HYDROBORATION SYNTHESIS, CHARACTERIZATION AND BIOLOGICAL ACTIVITY OF NOVEL CYCLIC PRECERAMIC POLYMERS: TRANSITION TO SiBOC CERAMICS
Novel preceramic polymers were synthesized by hydroboration reaction and pyrolyzed under continuous nitrogen flow to obtain boron containing silicon oxycarbide (SiBOC) ceramics. The preceramic SiBOC polymers were synthesized with different cyclicsiloxane/borane molar ratios. Structure of the SiBOC p...
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| Format: | Article |
| Language: | English |
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University of Chemistry and Technology, Prague
2015-12-01
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| Series: | Ceramics-Silikáty |
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| Online Access: |
http://www.ceramics-silikaty.cz/2015/pdf/2015_04_341.pdf
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| _version_ | 1818314450099240960 |
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| author | Birsen S. Oksal Aysegul Gencer |
| author_facet | Birsen S. Oksal Aysegul Gencer |
| author_sort | Birsen S. Oksal |
| collection | DOAJ |
| description | Novel preceramic polymers were synthesized by hydroboration reaction and pyrolyzed under continuous nitrogen flow to
obtain boron containing silicon oxycarbide (SiBOC) ceramics. The preceramic SiBOC polymers were synthesized with
different cyclicsiloxane/borane molar ratios. Structure of the SiBOC polymers and transformation of them to the SiBOC
ceramics investigated by Fourier Transform Infrared spectroscopy (FT-IR), Thermogravimetric analysis (TGA), X-ray
Diffraction (XRD) technique and Scanning Electron microscope (SEM). Since the cyclicsiloxanes used in smaller sizes
according to literature, variations were observed in structure of obtained polymers and ceramics. During the pyrolysis of
polymers, loss of the carbon was little. The transformation from amorphous form to the β-SiC crystal was achieved above
1200oC and consequently thermally stable SiBOC ceramics were obtained at higher temperatures. Antibacterial activity of
SiBOC polymers were evaluated by disc diffusion method against E. coli ATCC 25922- for the first time. The new polymers
inhibited the growth of Gram-negative bacteria well enough. |
| first_indexed | 2024-12-13T08:49:50Z |
| format | Article |
| id | doaj.art-e88674c9d9d0403c9ada12558cc0fc92 |
| institution | Directory Open Access Journal |
| issn | 0862-5468 1804-5847 |
| language | English |
| last_indexed | 2024-12-13T08:49:50Z |
| publishDate | 2015-12-01 |
| publisher | University of Chemistry and Technology, Prague |
| record_format | Article |
| series | Ceramics-Silikáty |
| spelling | doaj.art-e88674c9d9d0403c9ada12558cc0fc922022-12-21T23:53:24ZengUniversity of Chemistry and Technology, PragueCeramics-Silikáty0862-54681804-58472015-12-01594341347.20160310191558HYDROBORATION SYNTHESIS, CHARACTERIZATION AND BIOLOGICAL ACTIVITY OF NOVEL CYCLIC PRECERAMIC POLYMERS: TRANSITION TO SiBOC CERAMICSBirsen S. Oksal0Aysegul Gencer Department of Chemistry, Giresun University, Giresun, Turkey Novel preceramic polymers were synthesized by hydroboration reaction and pyrolyzed under continuous nitrogen flow to obtain boron containing silicon oxycarbide (SiBOC) ceramics. The preceramic SiBOC polymers were synthesized with different cyclicsiloxane/borane molar ratios. Structure of the SiBOC polymers and transformation of them to the SiBOC ceramics investigated by Fourier Transform Infrared spectroscopy (FT-IR), Thermogravimetric analysis (TGA), X-ray Diffraction (XRD) technique and Scanning Electron microscope (SEM). Since the cyclicsiloxanes used in smaller sizes according to literature, variations were observed in structure of obtained polymers and ceramics. During the pyrolysis of polymers, loss of the carbon was little. The transformation from amorphous form to the β-SiC crystal was achieved above 1200oC and consequently thermally stable SiBOC ceramics were obtained at higher temperatures. Antibacterial activity of SiBOC polymers were evaluated by disc diffusion method against E. coli ATCC 25922- for the first time. The new polymers inhibited the growth of Gram-negative bacteria well enough. http://www.ceramics-silikaty.cz/2015/pdf/2015_04_341.pdf Silicon boron oxycarbide (SiBOC) polymers SiBOC ceramics Hydroboration reaction Preceramic polymers Antibacterial activity |
| spellingShingle | Birsen S. Oksal Aysegul Gencer HYDROBORATION SYNTHESIS, CHARACTERIZATION AND BIOLOGICAL ACTIVITY OF NOVEL CYCLIC PRECERAMIC POLYMERS: TRANSITION TO SiBOC CERAMICS Ceramics-Silikáty Silicon boron oxycarbide (SiBOC) polymers SiBOC ceramics Hydroboration reaction Preceramic polymers Antibacterial activity |
| title | HYDROBORATION SYNTHESIS, CHARACTERIZATION AND BIOLOGICAL ACTIVITY OF NOVEL CYCLIC PRECERAMIC POLYMERS: TRANSITION TO SiBOC CERAMICS |
| title_full | HYDROBORATION SYNTHESIS, CHARACTERIZATION AND BIOLOGICAL ACTIVITY OF NOVEL CYCLIC PRECERAMIC POLYMERS: TRANSITION TO SiBOC CERAMICS |
| title_fullStr | HYDROBORATION SYNTHESIS, CHARACTERIZATION AND BIOLOGICAL ACTIVITY OF NOVEL CYCLIC PRECERAMIC POLYMERS: TRANSITION TO SiBOC CERAMICS |
| title_full_unstemmed | HYDROBORATION SYNTHESIS, CHARACTERIZATION AND BIOLOGICAL ACTIVITY OF NOVEL CYCLIC PRECERAMIC POLYMERS: TRANSITION TO SiBOC CERAMICS |
| title_short | HYDROBORATION SYNTHESIS, CHARACTERIZATION AND BIOLOGICAL ACTIVITY OF NOVEL CYCLIC PRECERAMIC POLYMERS: TRANSITION TO SiBOC CERAMICS |
| title_sort | hydroboration synthesis characterization and biological activity of novel cyclic preceramic polymers transition to siboc ceramics |
| topic | Silicon boron oxycarbide (SiBOC) polymers SiBOC ceramics Hydroboration reaction Preceramic polymers Antibacterial activity |
| url |
http://www.ceramics-silikaty.cz/2015/pdf/2015_04_341.pdf
|
| work_keys_str_mv | AT birsensoksal hydroborationsynthesischaracterizationandbiologicalactivityofnovelcyclicpreceramicpolymerstransitiontosibocceramics AT aysegulgencer hydroborationsynthesischaracterizationandbiologicalactivityofnovelcyclicpreceramicpolymerstransitiontosibocceramics |