Mechanism of polyacrylamide-bentonite - microparticulate retention aids

T. Asselman, B. Alince, G. Garnier, T. G.M. Van De Ven

Research output: Contribution to journalConference articleResearchpeer-review

28 Citations (Scopus)


The use of microparticulate retention aids was investigated in three different papermaking systems: the deposition of PCC on kraft fibers, flocculation of TMP fibers and the deposition of fines on TMP fibers. It is shown that montmorillonite significantly increases both particle deposition and fiber flocculation. This is attributed to a higher bond strength in the presence of a microparticle. The role of the microparticles is to provide links between adsorbed polymer layers. The bond strengthening is explained by the asymmetric nature of an adsorbed polymer layer.

Original languageEnglish
Pages (from-to)515-519
Number of pages5
JournalNordic Pulp & Paper Research Journal
Issue number5
Publication statusPublished - 1 Dec 2000
Externally publishedYes
EventPaper and Coating Chemistry Symposium 2000 - Stockholm, Sweden
Duration: 6 Jun 20008 Jun 2000


  • Bentoinite
  • Fiber flocculation
  • Filler retention
  • Fines retention
  • Kinetics of deposition
  • Microparticulate retention aid systems
  • Montmorillonite
  • Polyacrylamide

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