Stress development during drying of calcium carbonate suspensions containing carboxymethylcellulose and latex particles

Pär Wedin, Carlos J. Martinez, Jennifer A. Lewis, John Daicic, Lennart Bergström

Research output: Contribution to journalArticlepeer-review


Stress development during drying of coatings produced from aqueous dispersions of calcium carbonate particles in the presence and absence of organic binders was studied using a controlled-environment stress apparatus that simultaneously monitored drying stress, weight loss, and relative humidity. Specifically, the influence of two organic binders on drying stress evolution was investigated: (1) carboxymethylcellulose, a water-soluble viscosifying aid, and (2) a styrene-butadiene latex emulsion of varying glass transition temperature. The stress histories exhibited three distinct regions. First, a period of stress rise was observed, which reflected the capillary tension exerted by the liquid on the particle network. Second, a maximum stress was observed. Third, it was followed by a period of either stress decay or rise depending on the organic species present. Significant differences in stress histories were observed between coatings containing soluble and nonsoluble binders. Maximum drying stresses (σmax) of 0.2-0.5 MPa were observed for coatings produced from pure calcium carbonate or calcium carbonate-latex suspensions, whereas coatings with carboxymethylcellulose exhibited substantially higher σmax values of 1-2 MPa. Upon drying, these coatings were quite hygroscopic, such that cyclic variations in relative humidity induced large cyclic changes in residual stress.

Original languageEnglish (US)
Pages (from-to)1-9
Number of pages9
JournalJournal of Colloid And Interface Science
Issue number1
StatePublished - Apr 1 2004


  • Calcium carbonate
  • Carboxy methylcellulose
  • CMC
  • Drying
  • Latex
  • Paper coating
  • PCC
  • Stress evolution

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry
  • Surfaces and Interfaces


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