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Panchenko VN, Zakharov VA, Matsko MA. Study of the Bis(imino)pyridyl Complex of Fe(II)/Nafen and Titanium-Magnesium/Nafen Catalysts for Synthesis of Polyethylene/Nafen Composites by in situ Ethylene Polymerization. POLYMER SCIENCE SERIES B 2022. [DOI: 10.1134/s1560090422700580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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Sukhanova A, Boyandin A, Ertiletskaya N, Simunin M, Shalygina T, Voronin A, Vasiliev A, Nemtsev I, Volochaev M, Pyatina S. Study of the Effect of Modified Aluminum Oxide Nanofibers on the Properties of PLA-Based Films. MATERIALS (BASEL, SWITZERLAND) 2022; 15:6097. [PMID: 36079483 PMCID: PMC9458046 DOI: 10.3390/ma15176097] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 08/22/2022] [Accepted: 08/26/2022] [Indexed: 06/15/2023]
Abstract
To find out whether Al2O3 nanofiller is effective in improving the characteristics of polymer composites, composite polymer films based on biodegradable polylactide and epoxidized aluminum oxide nanofibers were obtained by solution casting. Surface morphology, mechanical and thermal properties of composites were studied by SEM, IR-Fourier spectroscopy, DSC and DMA. It was shown that, below and above the percolation threshold, the properties of the films differ significantly. The inclusion of alumina nanoparticles up to 0.2% leads to a plasticizing effect, a decrease in the crystallization temperature and the melting enthalpy and an increase in the tensile stress. An increase in the content of alumina nanoparticles in films above the percolation threshold (0.5%) leads to a decrease in the crystallinity of the films, an increase in stiffness and a drop in elasticity. Finding the percolation threshold of alumina nanoparticles in PLA films makes it possible to control their properties and create materials for various applications. The results of this study may have major significance for the commercial use of aluminum oxide nanofibers and can broaden the research field of composites.
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Affiliation(s)
- Anna Sukhanova
- Scientific Laboratory “Smart Materials and Structures”, Reshetnev Siberian State University of Science and Technology, 31 Krasnoyarsky Rabochy Av., Krasnoyarsk 660037, Russia
| | - Anatoly Boyandin
- Scientific Laboratory “Smart Materials and Structures”, Reshetnev Siberian State University of Science and Technology, 31 Krasnoyarsky Rabochy Av., Krasnoyarsk 660037, Russia
- Institute of Biophysics, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/50 Akademgorodok, Krasnoyarsk 660036, Russia
| | - Natalya Ertiletskaya
- Scientific Laboratory “Smart Materials and Structures”, Reshetnev Siberian State University of Science and Technology, 31 Krasnoyarsky Rabochy Av., Krasnoyarsk 660037, Russia
- Institute of Biophysics, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/50 Akademgorodok, Krasnoyarsk 660036, Russia
| | - Mikhail Simunin
- Scientific Laboratory “Smart Materials and Structures”, Reshetnev Siberian State University of Science and Technology, 31 Krasnoyarsky Rabochy Av., Krasnoyarsk 660037, Russia
- Department of Molecular Electronics, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50 Akademgorodok, Krasnoyarsk 660036, Russia
| | - Taisia Shalygina
- Scientific Laboratory “Smart Materials and Structures”, Reshetnev Siberian State University of Science and Technology, 31 Krasnoyarsky Rabochy Av., Krasnoyarsk 660037, Russia
| | - Anton Voronin
- Department of Molecular Electronics, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50 Akademgorodok, Krasnoyarsk 660036, Russia
- School of Engineering and Construction, Siberian Federal University, 82K Svobodnyi Av., Krasnoyarsk 660041, Russia
| | - Alexander Vasiliev
- Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/38 Akademgorodok, Krasnoyarsk 660036, Russia
- Institute of Engineering Physics and Radio Electronics, Siberian Federal University, 79 Svobodnyi Av., Krasnoyarsk 660041, Russia
| | - Ivan Nemtsev
- Department of Molecular Electronics, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50 Akademgorodok, Krasnoyarsk 660036, Russia
- Insitute of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodnyi Av., Krasnoyarsk 660041, Russia
| | - Mikhail Volochaev
- Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/38 Akademgorodok, Krasnoyarsk 660036, Russia
| | - Svetlana Pyatina
- Department of Molecular Electronics, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50 Akademgorodok, Krasnoyarsk 660036, Russia
- Insitute of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodnyi Av., Krasnoyarsk 660041, Russia
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Dielectric Studies of Bi2MoO6/Graphene Oxide and La-Doped Bi2MoO6/Graphene Oxide Nanocomposites. METALS 2021. [DOI: 10.3390/met11040559] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The mixed metal oxides Bi2MoO6 and La-doped Bi2MoO6 were prepared by the sol–gel method. Then, varying quantities of the as-prepared mixed metal oxides were blended with graphene oxide (GO), employing sonication, to obtain Bi2MoO6/GO (BM/GO) and La-Bi2MoO6/GO (LBM/GO) nanocomposites. These prepared materials were characterized by different techniques such as thermal gravimetric analysis (TGA), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), and transmission electron microscopy (TEM). Dielectric properties were studied by using a precision impedance analyzer. Dielectric constant and loss tan of the synthesized composites were studied as a function of frequency by using a precision impedance analyzer. Overall, the dielectric constant (ɛ’) observed for the LBM/GO composites was higher than that of BM/GO.
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Faingol'd ЕЕ, Zharkov IV, Bravaya NM, Panin AN, Saratovskikh SL, Babkina ON, Shilov GV. Sterically crowded dimeric diisobutylaluminum aryloxides: Synthesis, characteristics, and application as activators in homo- and copolymerization of olefins. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.07.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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