Diffusion of KCl in an amylose film

Ritva Hartikainen, Matti Lindström, Pirkko Forssell (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

A method has been developed measuring the diffusion coefficient of KCl in amylose films. The films were soaked in potassium chloride solutions, then immersed in pure water and conductivity measured as a function of time. Different concentrations of the soaking solution were used and the measurements were made at several temperatures. The diffusion coefficient of KCl was found to be independent of the soaking solution KCl concentration, but found to increase with increasing temperature. The diffusion coefficient values were about one quarter of those found in water and varied from 4.8×10−10 to 11×10−10 m2 s−1. The activation energy of diffusion was close to that found in water. Two values for the activation energy were obtained, 20.1 and 14 kJ mol−1, indicating a change in the film structure at 45 °C. Amylose films swelled equally in KCl-solutions and water. The thickness of amylose films doubled and the increase in mass was 100–200% corresponding the decrease of amylose content from about 87 to 37%, when the conditions changed from normal humidity conditions to water.
Original languageEnglish
Pages (from-to)375-380
JournalCarbohydrate Polymers
Volume52
Issue number4
DOIs
Publication statusPublished - 2003
MoE publication typeA1 Journal article-refereed

Fingerprint

Amylose
Water
Activation energy
Potassium Chloride
Potassium
Atmospheric humidity
Temperature

Keywords

  • Amylose film
  • Diffusion
  • Swelling

Cite this

Hartikainen, R., Lindström, M., & Forssell, P. (2003). Diffusion of KCl in an amylose film. Carbohydrate Polymers, 52(4), 375-380. https://doi.org/10.1016/S0144-8617(03)00012-2
Hartikainen, Ritva ; Lindström, Matti ; Forssell, Pirkko. / Diffusion of KCl in an amylose film. In: Carbohydrate Polymers. 2003 ; Vol. 52, No. 4. pp. 375-380.
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Hartikainen, R, Lindström, M & Forssell, P 2003, 'Diffusion of KCl in an amylose film', Carbohydrate Polymers, vol. 52, no. 4, pp. 375-380. https://doi.org/10.1016/S0144-8617(03)00012-2

Diffusion of KCl in an amylose film. / Hartikainen, Ritva; Lindström, Matti; Forssell, Pirkko (Corresponding Author).

In: Carbohydrate Polymers, Vol. 52, No. 4, 2003, p. 375-380.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Diffusion of KCl in an amylose film

AU - Hartikainen, Ritva

AU - Lindström, Matti

AU - Forssell, Pirkko

PY - 2003

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N2 - A method has been developed measuring the diffusion coefficient of KCl in amylose films. The films were soaked in potassium chloride solutions, then immersed in pure water and conductivity measured as a function of time. Different concentrations of the soaking solution were used and the measurements were made at several temperatures. The diffusion coefficient of KCl was found to be independent of the soaking solution KCl concentration, but found to increase with increasing temperature. The diffusion coefficient values were about one quarter of those found in water and varied from 4.8×10−10 to 11×10−10 m2 s−1. The activation energy of diffusion was close to that found in water. Two values for the activation energy were obtained, 20.1 and 14 kJ mol−1, indicating a change in the film structure at 45 °C. Amylose films swelled equally in KCl-solutions and water. The thickness of amylose films doubled and the increase in mass was 100–200% corresponding the decrease of amylose content from about 87 to 37%, when the conditions changed from normal humidity conditions to water.

AB - A method has been developed measuring the diffusion coefficient of KCl in amylose films. The films were soaked in potassium chloride solutions, then immersed in pure water and conductivity measured as a function of time. Different concentrations of the soaking solution were used and the measurements were made at several temperatures. The diffusion coefficient of KCl was found to be independent of the soaking solution KCl concentration, but found to increase with increasing temperature. The diffusion coefficient values were about one quarter of those found in water and varied from 4.8×10−10 to 11×10−10 m2 s−1. The activation energy of diffusion was close to that found in water. Two values for the activation energy were obtained, 20.1 and 14 kJ mol−1, indicating a change in the film structure at 45 °C. Amylose films swelled equally in KCl-solutions and water. The thickness of amylose films doubled and the increase in mass was 100–200% corresponding the decrease of amylose content from about 87 to 37%, when the conditions changed from normal humidity conditions to water.

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KW - Diffusion

KW - Swelling

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DO - 10.1016/S0144-8617(03)00012-2

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JF - Carbohydrate Polymers

SN - 0144-8617

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