Fabrication of the carbon paper by wet-laying of ozone-treated carbon fibers with hydrophilic functional groups

Kim, Hyunuk; Lee, Young-Ju; Lee, Dong Chul; Park, Gu-Gon; Yoo, Yoonjong

doi:10.1016/j.carbon.2013.04.057

Cited by 30 publications

(14 citation statements)

References 30 publications

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“…C-O, C=O and O-C=O functional groups, on graphitic carbon. 32 However, small chemical shifts between carboxyl, hydroxyl, and ether groups on carbon [41][42][43][44] resulted in a single C-O peak for all three surface functional groups. Likewise, C=O peaks included carboxyls, aldehydes, carbonyls, esters, and ketones, which have similar central binding energies [41][42][43][44] and therefore cannot be differentiated by XPS.…”

Section: Resultsmentioning

confidence: 99%

“…Ozone treatment also oxidizes carbon surfaces for improved hydrophilicity. 31,32 An additional disadvantage is that plasma and ozone generators require large capital expense, especially for large area substrates. Thermal oxidation by a treatment that took more than 16 hours also increased hydrophilicity, 33 but that lasted only for 2 days when we followed the described procedure; significant damage to the carbon fibers was also observed (Fig.…”

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confidence: 99%

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Selective hydroxylation of carbon surfaces for long-lasting hydrophilicity by a green chemistry process

Wilsey

Watson

Fasusi

et al. 2022

Preprint

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We report the selective hydroxylation of carbon surfaces that rendered initially hydrophobic carbon fiber paper hydrophilic for more than five months. This long time of sustained hydrophilicity is unprecedented. Carbon fiber paper is an inexpensive, electrically conductive, high surface area material that is additionally nontoxic, biocompatible, robust, and scalable. But its hydrophobicity prevents widespread use in aqueous applications. Inhibition of overoxidation of carbon beyond hydroxylation is especially challenging because the first oxidation step is thermodynamically most difficult and subsequent oxidations are much easier. We achieved selectivity for less oxidized hydroxyls over carboxyls by an environmentally friendly, solution-processable, acid-free carbon surface functionalization treatment that is rapid, amenable to large scale applications, and did not damage carbon fibers and their network architectures. The development of this mild, green chemistry carbon surface treatment that provides selectivity for surface hydroxyls transforms the utility of carbon materials.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Selective hydroxylation of carbon surfaces for long-lasting hydrophilicity by a green chemistry process

Wilsey

Watson

Fasusi

et al. 2022

Preprint

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“…papers, wet napkin, nonwovens, etc. [7][8][9][10]. Among them, papers are mostly widely used owing to their good degradability and high water absorption property [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Environmentally friendly and breathable wet-laid hydroentangled nonwovens for personal hygiene care with excellent water absorbency and flushability

et al. 2018

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Developing wet-laid papers with a good wet strength remains a longstanding challenge in the papermaking industry. In this study, hydroentanglement, a mechanical bonding technique is developed to consolidate the wet-laid fibre web. The results indicate that wet tensile strength, ductile stretching property, softness, air permeability and water absorbency of the wet-laid fibre web are significantly improved by hydroentanglement. In addition, the abrasion test shows that the dusting off rate of wet-laid fibre web can be effectively reduced through hydroentanglement. Moreover, the disintegration experiment proves that wet-laid hydroentangled nonwovens could be easily dispersed when compared with conventional carded hydroentangled nonwovens. Therefore, the new wet-laid hydroentangled nonwovens can maintain excellent performance in a wet state, showing a great potential for personal hygiene applications.

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“…Advantages offered by the use of cellulose in such hybrid materials can be noted as cellulose being a cheap, easy to access, and eco-friendly material, which can play the role of binder/electrolyte medium within a composite electrode structure especially in PEM fuel cells. , However, the major drawbacks of cellulose being hydrophilic and hard to process and having an electrically insulating nature-based material has driven the research trend to be focused on the preparation of hybrid composite layers via the addition of other carbon-based components such as graphene nanosheets and carbon fibers. , Each of the mentioned additives reportedly improved different properties of the finally obtained electrode structure. For instance, carbon fiber addition was shown to improve both electrochemical activity and electrical properties of the material, the use of graphene played a major role in reducing the electrical contact resistance as well as hydrophobicity improvement, each of which has a noticeable impact on the performance of the product in clean energy application, particularly while being used in fuel cell operations. − …”

Section: Introductionmentioning

confidence: 99%

Green Composite Papers via Use of Natural Binders and Graphene for PEM Fuel Cell Electrodes

Ghobadi

Şanlı

Bakhtiari

et al. 2017

ACS Sustainable Chem. Eng.

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Herein a new fabrication method is suggested via a paper molding process for the preparation of graphene/cellulose/carbon fiber composite paper to be used as the flexible electrode layers mainly for PEM fuel cells. As a green and eco-friendly process, composite papers were prepared at ease with no pollutant by product formation by using ionic liquids (IL). At first, carbon fibers bound via cellulose fiber to form a cellulose/carbon fiber composite paper by wet-laying. Then, electrical conductivity as well as hydrophobicity of the composite papers were improved by extraction of cellulose via an ionic liquid-assisted phase inversion method and then graphene inserted into the structure of ionic liquid treated composite paper by spray coating. Moreover, by spray coating of 0.5 mg cm–2 platinum (Pt) catalyst to the mentioned composite papers, significant improvement in their fuel cell performances were achieved at low relative humidity (RH) fuel cell operation conditions (RH < 50%) which increases the overall system efficiency. The highest power density was recorded at 50% RH as 911 mW cm–2, which was over 20% higher than the 100% RH operating conditions.

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Fabrication of the carbon paper by wet-laying of ozone-treated carbon fibers with hydrophilic functional groups

Cited by 30 publications

References 30 publications

Selective hydroxylation of carbon surfaces for long-lasting hydrophilicity by a green chemistry process

Selective hydroxylation of carbon surfaces for long-lasting hydrophilicity by a green chemistry process

Environmentally friendly and breathable wet-laid hydroentangled nonwovens for personal hygiene care with excellent water absorbency and flushability

Green Composite Papers via Use of Natural Binders and Graphene for PEM Fuel Cell Electrodes

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