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Proceedings Paper

Simple XRD algorithm for direct determination of cotton crystallinity
Author(s): Yongliang Liu; Devron Thibodeaux; Gary Gamble; Philip Bauer; Don VanDerveer
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Paper Abstract

Traditionally, XRD had been used to study the crystalline structure of cotton celluloses. Despite considerable efforts in developing the curve-fitting protocol to evaluate the crystallinity index (CI), in its present state, XRD measurement can only provide a qualitative or semi-quantitative assessment of the amounts of crystalline and amorphous cellulosic components in a sample. The greatest barrier to establish quantitative XRD is the lack of appropriate cellulose standards needed to calibrate the measurements. In practical, samples with known CIs are very difficult to be prepared or determined. As an approach, we might assign the samples with reported CIs from FT-IR procedure, in which the threeband ratios were first calculated and then were converted into CIs within a large and diversified pool of cotton fibers. This study reports the development of simple XRD algorithm, over time-consuming and subjective curve-fitting process, for direct determination of cotton cellulose CI by correlating XRD with the FT-IR CI references.

Paper Details

Date Published: 18 May 2012
PDF: 7 pages
Proc. SPIE 8374, Next-Generation Spectroscopic Technologies V, 83740A (18 May 2012); doi: 10.1117/12.918628
Show Author Affiliations
Yongliang Liu, USDA Agricultural Research Service (United States)
Devron Thibodeaux, Consultant (United States)
Gary Gamble, USDA Agricultural Research Service (United States)
Philip Bauer, USDA Agricultural Research Service (United States)
Don VanDerveer, Clemson Univ. (United States)

Published in SPIE Proceedings Vol. 8374:
Next-Generation Spectroscopic Technologies V
Mark A. Druy; Richard A. Crocombe, Editor(s)

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