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Karpova SG, Olkhov AA, Varyan IA, Khan OI, Botin AA, Naletova AV, Popov AA, Iordanskii AL. Electrospun Polylactide-Poly(ε-Caprolactone) Fibers: Structure Characterization and Segmental Dynamic Response. Polymers (Basel) 2024; 16:1307. [PMID: 38794500 PMCID: PMC11125250 DOI: 10.3390/polym16101307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 04/27/2024] [Accepted: 05/02/2024] [Indexed: 05/26/2024] Open
Abstract
Electrospun ultrathin fibers based on binary compositions of polylactide (PLA) and poly(ε-caprolactone) (PCL) with the various content from the polymer ratio from 0/100 to 100/0 have been explored. Combining thermal (DSC) and spectropy (ESR) techniques, the effect of biopolymer content on the characteristics of the crystal structure of PLA and PCL and the rotative diffusion of the stable TEMPO radical in the intercrystallite areas of PLA/PCL compositions was shown. It was revealed that after PLA and PCL blending, significant changes in the degree of crystallinity of PLA, PCL segment mobility, sorption of the Tempo probe, as well as its activation energy of rotation in the intercrystalline areas of PLA/PCL fibers, were evaluated. The characteristic region of biopolymers' composition from 50/50 to 30/70% PLA/PCL blend ratio was found, where the inversion transition of PLA from dispersive medium to dispersive phase where an inversion transition is assumed when the continuous medium of the PLA transforms into a discrete phase. The performed studies made it possible, firstly, to carry out a detailed study of the effect of the system component ratio on the structural and dynamic characteristics of the PLA/PCL film material at the molecular level.
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Affiliation(s)
- Svetlana G. Karpova
- Department of Biological and Chemical Physics of Polymers, Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygina Street, 119334 Moscow, Russia; (S.G.K.); (A.A.O.); (A.A.P.)
| | - Anatoly A. Olkhov
- Department of Biological and Chemical Physics of Polymers, Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygina Street, 119334 Moscow, Russia; (S.G.K.); (A.A.O.); (A.A.P.)
- Academic Department of Innovational Materials and Technologies Chemistry, Plekhanov Russian University of Economics, 36 Stremyanny Lane, 117997 Moscow, Russia
| | - Ivetta A. Varyan
- Department of Biological and Chemical Physics of Polymers, Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygina Street, 119334 Moscow, Russia; (S.G.K.); (A.A.O.); (A.A.P.)
- Academic Department of Innovational Materials and Technologies Chemistry, Plekhanov Russian University of Economics, 36 Stremyanny Lane, 117997 Moscow, Russia
| | - Oksana I. Khan
- Institute of Biochemical Technology and Nanotechnology, RUDN University, 6 Miklukho-Maklaya Street, 117198 Moscow, Russia;
- N. N. Semenov Federal Research Center for Chemical Physics Academy of Science, 119991 Moscow, Russia
| | - Andrey A. Botin
- Department of Organic Chemistry and Petroleum Chemistry, Gubkin University, 65 Leninsky Prospect Building 1, 119991 Moscow, Russia; (A.A.B.); (A.V.N.)
| | - Anna V. Naletova
- Department of Organic Chemistry and Petroleum Chemistry, Gubkin University, 65 Leninsky Prospect Building 1, 119991 Moscow, Russia; (A.A.B.); (A.V.N.)
| | - Anatoly A. Popov
- Department of Biological and Chemical Physics of Polymers, Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygina Street, 119334 Moscow, Russia; (S.G.K.); (A.A.O.); (A.A.P.)
- Academic Department of Innovational Materials and Technologies Chemistry, Plekhanov Russian University of Economics, 36 Stremyanny Lane, 117997 Moscow, Russia
| | - Alexey L. Iordanskii
- N. N. Semenov Federal Research Center for Chemical Physics Academy of Science, 119991 Moscow, Russia
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Polylactide-Meso-Substituted Arylporphyrin Composites: Structure, Properties and Antibacterial Activity. Polymers (Basel) 2023; 15:polym15041027. [PMID: 36850310 PMCID: PMC9965752 DOI: 10.3390/polym15041027] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 02/14/2023] [Accepted: 02/16/2023] [Indexed: 02/22/2023] Open
Abstract
The structural features and antibacterial properties of polymer-porphyrin composites were investigated. Meso-substituted arylporphyrin 0.2-0.5 wt.% was immobilized in a polylactide matrix. The immobilization of porphyrin causes a bathochromic shift and splitting of the Soret band. This study of the morphology of the obtained composites demonstrated a uniform distribution of the meso-substituted arylporphyrin in the polylactide matrix. It was determined by the X-ray diffraction analysis that porphyrin does not affect the α-form of polylactide crystalline formations. However, its addition into the polymer somewhat reduces the melting point (by 1-2 °C) and the degree of crystallinity of polylactide (by 3-4%). The elastic characteristics of the resulting systems were determined by the ultrasonic method, and a decrease in the density of the samples with an increase of the arylporphyrin content was shown. According to the results of the biological test, the dark toxicity of the obtained composites against the microorganisms Staphylococcus aureus, Salmonella Typhimurium and Escherichia coli was shown. Immobilizates containing 0.4 and 0.5 wt.% porphyrin showed the best antibacterial effect. The antibacterial activity of the studied composites makes it possible to attribute the polylactide-porphyrin systems to promising materials in the field of medicine and bioengineering.
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Natural Degradation: Polymer Degradation under Different Conditions. Polymers (Basel) 2022; 14:polym14173595. [PMID: 36080670 PMCID: PMC9459705 DOI: 10.3390/polym14173595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 08/26/2022] [Indexed: 12/03/2022] Open
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