polymerization. Particles formed in the absence of TEMED were not completely soluble in water below lower critical solution temperature (LCST) but were quite stable. With the help of TEMED, fully disintegrable particles in water below LCST could be produced but at the cost of low stability. Electrophoretic measurements showed a substantial decrease in zeta potential of resulting colloids due to many neutral radicals generated by TEMED. With the aid of a small amount of SDS, stable temperature‐triggered water‐disintegrable polyNIPAM particles as small as 70 nm could be obtained. However, excessive use of SDS caused the particles to swell in the course of reaction and therefore adversely affected particles size and properties. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40781.