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Streaming potential measurements were conducted on lyocell and viscose fibers, to determine the relative order in sorption extents of salt cations and anions. The sorption of K+ was greater than Na+ ions, and the sorption extents of the anions, Cl− and Br−, were similar. Previously, we had examined accessibility of the same ions in the fibers, and found them to follow the order: K+ < Na+ and Cl...
Sugarcane bagasse was selected as residual feedstock to investigate the effects of an acid/peroxide-alkali (APA) combined pretreatment on the extraction of cellulose and on its applicability for producing cellulose acetate. The pretreatment was effective in disrupting the recalcitrant lignocellulose structure and isolating cellulose (SBC), which reached 85.67% purity. High performance liquid chromatography,...
Dynamic vapor sorption (DVS) coupled with deuterium exchange was applied in determining the amount of hydroxyl (OH) groups accessible for deuteration in pulps and pure cellulose quantitatively. The samples studied with the method were different types of chemical pulps as well as microcrystalline and amorphous cellulose powders. The measurement sequence consisted of drying the samples first until the...
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