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Nickel(II) silicates and oxides – highly dispersed green pigments

Article Information:

Title:

Nickel(II) silicates and oxides – highly dispersed green pigments

Author(s):

B. Klapiszewska, A. Krysztafkiewicz, T. Jesionowski

Journal:

Pigment & Resin Technology

Year:

2005

Volume:

34

Issue:

3

Page:

139 - 147


ISSN:

0369-9420


DOI:

10.1108/03699420510597983

Publisher:

Emerald Group Publishing Limited

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Abstract:

Purpose – The study reported here concerned production of green pigments, hydrated nickel(II) silicates and oxides, obtained by precipitation from solutions of sodium metasilicate and sodium hydroxide using nickel(II) sulphate.

Design/methodology/approach – The pigments were analysed using a number of techniques including scanning electron microscopy for particle surface morphology and dynamic light scattering for particle structure and the tendency of the particles to agglomerate.

Findings – The most desirable physicochemical parameters were shown by highly dispersed nickel(II) silicates precipitated in presence of the modifying agents. Silicate pigments precipitated in the presence of Rokanol K-7 had low bulk densities, a high capacity to absorb water, dibutyl phthalate and paraffin oil within the primary particles, which is particularly noteworthy.

Practical implications – Due to their good dispersibility, well developed surface and appropriate coating power, coloured silicates of, e.g. chromium(III) and nickel(II) may be used as pigments and fillers for surface coatings.

Originality/value – The method of obtaining nickel(II) pigments developed was novel and provided a solution for problem of post-galvanic nickel solutions.

Keywords:

Pigments, Silicates, Surface chemistry


Article Type:

Research paper


Article URL:

http://www.emeraldinsight.com/10.1108/03699420510597983

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