CHEMICAL TRANSFORMATION OF TECHNICAL FIBER OF FLAX, HEMP AND JUTE TO CELLULOSE AND THEIR PYROLYSIS

Taking into account the chemical composition and morphological features the tech-nical high purity fibers of flax, hemp and jute were studied as a new potential source of cellu-lose. The kinetics of the oxidation-hydrolytic method was shown for producing pulp from technical jute fibers in an aqueous alkaline medium containing the active components. The degree of removal of non-cellulosic components from technical jute fibers increases with the concentration of sodium hydroxide in an aqueous medium containing active additives, as well as with the increase in processing time and temperature. With the methods of chemical analysis, wide-angle X-ray scattering, FT-IR spectroscopy, electron microscopy the chemical composition and the supramolecular structure of the samples was studied. The thermal stabil-ity of the technical fibers, flax pulp, jute and hemp were determined. It was found that the ob-tained samples of linen, hemp and jute cellulose have I monoclinic modification. The crys-tallinity of the test samples according to X-ray diffraction method and calculated by limiting adsorption of water was the same within the error. This demonstrates the correctness of using the adsorption method for assessing the degree of crystallinity of cellulose. The obtained cel-lulose flax, hemp and jute were thermally stable up to 324-337 ° C.

Key words: cellulose, flax, hemp, jute, structure, thermal stability, physical and chemical properties

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2016, Т. 59, № 6, Стр. 97‒104

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