1
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Prosvirnina AP, Bugrov AN, Bobrova NV, Sivtsov EV, Nikolaeva AL, Kamalov AM, Sokolova MP, Smirnov MA. Three-Dimensional Printed Shape Memory Gels Based on a Structured Disperse System with Hydrophobic Cellulose Nanofibers. Polymers (Basel) 2023; 15:3547. [PMID: 37688173 PMCID: PMC10490119 DOI: 10.3390/polym15173547] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 08/18/2023] [Accepted: 08/23/2023] [Indexed: 09/10/2023] Open
Abstract
Inks for 3D printing were prepared by dispersing bacterial cellulose nanofibers (CNF) functionalized with methacrylate groups in a polymerizable deep eutectic solvent (DES) based on choline chloride and acrylic acid with water as a cosolvent. After 3D printing and UV-curing, the double-network composite gel consisting of chemically and physically crosslinked structures composed from sub-networks of modified CNF and polymerized DES, respectively, was formed. The rheological properties of inks, as well as mechanical and shape memory properties of the 3D-printed gels, were investigated in dynamic and static modes. It was shown that the optimal amount of water allows improvement of the mechanical properties of the composite gel due to the formation of closer contacts between the modified CNF. The addition of 12 wt% water results in an increase in strength and ultimate elongation to 11.9 MPa and 300%, respectively, in comparison with 5.5 MPa and 100% for an anhydrous system. At the same time, the best shape memory properties were found for an anhydrous system: shape fixation and recovery coefficients were 80.0 and 95.8%, respectively.
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Affiliation(s)
- Angelina P. Prosvirnina
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy Pr. 31, Saint Petersburg 199004, Russia
| | - Alexander N. Bugrov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy Pr. 31, Saint Petersburg 199004, Russia
- Department of Physical Chemistry, Saint Petersburg Electrotechnical University (ETU “LETI”), ul. Professora Popova 5, Saint Petersburg 197022, Russia
| | - Natalya V. Bobrova
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy Pr. 31, Saint Petersburg 199004, Russia
| | - Eugene V. Sivtsov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy Pr. 31, Saint Petersburg 199004, Russia
- Saint Petersburg State Institute of Technology, Moskovsky Pr. 24-26/49, Saint Petersburg 190013, Russia
| | - Alexandra L. Nikolaeva
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy Pr. 31, Saint Petersburg 199004, Russia
| | - Almaz M. Kamalov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy Pr. 31, Saint Petersburg 199004, Russia
| | - Maria P. Sokolova
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy Pr. 31, Saint Petersburg 199004, Russia
| | - Michael A. Smirnov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy Pr. 31, Saint Petersburg 199004, Russia
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Nikolaeva AL, Bugrov AN, Sokolova MP, Kuntsman IV, Vlasova EN, Ivan'kova EM, Abalov IV, Gofman IV. Synergistic Effect of Metal Oxide and Carbon Nanoparticles on the Thermal and Mechanical Properties of Polyimide Composite Films. Polymers (Basel) 2023; 15:polym15102298. [PMID: 37242873 DOI: 10.3390/polym15102298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 05/10/2023] [Accepted: 05/11/2023] [Indexed: 05/28/2023] Open
Abstract
In this paper, we report on novel polyimide (PI) nanocomposites filled with binary mixtures of metal oxide (either TiO2 or ZrO2) nanoparticles and nanocarbon (either carbon nanofibers (CNFs) or functionalized carbon nanotubes (CNTfs)). The structure and morphology of the materials obtained were comprehensively studied. An exhaustive investigation of their thermal and mechanical properties was performed. We revealed a synergistic effect of the nanoconstituents with regard to a number of functional characteristics of the PIs compared with single-filler nanocomposites, including thermal stability, stiffness (below and above glass transition temperature), yield point, and temperature of flowing. Moreover, the possibility of manipulating the properties of the materials by choosing a proper combination of the nanofillers was demonstrated. The results obtained can become a platform in the design of PI-based engineering materials with tailored characteristics capable of operating in extreme conditions.
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Affiliation(s)
- Alexandra L Nikolaeva
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 St. Petersburg, Russia
| | - Alexander N Bugrov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 St. Petersburg, Russia
- Department of Physical Chemistry, Saint Petersburg Electrotechnical University (ETU "LETI"), ul. Professora Popova 5, 197022 St. Petersburg, Russia
| | - Maria P Sokolova
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 St. Petersburg, Russia
| | - Igor V Kuntsman
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 St. Petersburg, Russia
| | - Elena N Vlasova
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 St. Petersburg, Russia
| | - Elena M Ivan'kova
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 St. Petersburg, Russia
| | - Ivan V Abalov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 St. Petersburg, Russia
| | - Iosif V Gofman
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 St. Petersburg, Russia
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3
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Petrova VA, Dubashynskaya NV, Gofman IV, Golovkin AS, Mishanin AI, Aquino AD, Mukhametdinova DV, Nikolaeva AL, Ivan'kova EM, Baranchikov AE, Yakimansky AV, Ivanov VK, Skorik YA. Biocomposite films based on chitosan and cerium oxide nanoparticles with promising regenerative potential. Int J Biol Macromol 2023; 229:329-343. [PMID: 36592852 DOI: 10.1016/j.ijbiomac.2022.12.305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 12/24/2022] [Accepted: 12/26/2022] [Indexed: 12/31/2022]
Abstract
Polymeric nanocomposite materials have great potential in the development of tissue-engineered scaffolds because they affect the structure and properties of polymeric materials and regulate cell proliferation and differentiation. In this work, cerium oxide nanoparticles (CeONPs) were incorporated into a chitosan (CS) film to improve the proliferation of multipotent mesenchymal stem cells (MSCs). The citrate-stabilized CeONPs with a negative ζ-potential (-25.0 mV) were precoated with CS to obtain positively charged particles (+20.3 mV) and to prevent their aggregation in the composite solution. The composite CS-CeONP films were prepared in the salt and basic forms using a dry-cast process. The films obtained in both forms were characterized by a uniform distribution of CeONPs. The incorporation of CeONPs into the salt form of CS increased the stiffness of the CS-CeONP film, while the subsequent conversion of the film to the basic form resulted in a decrease in both the Young's modulus and the yield stress. The redox activity (Ce4+ ⇌ Ce3+) of cerium oxide in the CS-CeONP film was confirmed by thermal oxidative degradation. In vitro culture of MSCs showed that the CS-CeONP film has good biocompatibility, and in vivo experiments demonstrated its substantial regenerative potential.
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Affiliation(s)
- Valentina A Petrova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation
| | - Natallia V Dubashynskaya
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation
| | - Iosif V Gofman
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation
| | - Alexey S Golovkin
- Almazov National Medical Research Centre, Akkuratova 2, St. Petersburg 197341, Russian Federation
| | - Alexander I Mishanin
- Almazov National Medical Research Centre, Akkuratova 2, St. Petersburg 197341, Russian Federation
| | - Arthur D Aquino
- Almazov National Medical Research Centre, Akkuratova 2, St. Petersburg 197341, Russian Federation
| | - Daria V Mukhametdinova
- Almazov National Medical Research Centre, Akkuratova 2, St. Petersburg 197341, Russian Federation
| | - Alexandra L Nikolaeva
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation
| | - Elena M Ivan'kova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation
| | - Alexander E Baranchikov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii 31, Moscow 119071, Russian Federation
| | - Alexander V Yakimansky
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation
| | - Vladimir K Ivanov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii 31, Moscow 119071, Russian Federation
| | - Yury A Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi VO 31, St. Petersburg 199004, Russian Federation.
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Nikolaeva AL, Bugrov AN, Sokolova MP, Ivan’kova EM, Abalov IV, Vlasova EN, Gofman IV. Metal Oxide Nanoparticles: An Effective Tool to Modify the Functional Properties of Thermally Stable Polyimide Films. Polymers (Basel) 2022; 14:polym14132580. [PMID: 35808624 PMCID: PMC9269602 DOI: 10.3390/polym14132580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 06/21/2022] [Accepted: 06/23/2022] [Indexed: 11/16/2022] Open
Abstract
A series of polyimide/metal oxide (either ZrO2 or TiO2) nanocomposite films were fabricated based on two polymer matrices. The prepared films were characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM), and X-ray diffraction analysis (XRD), and their thermal and mechanical properties were investigated with the use of thermogravimetric (TGA), differential thermal analysis (DTA), and thermomechanical analysis (TMA). We have found out that functional properties of the obtained materials are determined by a number of factors, not only the type, size, surface functionality, and concentration of the nanofiller, but also the chemical structure of the matrix polyimide. We have demonstrated some trends in the thermal and mechanical behavior of the materials depending on these features. The data could be of great interest in the areas where new materials with improved functional characteristics are needed.
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Affiliation(s)
- Alexandra L. Nikolaeva
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 St. Petersburg, Russia; (A.N.B.); (M.P.S.); (E.M.I.); (I.V.A.); (E.N.V.); (I.V.G.)
- Correspondence:
| | - Alexander N. Bugrov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 St. Petersburg, Russia; (A.N.B.); (M.P.S.); (E.M.I.); (I.V.A.); (E.N.V.); (I.V.G.)
- Department of Physical Chemistry, Saint Petersburg Electrotechnical University (ETU “LETI”), ul. Professora Popova 5, 197022 St. Petersburg, Russia
| | - Maria P. Sokolova
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 St. Petersburg, Russia; (A.N.B.); (M.P.S.); (E.M.I.); (I.V.A.); (E.N.V.); (I.V.G.)
| | - Elena M. Ivan’kova
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 St. Petersburg, Russia; (A.N.B.); (M.P.S.); (E.M.I.); (I.V.A.); (E.N.V.); (I.V.G.)
| | - Ivan V. Abalov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 St. Petersburg, Russia; (A.N.B.); (M.P.S.); (E.M.I.); (I.V.A.); (E.N.V.); (I.V.G.)
| | - Elena N. Vlasova
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 St. Petersburg, Russia; (A.N.B.); (M.P.S.); (E.M.I.); (I.V.A.); (E.N.V.); (I.V.G.)
| | - Iosif V. Gofman
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 St. Petersburg, Russia; (A.N.B.); (M.P.S.); (E.M.I.); (I.V.A.); (E.N.V.); (I.V.G.)
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5
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Smirnov MA, Fedotova VS, Sokolova MP, Nikolaeva AL, Elokhovsky VY, Karttunen M. Polymerizable Choline- and Imidazolium-Based Ionic Liquids Reinforced with Bacterial Cellulose for 3D-Printing. Polymers (Basel) 2021; 13:3044. [PMID: 34577946 PMCID: PMC8471885 DOI: 10.3390/polym13183044] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 09/04/2021] [Accepted: 09/06/2021] [Indexed: 11/23/2022] Open
Abstract
In this work, a novel approach is demonstrated for 3D-printing of bacterial cellulose (BC) reinforced UV-curable ion gels using two-component solvents based on 1-butyl-3-methylimidazolium chloride or choline chloride combined with acrylic acid. Preservation of cellulose's crystalline and nanofibrous structure is demonstrated using wide-angle X-ray diffraction (WAXD) and atomic force microscopy (AFM). Rheological measurements reveal that cholinium-based systems, in comparison with imidazolium-based ones, are characterised with lower viscosity at low shear rates and improved stability against phase separation at high shear rates. Grafting of poly(acrylic acid) onto the surfaces of cellulose nanofibers during UV-induced polymerization of acrylic acid results in higher elongation at break for choline chloride-based compositions: 175% in comparison with 94% for imidazolium-based systems as well as enhanced mechanical properties in compression mode. As a result, cholinium-based BC ion gels containing acrylic acid can be considered as more suitable for 3D-printing of objects with improved mechanical properties due to increased dispersion stability and filler/matrix interaction.
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Affiliation(s)
- Michael A. Smirnov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, V.O. Bolshoi pr. 31, 199004 St. Petersburg, Russia; (V.S.F.); (M.P.S.); (A.L.N.); (V.Y.E.)
- Institute of Chemistry, Saint Petersburg State University, Universitetsky pr. 26, Peterhof, 198504 St. Petersburg, Russia
| | - Veronika S. Fedotova
- Institute of Macromolecular Compounds, Russian Academy of Sciences, V.O. Bolshoi pr. 31, 199004 St. Petersburg, Russia; (V.S.F.); (M.P.S.); (A.L.N.); (V.Y.E.)
- Institute of Chemistry, Saint Petersburg State University, Universitetsky pr. 26, Peterhof, 198504 St. Petersburg, Russia
| | - Maria P. Sokolova
- Institute of Macromolecular Compounds, Russian Academy of Sciences, V.O. Bolshoi pr. 31, 199004 St. Petersburg, Russia; (V.S.F.); (M.P.S.); (A.L.N.); (V.Y.E.)
| | - Alexandra L. Nikolaeva
- Institute of Macromolecular Compounds, Russian Academy of Sciences, V.O. Bolshoi pr. 31, 199004 St. Petersburg, Russia; (V.S.F.); (M.P.S.); (A.L.N.); (V.Y.E.)
| | - Vladimir Yu. Elokhovsky
- Institute of Macromolecular Compounds, Russian Academy of Sciences, V.O. Bolshoi pr. 31, 199004 St. Petersburg, Russia; (V.S.F.); (M.P.S.); (A.L.N.); (V.Y.E.)
| | - Mikko Karttunen
- Institute of Macromolecular Compounds, Russian Academy of Sciences, V.O. Bolshoi pr. 31, 199004 St. Petersburg, Russia; (V.S.F.); (M.P.S.); (A.L.N.); (V.Y.E.)
- Department of Chemistry, The University of Western Ontario, 1151 Richmond Street, London, ON N6A 5B7, Canada
- Department of Physics and Astronomy, The University of Western Ontario, 1151 Richmond Street, London, ON N6A 5B7, Canada
- The Centre of Advanced Materials and Biomaterials Research, The University of Western Ontario, 1151 Richmond Street, London, ON N6A 5B7, Canada
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6
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Gofman IV, Nikolaeva AL, Khripunov AK, Ivan’kova EM, Shabunin AS, Yakimansky AV, Romanov DP, Popov AL, Ermakov AM, Solomevich SO, Bychkovsky PM, Baranchikov AE, Ivanov VK. Bacterial Cellulose-Based Nanocomposites Containing Ceria and Their Use in the Process of Stem Cell Proliferation. Polymers (Basel) 2021; 13:polym13121999. [PMID: 34207191 PMCID: PMC8234971 DOI: 10.3390/polym13121999] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 06/15/2021] [Accepted: 06/16/2021] [Indexed: 02/06/2023] Open
Abstract
A technique for the fabrication of bacterial cellulose-based films with CeO2 nanofiller has been developed. The structural and morphological characteristics of the materials have been studied, their thermal and mechanical properties in dry and swollen states having been determined. The preparation methodology makes it possible to obtain composites with a uniform distribution of nanoparticles. The catalytic effect of ceria, regarding the thermal oxidative destruction of cellulose, has been confirmed by TGA and DTA methods. An increase in CeO2 content led to an increase in the elastic modulus (a 1.27-fold increase caused by the introduction of 5 wt.% of the nanofiller into the polymer) and strength of the films. This effect is explained by the formation of additional links between polymer macro-chains via the nanoparticles’ surface. The materials fabricated were characterized by a limited ability to swell in water. Swelling caused a 20- to 30-fold reduction in the stiffness of the material, the mechanical properties of the films in a swollen state remaining germane to their practical use. The application of the composite films in cell engineering as substrates for the stem cells’ proliferation has been studied. The increase in CeO2 content in the films enhanced the proliferative activity of embryonic mouse stem cells. The cells cultured on the scaffold containing 5 wt.% of ceria demonstrated increased cell survival and migration activity. An analysis of gene expression confirmed improved cultivation conditions on CeO2-containing scaffolds.
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Affiliation(s)
- Iosif V. Gofman
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 Saint Petersburg, Russia; (A.L.N.); (A.K.K.); (E.M.I.); (A.V.Y.)
- Correspondence:
| | - Alexandra L. Nikolaeva
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 Saint Petersburg, Russia; (A.L.N.); (A.K.K.); (E.M.I.); (A.V.Y.)
| | - Albert K. Khripunov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 Saint Petersburg, Russia; (A.L.N.); (A.K.K.); (E.M.I.); (A.V.Y.)
| | - Elena M. Ivan’kova
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 Saint Petersburg, Russia; (A.L.N.); (A.K.K.); (E.M.I.); (A.V.Y.)
| | - Anton S. Shabunin
- H. Turner National Medical Research Center for Children’s Orthopedics and Trauma Surgery, Pushkin, 196603 Saint Petersburg, Russia;
| | - Alexander V. Yakimansky
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 Saint Petersburg, Russia; (A.L.N.); (A.K.K.); (E.M.I.); (A.V.Y.)
- Institute of Chemistry, Saint Petersburg State University, 198504 Saint Petersburg, Russia
| | - Dmitriy P. Romanov
- Institute of Silicate Chemistry, Russian Academy of Sciences, 199034 Saint Petersburg, Russia;
| | - Anton L. Popov
- Institute of Theoretical and Experimental Biophysics, 142290 Pushchino, Russia; (A.L.P.); (A.M.E.)
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia; (A.E.B.); (V.K.I.)
| | - Artem M. Ermakov
- Institute of Theoretical and Experimental Biophysics, 142290 Pushchino, Russia; (A.L.P.); (A.M.E.)
| | - Sergey O. Solomevich
- Research Institute for Physical and Chemical Problems, Belarusian State University, 220030 Minsk, Belarus; (S.O.S.); (P.M.B.)
| | - Pavel M. Bychkovsky
- Research Institute for Physical and Chemical Problems, Belarusian State University, 220030 Minsk, Belarus; (S.O.S.); (P.M.B.)
| | - Alexander E. Baranchikov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia; (A.E.B.); (V.K.I.)
| | - Vladimir K. Ivanov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia; (A.E.B.); (V.K.I.)
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Nikolaeva AL, Gofman IV, Yakimansky AV, Ivan’kova EM, Abalov IV, Baranchikov AE, Ivanov VK. Polyimide-Based Nanocomposites with Binary CeO 2/Nanocarbon Fillers: Conjointly Enhanced Thermal and Mechanical Properties. Polymers (Basel) 2020; 12:E1952. [PMID: 32872303 PMCID: PMC7565313 DOI: 10.3390/polym12091952] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 08/13/2020] [Accepted: 08/24/2020] [Indexed: 11/16/2022] Open
Abstract
To design novel polymer materials with optimal properties relevant to industrial usage, it would seem logical to modify polymers with reportedly good functionality, such as polyimides (PIs). We have created a set of PI-based nanocomposites containing binary blends of CeO2 with carbon nanoparticles (nanocones/discs or nanofibres), to improve a number of functional characteristics of the PIs. The prime novelty of this study is in a search for a synergistic effect amidst the nanofiller moieties regarding the thermal and the mechanical properties of PIs. In this paper, we report on the structure, thermal, and mechanical characteristics of the PI-based nanocomposites with binary fillers. We have found that, with a certain composition, the functional performance of a material can be substantially improved. For example, a PI containing SO2-groups in its macrochains not only had its thermal stability enhanced (by ~20 °C, 10% weight loss up to 533 °C) but also had its stiffness increased by more than 10% (Young's modulus as high as 2.9-3.0 GPa) in comparison with the matrix PI. In the case of a PI with no sulfonic groups, binary fillers increased stiffness of the polymer above its glass transition temperature, thereby widening its working temperature range. The mechanisms of these phenomena are discussed. Thus, this study could contribute to the design of new composite materials with controllable and improved functionality.
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Affiliation(s)
- Alexandra L. Nikolaeva
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 Saint Petersburg, Russia; (I.V.G.); (A.V.Y.); (E.M.I.); (I.V.A.)
| | - Iosif V. Gofman
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 Saint Petersburg, Russia; (I.V.G.); (A.V.Y.); (E.M.I.); (I.V.A.)
| | - Alexander V. Yakimansky
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 Saint Petersburg, Russia; (I.V.G.); (A.V.Y.); (E.M.I.); (I.V.A.)
- Institute of Chemistry, Saint Petersburg State University, 198504 Saint Petersburg, Russia
| | - Elena M. Ivan’kova
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 Saint Petersburg, Russia; (I.V.G.); (A.V.Y.); (E.M.I.); (I.V.A.)
| | - Ivan V. Abalov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 Saint Petersburg, Russia; (I.V.G.); (A.V.Y.); (E.M.I.); (I.V.A.)
| | - Alexander E. Baranchikov
- Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 119991 Moscow, Russia; (A.E.B.); (V.K.I.)
| | - Vladimir K. Ivanov
- Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 119991 Moscow, Russia; (A.E.B.); (V.K.I.)
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8
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Smirnov MA, Nikolaeva AL, Vorobiov VK, Bobrova NV, Abalov IV, Smirnov AV, Sokolova MP. Ionic Conductivity and Structure of Chitosan Films Modified with Lactic Acid-Choline Chloride NADES. Polymers (Basel) 2020; 12:E350. [PMID: 32041166 PMCID: PMC7077437 DOI: 10.3390/polym12020350] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 01/31/2020] [Accepted: 02/02/2020] [Indexed: 01/06/2023] Open
Abstract
The natural deep eutectic solvent (NADES) based on choline chloride (ChCl) and lactic acid (LA) was used for the preparation of chitosan (CS) films by the solution casting method. The content of NADES in films was from 0 to 82 wt%. The impact of NADES on the morphology and crystalline structure of films was investigated using scanning electron microscopy as well as wide-angle and small-angle X-ray scattering. The experimental results allow to propose CS chains swelling in NADES. FTIR spectroscopy confirms the interactions between CS and NADES components via the formation of hydrogen and ion bonds. The thermal properties of the composite films were studied by simultaneous thermogravimetric and differential thermal analysis. Thermomechanical analysis demonstrated appearance of two transitions at temperatures between -23 and -5 °C and 54-102 °C depending on NADES content. It was found that electrical conductivity of film with 82 wt% of NADES reaches 1.7 mS/cm. The influence of the composition and structure of films on the charge carriers concentration and their mobility is discussed.
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Affiliation(s)
- Mikhail A. Smirnov
- Institute of Macromolecular Compounds Russian Academy of Sciences, Bolshoy pr. 31, Saint Petersburg 199004, Russia; (M.A.S.); (A.L.N.); (V.K.V.); (N.V.B.); (I.V.A.)
| | - Alexandra L. Nikolaeva
- Institute of Macromolecular Compounds Russian Academy of Sciences, Bolshoy pr. 31, Saint Petersburg 199004, Russia; (M.A.S.); (A.L.N.); (V.K.V.); (N.V.B.); (I.V.A.)
| | - Vitaly K. Vorobiov
- Institute of Macromolecular Compounds Russian Academy of Sciences, Bolshoy pr. 31, Saint Petersburg 199004, Russia; (M.A.S.); (A.L.N.); (V.K.V.); (N.V.B.); (I.V.A.)
| | - Natalia V. Bobrova
- Institute of Macromolecular Compounds Russian Academy of Sciences, Bolshoy pr. 31, Saint Petersburg 199004, Russia; (M.A.S.); (A.L.N.); (V.K.V.); (N.V.B.); (I.V.A.)
| | - Ivan V. Abalov
- Institute of Macromolecular Compounds Russian Academy of Sciences, Bolshoy pr. 31, Saint Petersburg 199004, Russia; (M.A.S.); (A.L.N.); (V.K.V.); (N.V.B.); (I.V.A.)
| | - Alexander V. Smirnov
- Physics and Technology Faculty, ITMO University, Kronverskii prosp. 49, Saint Petersburg 197101, Russia;
| | - Maria P. Sokolova
- Institute of Macromolecular Compounds Russian Academy of Sciences, Bolshoy pr. 31, Saint Petersburg 199004, Russia; (M.A.S.); (A.L.N.); (V.K.V.); (N.V.B.); (I.V.A.)
- Saint Petersburg State University, Institute of Chemistry, Universitetskaya nab. 7-9, Saint Petersburg 198504, Russia
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