The impact of eco-friendly chemical incorporation on the thermal oxidation process of flax fiber prior to carbonization and activation

Rahman, Md. Mahbubor; Karacan, İsmail

doi:10.1007/s10853-021-06686-4

Cited by 2 publications

(3 citation statements)

References 55 publications

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“…The untreated PAN and thermally stabilized samples were tested in the 2θ range between 5° and 40°. [ 62,63 ]…”

Section: Methodsmentioning

confidence: 99%

“…The untreated PAN and thermally stabilized samples were tested in the 2θ range between 5 and 40 . [62,63] For the thermally stabilized samples, the X-ray conversion index [66] was calculated using Equation ( 3), where I o is the (100) reflection intensity at 2θ = 17 of the untreated PAN, and I is the (100) reflection intensity at 2θ = 17 of thermally stabilized samples.…”

Section: X-ray Diffractionmentioning

confidence: 99%

“…The test results were presented as the average of 20 measurements. [62,63] 2.1.5 | Differential scanning calorimetry DSC experimental results were obtained from a Seiko DSC-6200 EXSTAR machine. The sample weight was approximately 5 mg, the heating rate was 10 C min À1 , and the nitrogen gas flow rate was determined as 50 ml min À1 .…”

Section: Mechanical Propertiesmentioning

confidence: 99%

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The impact of guanidine carbonate incorporation on the molecular structure of polyacrylonitrile precursor fiber stabilized by a multistep heat treatment strategy

Tunçel

Rahman

Demirel

et al. 2022

Polymer Engineering & Sci

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Thermal‐oxidative stabilization of the polyacrylonitrile (PAN) precursor was performed employing a multi‐step heat treatment strategy in an air circulating furnace. In this approach, the applied temperature was gradually increased from 200°C to 250°C employing several stages for different stabilization durations. Fifteen percent guanidine carbonate (GC) was found as optimum to incorporate with the PAN precursor fibers to accelerate the thermal‐oxidative stabilization process. Characterization techniques, including X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FT‐IR), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), tensile strength, volume density, linear density, fiber thickness, and burning test have been performed to monitor the changes in PAN structure. Test results of the stabilized samples were compared with the reference sample results to demonstrate the accelerating effect of GC integration. Findings showed that GC pretreatment enhanced and accelerated the cyclization of nitrile groups in the PAN polymer structure and allowed the quicker formation of a thermally stable structure. The analysis of the experimental results revealed that GC integration and employing the multi‐step heat treatment strategy helps greatly to cut the overall PAN‐based carbon fiber production cost.

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“…The untreated PAN and thermally stabilized samples were tested in the 2θ range between 5° and 40°. [ 62,63 ]…”

Section: Methodsmentioning

confidence: 99%