Abstract
A correlation of the solubility of cellulose in aqueous alkali solution was established with its so-called “amorphous” content. To achieve this end, cellulose was regenerated under different preparative conditions from its cuprammonium solution and cotton linter was acid-hydrolyzed into a fibrous form and the pulp was physically milled to powder. Cellulose having a relatively large molecular weight was found to completely dissolve in aqueous NaOH solution at 4°C. The solubility of cellulose in a 10 wt% aqueous NaOH at 4°C, Sa could generally be correlated to the relative amount of the high magnetic field envelope of the C4 carbon NMR peak, χh (NMR). χh (NMR) was assigned to the region where intramolecular hydrogen bonds are at least partly broken. The intramolecular hydrogen bond was found to have an important influence on the solubility behavior of cellulose.
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Kamida, K., Okajima, K., Matsui, T. et al. Study on the Solubility of Cellulose in Aqueous Alkali Solution by Deuteration IR and 13C NMR. Polym J 16, 857–866 (1984). https://doi.org/10.1295/polymj.16.857
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DOI: https://doi.org/10.1295/polymj.16.857
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