NDLI: Preparation of polysaccharide-coated nanoparticles by emulsion polymerization of styrene

Content Provider	Springer Nature Link
Author	Ladaviere, C. Averlant Petit, M. C. Fabre, O. Durand, A. Dellacherie, E. Marie, E.
Copyright Year	2007
Abstract	It is the aim of this paper to describe the preparation of polysaccharide-coated nanoparticles by direct emulsion polymerization of styrene in the presence of native dextran. In spite of the lack of surface-active properties of native dextran, stable latexes with very low amount of coagulate were obtained. Particle size decreased with dextran concentration and molecular weight. The amount of permanently adsorbed dextran was determined by direct titration of the polysaccharide present on the surface of the nanoparticles. A maximum value of 2.5 mg m−2 was found. Zeta-potential measurements allowed us to estimate the thickness of the hydrophilic layer, which regularly increased with dextran aqueous concentration. The dextran-coated polystyrene nanoparticles were stable in concentrated NaCl solutions and could be redispersed after freeze-drying. The mechanism of chemical modification of dextran was studied by nuclear magnetic resonance and matrix-assisted laser desorption/ionization-time of flight spectrometry studies. Graft copolymers are supposed to be formed.
Starting Page	621
Ending Page	630
Page Count	10
File Format	PDF
ISSN	0303402X
Journal	Colloid and Polymer Science
Volume Number	285
Issue Number	6
e-ISSN	14351536
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-01-19
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Polysaccharide Emulsion polymerization In situ modification Food Science Characterization and Evaluation Materials Soft Matter, Complex Fluids Physical Chemistry Polymer Sciences
Content Type	Text
Resource Type	Article
Subject	Colloid and Surface Chemistry Materials Chemistry Physical and Theoretical Chemistry Polymers and Plastics

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