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Palchikova EE, Makarov IS, Mironova MV, Vinogradov MI, Golova LK, Kulichikhin VG. Phase Transformations in a PAN–N-Methylmorpholine-N-Oxide–Water System. COLLOID JOURNAL 2022. [DOI: 10.1134/s1061933x22700120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Abstract
The production of long flax fiber for the subsequent production of textile yarn is accompanied by the formation of a significant amount of waste—noils, which is a mechanical mixture of long and short flax fibers and shives. Comparative studies of the structure and chemical composition of the fibrous fraction of noils and shives were carried out using IR spectroscopy. The solubility of shives and flax noils in N-methylmorpholine-N-oxide (NMMO) was studied, a comparative analysis of the rheological behavior of solutions of flax and wood cellulose was carried out and the optimal temperature–concentration conditions for obtaining flax fibers from noils were determined. It was shown for the first time that using the method of solid-phase activation of the cellulose-solvent system makes it possible to obtain fibers in a short period of time (no more than 10 min). The structure of both the raw material and the resulting fibers was studied by X-ray diffraction analysis. The thermal properties of a new type of cellulose fibers was evaluated. The complex of the conducted studies allows us to consider flax fibers from noils along with flax fibers from long-staple flax, as a real alternative to fibers from wood pulp.
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Makarov IS, Golova LK, Bondarenko GN, Anokhina TS, Dmitrieva ES, Levin IS, Makhatova VE, Galimova NZ, Shambilova GK. Structure, Morphology, and Permeability of Cellulose Films. MEMBRANES 2022; 12:membranes12030297. [PMID: 35323772 PMCID: PMC8950333 DOI: 10.3390/membranes12030297] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 02/28/2022] [Accepted: 03/02/2022] [Indexed: 11/16/2022]
Abstract
The work is focused on the study of the influence of the cellulose type and processing parameters on the structure, morphology, and permeability of cellulose films. The free volume of the cellulose films was evaluated by the sorption of n-decane, which is a non-solvent for cellulose. The structural features of the membranes and their morphology were studied using X-ray diffraction, IR spectroscopy, SEM, and AFM methods. The characteristic features of the porous structure and properties of cellulose films regenerated from cellulose solutions in the N-methylmorpholine-N-oxide (NMMO) and cellophane films were compared. Generally, cellulose films obtained from solutions in NMMO have a higher permeability and a lower rejection (as measured using Orange II dye) as compared to cellophane films. It was also found that the cellulose films have a higher ultimate strength and modulus, whereas the cellophane films are characterized by higher elongation at break.
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Affiliation(s)
- Igor S. Makarov
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 29 Leninsky Prosp., 119991 Moscow, Russia; (L.K.G.); (G.N.B.); (T.S.A.); (E.S.D.); (I.S.L.)
- Correspondence:
| | - Lyudmila K. Golova
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 29 Leninsky Prosp., 119991 Moscow, Russia; (L.K.G.); (G.N.B.); (T.S.A.); (E.S.D.); (I.S.L.)
| | - Galina N. Bondarenko
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 29 Leninsky Prosp., 119991 Moscow, Russia; (L.K.G.); (G.N.B.); (T.S.A.); (E.S.D.); (I.S.L.)
| | - Tatyana S. Anokhina
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 29 Leninsky Prosp., 119991 Moscow, Russia; (L.K.G.); (G.N.B.); (T.S.A.); (E.S.D.); (I.S.L.)
| | - Evgenia S. Dmitrieva
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 29 Leninsky Prosp., 119991 Moscow, Russia; (L.K.G.); (G.N.B.); (T.S.A.); (E.S.D.); (I.S.L.)
| | - Ivan S. Levin
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 29 Leninsky Prosp., 119991 Moscow, Russia; (L.K.G.); (G.N.B.); (T.S.A.); (E.S.D.); (I.S.L.)
| | - Valentina E. Makhatova
- Department of Chemistry and Chemical Technology, Kh. Dosmukhamedov Atyrau University, Atyrau 060011, Kazakhstan; (V.E.M.); (N.Z.G.); (G.K.S.)
| | - Nazym Zh. Galimova
- Department of Chemistry and Chemical Technology, Kh. Dosmukhamedov Atyrau University, Atyrau 060011, Kazakhstan; (V.E.M.); (N.Z.G.); (G.K.S.)
| | - Gulbarshin K. Shambilova
- Department of Chemistry and Chemical Technology, Kh. Dosmukhamedov Atyrau University, Atyrau 060011, Kazakhstan; (V.E.M.); (N.Z.G.); (G.K.S.)
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