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Yudanova, T. N.; Skokova, I. F.; Bochkareva, O. N.; Гальбрайх, Л. С.

doi:10.1023/a:1012994631958

Fibre Chemistry

2001

DOI: 10.1023/a:1012994631958

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T. N. Yudanova

I. F. Skokova

O. N. Bochkareva

et al.

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Cited by 4 publications

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“…Varying the system composition presents huge possibilities for targeted arrangement of the supramolecular structure of a polymer matrix containing drugs (e.g., an enzyme and/or antiseptic), which determines the biological activity. Thus, the binding strength of the polymer composite layer and the stability of the enzymes could be regulated by additional cross-linking using bifunctional reagents or the incorporation into the structure of fibers with high specific inner surface area during the development of materials with combined biological activity by deposition of the layer on the fibrous matrix [13][14][15]. The protein particles should be located on the outer layers in order to increase the availability of the enzyme and, therefore, its activity.…”

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Modified polymeric materials, some fundamental and applied aspects

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Results of theoretical and applied studies on the modification of fibrous and film materials that were performed in the Department of Chemical Fiber and Nanomaterial Technology during recent years were presented.Controlled regulation of the properties of complex polymeric systems using various methods to modify them during the synthesis of the fiber-forming polymers and the production of shaped composites and to change the functional composition and structure of the formed fibers and materials based on them occupied an important place in the wide ranging scientific interests of Kirill Evgen'evich Pererpelkin that encompassed problems of the theory and technology of chemical fiber formation processes and the structures and properties of composites. The present article reviews results of research in this area that was carried out in the Department of Chemical Fibers and Nanomaterials of A. N. Kosygin Moscow State Textile University and is dedicated to the memory and honor of K. E. Perepelkin, our colleague and friend.Many effective methods for making controlled changes in the structures and properties of polymers are based on their chemical modification. Studying trends in chemical reactions and the influence of subtle structural features of macromolecules and the supramolecular structure on the physical and physicochemical properties of polymeric systems is one of the most important problems of polymer chemistry. Its solution not only enables the development and deepening of fundamental knowledge but also acts as a basis for elaborating methods and technical processes for producing new high-efficiency polymers.Graft polymerization of ionizable and non-ionizable monomers containing reactive functional groups and their subsequent chemical transformations occupy a special place in the study of polymeric systems. These types of reactions can produce modified fibers with a broad spectrum of properties and good retention of the physicomechanical properties owing to the high strength of the industrial samples, i.e., fiber precursors, and the high technology of the process.Special attention in the evolution of this area was paid to the development of effective redox systems (RSs) that provide a high degree of conversion and efficiency of graft polymerization. A series of RSs that could carry out graft polymerization of ionizable monomers with 70-90% conversion and grafting efficiency 90-95% and of non-ionizable ones, up to 98 and 100%, respectively, was proposed [1]. The addition of small quantities of nano-sized RS components, i.e., redox-active metal ions, could accelerate substantially the formation of the macroradicals.Several process features were identified during a study of graft polymerization to polymers oriented at the interface of solid and liquid phases. The structural and physical properties (orientation and degree of crystallinity) and the dynamics of the polymer molecule as a solid body were observed to have an influence on the kinetics of radical graft polymerization. Concepts about the role of the gel eff...

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Modified polymeric materials, some fundamental and applied aspects

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“…The possibility of using polyhexamethyleneguanidine (PHMG) for the one-stage method of fabricating materials with biologically active or combined properties has been demonstrated in many publications [8][9][10]. The antimicrobial polymer was fixed in the matrix by crosslinking with glutaraldehyde with formation of covalent bonds, which allowed obtaining materials resistant to wet treatments in different conditions.…”

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Study of the possibility of obtaining viscose fibre with biologically active properties by a continuous method

2007

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The effect of the composition of the polymer composite (type of polyhexamethyleneguanidine (PHMG) salt, content of components) on the structure of the composite formed and level of desorption of the biologically active substance (BAS) was established as a result of studying the kinetics of desorption of BAS from viscose fibres containing PHMG salt and polyalkylene oxide. The possibility of obtaining viscose fibres containing a biologically active substance of the polymer type with a continuous process scheme was demonstrated.Developments aimed at giving fibre materials biological properties have now been extremely intensified, and this concerns not only medical materials but also so-called hygienic textiles. However, the prolonged use of such items for daily wear can have negative consequences, since the low selectivity of the antimicrobials kills all microflora on the skin, which, despite expectations, not only does not reduce the probability of disease, but also negatively affects the immune reactivity of the human body. At the same time, the necessity of developing process methods for manufacturing new types of biologically active fibre materials is obvious due to the demand for them in different sectors (medical articles, filters, etc.).Fibre materials with biological activity resistant to laundering are usually manufactured by chemical addition of the active component to the fibre matrix, conducting the process in one or two stages. In the first case, simultaneous treatment with the biologically active substance (BAS) and modifying reagent is conducted, while in the second case, the matrix is modified first, and then the BAS is added [1]. The drawbacks of both methods include incorporation of the modifier in the matrix, which increases the toxicity of the material in some cases, and can also change the physicomechanical properties of the fibre material, which can be reflected in its consumer properties (feel, color).Methods based on including BAS in the structure of the fibre during spinning or subsequent finishing have been examined in recent years as a promising method of obtaining large-tonnage chemical fibres with biologically active properties [2]. To incorporate the biologically active substance in the spinning solution, it must satisfy a number of requirements related to the spinning conditions, and this limits the list of BAS that can be used [2]. For this reason, the second method is preferred.Of the antimicrobials that can be used to give fibres special properties, biologically active polymers are of great interest. Use of a biopolymer chitosan to give fibre materials biological stability by impregnation and precipitation [3,4] or by adding to a bifunctional compound [4] is well known. However, the poor solubility of chitosan, high viscosity of the solutions, increased rigidity of the materials, and the narrow spectrum of the bacteriostatic action do not allow considering it an effective BAS. Restricted use (not in sufficient doses) for radiation sterilization the most suitable method for this type...

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Thermal degradation kinetics of antimicrobial agent, poly(hexamethylene guanidine) phosphate

2006

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Cited by 4 publications

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Modified polymeric materials, some fundamental and applied aspects

Modified polymeric materials, some fundamental and applied aspects

Study of the possibility of obtaining viscose fibre with biologically active properties by a continuous method

Thermal degradation kinetics of antimicrobial agent, poly(hexamethylene guanidine) phosphate

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