1
|
Dang Y, Li T, Zhao Y, Duan L, Zhang J, Chen K, He L, Huang Q, Zhao C, Song Y. Polyborosilazanes with Controllable B/N Ratio for Si-B-C-N Ceramics. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1053. [PMID: 36770061 PMCID: PMC9918987 DOI: 10.3390/ma16031053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 01/15/2023] [Accepted: 01/16/2023] [Indexed: 06/18/2023]
Abstract
Polyborosilazanes with controllable B/N ratio were synthesized using high-boron-content m-carborane, dichloromethylsilane, and hexamethydisilazane. After high-temperature pyrolysis, Si-B-C-N quaternary ceramics with SiC and B4C as the main phases were obtained. The B/N ratio in the precursors corresponded to the change in the feeding ratio of carborane and dichloromethylsilane. The effects of boron content and B/N ratio on the ceramic precursors and microphase structure in Si-B-C-N quaternary ceramics were explored in detail through a series of analytical characterization methods. A high boron content results in a significant increase in the ceramic yield (up to 71 wt%) of polyborosilazanes, and at the same time, the B/N molar ratio was regulated from 28.4:1 to 1.62:1. The appearance of the B4C structure in the Si-B-C-N quaternary ceramics through the regulation of the B/N ratio, has rarely been reported.
Collapse
Affiliation(s)
- Yanpei Dang
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
- Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
- Qianwan Institute of CNITECH, Ningbo 315336, China
| | - Tianhao Li
- Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
- Qianwan Institute of CNITECH, Ningbo 315336, China
| | - Yangzhong Zhao
- Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
- Qianwan Institute of CNITECH, Ningbo 315336, China
| | - Liantai Duan
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
- Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
- Qianwan Institute of CNITECH, Ningbo 315336, China
| | - Jianning Zhang
- Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
- Qianwan Institute of CNITECH, Ningbo 315336, China
| | - Ke Chen
- Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
- Qianwan Institute of CNITECH, Ningbo 315336, China
| | - Liu He
- Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
- Qianwan Institute of CNITECH, Ningbo 315336, China
| | - Qing Huang
- Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
- Qianwan Institute of CNITECH, Ningbo 315336, China
| | - Chuanzhuang Zhao
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
| | - Yujie Song
- Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
- Qianwan Institute of CNITECH, Ningbo 315336, China
| |
Collapse
|
2
|
Bechelany MC, Proust V, Lale A, Balestrat M, Brioude A, Gervais C, Nishihora RK, Bernard S. From design to characterization of zirconium nitride/silicon nitride nanocomposites. Ann Ital Chir 2022. [DOI: 10.1016/j.jeurceramsoc.2022.01.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
|
3
|
Bechelany MC, Lale A, Balestrat M, Gervais C, Malo S, Nishihora RK, Bernard S. Ceramic nanocomposites prepared via the in situ formation of a novel TiZrN2 nanophase in a polymer-derived Si3N4 matrix. Ann Ital Chir 2022. [DOI: 10.1016/j.jeurceramsoc.2022.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
|
4
|
El Chawich G, El Hayek J, Rouessac V, Cot D, Rebière B, Habchi R, Garay H, Bechelany M, Zakhour M, Miele P, Salameh C. Design and Manufacturing of Si-Based Non-Oxide Cellular Ceramic Structures through Indirect 3D Printing. MATERIALS (BASEL, SWITZERLAND) 2022; 15:471. [PMID: 35057187 PMCID: PMC8781799 DOI: 10.3390/ma15020471] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Revised: 01/01/2022] [Accepted: 01/04/2022] [Indexed: 12/04/2022]
Abstract
Additive manufacturing of Polymer-Derived Ceramics (PDCs) is regarded as a disruptive fabrication process that includes several technologies such as light curing and ink writing. However, 3D printing based on material extrusion is still not fully explored. Here, an indirect 3D printing approach combining Fused Deposition Modeling (FDM) and replica process is demonstrated as a simple and low-cost approach to deliver complex near-net-shaped cellular Si-based non-oxide ceramic architectures while preserving the structure. 3D-Printed honeycomb polylactic acid (PLA) lattices were dip-coated with two preceramic polymers (polyvinylsilazane and allylhydridopolycarbosilane) and then converted by pyrolysis respectively into SiCN and SiC ceramics. All the steps of the process (printing resolution and surface finishing, cross-linking, dip-coating, drying and pyrolysis) were optimized and controlled. Despite some internal and surface defects observed by topography, 3D-printed materials exhibited a retention of the highly porous honeycomb shape after pyrolysis. Weight loss, volume shrinkage, roughness and microstructural evolution with high annealing temperatures are discussed. Our results show that the sacrificial mold-assisted 3D printing is a suitable rapid approach for producing customizable lightweight highly stable Si-based 3D non-oxide ceramics.
Collapse
Affiliation(s)
- Ghenwa El Chawich
- Institut Européen des Membranes, IEM, UMR 5635, University Montpellier, CNRS, ENSCM, CEDEX 5, 34095 Montpellier, France; (G.E.C.); (J.E.H.); (V.R.); (D.C.); (M.B.); (P.M.)
- Laboratoire de Chimie Physique des Matériaux/Plateforme de Recherche en Nanomatériaux et Nanotechnologies (LCPM/PR2N), Lebanese University, Beirut 90656, Lebanon; (R.H.); (M.Z.)
| | - Joelle El Hayek
- Institut Européen des Membranes, IEM, UMR 5635, University Montpellier, CNRS, ENSCM, CEDEX 5, 34095 Montpellier, France; (G.E.C.); (J.E.H.); (V.R.); (D.C.); (M.B.); (P.M.)
- Laboratoire de Chimie Physique des Matériaux/Plateforme de Recherche en Nanomatériaux et Nanotechnologies (LCPM/PR2N), Lebanese University, Beirut 90656, Lebanon; (R.H.); (M.Z.)
| | - Vincent Rouessac
- Institut Européen des Membranes, IEM, UMR 5635, University Montpellier, CNRS, ENSCM, CEDEX 5, 34095 Montpellier, France; (G.E.C.); (J.E.H.); (V.R.); (D.C.); (M.B.); (P.M.)
| | - Didier Cot
- Institut Européen des Membranes, IEM, UMR 5635, University Montpellier, CNRS, ENSCM, CEDEX 5, 34095 Montpellier, France; (G.E.C.); (J.E.H.); (V.R.); (D.C.); (M.B.); (P.M.)
| | - Bertrand Rebière
- Institut Charles Gerhardt Montpellier (ICGM), UMR 5253, University Montpellier, CNRS, ENSCM, CEDEX 5, 34095 Montpellier, France;
| | - Roland Habchi
- Laboratoire de Chimie Physique des Matériaux/Plateforme de Recherche en Nanomatériaux et Nanotechnologies (LCPM/PR2N), Lebanese University, Beirut 90656, Lebanon; (R.H.); (M.Z.)
| | - Hélène Garay
- Institut des Sciences Analytiques et de Physico-Chimie pour l’Evironnement et les Matériaux (IPREM), IMT Mines Alès, Université de Pau et des Pays de l’Adour, E2S UPPA, CNRS, 64053 Pau, France;
| | - Mikhael Bechelany
- Institut Européen des Membranes, IEM, UMR 5635, University Montpellier, CNRS, ENSCM, CEDEX 5, 34095 Montpellier, France; (G.E.C.); (J.E.H.); (V.R.); (D.C.); (M.B.); (P.M.)
| | - Mirvat Zakhour
- Laboratoire de Chimie Physique des Matériaux/Plateforme de Recherche en Nanomatériaux et Nanotechnologies (LCPM/PR2N), Lebanese University, Beirut 90656, Lebanon; (R.H.); (M.Z.)
| | - Philippe Miele
- Institut Européen des Membranes, IEM, UMR 5635, University Montpellier, CNRS, ENSCM, CEDEX 5, 34095 Montpellier, France; (G.E.C.); (J.E.H.); (V.R.); (D.C.); (M.B.); (P.M.)
- Institut Universitaire de France, IUF, MENESR, 1 rue Descartes, CEDEX 5, 75231 Paris, France
| | - Chrystelle Salameh
- Institut Européen des Membranes, IEM, UMR 5635, University Montpellier, CNRS, ENSCM, CEDEX 5, 34095 Montpellier, France; (G.E.C.); (J.E.H.); (V.R.); (D.C.); (M.B.); (P.M.)
| |
Collapse
|
5
|
Characterization and Microstructural Evolution of Continuous BN Ceramic Fibers Containing Amorphous Silicon Nitride. MATERIALS 2021; 14:ma14206194. [PMID: 34683786 PMCID: PMC8537905 DOI: 10.3390/ma14206194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Revised: 10/13/2021] [Accepted: 10/15/2021] [Indexed: 11/17/2022]
Abstract
Boron nitride (BN) ceramic fibers containing amounts of silicon nitride (Si3N4) were prepared using hybrid precursors of poly(tri(methylamino)borazine) (PBN) and polycarbosilane (PCS) via melt-spinning, curing, decarburization under NH3 to 1000 °C and pyrolysis up to 1600 °C under N2. The effect of Si3N4 contents on the microstructure of the BN/Si3N4 composite ceramics was investigated. Series of the BN/Si3N4 composite fibers containing various amounts of Si3N4 from 5 wt% to 25 wt% were fabricated. It was found that the crystallization of Si3N4 could be totally restrained when its content was below 25 wt% in the BN/Si3N4 composite ceramics at 1600 °C, and the amorphous BN/Si3N4 composite ceramic could be obtained with a certain ratio. The mean tensile strength and Young's modulus of the composite fibers correlated positively with the Si3N4 mass content, while an obvious BN (shell)/Si3N4 (core) was formed only when the Si3N4 content reached 25 wt%.
Collapse
|
6
|
Investigation of polymer-derived Si-(B)-C-N ceramic/reduced graphene oxide composite systems as active catalysts towards the hydrogen evolution reaction. Sci Rep 2020; 10:22003. [PMID: 33319809 PMCID: PMC7738544 DOI: 10.1038/s41598-020-78558-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 11/23/2020] [Indexed: 12/03/2022] Open
Abstract
Hydrogen Evolution Reaction (HER) is an attractive technology for chemical conversion of energy. Replacement of platinum with inexpensive and stable electrocatalysts remains a major bottleneck hampering large-scale hydrogen production by using clean and renewable energy sources. Here, we report electrocatalytically active and ultra-stable Polymer-Derived Ceramics towards HER. We successfully prepared ultrathin silicon and carbon (Si–C) based ceramic systems supported on electrically conducting 2D reduced graphene oxide (rGO) nanosheets with promising HER activity by varying the nature and the composition of the ceramic with the inclusion of nitrogen, boron and oxygen. Our results suggest that oxygen-enriched Si-B-C-N/rGO composites (O-SiBCN/rGO) display the strongest catalytic activity leading to an onset potential and a Tafel slope of − 340 mV and ~ 120 mV dec−1 respectively. O-SiBCN/rGO electrodes display stability over 170 h with minimal increase of 14% of the overpotential compared to ~ 1700% for commercial platinum nanoparticles. Our study provides new insights on the performance of ceramics as affordable and robust HER catalysts calling for further exploration of the electrocatalytic activity of such unconventional materials.
Collapse
|
7
|
In-Situ Synthesis and Characterization of Nanocomposites in the Si-Ti-N and Si-Ti-C Systems. Molecules 2020; 25:molecules25225236. [PMID: 33182722 PMCID: PMC7696609 DOI: 10.3390/molecules25225236] [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: 09/29/2020] [Revised: 10/30/2020] [Accepted: 11/03/2020] [Indexed: 12/02/2022] Open
Abstract
The pyrolysis (1000 °C) of a liquid poly(vinylmethyl-co-methyl)silazane modified by tetrakis(dimethylamido)titanium in flowing ammonia, nitrogen and argon followed by the annealing (1000–1800 °C) of as-pyrolyzed ceramic powders have been investigated in detail. We first provide a comprehensive mechanistic study of the polymer-to-ceramic conversion based on TG experiments coupled with in-situ mass spectrometry and ex-situ solid-state NMR and FTIR spectroscopies of both the chemically modified polymer and the pyrolysis intermediates. The pyrolysis leads to X-ray amorphous materials with chemical bonding and ceramic yields controlled by the nature of the atmosphere. Then, the structural evolution of the amorphous network of ammonia-, nitrogen- and argon-treated ceramics has been studied above 1000 °C under nitrogen and argon by X-ray diffraction and electron microscopy. HRTEM images coupled with XRD confirm the formation of nanocomposites after annealing at 1400 °C. Their unique nanostructural feature appears to be the result of both the molecular origin of the materials and the nature of the atmosphere used during pyrolysis. Samples are composed of an amorphous Si-based ceramic matrix in which TiNxCy nanocrystals (x + y = 1) are homogeneously formed “in situ” in the matrix during the process and evolve toward fully crystallized compounds as TiN/Si3N4, TiNxCy (x + y = 1)/SiC and TiC/SiC nanocomposites after annealing to 1800 °C as a function of the atmosphere.
Collapse
|
8
|
Jia Y, Ji X, Chen S, Gou Y, Li Y, Hu H. High-temperature properties and interface evolution of C/SiBCN composites prepared by precursor infiltration and pyrolysis. Ann Ital Chir 2019. [DOI: 10.1016/j.jeurceramsoc.2019.06.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
9
|
Morris LJ, Whittell GR, Eloi JC, Mahon MF, Marken F, Manners I, Hill MS. Ferrocene-Containing Polycarbosilazanes via the Alkaline-Earth-Catalyzed Dehydrocoupling of Silanes and Amines. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00444] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Louis J. Morris
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, United Kingdom
| | - George R. Whittell
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, United Kingdom
| | - Jean-Charles Eloi
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - Mary F. Mahon
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - Frank Marken
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - Ian Manners
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, United Kingdom
- Department of Chemistry, University of Victoria, Victoria, British Columbia V8P 5C2, Canada
| | - Michael S. Hill
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| |
Collapse
|
10
|
Yun J, Chen L, Zhao H, Zhang X, Ye W, Zhu D. Boric Acid as a Coupling Agent for Preparation of Phenolic Resin Containing Boron and Silicon with Enhanced Char Yield. Macromol Rapid Commun 2018; 40:e1800702. [PMID: 30556227 DOI: 10.1002/marc.201800702] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 11/26/2018] [Indexed: 11/10/2022]
Abstract
In this study, an innovative, facile, and low-cost method is developed to prepare phenolic resin (PR) containing boron and silicon (BSiPR). BSiPR is synthesized by a solvent-free, one-pot method using boric acid as the coupling agent instead of silane, and methyltriethoxysilane as the silicon source. The results show that boron and silicon elements are introduced into PR via BOC and BOSi structures. The char yield of the resulting resin at 800 °C is improved to 76%. The reasons for higher char yield are investigated. The formation of BOC can reduce the content of phenolic hydroxyl, which helps to decrease the weight loss. B2 O3 is also formed at 400 °C, and it can prevent the release of carbon oxides. Moreover, thermally stable BOSi and SiO structures remain stable during the pyrolysis. In addition, the mechanical and ablative properties of fiber-reinforced composites are also enhanced.
Collapse
Affiliation(s)
- Jin Yun
- Department of Applied Chemistry, School of Natural and Applied Sciences, Northwestern Polytechnical University, Xi'an, 710072, China.,Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Guangdong, 518057, P. R. China
| | - Lixin Chen
- Department of Applied Chemistry, School of Natural and Applied Sciences, Northwestern Polytechnical University, Xi'an, 710072, China.,Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Guangdong, 518057, P. R. China
| | - Hui Zhao
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Xiaofei Zhang
- Innovative Center for Advanced Materials, Hangzhou Dianzi University, Hangzhou, 310012, China
| | - Wenlong Ye
- Department of Applied Chemistry, School of Natural and Applied Sciences, Northwestern Polytechnical University, Xi'an, 710072, China.,Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Guangdong, 518057, P. R. China
| | - Defu Zhu
- Department of Applied Chemistry, School of Natural and Applied Sciences, Northwestern Polytechnical University, Xi'an, 710072, China.,Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Guangdong, 518057, P. R. China
| |
Collapse
|
11
|
Fonblanc D, Lopez-Ferber D, Wynn M, Lale A, Soleilhavoup A, Leriche A, Iwamoto Y, Rossignol F, Gervais C, Bernard S. Crosslinking chemistry of poly(vinylmethyl-co-methyl)silazanes toward low-temperature formable preceramic polymers as precursors of functional aluminium-modified Si–C–N ceramics. Dalton Trans 2018; 47:14580-14593. [DOI: 10.1039/c8dt03076f] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Study of the crosslinking chemistry of liquid polysilazanes with alane hydride-based complex.
Collapse
Affiliation(s)
| | | | - Mélanie Wynn
- IEM (Institut Europeen des Membranes)
- UMR 5635 (CNRS-ENSCM-UM)
- Universite Montpellier
- Place E. Bataillon
- Montpellier
| | | | - Anne Soleilhavoup
- Sorbonne Université
- Collège de France
- UMR 7574
- Laboratoire de Chimie de la Matière Condensée de Paris
- 75005 Paris
| | - Anne Leriche
- Laboratoire de Matériaux Céramiques et Procédés Associés LMCPA
- UPRES EA 2443
- UVHC-ISTV
- 59600 Maubeuge
- France
| | - Yuji Iwamoto
- Nagoya Inst Technol
- Grad Sch Engn
- Dept Life Sci Appl Chem
- Aichi 4668555
- Japan
| | | | - Christel Gervais
- Sorbonne Université
- Collège de France
- UMR 7574
- Laboratoire de Chimie de la Matière Condensée de Paris
- 75005 Paris
| | | |
Collapse
|
12
|
Schmidt M, Durif C, Acosta ED, Salameh C, Plaisantin H, Miele P, Backov R, Machado R, Gervais C, Alauzun JG, Chollon G, Bernard S. Molecular-Level Processing of Si-(B)-C Materials with Tailored Nano/Microstructures. Chemistry 2017; 23:17103-17117. [PMID: 28949424 DOI: 10.1002/chem.201703674] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Indexed: 01/15/2023]
Abstract
The design of Si-(B)-C materials is investigated, with detailed insight into the precursor chemistry and processing, the precursor-to-ceramic transformation, and the ceramic microstructural evolution at high temperatures. In the early stage of the process, the reaction between allylhydridopolycarbosilane (AHPCS) and borane dimethyl sulfide is achieved. This is investigated in detail through solid-state NMR and FTIR spectroscopy and elemental analyses for Si/B ratios ranging from 200 to 30. Boron-based bridges linking AHPCS monomeric fragments act as crosslinking units, extending the processability range of AHPCS and suppressing the distillation of oligomeric fragments during the low-temperature pyrolysis regime. Polymers with low boron contents display appropriate requirements for facile processing in solution, leading to the design of monoliths with hierarchical porosity, significant pore volume, and high specific surface area after pyrolysis. Polymers with high boron contents are more appropriate for the preparation of dense ceramics through direct solid shaping and pyrolysis. We provide a comprehensive study of the thermal decomposition mechanisms, and a subsequent detailed study of the high-temperature behavior of the ceramics produced at 1000 °C. The nanostructure and microstructure of the final SiC-based ceramics are intimately linked to the boron content of the polymers. B4 C/C/SiC nanocomposites can be obtained from the polymer with the highest boron content.
Collapse
Affiliation(s)
- Marion Schmidt
- IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Universite Montpellier, Place E. Bataillon, 34095, Montpellier, France.,Laboratoire des Composites ThermoStructuraux, UMR 5801, CNRS- SAFRAN Ceramics - CEA -, University of Bordeaux, 3, Allée de La Boétie, 33600, Pessac, France
| | - Charlotte Durif
- IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Universite Montpellier, Place E. Bataillon, 34095, Montpellier, France
| | - Emanoelle Diz Acosta
- IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Universite Montpellier, Place E. Bataillon, 34095, Montpellier, France.,Materials Engineering, Federal University of Santa Catarina, 88010-970, Florianópolis, Brazil
| | - Chrystelle Salameh
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, Collège de France, UMR 7574, Chimie de la Matière Condensée de Paris, 75005, Paris, France
| | - Hervé Plaisantin
- Laboratoire des Composites ThermoStructuraux, UMR 5801, CNRS- SAFRAN Ceramics - CEA -, University of Bordeaux, 3, Allée de La Boétie, 33600, Pessac, France
| | - Philippe Miele
- IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Universite Montpellier, Place E. Bataillon, 34095, Montpellier, France
| | - Rénal Backov
- Centre de Recherche Paul Pascal, Université de Bordeaux, UPR 8641 CNRS-115-, Avenue Albert Schweitzer, 33600, Pessac, France
| | - Ricardo Machado
- Materials Engineering, Federal University of Santa Catarina, 88010-970, Florianópolis, Brazil
| | - Christel Gervais
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, Collège de France, UMR 7574, Chimie de la Matière Condensée de Paris, 75005, Paris, France
| | - Johan G Alauzun
- Institut Charles Gerhardt Montpellier, UMR 5253, CNRS-UM-ENSCM, Université de Montpellier, Place Eugène Bataillon, CC1701, 34095, Montpellier, France
| | - Georges Chollon
- Laboratoire des Composites ThermoStructuraux, UMR 5801, CNRS- SAFRAN Ceramics - CEA -, University of Bordeaux, 3, Allée de La Boétie, 33600, Pessac, France
| | - Samuel Bernard
- IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Universite Montpellier, Place E. Bataillon, 34095, Montpellier, France.,Science des Procédés Céramiques et de Traitements de Surface (SPCTS), UMR CNRS 7315, Centre Européen de la Céramique, 12 rue Atlantis, 87068, Limoges Cedex, France
| |
Collapse
|
13
|
Viard A, Gottardo L, Lopez-Ferber D, Soleilhavoup A, Salameh C, Samal S, Gueguen Y, Rouxel T, Motz G, Babonneau F, Gervais C, Bernard S. Molecular design of melt-spinnable co-polymers as Si-B-C-N fiber precursors. Dalton Trans 2017; 46:13510-13523. [PMID: 28951922 DOI: 10.1039/c7dt02559a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two series of co-polymers with the general formula [B(C2H4SiCH3(NH)x(NCH3)y)3]n, i.e., composed of C2H4SiCH3(NH)x and C2H4SiCH3(NCH3)y (C2H4 = CHCH3, CH2CH2) building blocks in a well defined x : y ratio, have been synthesized by hydroboration of dichloromethylvinylsilane with borane dimethyl sulfide followed by successive reactions with lithium amide and methylamine according to controlled ratios. The role of the chemistry behind their syntheses has been studied in detail by solid-state NMR, FT-IR and elemental analyses. Then, the intimate relationship between the chemistry and the melt-spinnability of these polymers was discussed. By keeping x = 0.50 and increasing y above 0.50, i.e., obtaining methylamine excess, the co-polymers contained more ending groups and especially more tetracoordinated boron, thus allowing tuning very precisely the chemical structure of the preceramic polymer in order to meet the requirements for melt-spinning. The curing treatment under ammonia at 200 °C efficiently rendered the green fibers infusible before their subsequent pyrolysis under nitrogen at 1000 °C to generate Si-B-C-N ceramic fibers. Interestingly, it could be possible to produce also low diameter hollow fibers with relatively high mechanical properties for a further exploration as membrane materials.
Collapse
Affiliation(s)
- Antoine Viard
- IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Universite Montpellier, Place E. Bataillon, F-34095, Montpellier, France.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|