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Ma C, Li Z, Duan X, Cheng B, Cao H, Liao M. Molecular dynamics simulation and performance analysis of polyimide/aramid blends. J Mol Model 2024; 30:19. [PMID: 38165505 DOI: 10.1007/s00894-023-05820-0] [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: 11/22/2023] [Accepted: 12/25/2023] [Indexed: 01/03/2024]
Abstract
CONTEXT Polyimide (PI) and aramid, as functional polymer materials, have significant application prospects in special fields such as fire prevention and arc resistance. Blends of materials can not only improve the physical and chemical properties of a single material, but also save costs, so in order to improve the performance of polyimide, it is of great practical importance to study the properties of PI and aramid blends. Molecular dynamics simulation results showed that the two materials are compatible. The solubility parameters of PI tend to stabilize when the polymerization degree exceeded 10; aramid-1313 and aramid-1414 tend to stabilize at polymerization degrees of 10 and 15 or more, respectively. On this basis, the binding energy, diffusion coefficient, and mechanical properties of PI/aramid-1313 and PI/aramid-1414 blends with different mass ratios were analyzed. It was found that with the continuous increase of aramid content, the binding energy of the blends continue to improve, limiting the gas molecules diffusion ability. The mechanical properties of the materials also continue to improve. The simulation results provided in this paper can provide theoretical guidance for experiments on PI blends and shorten the research time and cost. METHODS To investigate the properties of PI and aramid blends, the PI/aramid composite system models were constructed using the Amorphous Cell module in Materials Studio software. Subsequently, molecular dynamics simulations of the PI/aramid composite system were performed using the Forcite module, while the interactions between atoms and molecules were described using the COMPASS II force field.
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Affiliation(s)
- Chang Ma
- School of Electrical Engineering, Dalian University of Technology, Dalian, China
| | - Zhongyu Li
- School of Electrical Engineering, Dalian University of Technology, Dalian, China
| | - Xiongying Duan
- School of Electrical Engineering, Dalian University of Technology, Dalian, China.
| | - Bairu Cheng
- School of Electrical Engineering, Dalian University of Technology, Dalian, China
| | - Hangwei Cao
- School of Electrical Engineering, Dalian University of Technology, Dalian, China
| | - Minfu Liao
- School of Electrical Engineering, Dalian University of Technology, Dalian, China
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Impact of Layered Perovskite Oxide La 0.85Yb 0.15AlO 3 on Structure and Transport Properties of Polyetherimide. Int J Mol Sci 2022; 24:ijms24010715. [PMID: 36614158 PMCID: PMC9821444 DOI: 10.3390/ijms24010715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 12/23/2022] [Accepted: 12/27/2022] [Indexed: 01/04/2023] Open
Abstract
This study aims to improve properties of Ultem® polyetherimide (PEI) by incorporating up to 2 wt% additives of the perovskite oxide La0.85Yb0.15AlO3 (LYA). The structure of dense PEI/LYA films was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) in combination with an analysis of their elemental composition using energy-dispersive spectroscopy (EDS). The PEI/LYA films exhibit a two-layer structure. Contact angle measurements revealed hydrophilization of the membrane surface enriched with the perovskite. The transport properties were tested via gas separation and pervaporation processes. The separation selectivity of He/N2 and O2/N2 gas pairs increased with the growth of the LYA content in the membranes. Pervaporation of a methanol(MeOH)-cyclohexane(CH) mixture was effective due to the high sorption of MeOH in the PEI/LYA membranes. The maximal pervaporation separation index was found for the PEI/LYA(2%) membrane.
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Selective Destruction of Soluble Polyurethaneimide as Novel Approach for Fabrication of Insoluble Polyimide Films. Polymers (Basel) 2022; 14:polym14194130. [PMID: 36236078 PMCID: PMC9572982 DOI: 10.3390/polym14194130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/18/2022] [Accepted: 09/23/2022] [Indexed: 12/05/2022] Open
Abstract
Polymeric coatings and membranes with extended stability toward a wide range of organic solvents are practical for application in harsh environments; on the other hand, such stability makes their processing quite difficult. In this work, we propose a novel method for the fabrication of films based on non-soluble polymers. The film is made from the solution of block copolymer containing both soluble and insoluble blocks followed by selective decomposition of soluble blocks. To prove this concept, we synthesized copolymer [(imide)n-(polyurethane)]m, in which the imide blocks were combined with polyurethane blocks based on polycaprolactone. By selective hydrolysis of urethane blocks in the presence of acid, it was possible to obtain the insoluble polyimide film for the first time. It was shown that the combination of thermal and acid treatment allowed almost complete removal of urethane blocks from the initial copolymer chains. IR spectroscopy, TGA, DSC and DMA methods were used to study the evaluation of the structure and properties of polymeric material as a result of thermal oxidation and hydrolysis by acid. It was shown that the polymeric films obtained by controlled decomposition were not soluble in aprotic solvent, such as dimethylformamide, n-methylpyrrolidone and dimethyl sulfoxide, and showed very close similarity to the homopolymer consisting of the same imide monomer, poly-(4,4'oxydiphenylene)pyromellitimide, confirming the feasibility of the proposed concept and its perspectives for fabrication of organic solvent-resistant membranes.
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Dobrovskiy AY, Nazarychev VM, Volgin IV, Lyulin SV. The Transport Properties of Semi-Crystalline Polyetherimide BPDA-P3 in Amorphous and Ordered States: Computer Simulations. MEMBRANES 2022; 12:856. [PMID: 36135875 PMCID: PMC9504751 DOI: 10.3390/membranes12090856] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 08/29/2022] [Accepted: 08/30/2022] [Indexed: 06/16/2023]
Abstract
The effect of polymer chain ordering on the transport properties of the polymer membrane was examined for the semi-crystalline heterocyclic polyetherimide (PEI) BPDA-P3 based on 3,3',4,4'-biphenyltetracarboxylic dianhydride (BPDA) and diamine 1,4-bis [4-(4-aminophenoxy)phenoxy]benzene (P3). All-atom Molecular Dynamics (MD) simulations were used to investigate the gas diffusion process carried through the pores of a free volume several nanometers in size. The long-term (~30 μs) MD simulations of BPDA-P3 were performed at T = 600 K, close to the experimental value of the melting temperature (Tm ≈ 577 K). It was found during the simulations that the transition of the PEI from an amorphous state to an ordered one occurred. We determined a decrease in solubility for both the gases examined (CO2 and CH4), caused by the redistribution of free volume elements occurring during the structural ordering of the polymer chains in glassy state (Tg ≈ 487 K). By analyzing the diffusion coefficients in the ordered state, the presence of gas diffusion anisotropy was found. However, the averaged values of the diffusion coefficients did not differ from each other in the amorphous and ordered states. Thus, permeability in the observed system is primarily determined by gas solubility, rather than by gas diffusion.
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Affiliation(s)
| | | | | | - Sergey V. Lyulin
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoj pr. 31 (V.O.), 199004 St. Petersburg, Russia; (A.Y.D.); (V.M.N.); (I.V.V.)
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Effect of ionic liquid on formation of copolyimide ultrafiltration membranes with improved rejection of La 3. Sci Rep 2022; 12:8200. [PMID: 35581282 PMCID: PMC9114424 DOI: 10.1038/s41598-022-12377-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 04/20/2022] [Indexed: 11/09/2022] Open
Abstract
Ultrafiltration (UF) as a widely used industrial separation method with optimal selection of membrane materials can be applied to extract rare earth metals from dilute solutions formed during the processing of electronic waste by hydrometallurgical methods. In the present work, promising UF copolyimide membranes were prepared using [hmim][TCB] ionic liquid (IL) co-solvent which can be considered as an environmentally friendly alternative to conventional solvents. The membranes were characterized by ATR-FTIR, TGA, SEM and quantum chemical calculations. A significant difference in morphology of these membranes was revealed by SEM of membrane cross-sections; the P84 membrane has finger-like structure of porous substrate in contrast to spongy structure of substrate for the P84/IL membrane due to a higher dynamic viscosity of the casting solution. The transport parameters were determined in ultrafiltration tests with pure water and an aqueous solution of bovine serum albumin. The addition of ionic liquid to the P84 casting solution increases the performance of the membrane. The rejection capacity was evaluated with respect to La3+ in the form of a lanthanum alizarin complex (LAC) in aqueous acetone solution. The P84 membrane prepared using IL showed a high rejection (98.5%) with respect to LAC, as well as a significant productivity.
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El-Okazy MA, Liu L, Abdellah MH, Goudeli E, Kentish SE. Gas sorption and diffusion in perfluoro(butenyl vinyl ether) based perfluoropolymeric membranes. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2021.120095] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Olariu MA, Hamciuc C, Asandulesa M, Hamciuc E, Epure E, Tsakiris V, Lisa G. Study on highly thermostable low‐k polymer films based on
fluorene‐containing
polyetherimides. POLYM ENG SCI 2021. [DOI: 10.1002/pen.25792] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Marius Andrei Olariu
- Electrical Engineering Faculty, Department of Electrical Measurements and Materials “Gh. Asachi” Technical University Iasi Romania
- R&D Department Prosupport Consulting SRL Iasi Romania
| | | | | | - Elena Hamciuc
- “Petru Poni” Institute of Macromolecular Chemistry Iasi Romania
| | - Elena‐Luiza Epure
- Faculty of Chemical Engineering and Environmental Protection “Cristofor Simionescu”, Department of Natural and Synthetic Polymers “Gh. Asachi” Technical University of Iasi Iasi Romania
| | - Violeta Tsakiris
- Department of Composite and Polymer Metallic Materials INCDIE ICPE‐CA Bucharest Romania
| | - Gabriela Lisa
- Faculty of Chemical Engineering and Environmental Protection “Cristofor Simionescu”, Department of Chemical Engineering “Gh. Asachi” Technical University of Iasi Iasi Romania
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Kuryndin I, Kostromin S, Popova E, Borisov I, Bakhtin D, Mamalimov R, Chervov A, Volkov A, Bronnikov S. Gas permeability and mechanical properties of polyethylene films subjected to ultraviolet irradiation. SEP SCI TECHNOL 2021. [DOI: 10.1080/01496395.2021.1972010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Ivan Kuryndin
- Physical Department, Russian Academy of Sciences, Institute of Macromolecular Compounds, St. Petersburg, Russian Federation
| | - Sergei Kostromin
- Physical Department, Russian Academy of Sciences, Institute of Macromolecular Compounds, St. Petersburg, Russian Federation
| | - Elena Popova
- Physical Department, Russian Academy of Sciences, Institute of Macromolecular Compounds, St. Petersburg, Russian Federation
| | - Ilya Borisov
- Department of Membrane and Membrane Technologies, Russian Academy of Sciences, A.v. Topchiev Institute of Petrochemical Synthesis, Moscow, Russian Federation
| | - Danila Bakhtin
- Department of Membrane and Membrane Technologies, Russian Academy of Sciences, A.v. Topchiev Institute of Petrochemical Synthesis, Moscow, Russian Federation
| | - Rustam Mamalimov
- Department of Solid State Physics, Russian Academy of Sciences, Ioffe Institute, St. Petersburg, Russian Federation
| | - Anton Chervov
- Department of Engineering and Pipelines Maintainability, OOO Slavneft-Krasnoyarskneftegaz, Krasnoyarsk, Russian Federation
| | - Alexey Volkov
- Department of Membrane and Membrane Technologies, Russian Academy of Sciences, A.v. Topchiev Institute of Petrochemical Synthesis, Moscow, Russian Federation
| | - Sergei Bronnikov
- Physical Department, Russian Academy of Sciences, Institute of Macromolecular Compounds, St. Petersburg, Russian Federation
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Toikka AM, Pulyalina AY, Petrov AV. Mobility of small molecules in membrane materials based on copolyimide P84. MENDELEEV COMMUNICATIONS 2021. [DOI: 10.1016/j.mencom.2021.01.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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IR spectral fingerprints of carbonyl groups in graphite oxide: a theoretical study. MENDELEEV COMMUNICATIONS 2021. [DOI: 10.1016/j.mencom.2021.01.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Phase Separation within a Thin Layer of Polymer Solution as Prompt Technique to Predict Membrane Morphology and Transport Properties. Polymers (Basel) 2020; 12:polym12122785. [PMID: 33255628 PMCID: PMC7761337 DOI: 10.3390/polym12122785] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 11/22/2020] [Accepted: 11/23/2020] [Indexed: 01/03/2023] Open
Abstract
In this work, the precipitation of a thin layer of a polymer solution was proposed to imitate the process of asymmetric membrane formation by a non-solvent induced phase separation (NIPS) technique. The phase inversion within the thin (<500 μm) and bulk (~2 cm) layer of polyamic-acid (PAA) in N-methyl-2-pyrrolidone (NMP) by using water as non-solvent was considered. It was shown that polymer films formed within the “limited” layer of polymer solution showed a good agreement with the morphology of corresponded asymmetric flat-sheet membranes even in the case of three-component casting solution (PAA/NMP/EtOH). At the same time, the polymer films formed on the interface of two bulk phases (“infinite” regime) did not fully correspond to the membrane structure. It was shown that up to 50% of NMP solvent in PAA solution can be replaced by ethanol, which can have a renewable origin. By changing the ethanol content in the casting solution, the average size of transport pores can be varied in the range of 12–80 nm, and the liquid permeance from 16.6 up to 207 kg/m2∙h∙bar. To summarize, the precipitation of polymer solution within the thin layer can be considered a prompt technique and a powerful tool for fast screening and optimization of the complex composition of casting solutions using its small quantity. Furthermore, the prediction of membrane morphology can be done without casting the membrane, further post-treatment procedures, and scanning electron microscopy (SEM) analysis.
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Li Y, Zhang M, Han E, Zhu L, Xiao M, Lei H, Niu H, Wu D. Effect of introduction of fluoromonomer copolymerization on properties of polyimide hollow fibers. HIGH PERFORM POLYM 2020. [DOI: 10.1177/0954008320943264] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The novel copolymerization polyimide (PI) hollow fibers (HFs) of 4,4′-(hexafluoroisopropylidene) diphthalic anhydride (6FDA) containing –CF3 groups were prepared and investigated through both simulation and experiment. To demonstrate the alteration attributable to the introduction of fluoromonomers, the condensed states of pyromellitic dianhydride (PMDA)/4,4′-oxybisbenzenamine (ODA), PMDA/6FDA/ODA, and 6FDA/ODA PI were constructed by Material Studio, and we simulated the mobility of molecular chain, free volume fraction, and O2/N2 dissolution–diffusion process. The molecular dynamics simulation results demonstrated that the properties of the copolymerized PI system with 6FDA were significantly improved, while the selectivity remained almost unchanged. Then, the films of copolymerized PI and HFs were prepared by the two-step method, and O2/N2 permeability of the PI copolymer films was characterized, indicating that although the gas permeation performance was greatly improved, the selectivity was not so satisfactory. However, the selection factor increased heavily after polydimethylsiloxane coating.
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Affiliation(s)
- Yinong Li
- State Key Laboratory of Chemical Resource Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, China
| | - Mengying Zhang
- Jiangsu Shino New Material and Technology Co., Ltd, Changzhou, China
| | - Enlin Han
- Jiangsu Shino New Material and Technology Co., Ltd, Changzhou, China
| | - Li Zhu
- State Key Laboratory of Chemical Resource Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, China
| | - Meifeng Xiao
- State Key Laboratory of Chemical Resource Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, China
| | - Huanyu Lei
- State Key Laboratory of Chemical Resource Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, China
| | - Hongqing Niu
- State Key Laboratory of Chemical Resource Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, China
| | - Dezhen Wu
- State Key Laboratory of Chemical Resource Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, China
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Pulyalina A, Faykov I, Nesterova V, Goikhman M, Podeshvo I, Loretsyan N, Novikov A, Gofman I, Toikka A, Polotskaya G. Novel Polyester Amide Membranes Containing Biquinoline Units and Complex with Cu(I): Synthesis, Characterization, and Approbation for n-Heptane Isolation from Organic Mixtures. Polymers (Basel) 2020; 12:polym12030645. [PMID: 32178305 PMCID: PMC7182820 DOI: 10.3390/polym12030645] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 03/04/2020] [Accepted: 03/10/2020] [Indexed: 02/04/2023] Open
Abstract
The wide possibilities of designing a chemical structure and creating complexes with transition metals make polymers of heteroaromatic structure interesting objects, from both scientific and practical aspects. In this work, modern biquinoline-containing polymers, namely polyester amide (PEA) and its metal–polymer complex (PEA–Cu(I)), were synthesized and used to form dense flat membranes. A comparative study of their morphology, same physical properties (density, free volume, and contact angles), and thermomechanical characteristics was carried out. The transport properties of the modern membranes were studied during pervaporation, to solve a problem of n-heptane isolation from its binary mixtures with thiophene and methanol. It was shown that only the PEA membrane is selective for the separation of thiophene impurities from the mixture with n-heptane. In pervaporation of methanol/n-heptane mixture, the РЕА–Cu(I) membrane exhibits significantly higher pervaporation separation index, as compared with that of the РЕА membrane.
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Affiliation(s)
- Alexandra Pulyalina
- Saint Petersburg State University, Institute of Chemistry, Universitetskiy pr. 26, 198504 Saint Petersburg, Russia; (I.F.); (V.N.); (A.N.); (A.T.); (G.P.)
- Correspondence: ; Tel.: +7-911-959-45-86
| | - Ilya Faykov
- Saint Petersburg State University, Institute of Chemistry, Universitetskiy pr. 26, 198504 Saint Petersburg, Russia; (I.F.); (V.N.); (A.N.); (A.T.); (G.P.)
| | - Vera Nesterova
- Saint Petersburg State University, Institute of Chemistry, Universitetskiy pr. 26, 198504 Saint Petersburg, Russia; (I.F.); (V.N.); (A.N.); (A.T.); (G.P.)
| | - Mikhail Goikhman
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. 31, 199004 Saint Petersburg, Russia; (M.G.); (I.P.); (N.L.); (I.G.)
| | - Irina Podeshvo
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. 31, 199004 Saint Petersburg, Russia; (M.G.); (I.P.); (N.L.); (I.G.)
| | - Nairi Loretsyan
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. 31, 199004 Saint Petersburg, Russia; (M.G.); (I.P.); (N.L.); (I.G.)
| | - Alexander Novikov
- Saint Petersburg State University, Institute of Chemistry, Universitetskiy pr. 26, 198504 Saint Petersburg, Russia; (I.F.); (V.N.); (A.N.); (A.T.); (G.P.)
| | - Iosif Gofman
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. 31, 199004 Saint Petersburg, Russia; (M.G.); (I.P.); (N.L.); (I.G.)
| | - Alexander Toikka
- Saint Petersburg State University, Institute of Chemistry, Universitetskiy pr. 26, 198504 Saint Petersburg, Russia; (I.F.); (V.N.); (A.N.); (A.T.); (G.P.)
| | - Galina Polotskaya
- Saint Petersburg State University, Institute of Chemistry, Universitetskiy pr. 26, 198504 Saint Petersburg, Russia; (I.F.); (V.N.); (A.N.); (A.T.); (G.P.)
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. 31, 199004 Saint Petersburg, Russia; (M.G.); (I.P.); (N.L.); (I.G.)
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Bakhtin DS, Kulikov LA, Maksimov AL, Volkov AV. Composite Membranes Based on the Poly(1-trimethylsylyl-1-propine): Influence of the Porous Aromatic Frameworks Produced from the Friedel–Crafts Reaction and Introduced into the Polymer Matrix. RUSS J APPL CHEM+ 2020. [DOI: 10.1134/s1070427220020147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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