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Comparison of Responses of 13C NMR and NIR Diffuse Reflectance Spectroscopies to Changes in Particle Size and Order in Cellulose

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High-resolution solid-state 13C NMR and NIR diffuse reflectance spectra were obtained on microcrystalline and "noncrystalline" celluloses. Particle sizes and relative crystallinity were confirmed by scanning electron microscopy and MIR transmission spectroscopy, respectively. The results showed that NMR is more sensitive to order changes and less sensitive to particle size. NIR reflectance, on the other hand, is very sensitive to particle size changes and essentially insensitive to differences in order.

Keywords: CP/MAS 13C NMR; Cellulose order; FT-IR; NIR; SEM

Document Type: Research Article


Affiliations: Plant Structure and Composition Research Unit, Richard B. Russell Agricultural Research Center, Agricultural Research Service, U.S. Department of Agriculture, Athens, Georgia 30613

Publication date: September 1, 1986

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