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Structural Characterization of Mannan Cell Wall Polysaccharides in Plants Using PACE
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Sorption of anionic polysaccharides by cellulose.
Uttam C Paul1, Avinash P Manian1, Barbora Široká1
1Research Institute of Textile Chemistry/Physics, University of Innsbruck, Hoechsterstrasse 73, 6850 Dornbirn, Austria.
Carbohydrate Polymers
|October 19, 2021
Summary
Calcium ions facilitate the binding of anionic polysaccharides like pectin, alginate, and xanthan to cellulose fibers. This interaction is crucial for understanding biological functions and developing new technological applications.
Area of Science:
- Materials Science
- Biochemistry
- Polymer Chemistry
Background:
- Cellulose, a widely available biopolymer, can be modified to enhance its functionality.
- Anionic polysaccharides (pectin, alginate, xanthan) are complex carbohydrates with diverse applications.
- Calcium ions are known to interact with both cellulose and polysaccharides.
Purpose of the Study:
- To investigate the sorption of anionic polysaccharides onto cellulose in the presence of calcium.
- To quantify the binding of calcium and polysaccharides to cellulose fibers.
- To elucidate the mechanism of interaction between polysaccharides, cellulose, and calcium.
Main Methods:
- Atomic Absorption Spectroscopy (AAS) for calcium quantification.
- Chemical Oxygen Demand (COD) analysis for polysaccharide binding.
- Fourier Transform Infrared Spectroscopy-Attenuated Total Reflectance (FTIR-ATR) for chemical characterization.
- Alizarin dyeing experiments to confirm calcium presence.
Main Results:
- Calcium sorption to cellulose is limited by the carboxyl group content of the fibers.
- Calcium ions effectively bind anionic polysaccharides to cellulose fibers.
- Quantified binding amounts: 5.8-12.5mM Ca2+/kg fibers and 1500-2400mg polysaccharide/kg fibers.
- FTIR-ATR and alizarin dyeing confirmed the successful modification of cellulose fibers.
Conclusions:
- Divalent calcium ions mediate the sorption of anionic polysaccharides onto cellulose.
- This interaction mechanism is fundamental for understanding biological processes and developing advanced material applications.
- The carboxyl group content of cellulose influences calcium binding capacity.
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