Conducting polymer-coated latex particles

Advanced Materials

Volumn 12, Issue 9, 2000, Pages 671-674

  Khan, M Akif ^a   Armes, Steven P ^a  

^a UNIVERSITY OF SUSSEX   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

COATED MATERIALS; CONDUCTIVE PLASTICS; DEPOSITION; ELECTRIC PROPERTIES; MORPHOLOGY; PARTICLES (PARTICULATE MATTER); SYNTHESIS (CHEMICAL); X RAY PHOTOELECTRON SPECTROSCOPY;

CORE-SHELL MORPHOLOGY;

LATEXES;

EID: 0033751648     PISSN: 09359648     EISSN: None     Source Type: Journal    
DOI: 10.1002/(SICI)1521-4095(200005)12:9<671::AID-ADMA671>3.0.CO;2-3     Document Type: Article

References (29)

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6. Two early reports (A. Yassar, J. Roncali, F. Garnier, Polym. Commun. 1987, 28, 103; C. Liu, T. Maruyama, T. Yamamoto, Polym. J. 1993, 25, 363) purported to coat bare latexes with PPY to produce core-shell particles in the absence of any steric stabilizer. However, the composite particles were not extensively characterized and the proposed core-shell morphology was not proven in either study. Furthermore, the colloidal stability of the coated latexes was not properly investigated. In the light of DSM's control experiments, our own results (P. M. Beadle, DPhil Thesis, University of Sussex, UK 1995 and also [7]) and also the work by Omastova and co-workers (M. Omastova, Polymer 1998, 39, 6559.) these early papers must be considered of doubtful validity. As far as we are concerned, only sterically-stabilized latex particles can be coated with conducting polymers without significant loss of colloid stability. Even then, the conducting polymer overlayer thickness must be less than that of the adsorbed layer of stabilizer. In the absence of polymeric stabilizer, macroscopic precipitation of the latex invariably occurs.
7. Two early reports (A. Yassar, J. Roncali, F. Garnier, Polym. Commun. 1987, 28, 103; C. Liu, T. Maruyama, T. Yamamoto, Polym. J. 1993, 25, 363) purported to coat bare latexes with PPY to produce core-shell particles in the absence of any steric stabilizer. However, the composite particles were not extensively characterized and the proposed core-shell morphology was not proven in either study. Furthermore, the colloidal stability of the coated latexes was not properly investigated. In the light of DSM's control experiments, our own results (P. M. Beadle, DPhil Thesis, University of Sussex, UK 1995 and also [7]) and also the work by Omastova and co-workers (M. Omastova, Polymer 1998, 39, 6559.) these early papers must be considered of doubtful validity. As far as we are concerned, only sterically-stabilized latex particles can be coated with conducting polymers without significant loss of colloid stability. Even then, the conducting polymer overlayer thickness must be less than that of the adsorbed layer of stabilizer. In the absence of polymeric stabilizer, macroscopic precipitation of the latex invariably occurs.
8. Two early reports (A. Yassar, J. Roncali, F. Garnier, Polym. Commun. 1987, 28, 103; C. Liu, T. Maruyama, T. Yamamoto, Polym. J. 1993, 25, 363) purported to coat bare latexes with PPY to produce core-shell particles in the absence of any steric stabilizer. However, the composite particles were not extensively characterized and the proposed core-shell morphology was not proven in either study. Furthermore, the colloidal stability of the coated latexes was not properly investigated. In the light of DSM's control experiments, our own results (P. M. Beadle, DPhil Thesis, University of Sussex, UK 1995 and also [7]) and also the work by Omastova and co-workers (M. Omastova, Polymer 1998, 39, 6559.) these early papers must be considered of doubtful validity. As far as we are concerned, only sterically-stabilized latex particles can be coated with conducting polymers without significant loss of colloid stability. Even then, the conducting polymer overlayer thickness must be less than that of the adsorbed layer of stabilizer. In the absence of polymeric stabilizer, macroscopic precipitation of the latex invariably occurs.
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