Surface modification for polystyrene colloidal particles with controlled charge densities.
A significant amount of polystyrene sulfonated acid (PSSA) and poly(styrene-ran-acrylic acid) (PSAA) random copolymer can be adsorbed by dispersion of PS particles via a swelling-quenching process. A THF-water mixed solvent was used in the swelling process and a large amount of pure water was used, to give a low concentration of THF% in quenching process. Our results showed that functional PSSA groups were randomly and tightly adsorbed to the PS particles. When the mol.% of charged segments was increased, the progressive adsorption of PSSA chains to the PS particles leads to an increase in the electrophoretic mobility and zeta-potential of aqueous dispersions. Thus, we were able to obtain well-distributed surface charge density on the PS particles.
Department of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 500-712, Korea.
Jongman
J
Lee
Oh-Sun
OS
Kwon
Kwanwoo
K
Shin
Ju-Myung
JM
Song
Joon-Seop
JS
Kim
Young-Soo
YS
Seo
Giyoong
G
Tael
Sangyong
S
Jon
D000180:Acrylic Resins / Q000737:chemistry*; D003102:Colloids / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D011137:Polystyrenes / Q000737:chemistry*; D055672:Static Electricity; D013499:Surface Properties
D000180:Acrylic Resins; D003102:Colloids; D046911:Macromolecular Substances; D011137:Polystyrenes; C006903:carbopol 940