Activated Carbon Fiber and Fabric Achieved by Pyrolysis and Activation of Phenolic Precursors

Arons, Gilbert N.; Macnair, Richard N.

doi:10.1177/004051757204200110

Cited by 33 publications

(6 citation statements)

References 2 publications

(2 reference statements)

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“…The selection of raw material is essential in generating high‐quality ACFs. Polyacrylonitrile (PAN),8 coal and petroleum‐based pitches,9 cellulose,10 and phenolic resin11 have been used as raw precursor fiber materials from various candidates. ACFs are characterized by large internal surface areas and high degrees of porosity.…”

Section: Introductionmentioning

confidence: 99%

Preparation of ultra‐thin PAN‐based activated carbon fibers with physical activation

Lin

2008

J of Applied Polymer Sci

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This study elucidates the stabilization and activation in forming activated carbon fibers (ACFs) from ultra-thin polyacrylonitrile (PAN) fibers. The effect of stabilization time on the properties and structure of resultant stabilized fibers was investigated by thermal analysis, X-ray diffraction (XRD), elemental analysis, and scanning electron microscopy (SEM). Stabilization was optimized by the pyrolysis of ultra-thin PAN fibers in air atmosphere at 2808C for 15 min, and subsequent activation in steam at 10008C for 0.75 to 15 min. Resultant ACFs were characterized by N 2 adsorption at 77 K to evaluate pore parameters, XRD to evaluate structure parameters, and field emission scanning electron microscopy (FESEM) to elucidate surface morphology. The produced ACFs had surface areas of 668-1408 m 2 /g and a micropore volume to total pore volume ratio from 78 to 88%. Experimental results demonstrate the surface area and micropore volume of 1408 m 2 /g and 0.687 cm 3 /g, respectively, following activation at 10008C for 10 min.

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Section: Introductionmentioning

confidence: 99%

Preparation of ultra‐thin PAN‐based activated carbon fibers with physical activation

Lin

2008

J of Applied Polymer Sci

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“…32 ' 33 To prepare the ACFs, these precursors are activated at temperatures 1100-1400 K in O 2 , H 2 O, CO 2 , or other oxidizing atmospheres. 34 " 38 In contrast with usual heat treatments, the consequence of this heat treatment is to form more disorder in the material.…”

Section: Introductionmentioning

confidence: 99%

Photoconductivity of activated carbon fibers

Kuriyama

Dresselhaus

1991

J. Mater. Res.

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The conductivity and photoconductivity are measured on a high-surface-area disordered carbon material, i.e., activated carbon fibers, to investigate their electronic properties. This material is a highly disordered carbon derived from a phenolic precursor, having a huge specific surface area of 1000-2000 m 2 /g. Our preliminary thermopower measurements show that the dominant carriers are holes at room temperature. The x-ray diffraction pattern reveals that the microstructure is amorphous-like with L c -10 A. The intrinsic electrical conductivity, on the order of 20 S/cm at room temperature, increases by a factor of several with increasing temperature in the range 30-290 K. In contrast, the photoconductivity in vacuum decreases with increasing temperature. The magnitude of the photoconductive signal was reduced by a factor of ten when the sample was exposed to air. The recombination kinetics changes from a monomolecular process at room temperature to a bimolecular process at low temperatures, indicative of an increase in the photocarrier density at low temperatures. The high density of localized states, which limits the motion of carriers and results in a slow recombination process, is responsible for the observed photoconductivity.

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“…Since the 1970s, many types of synthetic and natural fibers has been used as precursors for fibrous activated carbon like polyacrylonitrile (PAN), 7 polyphenol, viscose rayon, 8,9 cellulose phosphate, phenolic, 10,11 and pitch based fibers. 12,13 Out of them, cellulosic polymer such as cotton, rayon and jute was more than ever focused, for the reason that of their low cost, commercial availability of precursor, high microporosity of prepared activated carbons and biodegradability of precursor.…”

Section: 6mentioning

confidence: 99%

Surface and Adsorption Properties of Activated Carbon Fabric Prepared from Cellulosic Polymer: Mixed Activation Method

Bhati¹,

Mahur²,

Dixit³

et al. 2013

Bulletin of the Korean Chemical Society

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In this study, activated carbon fabric was prepared from a cellulose-based polymer (viscose rayon) via a combination of physical and chemical activation (mixed activation) processes by means of CO 2 as a gasifying agent and surface and adsorption properties were evaluated. Experiments were performed to investigate the consequence of activation temperature (750, 800, 850 and 925 °C), activation time (15, 30, 45 and 60 minutes) and CO 2 flow rate (100, 200, 300 and 400 mL/min) on the surface and adsorption properties of ACF. The nitrogen adsorption isotherm at 77 K was measured and used for the determination of surface area, total pore volume, micropore volume, mesopore volume and pore size distribution using BET, t-plot, DR, BJH and DFT methods, respectively. It was observed that BET surface area and TPV increase with rising activation temperature and time due to the formation of new pores and the alteration of micropores into mesopores. It was also found that activation temperature dominantly affects the surface properties of ACF. The adsorption of iodine and CCl 4 onto ACF was investigated and both were found to correlate with surface area.

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Activated Carbon Fiber and Fabric Achieved by Pyrolysis and Activation of Phenolic Precursors

Cited by 33 publications

References 2 publications

Preparation of ultra‐thin PAN‐based activated carbon fibers with physical activation

Preparation of ultra‐thin PAN‐based activated carbon fibers with physical activation

Photoconductivity of activated carbon fibers

Surface and Adsorption Properties of Activated Carbon Fabric Prepared from Cellulosic Polymer: Mixed Activation Method

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