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Cellulose

, Volume 23, Issue 5, pp 2819–2829

First Online: 06 July 2016Received: 30 March 2016Accepted: 24 June 2016

Abstract

Interactions among cellulose, hemicellulose and pectins are important for plant cell wall assembly and properties and also for industrial applications of these polysaccharides. Therefore, binding of pectin and xyloglucan on microcrystalline cellulose was investigated in this experiment by adsorption isotherms, zeta potential and scanning electron microscopy SEM. Analysis of three isotherm models Langmuir, Freundlich and Fowler-Guggenheim isotherms showed that the experimental adsorption isotherm was well described via the Fowler-Guggenheim model, which includes lateral interaction between the adsorbate. The adsorption isotherm and zeta potential measurement showed that at temperature 25 °C only xyloglucan adsorbed on the microcrystalline cellulose. In case of xyloglucan on cellulose, the equilibrium was reached in about 3–4 h, and the kinetics of adsorption were well described by the multiexponential equation. Analysis of the model suggests that two steps can be distinguished: diffusion and reconformation in an adsorbed layer. No adsorption of pectin was observed in this study. SEM study showed that xyloglucan may prevent cellulose from aggregation.

KeywordsAdsorption Cellulose Pectin Xyloglucan Kinetics Equilibrium  Download fulltext PDF



Autor: Dawid Myśliwiec - Monika Chylińska - Monika Szymańska-Chargot - Stanisław Chibowski - Artur Zdunek

Fuente: https://link.springer.com/



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