Fabrication of Networked Carbon Nanofiber Mats, and Analysis of Their Thermal Properties

2013 ◽  
Vol 50 (4) ◽  
pp. 232-240
Author(s):  
Jina Kim ◽  
Won-Jin Na ◽  
Woong-Ryeol Yu
Keyword(s):  
Thermal Properties ◽  
Carbon Nanofiber ◽  
Nanofiber Mats

Effect of Fiber Diameter on Thermal Conductivity of the Electrospun Carbon Nanofiber Mats

2011 ◽  
Vol 332-334 ◽  
pp. 672-677 ◽  
Author(s):  
Bing Wang ◽  
Ying De Wang
Keyword(s):  
Thermal Properties ◽  
Thermal Management ◽  
Carbon Nanofiber ◽  
Fiber Diameter ◽  
Laser Flash ◽  
Solution Concentration ◽  
Electrospinning Method ◽  
Laser Flash Technique ◽  
Flash Technique ◽  
Nanofiber Mats

Carbon nanofiber for various applications is being actively investigated while the thermal properties of carbon nanofiber mat with different fiber diameters are not well known. In this paper, carbon nanofiber mats with diameter of 220~1000nm were fabricated via electrospinning method. Then the effects of polyacrylnitrile solution concentration, supplied voltage, and spinning distance on fiber diameter were studied. According to the results of thermal properties measurements by laser flash technique, the carbon nanofiber mats possess great potentials in applications for thermal management materials.

Electrospun Nanofibers of Acrylonitrile and Itaconic Acid Copolymers and their Stabilization

2014 ◽  
Vol 6 (2) ◽  
pp. 958-981 ◽  
Author(s):  
Selda Sen Sen
Keyword(s):  
Thermal Properties ◽  
Carbon Nanofiber ◽  
Electrospun Nanofibers ◽  
Mechanical Analysis ◽  
Resonance Spectroscopy ◽  
Gravimetric Analysis ◽  
Stabilization Process ◽  
Air Atmosphere ◽  
Nanofiber Diameter ◽  
Nanofiber Mats

(APS) as an oxidant in the aqueous medium,and nanofibers produced by electrospinning . Electrospun nanofiber mats were by treated heat under air atmosphere to be stabilized. Nanofiber production from AN-IA copolymers and suitability of the nanofiber as carbon nanofiber precursor is discussed. Copolymer are characterized using Fourier Transform Infrared - Attenuated Total Reflectance spectrometer (FTIR-ATR), Nuclear Magnetic Resonance Spectroscopy (1H-NMR), differential scanning calorimeter (DSC), thermal gravimetric analysis (TGA) and dynamic mechanical analysis (DMA). The effect of IA content on the spectroscopic and thermal properties of AN-IA copolymers was investigated. Increasing IA content confirmed by spectroscopic methods seriously affects thermal properties which is important for carbon nanofiber production. IA provides a catalytic effect on stabilization process by decreasing initiation cyclization reaction temperature from 202 to 195 oC. Elecrospinning from the AN-IA copolymer solutions in dimethyl foramide (DMF) was performed, morphology of nanofibers was monitored using Scanning Electron Microscopy (SEM). Bead free nanofibers were produced from AN-IA copolymer solutions under same conditions. Average nanofiber diameter decreases from 878±18 to 376±7 nm according to increasing IA content in copolymers. The nanofiber mats produced were treated at high temperature under air atmosphere for oxidative stabilization. Stabilized nanofibers were characterized using FTIR-ATR spectrometer and a new structure was monitored as a result of cyclization reactions. The stabilized nanofibers were also characterized mophologically using SEM. Volume loss occurring after heat treatment calculated based on the nanofiber diameter changes. Consequently, electrospun nanofibers can be suggested as a carbon nanofiber precursor due to suitability for electrospinning and stabilization process.

Mechanical and thermal properties of polyethylene/carbon nanofiber composites produced by rotational molding

2020 ◽  
Vol 41 (4) ◽  
pp. 1224-1233
Author(s):  
Zenen Zepeda‐Rodríguez ◽  
Martin R. Arellano‐Martínez ◽  
Emilio Cruz‐Barba ◽  
Adalberto Zamudio‐Ojeda ◽  
Denis Rodrigue ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Carbon Nanofiber ◽  
Mechanical And Thermal Properties ◽  
Rotational Molding

Characterization of Polyacrylonitrile Based Carbon Nanofiber Mats via Electron Beam Processing

2012 ◽  
Vol 12 (7) ◽  
pp. 6120-6124 ◽  
Author(s):  
Du-Yeong Kim ◽  
Hye-Kyoung Shin ◽  
Joon-Pyo Jeun ◽  
Hyun-Bin Kim ◽  
Seung-Hwan Oh ◽  
...  
Keyword(s):  
Electron Beam ◽  
Carbon Nanofiber ◽  
Electron Beam Processing ◽  
Nanofiber Mats

Effect of Carbon Nanofiber on Thermal and Tensile Properties of Polypropylene

2006 ◽  
Author(s):  
Yuanxin Zhou ◽  
Mohammad Monirul Hasan ◽  
Shaik Jeelani
Keyword(s):  
Thermal Properties ◽  
Yield Strength ◽  
Strain Rate ◽  
Carbon Nanofiber ◽  
Tensile Modulus ◽  
Tensile Tests ◽  
Strain Rate Range ◽  
Mechanical And Thermal Properties ◽  
Single Filament ◽  
Polypropylene Powder

In the present study, effect of vapor grown carbon nanofiber on the mechanical and thermal properties of polypropylene was investigated. Firstly, nanofibers were dry-mixed with polypropylene powder and extruded into filaments by using a single screw extruder. Then the tensile tests were performed on the single filament at the strain rate range from 0.02/min to 2/min. Experiments results show that both neat and nano-phased polypropylene were strain rate strengthening material. The tensile modulus and yield strength both increased with increasing strain rate. Experimental results also show that infusing nanofiber into polypropylene can increase tensile modulus and yield strength, but decrease the failure strain. At the same time, thermal properties of neat and nano-phased polypropylene were characterized by TGA. TGA results have showed that the nanophased system is more thermally stable. At last, a nonlinear constitutive equation has been developed to describe strain rate sensitive behavior of neat and nano-phased polypropylene.

Using formic acid vapor as reducer to prepare Pt nanoparticles supported on carbon nanofiber mats for methanol electrooxidation

2014 ◽  
Vol 51 ◽  
pp. 86-89 ◽  
Author(s):  
Miaoyu Li ◽  
Gaoyi Han ◽  
Binsheng Yang ◽  
Yunzhen Chang ◽  
Yaoming Xiao ◽  
...  
Keyword(s):  
Formic Acid ◽  
Carbon Nanofiber ◽  
Pt Nanoparticles ◽  
Methanol Electrooxidation ◽  
Acid Vapor ◽  
Nanofiber Mats

Morphological characterization of electrospun carbon nanofiber mats of polyacrylonitrile containing heteropolyacids

2009 ◽  
Vol 159 (14) ◽  
pp. 1496-1504 ◽  
Author(s):  
S.K. Nataraj ◽  
B.H. Kim ◽  
J.H. Yun ◽  
D.H. Lee ◽  
T.M. Aminabhavi ◽  
...  
Keyword(s):  
Carbon Nanofiber ◽  
Morphological Characterization ◽  
Nanofiber Mats

scholarly journals Magnetic Carbon Nanofiber Mats for Prospective Single Photon Avalanche Diode (SPAD) Sensing Applications

Sensors ◽  
2021 ◽  
Vol 21 (23) ◽  
pp. 7873
Author(s):  
Marah Trabelsi ◽  
Al Mamun ◽  
Michaela Klöcker ◽  
Imane Moulefera ◽  
Anton Pljonkin ◽  
...  
Keyword(s):  
Electromagnetic Interference ◽  
Carbon Nanofiber ◽  
Single Photon ◽  
Cost Effective ◽  
Morphological Properties ◽  
Avalanche Diode ◽  
Sensing Applications ◽  
Magnetic Nanofibers ◽  
Application Fields ◽  
Nanofiber Mats

Electrospinning enables simple and cost-effective production of magnetic nanofibers by adding nanoparticles to a polymer solution. In order to increase the electrical conductivity of such nanofibers, the carbonization process is crucial. In this study, the chemical and morphological properties of magnetic nanofiber mats prepared from polyacrylonitrile (PAN)/magnetite were investigated. In our previous studies, PAN/magnetite nanofiber mats were carbonized at 500 °C, 600 °C, and 800 °C. Here, PAN/magnetite nanofiber mats were carbonized at 1000 °C. The surface morphology of these PAN/magnetite nanofiber mats is not significantly different from nanofiber mats thermally treated at 800 °C and have remained relatively flexible at 1000 °C, which can be advantageous for various application fields. The addition of nanoparticles increased the average fiber diameter compared to pure PAN nanofiber mats and improved the dimensional stability during thermal processes. The high conductivity, the high magnetization properties, as well as shielding against electromagnetic interference of such carbonized nanofibers can be proposed for use in single photon avalanche diode (SPAD), where these properties are advantageous.

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