Grafting of model primary amine compounds to cellulose nanowhiskers through periodate oxidationAuthor(s): Rajalaxmi Dash; Thomas Elder; Arthur Ragauskas
Source: Cellulose Journal 19(6): 2069-2079
Publication Series: Scientific Journal (JRNL)
Station: Southern Research Station
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DescriptionThis study demonstrates regioselective oxidation of cellulose nanowhiskers using 2.80–10.02 mmols of sodium periodate per 5 g of whiskers followed by grafting with methyl and butyl amines through a Schiff base reaction to obtain their amine derivatives in 80–90 % yield. We found a corresponding increase in carbonyl content (0.06–0.14 mmols/g) of the dialdehyde cellulose nanowhiskerswith the increase in oxidant as measured by titrimetric analysis and this was further evidenced by FT-IR spectroscopy. Grafting of amine compounds to the oxidized cellulose nanowhiskers resulted in their amine derivatives, which are found to be partially soluble in DMSO.Therefore, the reduction reaction between amines and carbonyl groups was confirmed through 13C NMR spectra, which was also supported by copper titration, XPS, and FT-IR spectroscopy. Morphological integrity and crystallinity of the nanowhiskerswas maintained after the chemical modification as studied by AFM and solidstate 13C NMR, respectively.
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CitationDash, R., Elder, T. and Ragauskas, A.J. 2012. Grafting of model primary amine compounds to cellulose nanowhiskers through periodate oxidation, Cellulose 19(6): 2069-2079.
KeywordsAmine derivative, Cellulose nanowhiskers, Dialdehyde cellulose nanowhiskers, Periodate oxidation
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