Details

Autor(en) / Beteiligte

• Ju, Xiaohui
• Bowden, Mark
• Brown, Elvie E.
• Zhang, Xiao

Titel

An improved X-ray diffraction method for cellulose crystallinity measurement

Ist Teil von

• Carbohydrate polymers, 2015-06, Vol.123, p.476-481

Ort / Verlag

England: Elsevier Ltd

Erscheinungsjahr

2015

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •We show an improved X-ray diffraction method for cellulose crystallinity measurement.•We found 2θ range from 10 to 75° is more reliable to quantify cellulose crystallinity index.•The new method may be applicable to cellulose of different polymorphs and origins. 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.