Smykovskaya Regina Sergeevna

Scopus Publications

Effect of AgNPs on PLA-Based Biocomposites with Polysaccharides: Biodegradability, Antibacterial Activity and Features
Kristine V. Aleksanyan, Elena E. Mastalygina, Regina S. Smykovskaya, Nadezhda A. Samoilova, Viktor A. Novikov, Aleksander M. Shakhov, Yana V. Ryzhmanova, Galina A. Kochkina, Natalya E. Ivanushkina
International Journal of Molecular Sciences, 2025
According to existing ecological problems, one of the promising developments is the creation of polyfunctional materials, which can be biodegradable, along with possessing antibacterial activity. The present research proposes biocomposites based on PLA with silver nanoparticles (AgNPs) and natural polysaccharides obtained in a twin-screw extruder. Introduction of polysaccharides to PLA-based biocomposites with/without AgNPs led to significant decrease in the elastic modulus and tensile strength, while the elongation at break remained almost unchanged. Thanks to the presence of natural polysaccharides, there was intensified biodegradation in soil despite the AgNP availability. The maximal mass loss was 29% for the PLA–PEG1000–starch + AgNPs (80:10:10 + 0.5 wt%) biocomposite. Analyses of the systems before and after soil exposure were carried out using DSC and FTIR spectroscopy methods. According to a thermal analysis, it was found that PLA crystalline regions degrade during exposure to soil. The same feature was detected during the spectral analysis. The intensity of the characteristic absorption bands of PLA decreased. Furthermore, it was found that the dark areas on the surface of the materials are of a polysaccharide nature and may be signs of biofouling of the materials by microbial flora. The tests on fungus resistance showed that biocidal additives such as AgNPs in PLA-based biocomposites with polysaccharides did not inhibit the development of mycelial fungi–biodestructors. And the increased amount of chitosan in the films contributed to their more active destruction by the end of the observation period. It was demonstrated that such biocomposites can inhibit bacterial growth.
Nanotechnological advancement in green hydrogen production from organic waste: Recent developments, techno–economic, and life cycle analyses
Chandra Tejaswi Padigala, Gour Gopal Satpati, Mamata Singhvi, Lalit Goswami, Anamika Kushwaha, Sheetal Oraon, Kristine Aleksanyan, Regina S. Smykovskaya, Hemamalini Rawindran, Lim Jun Wei, Rajiv Rajak, Soumya Pandit, Pritam Kumar Dikshit
International Journal of Hydrogen Energy, 2024
Development of Poly(lactic acid)-Based Biocomposites with Silver Nanoparticles and Investigation of Their Characteristics
Kristine V. Aleksanyan, Regina S. Smykovskaya, Nadezhda A. Samoilova, Viktor A. Novikov, Aleksander M. Shakhov, Arseny V. Aybush, Olga P. Kuznetsova, Sergey M. Lomakin, Yana V. Ryzhmanova
Polymers, 2024
Nowadays, the demand for food packaging that maintains the safety and quality of products has become one of the leading challenges. It can be solved by developing functional materials based on biodegradable polymers, such as poly(lactic acid) (PLA). In order to develop PLA-based functional materials with antibacterial activity, silver nanoparticles (AgNPs) were introduced. In the present study, AgNPs stabilized by a copolymer of ethylene and maleic acid were used. Under the joint action of shear deformations and high temperature, the biocomposites of PLA with poly(ethylene glycol) and AgNPs were produced. Their mechanical and thermal characteristics, water absorption, and structure were investigated using modern methods (DSC, FTIR, Raman spectroscopy, SEM). The effect of AgNP concentration on the characteristics of PLA-based biocomposites was detected. Based on the results of antibacterial activity tests (against Gram-positive and Gram-negative bacteria, along with yeast) it is assumed that these systems have potential as materials for extending the storage of food products. At the same time, PLA–PEG biocomposites with AgNPs possess biodegradability.
Preparation and Study of the Properties of Biodegradable Keratin-Containing Compositions
R. S. Smykovskaya, O. P. Kuznetsova, T. I. Medintseva, A. V. Kireynov, V. G. Volik, E. V. Prut, A. A. Berlin
Polymer Science Series D, 2022
Keratin-containing biocomposites of different dispersity were obtained based on polyethylene and polylactide. The dependence of the properties of compositions on the nature of the polymer matrix and the content of keratin was found. The X-ray microtomography has shown that the exposure of composites in soil leads to an increase in the porosity of materials. The capacity of the obtained materials for biodegradation was determined.
Mechanical and Rheological Properties of Biocomposites Based on Polyethylene and Keratin
R. S. Smykovskaya, O. P. Kuznetsova, T. I. Medintseva, V. G. Volik, E. V. Prut, A. A. Berlin
Russian Journal of Physical Chemistry B, 2022
The mechanical and rheological properties of biocomposites based on polyethylene (PE) and keratin obtained by high-temperature shear deformation using an extruder-dispersant and by mechanical mixing in a Brabender plastograph are investigated. It is established that the method of high-temperature shear deformations makes it possible to obtain stronger materials. The biodegradation process of PE–keratin mixtures with different contents and dispersions of the filler is studied. It is found that the most intensive biodegradation process occurs in compositions obtained using an extruder-dispersant.
Sctructure and Properties of Biocomposities Based on Keratin and Thermoplastic Polymers
R. S. Smykovskaya, O. P. Kuznetsova, V. G. Volik, E. V. Prut
Russian Journal of Physical Chemistry B, 2020
New composites based on keratin and EVA (the copolymer of ethylene and vinyl acetate) are developed. Their mechanical and rheological properties and their process of biodegradation are investigated. These materials’ characteristics were with composites based on polyethylene and keratin to study interfacial interactions. Differences in their mechanical properties are revealed. It is shown that biodegradation proceeds better in composites using EVA because it has reactive groups, in contrast to polyethylene.
New polymer composites based on keratin and polyethylene
E. V. Prut, R. S. Smykovskaya, O. P. Kuznetsova, Yu. I. Deryabina, V. G. Volik, A. A. Berlin
Doklady Physical Chemistry, 2017
New biodegradable composites based on keratin and polyethylene have been produced under shear deformation. It has been demonstrated that the introduction of keratin leads to an increase in elastic modulus and to a decrease in ultimate tensile strength and elongation at break of the compositions. Elongation at break εb depends on the keratin dispersity; the highest εb values are observed for the compositions containing the smallest keratin particles. It has been shown that the compositions are susceptible to mold fungi; i.e., they are biodegradable.