Abstract
The aim of this study is to isolate cellulose from rice straw, synthesize microcrystalline cellulose and cellulose aerogel, and investigate their structural properties. Infrared (IR) spectroscopy and X-ray diffraction methods were employed for analysis. The IR spectra confirmed the preservation of characteristic functional groups of cellulose in all samples. The degree of crystallinity was calculated using the Segal method and was found to be 0.84 for rice cellulose, 1.048 for microcrystalline cellulose, and 1.714 for the aerogel. The results indicate an increase in crystallinity during cellulose processing, reflecting enhanced structural ordering of the material. These findings demonstrate the potential of rice straw as a promising raw material for producing advanced cellulose-based materials and support their application in paper production and composite material industries.
References
Primkulov M.T., Umarova V.K., Xamdamova D.Sh., Mirobitov M.I. Sholi poyasidan sellyuloza, mikrokristall sellyuloza va sellyulozali aerogel olish hamda ularning xossalarini o‘rganish. Farg‘ona politexnika instituti ilmiy-texnika jurnali. Toshkent, 2025, 29-jild, №1.
Segal L., Creely J.J., Martin A.E., Conrad C.M. Empirical method for estimating the degree of crystallinity of native cellulose using X-ray diffractometry. Textile Research Journal. 1959, Vol. 29, No. 10, pp. 786–794.
Zhbankov R.G. Infrared spectra and structure of carbohydrates. Minsk, 1972, 456 p.
Eshimbetov A.G. Infraqizil (IQ) spektroskopiya usulidan amaliy qo‘llanma. O‘zFA, “Tadqiqotlarning fizik uslublari laboratoriyasi”, Toshkent, 2014.
Nelson M.L., O’Connor R.T. Relation of certain infrared bands to cellulose crystallinity and crystal lattice type. Journal of Applied Polymer Science. 1964, Vol. 8, pp. 1311–1324.
Xamdamova D.Sh., Umarova V.K., Primkulov M.T. Mikrokristall sellyuloza texnologiyasi. “Tafakkur tomchilari”, Toshkent, 2020, 208 b.
Xamdamova D., Umarova V., Primkulov M., Khusenov A. Study on microcrystalline cellulose from medicinal plants. E3S Web of Conferences. 2023, Vol. 434, 03038. https://doi.org/10.1051/e3sconf/202343403038
Xamdamova D.Sh., Umarova V.K., Primkulov M.T. Obtaining microcrystalline cellulose from medicinal plants (Amaranthus and Silybum marianum). Universum: Chemistry and Biology. Moscow, 2022, No. 6 (96), Part 3, pp. 43–49.
Xamdamova D.Sh., Umarova V.K., Tadjieva A.J., Primkulov M.T. MKC asosida tabletka ishlab chiqarish texnologiyasi. Scholar Scientific Journal. 2023, August, pp. 44–51.

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