An Improved X-ray Diffraction Method For Cellulose Crystallinity Measurement

Journal Article · Mon Jun 01 00:00:00 EDT 2015 · Carbohydrate Polymers, 123:476-481

DOI:https://doi.org/10.1016/j.carbpol.2014.12.071· OSTI ID:1184923

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

We show in this work a modified X-ray diffraction method to determine cellulose crystallinity index (CrI). Nanocrystalline cellulose (NCC) dervided 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 are 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.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1184923
• Report Number(s): PNNL-SA-108288; 46009; KP1704020
• Journal Information: Carbohydrate Polymers, 123:476-481, Journal Name: Carbohydrate Polymers, 123:476-481
• Country of Publication: United States
• Language: English

Related Subjects

Environmental Molecular Sciences Laboratory