Thermographic and thermogravimetric analysis of the thermal behaviour of polyacrylonitrile fibres

Goracheva, V. O.; Mikhailova, T. K.; Fedorkina, S. G.; Konnova, N. F.; Azarova, M. T.; Konkin, A. A.

doi:10.1007/bf00542949

Cited by 8 publications

(5 citation statements)

References 3 publications

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“…The heating of the PAN fibers induces chemical reactions, such as cyclization, degradation and thermal cross-linking, and the mechanisms of these processes depend on the heating rate, the medium, the mass of the polymer and the type and nature of filler materials [ 24 ]. The TGA curve of PAN fibers shows four-step weight loss patterns.…”

Section: Resultsmentioning

confidence: 99%

Thermal, Electrical and Surface Hydrophobic Properties of Electrospun Polyacrylonitrile Nanofibers for Structural Health Monitoring

et al. 2015

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This paper presents an idea of using carbonized electrospun Polyacrylonitrile (PAN) fibers as a sensor material in a structural health monitoring (SHM) system. The electrospun PAN fibers are lightweight, less costly and do not interfere with the functioning of infrastructure. This study deals with the fabrication of PAN-based nanofibers via electrospinning followed by stabilization and carbonization in order to remove all non-carbonaceous material and ensure pure carbon fibers as the resulting material. Electrochemical impedance spectroscopy was used to determine the ionic conductivity of PAN fibers. The X-ray diffraction study showed that the repeated peaks near 42° on the activated nanofiber film were α and β phases, respectively, with crystalline forms. Contact angle, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR) were also employed to examine the surface, thermal and chemical properties of the carbonized electrospun PAN fibers. The test results indicated that the carbonized PAN nanofibers have superior physical properties, which may be useful for structural health monitoring (SHM) applications in different industries.

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Section: Resultsmentioning

confidence: 99%

Thermal, Electrical and Surface Hydrophobic Properties of Electrospun Polyacrylonitrile Nanofibers for Structural Health Monitoring

et al. 2015

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“…The weight loss during this degradation steps is attributed to the release of some gases such as H 2 O, CO, CO 2 , CH 4 , NH 3 , and HCN as the products of the chemical reactions which occur during the heat treatment of PAN based on the previous literature 81,82 . The mechanisms of these complex chemical reactions, including cyclization of nitrile groups, degradation, cross‐linking, dehydrogenation, and oxidation reactions, depend on the properties of the additive, heating rate, and atmosphere 58,83,84 …”

Section: Resultsmentioning

confidence: 99%

Synthesis and modification of poly (p‐phenylene terephthalamide) for production of light‐weight hybrid composite armors reinforced with polymer composite nanofiber mats

Güldiken,

Gerçel

2023

Polymer Composites

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Poly (p‐phenylene terephthalamide) (PPTA) polymer was synthesized and then modified to eliminate the processing difficulties arising from its insolubility in organic solvents. The chemical structures of the synthesized PPTA and N‐butyl PPTA (BPPTA) were confirmed by elemental analysis, x‐ray diffraction, Fourier transform infrared (FTIR), and 13C‐NMR spectroscopy studies. As a result of modification, an aramid derivative that is soluble in some common solvents was obtained and added into polyacrylonitrile (PAN) matrix in solution. PAN/BPPTA composite nanofiber mats (CNMs) were fabricated by electrospinning. Mechanical tests showed that tensile strength increased by 119% with 3% BPPTA content. The fabricated CNMs were combined with aramid fabrics to produce laminated hybrid armors and ballistic tests were performed following the NATO Stanag 2920 standard. This is the first report about the integration of CNMs into multilayer armor configurations and resulted in improved ballistic limit velocity (V50) with a relatively very small weight gain and emergence of new energy absorption mechanisms.Highlights Alkylation of the para‐aramid yielded an organo‐soluble aramid derivative. Tensile strength of PAN nanofiber mat increased by 119% with 3% N‐butyl PPTA. Integration of the CNMs resulted in new ballistic impact absorption mechanisms. CNMs contribute to V50 with a very low mass gain due to their high surface area/mass.

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“…Thermogravimetry analysis (TGA) technique used to determine the thermal breakdown and weight loss pattern of PAN fibers as a function of temperature. It also gives the amount of moisture and volatile compound present in the fiber [45].Brunauer-Emmett-Teller (BET) method is used to estimate specific surface area and average pore size. The measurement is based on the physical adsorption of a gas on the sample surface and it can be estimated from nitrogen adsorption isotherms.…”

Section: Surface Characterization and Functionalization Of Carbon Nan...mentioning

confidence: 99%

Electrospun Polyacrylonitrile Carbon Nanofiber for Supercapacitor Application: A Review

Dubal

Chavan

2021

AEF

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The need for the development of renewable energy harvesting and storage devices is on the front as the world is facing an environmental crisis due to the consumption of gallons of fossil fuels. One of the promising solutions on which many researchers are concentrating is supercapacitor as it possesses high energy and power density. Current literature study focusing on developments already had in the field of manufacturing of supercapacitors using different precursors, testing conditions, fiber dimensions, and their performance analysis. Most of the studies found that Polyacrylonitrile (PAN) based electrospun carbon fiber webs is a potential electrode material for supercapacitors. The information gathered in this article is about the electrospinning technique, Surface and electrochemical characterization methods, and recent advances in their performance are highlighted. Also, enhancement in electrochemical performance through optimization of electrospinning parameter, a precursor modification by the addition of active materials (such as carbon nanotubes, metal oxides, and catalysts), heat and surface treatment followed, and optimum fibrous structures are summarized.

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Thermographic and thermogravimetric analysis of the thermal behaviour of polyacrylonitrile fibres

Cited by 8 publications

References 3 publications

Thermal, Electrical and Surface Hydrophobic Properties of Electrospun Polyacrylonitrile Nanofibers for Structural Health Monitoring

Thermal, Electrical and Surface Hydrophobic Properties of Electrospun Polyacrylonitrile Nanofibers for Structural Health Monitoring

Synthesis and modification of poly (p‐phenylene terephthalamide) for production of light‐weight hybrid composite armors reinforced with polymer composite nanofiber mats

Electrospun Polyacrylonitrile Carbon Nanofiber for Supercapacitor Application: A Review

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