Carbonization behavior of oxidized viscose rayon fibers in the presence of boric acid–phosphoric acid impregnation

Karacan, İsmail; Gül, Abdullah

doi:10.1007/s10853-014-8451-5

Cited by 20 publications

(15 citation statements)

References 56 publications

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“…The spectra showed two characteristic bands around 1320 and 1583 cm −1 , which are assigned to the so-called D and G bands of carbon, respectively. The D band originates from sp 3 -hybridized carbon atoms, while the G band correlates with the sp 2 -hybridized graphitic phase of the carbon [23,24]. Thus, the ratio of the relative intensities of I D and I G can obtain information on the disorder within the carbon fiber.…”

Section: Resultsmentioning

confidence: 99%

Supercapacitor Electrodes from Viscose-Based Activated Carbon Fibers: Significant Yield and Performance Improvement Using Diammonium Hydrogen Phosphate as Impregnating Agent

Breitenbach

Lumetzberger

Hobisch

et al. 2020

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Viscose fibers were impregnated with different concentrations of diammonium hydrogen phosphate (DAHP), carbonized, activated, and tested as high-performance electrode materials for supercapacitors. The yield of these activated carbon fibers (ACFs) could be increased by a factor of 14 by using DAHP compared to ACF without impregnation. These specific activation procedures yielded a high specific surface area of more than 2700 m2·g−1 with a pore size distribution (PSD) suitable for use as a supercapacitor electrode. The electrode materials were implemented in symmetric supercapacitors using TEMA BF4 as electrolyte and cyclic voltammetry measurements showed high specific capacitances of up to 167 F·g−1. Furthermore, the devices showed high energy densities of up to 21.4 W·h·kg−1 and high-power densities of up to 8.7 kW·kg−1. The supercapacitors featured high capacity retention (96%) after 10,000 cycles. These results show that ACFs made of viscose fibers, previously impregnated with DAHP, can be used as high-performance electrodes in supercapacitors for energy storage applications.

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Section: Resultsmentioning

confidence: 99%

Supercapacitor Electrodes from Viscose-Based Activated Carbon Fibers: Significant Yield and Performance Improvement Using Diammonium Hydrogen Phosphate as Impregnating Agent

Breitenbach

Lumetzberger

Hobisch

et al. 2020

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“…Usually, the mechanical properties of CFs are dependent on the properties of the precursor, spinning technology, carbonization process, and post-treatment conditions, compared to other renewable precursor based carbon fibers (Table 3), including Rayon fibers, 16,17,42,43 Lyocell fibers, 16,17,44,45 Sisal fibers, 46 lignin based fibers, 47−52 and wool fibers. 37,53 CF-900 based on CC fibers exhibits decent tensile strength.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

From Waste Cotton Linter: A Renewable Environment-Friendly Biomass Based Carbon Fibers Preparation

Zhou

Wang

Zhang

et al. 2016

ACS Sustainable Chem. Eng.

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As a high performance fiber material, carbon fibers are practically important in various applications. Traditional methods for the preparation of carbon fibers are based on fossil fuels using poly(acrylonitrile) and mesophase pitch as starting materials. The preparation of carbon fibers based on renewable low cost biomass is an alternative and sustainable approach in green chemistry. Herein, an environmentally friendly low cost approach is established to prepare carbon fibers from waste cotton linter though the CarbaCell method using a wet-spinning technology and carbonization process. Crude cellulose carbamate (CC) fibers and one treated with dibasic ammonium phosphate (DAP) were investigated by TGA and DTG. The prepared carbon fibers were characterized with SEM, IR, and contact angle measurements. Thermal behavior analysis indicated that the carbon yield increased by 133% with the use of DAP as impregnant. The SEM images showed these carbon fibers had a relatively smooth surface and approximately round compact morphology in cross-section. Without hot-stretching and post-thermal treatments steps, the as-prepared carbon fibers carbonizing at 900 °C reach tensile strength around 0.72 GPa with the carbon yield up to 36.4%. This process provide a green approach for the preparation of carbon fibers based on a renewable resource.

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“…Improvement in the properties of the fibres could be achieved by the application of tension during carbonisation, or the use of hot stretching as has been recently demonstrated for rayon precursors [44]. Karacan and Gül [45] however applied tension on their viscose fibres (up to a temperature of 1000 °C), but only achieved a modulus of ~36 GPa. The application of tension is important due to the presence of shrinkage during the carbonisation process, but even without this a tensile strength of ~1.5 GPa has been achieved.…”

Section: Mechanical Deformation Studies Of the Graphitised Fibres Usimentioning

confidence: 99%

Carbon fibres with ordered graphitic-like aggregate structures from a regenerated cellulose fibre precursor

Lewandowska

Soutis

Savage

et al. 2015

Composites Science and Technology

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The production and characterisation of low modulus carbon fibres is reported from a commercially available regenerated cellulose fibre (Cordenka TM). The fibres were heat treated before the graphitisation at a temperature of 200 °C. Fibres were further heat treated and graphitised at a temperature of 2000 °C. Polarised Raman spectra of carbonised/graphitised fibres were recorded. The ratio of two Raman peaks located at ~1350 cm-1 (D-band) and at ~1600 cm-1 (2D band)the ID/IG ratiowere used to follow the onset and development of the carbon/graphitic structure. It is shown that single carbon fibres processed at 2000 °C have a modulus of ~70 GPa and strain at break >2%. A Raman spectroscopic method that follows the shift in the position of the 2D band suggests a modulus of ~100 GPa. Transmission Electron Microscope imaging of the fibres reveals a sub-structure containing aggregates of oriented concentric turbostratic carbon domains, some of which are reminiscent of carbon nanotubes. These relatively high strength fibres (1.5 GPa) are suggested as possible alternatives to E-glass fibres in high volume applications. Furthermore, it is shown that these fibres can be converted in a woven precursor form to a carbon fibre fabric without the need to weave brittle filaments.

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Carbonization behavior of oxidized viscose rayon fibers in the presence of boric acid–phosphoric acid impregnation

Cited by 20 publications

References 56 publications

Supercapacitor Electrodes from Viscose-Based Activated Carbon Fibers: Significant Yield and Performance Improvement Using Diammonium Hydrogen Phosphate as Impregnating Agent

Supercapacitor Electrodes from Viscose-Based Activated Carbon Fibers: Significant Yield and Performance Improvement Using Diammonium Hydrogen Phosphate as Impregnating Agent

From Waste Cotton Linter: A Renewable Environment-Friendly Biomass Based Carbon Fibers Preparation

Carbon fibres with ordered graphitic-like aggregate structures from a regenerated cellulose fibre precursor

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