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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Theoretical and experimental developments for accurate determination of crystallinity of cellulose I materials

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Driemeier, Carlos [1] ; Calligaris, Guilherme A. [1]
Total Authors: 2
[1] Lab Nacl Ciencia & Tecnol Bioetanol CTBE, Campinas, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: JOURNAL OF APPLIED CRYSTALLOGRAPHY; v. 44, n. 1, p. 184-192, FEB 2011.
Web of Science Citations: 61

This work defines the crystallinity of cellulose I materials on a dry-weight basis. Theoretical and experimental developments in X-ray diffraction lead to a crystallinity determination method that is estimated to reach 1 Sigma accuracies of better than 0.05 (crystallinity defined between 0 and 1). The method is based on Rietveld modelling, to resolve cellulose I Bragg peaks, and a standard truncated invariant integral. Corrections are derived to account for incoherent scattering, moisture content and other compositional deviations from pure cellulose. The experimental development uses X-ray diffraction in transmission fibre geometry with two-dimensional pattern Rietveld modelling, including a crystal-orientation distribution function. The crystallinities of a few commercial cellulose I materials were determined with the aim of illustrating the applicability of the method. (AU)

FAPESP's process: 10/05523-3 - Nanomorphologic changes of sugarcane lignocellulosic matter
Grantee:Carlos Eduardo Driemeier
Support type: Research Grants - Young Investigators Grants