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Роговина, С. З.; Голова, Л. К.; Borodina, O. E.; Вихорева, Г. А.

doi:10.1023/a:1015547105887

Cited by 3 publications

(2 citation statements)

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“…The unique system of inter- and intramolecular hydrogen bonds in cellulose is responsible for its chemical characteristics such as high resistance to a number of traditional solvents, packing density, and structure [ 24 , 25 , 26 ]. As a polysaccharide, cellulose is characterized by excellent hydrophilicity, biocompatibility, biodegradability, and high mechanical properties [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Manufacturing of Functional Paper with Modified by N-Methylmorpholine-N-oxide Surfaces

et al. 2023

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The manufacturing of paper with new functional properties is a current problem today. A method of modifying the surface layer of paper by the partial dissolution of cellulose on its surface is proposed. N-Methylmorpholine-N-oxide (NMMO) is proposed for use as a solvent, the regeneration of which provides an environmentally friendly process. It was shown that among the possible hydrate forms of the solvent, the monohydrate and higher-melting forms are optimal for modifying the paper surface. The temperature–time modes of processing were revealed and the weight gain and density increase in the course of modification were estimated. The structural and morphological features of the original and modified paper were studied by X-ray imaging and scanning microscopy. The NMMO surface treatment makes it possible to vary the air permeability of the paper, making it practically non-permeable. The capillary and pore system were radically transformed after the partial dissolution of cellulose and its coagulation, as the formed cellulose film isolates them, which leads to a decrease in surface absorbency. The processing conditions allowing for the optimization of the optical and strength properties of the modified paper samples are revealed. The resulting paper with a modified N-methylmorpholine-N-oxide surface layer can be used for printing valuable documents.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on the Manufacturing of Functional Paper with Modified by N-Methylmorpholine-N-oxide Surfaces

et al. 2023

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“…up to 0.4 [9,10] can be obtained from solid mixtures of the reagents by the action of pressure and shear stress on them. Based on these investigations, several Russian Federation (RF) patents have been acquired.…”

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confidence: 99%

Amphiphilic systems based on polysaccharides produced by solid-phase synthesis − A review

2012

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The results of research on polymer blends based on polysaccharides (chitin, chitosan, cellulose, starch, etc.) and variously hydrophilic synthetic polymers produced by reaction mixing in solid state under pressure and shear stresses are summarized. The mechanisms of the processes occurring under solidphase synthesis conditions, the properties of the multicomponent systems formed, and the feasibility of their application for creating new biocompatible and biodegradable materials are discussed.In this review, we have summarized the results of more than 20 years of collaboration with the Department of Chemical Fibres and Nanomaterials Engineering, A. N. Kosygin Moscow State Textile University (MGTU im. A. N. Kosygina), chaired by Leonid Semenovich Gal'braikh, on the study of the structure, properties, and application of materials based on polysaccharides produced by solid-phase synthesis at N. S. Enikolopov Institute of Synthetic Polymeric Materials (ISPM im. Enikolopova). These results have helped produce a number of amphiphilic composites capable of forming film and fibre from neutral aqueous and organic solutions that have potential for use in filtration and ion exchange processes, in biotechnology, and for producing new biomedical materials.It is well known that polysaccharides are nontoxic biopolymers, which have a wide raw materials base and are widely used as inexpensive fillers in production of biodegradable plastic materials (starch, cellulose, etc.) as well as for creating new biomedical materials having special properties (chitin, chitosan, etc.) [1-3]. However, poor solubility of polysaccharides, lack of possibility for their treatment in melt, and low compatibility between synthetic and natural polymers restrict methods of producing composites based on them. The system developed at ISPM for submitting polymers to pressure, shear stress, and temperature in such devices as extruders helps achieve significant synthesis effects (high degree of conversions, process selectivity, reduced mechanical and thermal destruction, etc.) and develop industrial solutionless methods of modification of infusible and difficultly soluble polymers.In one of the earliest joint papers [4], we showed the feasibility and advantage of use of solid-phase chitosan and chitin synthesis method because this method helps enhance the efficiency and ecological cleanness of the process. It was observed that alkali-deacetylation of chitin occurs completely under these conditions (the content of residual acetamide groups in the product does not exceed 5-8%). The quantity of alkali used in this method is 2-4 times less than in the chitosan production methods described in the literature, and the process time is reduced from several hours to minutes. We suggest that the basic reason for increased efficiency of the process is formation of solid amorphous chitin−alkali solutions in the course of their joint straining. Investigations of the particle size composition, molecular mass distribution, and rheological behavior of the chitosan specimen...

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Polysaccharide-based polymer blends: Methods of their production

Роговина

Вихорева

2006

Glycoconj J

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The existing methods of preparing polymer blends of cellulose, chitin and chitosan with natural and synthetic polymers and their applications are reviewed. The methods of solid-phase blending of these polymers under conditions of joint action of high pressure and shear deformation are discussed. Normally, under these conditions the processes of dispersion of polymer particles, amorphization, mixing at different levels, depolymerization as well as a chemical interaction resulting in formation of branched and crosslinked structures can take place. The probability and intensity of these processes depend in many respects on the type and magnitude of the external force, but the properties of the polymers are of higher importance. The advantages of the method of joint action of high pressure and shear deformation compared to the conventional techniques of polysaccharides mixtures production are shown.

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Cited by 3 publications

References 2 publications

Experimental Study on the Manufacturing of Functional Paper with Modified by N-Methylmorpholine-N-oxide Surfaces

Experimental Study on the Manufacturing of Functional Paper with Modified by N-Methylmorpholine-N-oxide Surfaces

Amphiphilic systems based on polysaccharides produced by solid-phase synthesis − A review

Polysaccharide-based polymer blends: Methods of their production

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