Synthesis of Starch Graft Copolymer Dispersant and its Application Performance in Coal-Water Slurry

Abstract:

In this study, a new starch graft copolymer dispersant for Chinese Shenhua coal-water slurry (CWS) was prepared by radical polymerization using styrene sulfonate (SSS), hydroxyethyl acrylate (HEA) and methyl acrylic acid (MAA) as graft monomers in oxidation-reduction initiator system. The apparent viscosity, static stabilization and rheology of Shenhua coal-water slurry prepared with the dispersant have been were investigated. The experimental results demonstrate that the CWS gives the minimal viscosity of 826 mPas at coal concentration of 66 wt%, dispersant dosage of 0.5 wt% and shear rate of 100 s-1. Bleeding ratio tests indicate the starch graft copolymer can stabilize the slurry. The rheological behavior of the prepared CWS can be described by the pseudo-plastic fluid model. On the basis of the above, the starch graft copolymer dispersant has broad prospect for the application for CWS.

• Periodical: Advanced Materials Research (Volumes 581-582)
• Pages: 330-333
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.581-582.330
• Online since: October 2012
• Authors: Guang Hua Zhang, Fang Zhao, Jun Guo Li
• Keywords: Apparent Viscosity, Coal-Water Slurry, Dispersant, Starch Graft Copolymer

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