Development of membranes based on cellulose isolated from miscanthus biomass by oxidative delignification
X. S. CHEREPANOVA, I. A. CHERENKOV, A. A. PEREBEINOS, T. B. MEDVEDEVA, N. V. GROMOV, V. N. PARMON
Novosibirsk State Technical University, Novosibirsk, Russia
Keywords: miscanthus, cellulose, oxidative delignification, acetic acid, hydrogen peroxide, separator, membrane, electrochemical energy storage devices
Abstract
The oxidative delignification of miscanthus was optimised regarding the parameters of catalyst used and the amount of acetic acid for cellulose extraction, and the effect of preliminary mechanical activation on the process efficiency was also studied. It has been shown that an increase in CH3COOH content and the use of a ZrO2•nH2O catalyst improve the purity and yield of the cellulose product. Mechanical activation of miscanthus for 10 min reduces both the amount of residual lignin in the cellulose and its polymerisation degree. The membranes produced in this study match the thickness of separators used in energy storage devices. The uptake of electrolyte (6 mol/L KOH) observed in the sample obtained from an N,N-dimethylacetamide solution exceeds that of a separator produced by a similar method from microcrystalline cellulose.
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