Fabrication of cellulose aerogel from wheat straw with strong absorptive capacity

Abstract

An effectively mild solvent solution containing NaOH/PEG was employed to dissolve the cellulose extracted from the wheat straw. With further combined regeneration process and freeze-drying, the cellulose aerogel was successfully obtained. Scanning electron microscope, X-ray diffraction technique, Fourier transform infrared spectroscopy, and Brunauer-Emmett-Teller were used to characterize this cellulose aerogel of low density (about 40 mg·cm^-3) and three-dimensional network with large specific surface area (about 101 m²·g^-1). Additionally, with a hydrophobic modification by trimethylchlorosilane, the cellulose aerogel showed a strong absorptive capacity for oil and dye solutions.

Keywords

cellulose aerogel / absorptive capacity / waste wheat straw / freeze-drying

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Acknowledgments

This work was funded by the National Key Basic Research and Development Program of China (2010CB945404, 2011CBA01001 and 2009CB941003), the Chinese Universities Scientific Fund (2012RC014), and the National Thousand Talents Program of China. There are no conflicts of interest or financial conflicts to disclose.

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