Low-Alpha-Cellulose-Based Membranes
Makarov I. Shambilova G. Bukanova A. Kairliyeva F. Bukanova S. Kadasheva Z. Gainutdinov R. Koksharov A. Komarov I. Song J. Legkov S. Nebesskaya A.
March 2025Multidisciplinary Digital Publishing Institute (MDPI)
Polymers
2025#17Issue 5
Depending on the method of cellulose production, the proportion of alpha fraction in it can vary significantly. Paper pulp, unlike dissolving cellulose, has an alpha proportion of less than 90%. The presence of cellulose satellites in the system does not impede the formation of concentrated solutions of N-methylmorpholine-N-oxide (NMMO). In the current study, spinning solutions based on cellulose with a low alpha fraction (up to 90%) (pulp cellulose) are investigated. The morphological features and rheological behavior of such solutions are examined. It is suggested to roll the obtained solutions in order to obtain cellulose membranes. X-ray diffraction, IR spectroscopy, AFM and SEM were used to investigate the resulting structure and morphology of the obtained membranes. It is shown that the degree of crystallinity for the membranes varies based on the impurity content in the sample. The morphology of the films is characterized by a dense texture and the absence of vacuoles. The highest strength and elastic modulus were found for membranes made of bleached hardwood sulfate cellulose, 5.7 MPa and 6.4 GPa, respectively. The maximum values of the contact angle (48°) were found for films with a higher proportion of lignin. The presence of lignin in the membranes leads to an increase in rejection for the anionic dyes Orange II and Remazol Brilliant Blue R.
alpha fraction , biodegradability , cellulose , cellulosic membranes , hemicellulose , morphology , N-methylmorpholine-N-oxide , permeability , transport properties
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A.V. Topchiev Institute of Petrochemical Synthesis RAS, Leninsky Prospect 29, Moscow, 119991, Russian Federation
Department of Chemistry and Chemical Technology, Kh. Dosmukhamedov Atyrau University, Studenchesky Ave. 1, Atyrau, 060011, Kazakhstan
Institute of Petrochemical Engineering and Ecology Named After N.K. Nadirov, Atyrau Oil and Gas University Named After S. Utebayev, M. Baimukhanov Street 45A, Atyrau, 060027, Kazakhstan
Kurchatov Complex of Crystallography and Photonics, National Research Center “Kurchatov Institute”, Leninsky Prospect 59, Moscow, 119333, Russian Federation
Ilim Group, 42 Ul, Koryazhma Dybtsyna, 165651, Russian Federation
Department of Scientific Activity, Moscow Polytechnic University, St. B. Semenovskaya, 38, Moscow, 107023, Russian Federation
Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources and International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing, 210037, China
A.V. Topchiev Institute of Petrochemical Synthesis RAS
Department of Chemistry and Chemical Technology
Institute of Petrochemical Engineering and Ecology Named After N.K. Nadirov
Kurchatov Complex of Crystallography and Photonics
Ilim Group
Department of Scientific Activity
Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources and International Innovation Center for Forest Chemicals and Materials
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