Separation of core-shell structured carbon black nanoparticles from waste tires by light pyrolysis

Li, Shuo; Wan, Chaoying; Wang, Shifeng; Zhang, Yong

doi:10.1016/j.compscitech.2016.09.009

Cited by 26 publications

(6 citation statements)

References 39 publications

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“…They also reported a heterogeneous degradation of covalently cross-linked networks of GTR to core–shell CB nanoparticles [ 26 ]. Li et al achieved the separation of CB from GTR by melt-extrusion pyrolysis at 300 °C [ 10 ]. Terminal blend technology can induce devulcanization and degradation of GTR at a high temperature of over 260 °C in asphalt but gives off a huge fume [ 11 ].…”

Section: Tire Rubber and Its Degradation Behaviormentioning

confidence: 99%

“… ( A – C ) SEM micrographs of carbon black obtained from ( A – C ) at different degraded temperatures of 260 °C, 280 °C and 300 °C [ 10 ]; ( D ) TEM micrograph of degraded rubber in the asphalt [ 12 ]. Insert: The enlarged TEM micrograph.…”

Section: Figurementioning

confidence: 99%

“…Devulcanization or degradation destroys the cross-linked network and rubber body carbon chains to be short chains and other separated small substances such as CB. Most previous studies focused on the devulcanization of rubber and the reduced molecular weight of sol fraction ( Table 1 ); less is reported about the decreased size of CB (from several micrometers to micro-nanometers, Figure 1 A–C) with the increase in degradation degree [ 10 , 11 ]. These degraded substances are well dispersed in the asphalt, as shown in Figure 1 D [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

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Characterization, Properties and Mixing Mechanism of Rubber Asphalt Colloid for Sustainable Infrastructure

et al. 2022

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Rubber asphalt has always been considered to have the most potential for the disposal of waste tires as sustainable infrastructure. However, the covalently cross-linked tire rubber presents an extreme challenge in reusing waste rubbers in roads. Rubberized asphalt with finely dispersed or colloidal structure has been regarded as a potential binder used as road material because of the improved properties in terms of storage stability, easy processing and high content of incorporation. However, the mixing mechanism between the finely dispersed rubber on micro-nano scale with asphalt is still not clear, which restricts its further development as value-added material. Devulcanized rubber (DR) was introduced to improve the compatibility between asphalt and rubber. The basic chemicals of DR and asphalt were introduced based on their structures. Furthermore, the interactions between DR and asphalt were discussed according to the functional elements at different levels, and the concept of DR as “the fifth component” of asphalt was put forward. Finally, high performance, environmental and economic effects and applications of devulcanized-rubber-modified asphalt (DRMA) were discussed. The review is expected to provide a guide for the wide application of DRMA, which is still restricted by poor compatibility and bad stability during processing, storage and recycling.

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Section: Tire Rubber and Its Degradation Behaviormentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Characterization, Properties and Mixing Mechanism of Rubber Asphalt Colloid for Sustainable Infrastructure

et al. 2022

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“…Different experimental methods can be applied to analyze the chemical structure and composition of tire recyclates; however, for many practical applications, the surface analysis is necessary because the chemical composition of the surface determines the physicochemical properties of materials, such as adhesion and compatibility with possible species of the future composite. As a surface-sensitive technique, X-ray photoelectron spectroscopy (XPS) allows us to determine the elemental and chemical compositions of the surface, and it is widely applied for the study of materials produced from used tires [ 4 , 7 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 ]. It is well known that tire recyclates contain a mixture of various substances whose compositions should be analyzed before their further use.…”

Section: Introductionmentioning

confidence: 99%

Chemical Composition of Nanoglobular Material on the Surface of Rubber Regenerate Prepared by Explosive Circulation Technology

2022

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The rubber crumbs produced by the explosive circular destruction of worn-out automobile tires were studied. The crumbs showed high hydrophilicity. Their surface was analyzed by X-ray photoelectron spectroscopy. C, O, S, Zn, and Si were detected on the surface, and their chemical states were determined. The same chemical composition in the rubber crumb surface prepared by the explosive grinding of tires, as well as nanoglobules covering the crumb surface, was revealed. The appearance of polar groups on the crumb surface explains its high hydrophilicity and good compatibility with polymer matrices.

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“…Several lab approaches have prepared PCB from waste tires in the literature, TGA pyrolysis, 6 melt-extrusion pyrolysis, 7,8 and bed reactor pyrolysis. 9 Regenerated carbon black was found to have a higher surface area, elongation at break, and heat buildup, but a lower curing speed, modulus, and a comparable state of cure, dispersion, hardness, tensile strength, and tear strength compared with those of the virgin carbon black.…”

Section: Introductionmentioning

confidence: 99%

Effect of pyrolysis carbon black from waste tires on the properties of styrene–butadiene rubber compounds

Lai

Chu

Chiu

et al. 2020

Polymers and Polymer Composites

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Only a few works focus on the use of commercial pyrolysis carbon black (PCB) to replace with commodity carbon black in terms of increasing environmental awareness. In this work, a commercial PCB (ET (Enrestec) black) from waste tires was compared with N660 carbon black in styrene–butadiene rubber (SBR) compounds using standard American Society for Testing and Materials recipes. Particle aggregate size, composition, and surface functionality of ET black and N660 were analyzed through light scattering, energy-dispersive X-ray spectroscopy (EDS), and Fourier transform infrared spectroscopy, respectively. Higher compound viscosity and aggregation power for ET black filler in the rubber matrix was observed. A progressive decrement of approximately 20% in M300 from 15.2 MPa for N660-filled SBR to 12.4 MPa for ET black-filled SBR with increasing ET black ratio in the fillers was clearly observed. ET black could potentially replace 20% in N660 without much influence for SBR compounds in terms of tensile strength. The effect of ET black content on the tear strength was less marginal than the tensile strength. However, with increasing the ET black content, the abrasion resistance index progressively decreased. Thus, it was quite beneficial to consider the merit of PCB in terms of the applications required for tearing resistance. This paves the way for the opportunities to expand further commercial application of PCB from waste tires in the light of environmental awareness.

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Separation of core-shell structured carbon black nanoparticles from waste tires by light pyrolysis

Cited by 26 publications

References 39 publications

Characterization, Properties and Mixing Mechanism of Rubber Asphalt Colloid for Sustainable Infrastructure

Characterization, Properties and Mixing Mechanism of Rubber Asphalt Colloid for Sustainable Infrastructure

Chemical Composition of Nanoglobular Material on the Surface of Rubber Regenerate Prepared by Explosive Circulation Technology

Effect of pyrolysis carbon black from waste tires on the properties of styrene–butadiene rubber compounds

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