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Effects of comb copolymer PAA-g-MPEO on rheological and dispersion properties of aqueous CaCO3 suspensions

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Summary

The comb copolymer poly(acrylic acid) (PAA) grafted methoxyl poly(ethylene oxide) (MPEO) (PAA-g-MPEO) as dispersant was used in aqueous CaCO3 suspensions. The PAA-g-MPEO was adsorbed onto CaCO3particle surfaces due to the electrostatic attraction. The adsorbed amount increased with increasing PAA-g-MPEO content. The CaCO3 adsorbed PAA-g-MPEO displayed negative zeta potential. The zeta potential was more negative with increasing PAA-g-MPEO content. Addition of PAA-g-MPEO, the conductivity of aqueous CaCO3 suspensions decreased firstly, and then increased with increasing PAA-g-MPEO content. Compared to that of aqueous CaCO3 suspensions, the viscosity of aqueous CaCO3/PAA-g-MPEO suspension reduced remarkably, and the liquidity of the suspensions was improved. The dispersion of CaCO3 particles in aqueous CaCO3/PAA-g-MPEO suspensions was significantly improved due to electrostatic repulsions and steric hindrance between CaCO3 particles adsorbed PAA-g-MPEO.

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Nanjing University, 210093, Nanjing, P.R. China

    Shishan Wu, Yanling Luo, Qianping Ran & Jian Shen

  2. Jiangsu Institute, Building Science Co. LTD, 210008, Nanjing, P.R. China

    Qianping Ran

  3. Nanjing Normal University, College of Chemistry and Environment Science, 210097, Nanjing, P.R. China

    Jian Shen

Authors
  1. Shishan Wu
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  2. Yanling Luo
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  3. Qianping Ran
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  4. Jian Shen
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Correspondence to Shishan Wu.

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Wu, S., Luo, Y., Ran, Q. et al. Effects of comb copolymer PAA-g-MPEO on rheological and dispersion properties of aqueous CaCO3 suspensions. Polym. Bull. 59, 363–370 (2007). https://doi.org/10.1007/s00289-007-0768-7

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  • DOI: https://doi.org/10.1007/s00289-007-0768-7

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