A facile green and cost-effective manufacturing process from coal gangue-reinforced composites

Li, Chao; Liao, Hong; Gao, Hongyu; Zhang, Huirong; Cheng, Fangqin

doi:10.1016/j.compscitech.2023.109908

Cited by 13 publications

(5 citation statements)

References 37 publications

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“…Compared to composite fabricated using pure polyethylene (PE), when the amount of C reached 80%, the composite's hardness and density increased by 23.6% and 26.9%, respectively. Furthermore, the density of the C/PE composite proved notably inferior to that of conventional materials such as mineral‐based composite (1.9–2.0 g cm −3 ), 1 while its hardness surpassed the established GB/T 24137‐2009 (55.0 HD) of Chinese standard. These outcomes aptly illustrate the composite's distinct advantages in density and hardness.…”

Section: Resultsmentioning

confidence: 86%

“…These molds underwent hot pressing within a machine set at 4 MPa pressure, 170°C temperature, and pressed for 45 min to achieve the desired CX%/PE composite. Subsequently, following cooling, the samples were demolded and further prepared into standardized sizes for subsequent property assessments 1 …”

Section: Methodsmentioning

confidence: 99%

“…Subsequently, following cooling, the samples were demolded and further prepared into standardized sizes for subsequent property assessments. 1…”

Section: Fabrication Of the Compositementioning

confidence: 99%

“…Combining coal gangue (CG), a byproduct of coal mining, with polyethylene to form a composite material holds significant promise for various applications. 1,2 However, the multifaceted nature of CG poses a challenge in achieving optimal compatibility between CG particles and the polyethylene (PE) matrix. 3,4 This interface plays a crucial role in determining the mechanical properties and overall stability of the composite material.…”

Section: Introductionmentioning

confidence: 99%

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Effect of fixed carbon on the interfacial compatibility of coal gangue/polyethylene composites was investigated using anthracite as a model compound

Li,

Liao,

Gao

et al. 2024

Polymer Composites

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Coal gangue (CG), a byproduct of coal mining, integrated with polyethylene (PE) offers potential in diverse applications. However, ensuring compatibility between CG and PE remains a challenge due to CG's complex nature. This study explores the influence of fixed carbon, represented by high‐carbon‐content anthracite, on the interface of CG/PE composites. Comprehensive investigations were conducted on physical, mechanical, thermal, microstructural, and chemical aspects. Results revealed that increasing carbon content positively impacted density and hardness while enhancing bending strength and modulus, albeit at a cost of reduced tensile strength. When the C content reached 80%, the hardness and density increased from 50.5 HD and 0.93 g cm−3 to 62.4 HD and 1.18 g cm−3, which were 23.6% and 26.9% higher, respectively. Meanwhile, the bending strength and bending modulus reached 17.2 and 1582.4 MPa, which were 53.6% and 239.1% higher than those of the composites prepared from pure PE (11.2 and 466.7 MPa), respectively. However, the tensile strength decreased by 48.7% from 11.7 to 6.0 MPa. Moderate carbon content positively affected thermal stability, yet higher concentrations posed stability challenges. Microstructural analyses unveiled varied interfacial morphologies, shedding light on carbon's role in enhancing material rigidity and hardness. Surface chemical studies suggested physical entanglement between carbon and PE. Additionally, varying carbon content influenced crystallization, elevating crystallinity and impacting mechanical properties. The findings underscore carbon's potential in reinforcing composite materials. This research provides insights into optimizing CG/PE composites and addressing CG treatment challenges.Highlights Unveiled relationships between fixed carbon and properties in composites. The structure was studied qualitatively and quantitatively by XRD. The anthracite‐C substitution in composite preparation was unraveled.

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Section: Resultsmentioning

confidence: 86%

Section: Methodsmentioning

confidence: 99%

“…Subsequently, following cooling, the samples were demolded and further prepared into standardized sizes for subsequent property assessments. 1…”

Section: Fabrication Of the Compositementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of fixed carbon on the interfacial compatibility of coal gangue/polyethylene composites was investigated using anthracite as a model compound

Li,

Liao,

Gao

et al. 2024

Polymer Composites

Self Cite

View full text Add to dashboard Cite

show abstract

“…It was signalized that at high filler content there was an improvement of CG/LLDPE entanglement promoting heterogeneous nucleation with reflection on the crystallization and thermal stability. 36 For the rHDPE-ZrP, we believed that the crystalline arrangement of phosphate acted as a barrier for the rHDPE chains to propagate to the crystallization centers provoking the reduction of X c . For the composites rHDPE-Al(OH) 3 and rHDPE-ZrPOct/Al(OH) 3 , the fillers are better dispersed and distributed into the rHDPE matrix which may have favored the dissemination of heterogeneous nuclei inducing an increase of crystallinity degree.…”

Section: Resultsmentioning

confidence: 99%

Post-consumer high density polyethylene/zirconium phosphate and aluminum hydroxide composites: Assessment of physico-mechanical and flame retardancy properties

Albitres,

Garcia,

Soares

et al. 2024

Journal of Composite Materials

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Regarding environmental preservation, the upcycling of plastics from petroleum source is a consistent alternative. This work intended to investigate melting extruded composites of post-consumer HDPE (rHDPE) filled with pristine zirconium phosphate (ZrP), aluminum hydroxide [Al(OH)3] and aluminum hydroxide modifying-zirconium phosphate [ZrPOct/Al(OH)3]. Physico-mechanical and flame retardancy were assessed. FTIR revealed that rHDPE brought some degree of oxidative degradation probably from its cleaning process and/or processing. By nuclear magnetic resonance at time domain, rHDPE showed three relaxation domains. Fillers induced the lowering of rHDPE relaxation time owing to polymer/filler by hydrogen bonds. Diffraction pattern of rHDPE/Al(OH)3 and rHDPE/ZrPOct/Al(OH)3 indicated better fillers’ dispersion. Fillers changed rHDPE crystallinity degree and thermal stability but rheologic properties were invariable. For all composites, elastic modulus increased (up to 17%) indicating stiffening. Yield strength did not change but stress and strain at break decreased. For the composites, SEM/EDS showed better dispersion and distribution of ZrP and ZrPOct/Al(OH)3 particles. It was assumed that ZrP and ZrPOct/Al(OH)3 greatly increased the flame retardancy. The work corroborates the importance of polymers’ upcycling, and it is in consonance with the objectives of 2030 Agenda released by United Nations.

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Inhibitory effect and mechanism analysis of modified coal gangue powder on the methane–air explosion

Yang,

Li,

et al. 2024

Asia-Pacific J Chem Eng

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The application of industrial solid waste coal gangue (CG) in gas explosion suppression is explored, which opens up a new way for the resource utilization of CG. Two modified CG anti‐explosion agents, first‐grade modified CG (RCG) and second‐grade modified CG (MCG), were prepared by roasting activation and acid–base synergistic excitation. The explosion suppression performance of CG, RCG, and MCG was investigated through a 2.5 L semi‐closed explosion pipe. The experimental results were compared and analyzed, and their pyrolysis characteristics, phase composition, and particle size were analyzed to reveal their explosion suppression mechanism. It was proved that MCG had the best explosion suppression effect. Under the condition of 9.5% methane–air, it was found that the explosion suppression effect was most significant when the powder mass of the three powders was 300, 360, and 360 mg, respectively. The peak explosion overpressure is reduced by 10.51%, 21.96%, and 32.66%, respectively, and the peak arrival time of flame velocity is extended by .14 times, .20 times, and 1.15 times, respectively. MCG can effectively inhibit methane explosion utilizing physical and chemical synergistic heat absorption, porous structure formation barrier, heat isolation, oxygen dilution, adsorption, and capture of free radicals.

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A facile green and cost-effective manufacturing process from coal gangue-reinforced composites

Cited by 13 publications

References 37 publications

Effect of fixed carbon on the interfacial compatibility of coal gangue/polyethylene composites was investigated using anthracite as a model compound

Effect of fixed carbon on the interfacial compatibility of coal gangue/polyethylene composites was investigated using anthracite as a model compound

Post-consumer high density polyethylene/zirconium phosphate and aluminum hydroxide composites: Assessment of physico-mechanical and flame retardancy properties

Inhibitory effect and mechanism analysis of modified coal gangue powder on the methane–air explosion

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