Journal
CELLULOSE
Volume 20, Issue 4, Pages 1613-1627Publisher
SPRINGER
DOI: 10.1007/s10570-013-9965-8
Keywords
Model cellulose substrates; Xyloglucan; Xylan; Arabinogalactan; Pectin; Nitrogen adsorption
Funding
- Center for LignoCellulose Structure and Formation, an Energy Frontier Research Center
- U.S. Department of Energy, Office of Science [DE-SC0001090]
- Department of Energy [DE-FG02-93ER-20097]
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Four cellulose substrates including highly crystalline cellulose nanowhiskers (CNWs) from Gluconacetobacter xylinus (cellulose I alpha) or cotton (cellulose I beta) and amorphous cellulose derived from CNWs (phosphoric acid swollen cellulose nanowhiskers, PASCNWs) were used to explore the interaction between cellulose and well-defined xyloglucan, xylan, arabinogalactan and pectin. The binding behavior was characterized by adsorption isotherm and Langmuir models. The maximum adsorption and the binding constant of xyloglucan, xylan and pectin to any CNWs were always higher than to PASCNWs derived from the same source. The binding affinity of xyloglucan, xylan and pectin to G. xylinus cellulose was generally higher than to cotton cellulose, showing that binding interactions depended on the biological origin of cellulose and associated differences in its structure. The surface area, porosity, crystal plane and degree of order of cellulose substrate may all impact the interactions.
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