Determination of sulfate esterification levels in cellulose nanocrystals by attenuated total reflectance - Fourier transform infrared spectroscopy

Jin Gu, Jeffrey M. Catchmark, Douglas D. Archibald, Edward Q. Kaiser

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Cellulose nanocrystals were produced by hydrolyzing cotton cellulose with high concentration sulfuric acid. Attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy was used as a simple method to quantify the sulfate esterification levels of cellulose nanocrystals(CNCs) with different post treatments. Understanding the surface chemistry of cellulose is critical for creating realistic model systems for studying lignocellulose assembly. Cellulose nanocrystals prepared by a less efficient hydrochloric acid treatment, which do not have the sulfate content, were used as the zero sulfate standards. Dextran sulfate was added to the zero standards in order to create calibration curves. Our results indicate that both post hydrochloric acid and pyridine treatment after the sulfuric acid hydrolysis process did not remove the sulfate groups on the cellulose nanocrystals effectively, in contract to previously published data. Our data suggests that this method did not work well on cellulose and only cellulose pyridinium salts were obtained. This is under further study.

Original languageEnglish (US)
Title of host publicationAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2010, ASABE 2010
PublisherAmerican Society of Agricultural and Biological Engineers
Pages23-32
Number of pages10
ISBN (Print)9781617388354
StatePublished - Jan 1 2010

Publication series

NameAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2010, ASABE 2010
Volume1

All Science Journal Classification (ASJC) codes

  • Agricultural and Biological Sciences (miscellaneous)

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