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<p>We studied the titration behavior and the zeta potential behavior of TEMPO-oxidized CNF. The carboxylic groups at the CNF surface provide the non-linear response to the addition of acidic and basic titrants with equivalent points estimated as pH=3.54 (acidic) and pH=6.87 (basic). Surface charge and surface potential of CNF can be estimated from the fitted titration curve. Electric potentials at various scaled distances from the CNF surface and measured zeta potentials are in good agreement if we assume that the slipping plane is located at about 3.2 Debye lengths from the CNF surface.</p>

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Zeta Potential of Cellulose Nanofibrils as a Function of pH

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • A. A. Novikov,
  • A. A. Kuchierskaya,
  • N. E. Zaytseva,
  • E. Smirnov,
  • A. Vishnevich,
  • D. V. Voronin

摘要

We studied the titration behavior and the zeta potential behavior of TEMPO-oxidized CNF. The carboxylic groups at the CNF surface provide the non-linear response to the addition of acidic and basic titrants with equivalent points estimated as pH=3.54 (acidic) and pH=6.87 (basic). Surface charge and surface potential of CNF can be estimated from the fitted titration curve. Electric potentials at various scaled distances from the CNF surface and measured zeta potentials are in good agreement if we assume that the slipping plane is located at about 3.2 Debye lengths from the CNF surface.