Dispersion mechanisms of Arabic gum in the preparation of ultrafine silver powder

Finely divided silver micro-spheres were prepared with Arabic gum (AG) as dispersant through the chemical reaction of AgNO 3 and ascorbic acid. AG dispersive mechanisms in the preparation of silver powder are proposed in the paper. The -COOH and -NH 2 groups of AG reacted with Ag + to form Ag + -AG...

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Bibliographic Details
Published inThe Korean journal of chemical engineering Vol. 31; no. 8; pp. 1490 - 1495
Main Authors Li, Yingfen, Gan, Weiping, Liu, Xiaogang, Lin, Tao, Huang, Bei
Format Journal Article
LanguageEnglish
Published Boston Springer US 01.08.2014
한국화학공학회
Subjects
Biotechnology
Catalysis
Chemistry
Chemistry and Materials Science
Fluidization
Industrial Chemistry
Industrial Chemistry/Chemical Engineering
Materials Science
Particle Technology
Polymer
화학공학
Sphere
Arabic Gum
Dispersive Mechanism
Chemical Reduction
Silver Powder
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Summary:Finely divided silver micro-spheres were prepared with Arabic gum (AG) as dispersant through the chemical reaction of AgNO 3 and ascorbic acid. AG dispersive mechanisms in the preparation of silver powder are proposed in the paper. The -COOH and -NH 2 groups of AG reacted with Ag + to form Ag + -AG complexes, followed by the nucleation of silver on AG polymer chains, which yielded silver spheres with an AG protection layer by reducing Ag + -AG complexes with ascorbic acid. With the steric effect of AG, the prepared silver particles exhibit improved dispersibility. UV-Vis and FTIR spectra confirmed that silver particles were stabilized by AG.
Bibliography:G704-000406.2014.31.8.012
ISSN:0256-1115
1975-7220
DOI:10.1007/s11814-014-0069-4