Simple XRD algorithm for direct determination of cotton crystallinity

Yongliang Liu; Devron Thibodeaux; Gary Gamble; Philip Bauer; Don VanDerveer

doi:10.1117/12.918628

17 May 2012 Simple XRD algorithm for direct determination of cotton crystallinity

Yongliang Liu, Devron Thibodeaux, Gary Gamble, Philip Bauer, Don VanDerveer

Proceedings Volume 8374, Next-Generation Spectroscopic Technologies V; 83740A (2012) https://doi.org/10.1117/12.918628
Event: SPIE Defense, Security, and Sensing, 2012, Baltimore, Maryland, United States

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.

Citation Download Citation

Yongliang Liu, Devron Thibodeaux, Gary Gamble, Philip Bauer, and Don VanDerveer "Simple XRD algorithm for direct determination of cotton crystallinity", Proc. SPIE 8374, Next-Generation Spectroscopic Technologies V, 83740A (17 May 2012); https://doi.org/10.1117/12.918628

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