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Grapherence [¯ 1]
An improved X-ray diffraction method for cellulose crystallinity measurement.
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Abstract
Ju X
We show in this work a modified X-ray diffraction method to determine cellulose crystallinity index (CrI). Nanocrystalline cellulose (NCC) derived from bleached wood pulp was used as a model substrate. Rietveld refinement was applied with consideration of March-Dollase preferred orientation at the (001) plane. In contrast to most previous methods, three distinct amorphous peaks identified from new model samples which used to calculate CrI. A 2 theta range from 10° to 75° was found to be more suitable to determine CrI and crystallite structural parameters such as d-spacing and crystallite size. This method enables a more reliable measurement of CrI of cellulose and may be applicable to other types of cellulose polymorphs.
Bowden M Brown EE Zhang X
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Ju X Follow , Bowden M Follow , Brown EE Follow , Zhang X Follow
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Carbohydrate polymers 123: 2015 Jun 5 pg 476-81
Pub Type(s) Journal Article Research Support, Non-U.S. Gov't
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