Polyacrylonitrile Fibers with a Gradient Silica Distribution as Precursors of Carbon-Silicon-Carbide Fibers.
| Title: | Polyacrylonitrile Fibers with a Gradient Silica Distribution as Precursors of Carbon-Silicon-Carbide Fibers. |
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| Authors: | Varfolomeeva LA; A. V. Topchiev Institute of Petrochemical Synthesis of Russian Academy of Sciences, Leninsky Av. 29, 119991 Moscow, Russia.; Skvortsov IY; A. V. Topchiev Institute of Petrochemical Synthesis of Russian Academy of Sciences, Leninsky Av. 29, 119991 Moscow, Russia.; Levin IS; A. V. Topchiev Institute of Petrochemical Synthesis of Russian Academy of Sciences, Leninsky Av. 29, 119991 Moscow, Russia.; Shandryuk GA; A. V. Topchiev Institute of Petrochemical Synthesis of Russian Academy of Sciences, Leninsky Av. 29, 119991 Moscow, Russia.; Patsaev TD; National Research Center 'Kurchatov Institute', 1, Akademika Kurchatova pl., 123182 Moscow, Russia.; Kulichikhin VG; A. V. Topchiev Institute of Petrochemical Synthesis of Russian Academy of Sciences, Leninsky Av. 29, 119991 Moscow, Russia. |
| Source: | Polymers [Polymers (Basel)] 2023 Jun 05; Vol. 15 (11). Date of Electronic Publication: 2023 Jun 05. |
| Publication Type: | Journal Article |
| Language: | English |
| Journal Info: | Publisher: MDPI Country of Publication: Switzerland NLM ID: 101545357 Publication Model: Electronic Cited Medium: Internet ISSN: 2073-4360 (Electronic) Linking ISSN: 20734360 NLM ISO Abbreviation: Polymers (Basel) Subsets: PubMed not MEDLINE |
| Imprint Name(s): | Original Publication: Basel : MDPI |
| Abstract: | This study presents preparing and characterization of polyacrylonitrile (PAN) fibers containing various content of tetraethoxysilane (TEOS) incorporated via mutual spinning solution or emulsion using wet and mechanotropic spinning methods. It was shown that the presence of TEOS in dopes does not affect their rheological properties. The coagulation kinetics of complex PAN solution was investigated by optical methods on the solution drop. It was shown that during the interdiffusion process phase separation occurs and TEOS droplets form and move in the middle of the dope's drop. Mechanotropic spinning induces the TEOS droplets to move to the fiber periphery. The morphology and structure of the fibers obtained were investigated by scanning and transmission electron microscopy, as well as X-ray diffraction methods. It was shown that during fiber spinning stages the transformation of the TEOS drops into solid silica particles takes place as a result of hydrolytic polycondensation. This process can be characterized as the sol-gel synthesis. The formation of nano-sized (3-30 nm) silica particles proceeds without particles aggregation, but in a mode of the distribution gradient along the fiber cross-section leading to the accumulation of the silica particles either in the fiber center (wet spinning) or in the fiber periphery (mechanotropic spinning). The prepared composite fibers were carbonized and according to XRD analysis of carbon fibers, the clear peaks corresponding to SiC were observed. These findings indicate the useful role of TEOS as a precursor agent for both, silica in PAN fibers and silicon carbide in carbon fibers that has potential applications in some advanced materials with high thermal properties. |
| References: | ACS Appl Mater Interfaces. 2017 May 3;9(17):15139-15147. (PMID: 28414423); Phys Rev B Condens Matter. 1992 Jul 1;46(1):1-13. (PMID: 10002176); ACS Appl Mater Interfaces. 2016 Oct 12;8(40):27218-27226. (PMID: 27661093); Langmuir. 2021 Jul 27;37(29):8886-8893. (PMID: 34275300); Ultrason Sonochem. 2019 Mar;51:399-405. (PMID: 30262234); Polymers (Basel). 2022 Oct 27;14(21):. (PMID: 36365543); Materials (Basel). 2022 Jan 21;15(3):. (PMID: 35160753); Polymers (Basel). 2018 Aug 02;10(8):. (PMID: 30960781); Materials (Basel). 2019 Jan 10;12(2):. (PMID: 30634560); Materials (Basel). 2022 Dec 22;16(1):. (PMID: 36614445); Membranes (Basel). 2023 Jan 06;13(1):. (PMID: 36676879) |
| Grant Information: | 1 United States CX CSRD VA |
| Contributed Indexing: | Keywords: carbon fibers with silicon carbide; fiber morphology; fiber spinning; mechanotropic spinning; polyacrylonitrile; precursor fibers; silica nanoparticles; sol-gel method; tetraethoxysilane; wet spinning |
| Entry Date(s): | Date Created: 20230610 Latest Revision: 20230612 |
| Update Code: | 20260130 |
| PubMed Central ID: | PMC10255590 |
| DOI: | 10.3390/polym15112579 |
| PMID: | 37299378 |
| Database: | MEDLINE |
Journal Article