Preceramic polymer-derived sioc fibers by electrospinning pdf

We demonstrate the synthesis and electrochemical performance of polymerderived silicon oxycarbidecarbon nanotube sioc cnt composites as a stable lithium intercalation material for secondary battery applications. Stable and efficient liion battery anodes prepared from. Additive manufacturing of ceramics from preceramic. Different classes of preceramic polymers are briefly introduced and their conversion into ceramic materials with adjustable phase compositions and microstructures is presented. Ceramics resulting from the pyrolysis of preceramic polymers are known as polymer derived ceramics, or pdcs polymer. Properties of polymerderived boron nitride fibers yingde wang, yongpeng lei, yongcai song, national university of defence technology, china 8. Preceramic polymerderived sioc fibers by electrospinning core. Suspension and solutionbased freeze casting for porous ceramics volume 32 issue 17 maninpat naviroj, peter w. Hierarchically structured polymerderived ceramic fibers. Although it is hard to produce nanosized fibers from the melt electrospinning process, this process does not require using toxic solvents such as. Synthesis of novel cobaltcontaining polysilazane nanofibers. Preceramic polymer derived sioc fibers by electrospinning. Polymer derived ceramics route toward sicn and sibcn fibers.

Here the authors describe an empirical relationship between polymer. The direct polymertoceramic processing route makes the materials very suitable for the fabrication of complex shaped components and devices through hybrid processingshaping technologies. Composite synthesis was achieved through controlled thermal decomposition of 1,3,5,7tetramethyl 1,3,5,7tetravinyl. Whether youve loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them. Novel precursorderived mesomacroporous tio2sioc nanocomposites with highly stable anatase. Fabrication of pd sioc nanofiber with excellent mechanical property nan wu1, yingde wang2 and frank ko3 1 science and technology on advanced ceramic fibers and composites laboratory, national university of defense technology, changsha, china. Polymer derived ceramics pdcs represent a unique class of hightemperature stable materials synthesized directly by the thermal decomposition of polymers.

Continuous solgel derived sioc hfo 2 fibers with high strength. Corresponding authoremail protected open cell polymer derived ceramic pdc foams with high amount of porosity were fabricated from preceramic polymers by varying the parameters such as the type and the ratio of the polymeric precursor and blowing agent, pyrolysis temperature and atmosphere, and catalyst type. The tensile strength and the permeability of the fiber mats were also. Preceramic polymerderived sioc fibers by electrospinning. Cdcs have also been derived from polymerderived ceramics such as sioc or tic, and. The effects of electro spun process parameters such as the. Mechanical size effects of amorphous polymerderived ceramics at.

Properties of polymer derived boron nitride fibers yingde wang, yongpeng lei, yongcai song, national university of defence technology, china 8. Preparation and mechanical properties of silicon oxycarbide fibers from electrospinningsolgel process article in materials research bulletin 4612. Polycarbosilane pcs solution was used to form pcs fibers by electrospinning and curing them by thermal process. Modeling of fiber spinning flows of preceramics polymer melts 221 polymer fibers were prepared using a labscale melt spinning apparatus.

A piece of aluminum foil is used to collect the fibers, and the distance to the nozzle was 10 cm. Preparation and mechanical properties of silicon oxycarbide fibers from electrospinningsolgel process. Recently, the use of electrospinning in conjunction with different preceramic polymers, such as polysiloxanes, polysilazanes, polycarbosilane, or polyborazine, has been reported, illustrating the production of sioc,19, 20 sicno, 21 sic, 22 c, 23 and bn fibers. Sicn and sibcn networks using melt spinning and electrospinning processes of preceramic polymers. Journal of applied polymer science 2014, 1 3, nana. The use of preceramic polymers in ceramic processing dates back to the 1960s, when verbeek and yajima et al.

Fabrication and properties of lightweight sioc fiber based. A versatile stereolithographic approach assisted by thiolene click chemistry. The sem images of the electrospun fibers indicate an average diameter of polymer derived ceramic nanocomposites pdcncs. Silicon oxycarbide sioc fibers with different chemical compositions were successfully fabricated by electrospinning a mixture of polyvinylpyrrolidone pvp and commercially available polymethylsilsesquioxane mk or polymethylphenylsilsesquioxane h44 preceramic polymers, followed by crosslinking and pyrolysis at c in argon. These superhydrophobic mats possess good chemical and thermal stability. Introduction silicon oxy carbide sioc glasses have received great deal of attention due to their enhanced chemical, mechanical and thermal properties compared with pure silica. Preceramic polymers are mainly siliconbased low molecular weight polymers, optional with heteroelements. The needle inner diameters used for spinning were 0. Emphasis is set on discussing the intimate relationship between the chemistry and structural architecture of. Eintrage mit organisationseinheit 07 fachbereich chemie. The ultrafine nylon fibers were prepared by electro spinning of nylon6 solution in formic acid in the concentrations ranging from 1228 wt%. Ceramic matrix composites and fiber reinforced ceramic matrix composite components of brake systems and other friction tolerant composite articles of this invention are made by providing a fiber preform, coating the fibers with an interface layer of carbon or ceramic, infiltrating the coated fiber preform with a composition comprising a liquid ceramic forming polymer including friction. The vienna young scientists symposium vss is a platform, which aims at bringing highly talented individuals and promising projects together, thus demonstrating our students enthusiasm both for broadening their own scientific horizons and for thinking outside the box, as well as their internalized interdisciplinary perspective.

Fabrication and properties of lightweight sioc fiberbased. The sico fibers were fabricated by pyrolyzing electrospun 515 puspmma composite fibers. Polymer synthesis, melt electrospinning and polymer toceramic conversion bernard samuel university lyon1 france university of bayreuth germany nano structured sioc low k thin film derived from polyphenylcarbosilane. Hierarchically structured polymerderived ceramic fibers were successfully produced by electrospinning a commercially available preceramic polymer to which a cobaltbased catalyst precursor was. Continuous solgel derived siochfo 2 fibers with high. By decreasing the size of sioc ceramic fibers from 1.

Among these, silicon oxycarbide sioc has shown most promise, especially as electrodes in. Preparation and mechanical properties of silicon oxycarbide fibers from electrospinning solgel process article in materials research bulletin 4612. Mielea new class of boron nitride fibers with tunable properties by combining an electrospinning process and the polymerderived ceramics route nanoscale, 2 2010, pp. The morphology of the electro spun nylon6 fibers were investigated by scanning electron microscope sem and the viscosities are measured with the help of redwood viscometer. Other readers will always be interested in your opinion of the books youve read. Polymerderived nonoxide ceramic fiberspast, present and. Sioc ceramics with ordered porosity by 3dprinting of a. Siboc fibers, solgel method, electrospinning, heart treatment. Polymer derived ceramics, fibers, preceramic polymers, melt spinning.

After drying, the calculated sioc fibers were dispersed into the stabilized slurry with different silica sol contents fig. Polymerderivedceramics pdcs and pdcbased fibers are being studied as potential high capacity electrode materials for electrochemical energy storage applications. Carbidederived carbon cdc, also known as tunable nanoporous carbon, is the common term for carbon materials derived from carbide precursors, such as binary e. Guo a, roso m, modesti m, liu j, colombo p 2014 preceramic polymerderived sioc fibers by electrospinning. In situ carbon thermal reduction method for the production of. The american ceramic society 44th international conference. The cured pcs fibers were then pyrolized under inert atmosphere to obtain silicon oxycarbide sioc fibers. Preceramic polymers are a special class of inorganic polymers that can convert with a high yield into ceramic materials, or polymerderived ceramics pdcs, via hightemperature treatment in inert or oxidative atmospheres. The diffractograms show that pyrolyzed pmps up to 900 c, the sample remains in single amorphous sio x c y phase fig. Polymer derived ceramics i wed am 255d 107 polymer derived ceramics ii wed pm 255d 129 advanced characterization wed am 255c 111 novel synthesis i wed pm 255c 3 novel synthesis ii thu am 255c 151 nanoscale phenomena mon am 255c 53 transformation mechanisms at the atomic scale mon pm 255c 72 prediction and simulation tue am 255c 91 tue pm 254b 95. Therefore, electrospinning was carried out with a voltage of 15 kv and a flow rate of 55. Multifunctional membranes based on spinning technologies.

Smooth and rough sicno ceramic fibers were obtained by the pyrolysis of the green fibers with an 80% yield. Polymerderived ceramics pdcs are a class of multifunctional ceramics synthesized by the thermal decomposition of polymeric precursors. Characterization of porosity, structure, and mechanical. Electrospinning was carried out at 2025 kv using a dc power supply with the. Sic nanofibers by pyrolysis of electrospun preceramic.

Nickel ni nanoparticles with average diameters less than 5 nm were successfully synthesized on nanoporous silicon oxycarbide sico sheath. Processing and thermal characterization of polymer derived sicno and sioc reticulated foams. The fiber diameter measurements are presented in table 3. Paolo colombos research interests include novel processing routes to porous glasses and ceramics currently focusing mainly on additive manufacturing, using different technologies, the development of ceramic components from preceramic polymers and geopolymers, and the vitrification and reuse of hazardous industrial and natural waste. Additive manufacturing techniques for fabricating complex. Phase evolution in zrdoped preceramic polymer derived. Polymerderived ceramics route toward sicn and sibcn fibers. Superhydrophobic mats of ceramic fibers were fabricated via a chemical vapor deposition of perfluorosilane onto the rough fibers. Additive manufacturing of polymerderived ceramics science. Among these, silicon oxycarbide sioc has shown most promise, especially as electrodes in lithium ion batteries lib. Synthesis of nickel nanoparticles supported on nanoporous. Fiber formation occurs at lower temperatures for nozzles with larger exitchannel area. Polymerderived ceramic fibers with aligned multiwalled carbon nanotubes mwcnts are fabricated through the electrospinning of polyaluminasilazane solutions with welldispersed mwcnts followed by pyrolysis.

Polymer derived ceramics pdcs and pdcbased fibers are being studied as potential high capacity electrode materials for electrochemical energy storage applications. Poly3hexylthiophenebpoly poly ethylene glycol methyl ether acrylate p3htbppega, a conjugated block copolymer compatible with. Sic, tic, or ternary carbides, also known as max phases e. By continuing to use this site you agree to our use of cookies. Silicon oxycarbide sioc fibers with different chemical compositions were successfully fabricated by electrospinning a mixture of polyvinylpyrrolidone pvp and commercially available polymethylsilsesquioxane mk or polymethylphenylsilsesquioxane h44 preceramic polymers, followed by cross. In this study, silicon oxycarbide sioc ceramic fiber mats obtained by electrospinning of two different preceramic polymers mk and h44 resin were evaluated in terms of their total porosity and other structural characteristics using three different characterization tools. Polymerderived ceramic composite fibers with aligned. Polymerderived ceramics pdcs strategy shows a great deal of advantages for. Ceramic components have also been produced by hotpressing lamination and sintering of paper sheets infiltrated with a suspension of preceramic polymer and activepassive fillers silicon and sic, respectively. On one hand, preceramic polymers can be processed using almost all the polymer forming techniques including electrospinning. Mechanical and surfacechemical properties of polymer.

The effect of nozzleexitchannel shape on resultant fiber. Request pdf preceramic polymerderived sioc fibers by electrospinning silicon oxycarbide sioc fibers with different chemical compositions were. Organosilicon polymers facilitate the shaping process and different siliconbased ceramics with controllable components can be fabricated by modifying organosilicon polymers or adding fillers. Journal of the ceramic society of japan jstage home. Polymerderived ceramics were discovered in the 1960s. It is worth noting that silicate ceramics can also be. In situ carbon thermal reduction method for the production. Cdcs have also been derived from polymer derived cera. We report here a strategy for the processing of micron and submicron fibers from a cobaltcontaining hyperbranched polysilazane by electrospinning. An alternative approach relies on polymerderived ceramics pdc that. Directionally aligned macroporous sioc via freeze casting of preceramic polymers. Polymer melt were heated up in a heating chamber until an appropriate viscosity was obtained and under the movement from the piston the polymer were extruded. First, the electrospun sioc fabrics after calcined at c were dispatched into fibers using ethanol as the solvent fig.

Preparation and mechanical properties of silicon oxycarbide. Sioc fibers have been successfully fabricated by a combination of electrospinning and solgel process 14,15. Electrospun sioc ceramic fiber mats as freestanding. Jun 18, 2010 nickel ni nanoparticles with average diameters less than 5 nm were successfully synthesized on nanoporous silicon oxycarbide sico sheath. Us20050276961a1 materials and methods for making ceramic. The electrospun nanofibers have uniform average diameters of 600 nm and lengths of 10. Mar 24, 2015 in this study, silicon oxycarbide sioc ceramic fiber mats obtained by electrospinning of two different preceramic polymers mk and h44 resin were evaluated in terms of their total porosity and other structural characteristics using three different characterization tools. Synthesis and morphology optimization of electrospun sibnc. Polymerderived ceramics pdcs strategy shows a great deal of advantages for the fabrication of advanced ceramics. To find out more, see our privacy and cookies policy. Because of fusible character of pmsq at low temperature, the spun fibers were exposed to vapors of various metal chlorides sicl 4, sich 3cl 3, ticl 4, and bcl 3 to promote the fiber curing. Preceramic polymers are currently used to synthesize ceramic.

Ceramic nanocomposites from tailormade preceramic polymers. Emission in the nanostructured materials is important in micronanoelectronic devices. In the second chapter, polymerderived ceramics, the basis of electrospinning. Hierarchically structured polymerderived ceramic fibers by. Carbidederived carbon wikimili, the best wikipedia reader. Hierarchically structured polymerderived ceramic fibers were successfully produced by electrospinning a commercially available preceramic polymer to which a cobaltbased catalyst precursor was added, followed by pyrolysis in nitrogen at temperatures ranging from 1250 to 1400 c. Aug 29, 20 silicon oxycarbide sioc fibers with different chemical compositions were successfully fabricated by electrospinning a mixture of polyvinylpyrrolidone pvp and commercially available polymethylsilsesquioxane mk or polymethylphenylsilsesquioxane h44 preceramic polymers, followed by cross. Preparation and characterization of polymer nano fibres. However, for the undoped samples pyrolyzed at temperature c and above, a. This research first focuses on the fabrication of high temperature stable siliconcarbonitride sicn fibers by electrospinning for ceramic matrix composite cmc applications. Melt spinning and metal chloride vapor curing process on. Jan 24, 2015 guo a, roso m, modesti m, liu j, colombo p 2014 preceramic polymer derived sioc fibers by electrospinning. Dear colleagues, the polymerderived ceramic pdc route is based on the synthesis of preceramic polymers as suitable and highly pure synthetic precursors to supply after pyrolysis ceramics with a desired phase distribution and homogeneity. The tensile strength and the permeability of the fiber mats were also investigated.

Carbide derived carbon cdc, also known as tunable nanoporous carbon, is the common term for carbon materials derived from carbide precursors, such as binary e. Ceramic nanofibers fabricated by electrospinning and their. The fabrication process of fibrous aerogels from the electrospun sioc fibers was illustrated in fig. Study on morphology of electrospun sioc fibers scientific. Ceramic nanofibers fabricated by electrospinning and their applications in catalysis, environmental science, and energy technology. The melt electrospinning process consists of heating up the desired polymer to achieve molten polymer and then extruding the molten polymer and applying a high voltage simultaneously to make fibers. On one hand, preceramic polymers can be processed using almost all the polymerforming techniques including electrospinning. Yao xu a, dong su a, hongjun feng a, xiao yan ab, ning liu a and yong sun a a key laboratory of advanced ceramics and machining technology, ministry of education, school of materials science and engineering, tianjin university, tianjin, 300072, china. Recently, preparation of polymerderived microfibers including sioc.