Preparation of chrome-tanned leather shaving-based hierarchical porous carbon and its capacitance properties

Ma, Fang; Shaolan, Ding; Ren, Huijun; Peng, Piaolin

doi:10.1039/c9ra03139a

Cited by 19 publications

(15 citation statements)

References 61 publications

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“…Leather waste has been used as a filling and stabilizing additive for bituminous and asphalt masses (Stone Matrix Asphalt (SMA)), improving their mechanical parameters, creep resistance, hardness, and humidity [23]. Ma et al [24] developed a mesoporous material by high-temperature carbonization of chrome-tanned leather waste, which was then used for the electrodes in supercapacitors. The material was characterized by a high specific surface, low resistivity, and a high concentration of functional groups containing oxygen and nitrogen atoms.…”

Section: Introductionmentioning

confidence: 99%

Hazardous Waste Management of Buffing Dust Collagen

2020

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Buffing Dust Collagen (BDC) is a hazardous waste product of chromium tanning bovine hides. The aim of this study was to investigate whether BDC has the desirable properties required of modern fillers. The microstructural properties of BDC were characterized by elemental analysis (N, Cr2O3) of dry residue and scanning electron microscopy (SEM). The BDC was applied (5 to 30 parts by weight) to styrene butadiene rubber (SBR), obtaining SBR-BDC composites. The physicochemical properties of the SBR-BDC composites were examined by Fourier transform infrared analysis, SEM, UV–Vis spectroscopy, swelling tests, mechanical tests, thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). The biodegradability of the SBR-BDC composites and their thermo-oxidative aging were also investigated. The filler contributed to increase the cross-link density in the elastomer structure, as evidenced by enhanced mechanical strength. The introduction of a filler into the elastomer structure resulted in an increase in the efficiency of polymer bonding, which was manifested by more favorable rheological and mechanical parameters. It also influenced the formation of stable interfacial bonds between the individual components in the polymer matrix, which in turn reduced the release of compact chromium in the BDC filler. This was shown by the absorption bands for polar groups in the infrared analysis and by imaging of the vulcanization process.

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Section: Introductionmentioning

confidence: 99%

Hazardous Waste Management of Buffing Dust Collagen

2020

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“…Since the main component of the leather is collagen, which is protein, the existence of O and N is expected to be contained in the LDW carbon. [38,39] The element atomic ratio among C, O, and N are 15:3:1. The element Cr, also found in the EDX characterization ( Figure S5, Supporting Information), is ascribed to the leather manufacturing process.…”

Section: Resultsmentioning

confidence: 99%

“…The C 1s peak of the LDW-CL could be fitted into CC (≈284.4 eV), COR (≈285.9 eV), CO (≈287.6 eV), and COOR (≈289.1 eV) peaks, which are assigned to the aliphatic carbon, the hydroxyl and phenolic groups, the ketone and quinone groups, and the carboxyl groups, respectively ( Figure S6b, Supporting Information). [38] The electrical performance of the LDW-CL-based strain sensor was studied. During our study, the LDW-CL prepared at 0.2 W is not well conductive and the one prepared at 0.5 W is fragile, thus the following investigation is performed on the sample based on the LDW-CL prepared at 0.3 W. Figure 3a shows the resistance variation (∆R/R 0 ) of the LDW-CL-based sensors when subjected to tension and compression strains.…”

Section: Resultsmentioning

confidence: 99%

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Maskless Formation of Conductive Carbon Layer on Leather for Highly Sensitive Flexible Strain Sensors

Wang

Chen

Sun

et al. 2020

Adv Elect Materials

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Development of strain sensors on flexible and breathable leather or textile has potential applications in Internet of Things, human–machine interfaces, and motion detection. Nevertheless, the fabrication of strain sensors with high performance on the above substrates in a maskless, scalable, and highly efficient manner is still a challenge. In this study, highly sensitive strain sensors are mask‐freely fabricated on leather by a highly efficient and scalable laser direct writing (LDW) technique in open air without using any additional precursors. The strain sensors are constructed by the carbon flake synthesized by LDW carbonization of collagen fibers in the leather. The LDW carbonized leather‐based device provides maximum sensitivities of ≈2009.5 and ≈50.9 for tension and compression strain detection, respectively. Additionally, the device has a minimum detection strain of 0.005% and a good mechanical stability over 10 000 bending cycles. The high performance of the flexible strain sensors as well as the developed maskless, scalable and highly efficient LDW technique endows the promising applications of the devices in human motion monitoring and external stimuli detection.

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“…Nowadays, HPCs are mainly synthesized via the pyrolysis and activation of carbon precursors including fossil fuels, 12 biomass, 13,14 synthetic polymers materials [15][16][17][18] and some organic wastes. 19 HPCs have been generally prepared by hard/so templating approaches or templating/chemical activation combination methods. [20][21][22][23] These strategies were successful in preparing HPCs with precise nanostructures.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical porous carbon derived from carboxylated coal-tar pitch for electrical double-layer capacitors

Wang

Zhu

et al. 2019

RSC Adv.

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Hierarchical porous carbons have been synthesized using amphiphilic carboxylated coal-tar pitch as a precursor via a simple KOH activation process. Amphiphilic carboxylated coal-tar pitch has a high content of hydrophilic carboxyl groups that enable it to be easily wetted in KOH solution and that facilitate the activation process. In the present study, the effect of the activation agent to precursor ratio on the porosity and the specific surface area was studied by nitrogen adsorption-desorption. A maximum specific surface area of 2669.1 m 2 g À1 was achieved with a KOH to carboxylated pitch ratio of three and this produced a structure with micropores/mesopores. Among the various hierarchical porous carbons, the sample prepared with an activation agent to precursor ratio of two exhibited the best electrochemical performance as an electrode for an electrical double-layer capacitor in a 6 M KOH electrolyte. The specific capacitance of the sample was 286 F g À1 at a current density of 2 A g À1 and it had a capacitance-retention ratio of 93.9%, even after 10 000 cycles. Thus, hierarchical porous carbons derived from amphiphilic-carboxylated coal-tar pitch represent a promising electrode material for electrical double-layer capacitors.

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Preparation of chrome-tanned leather shaving-based hierarchical porous carbon and its capacitance properties

Abstract: A chromium oxide-carbon composite material was formed by the high-temperature carbonization of chromium-tanned leather shavings, followed by the leaching of chrome oxide and activation by KOH.

Cited by 19 publications

References 61 publications

Hazardous Waste Management of Buffing Dust Collagen

Hazardous Waste Management of Buffing Dust Collagen

Maskless Formation of Conductive Carbon Layer on Leather for Highly Sensitive Flexible Strain Sensors

Hierarchical porous carbon derived from carboxylated coal-tar pitch for electrical double-layer capacitors

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