Thermal destruction of luffa sponge under air and nitrogen

Zhang, Yuanhu; Lyu, Shuang-Shuang; Liu, Shuting; Chen, Yunxia; Qin, Wenli; Ye, Ying; Chen, Xuegang

doi:10.1007/s10973-016-5899-3

Cited by 9 publications

(1 citation statement)

References 34 publications

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“…The observed phenomena can be yet another effect of the above-described structural and morphological evolutions of the samples. Previous studies regarded the Lu fibers as highly resistant to applied mechanical forces [ 36 ] and prone to preserve the original tubular structure when treated in nitrogen ambient [ 75 ]. However, the thermal expansion of the samples due to substantial grain growth and pore formation in the ceramic matrix once the Gr amount was increased at 1.00 wt.% ( Figure 5 ) impacted the shrinkage effect to lower extents (as indicated in Figure 6 ), yet impeded the complete transition and attainment of proper pores and channels.…”

Section: Resultsmentioning

confidence: 99%

Fiber-Templated 3D Calcium-Phosphate Scaffolds for Biomedical Applications: The Role of the Thermal Treatment Ambient on Physico-Chemical Properties

et al. 2021

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A successful bone-graft-controlled healing entails the development of novel products with tunable compositional and architectural features and mechanical performances and is, thereby, able to accommodate fast bone in-growth and remodeling. To this effect, graphene nanoplatelets and Luffa-fibers were chosen as mechanical reinforcement phase and sacrificial template, respectively, and incorporated into a hydroxyapatite and brushite matrix derived by marble conversion with the help of a reproducible technology. The bio-products, framed by a one-stage-addition polymer-free fabrication route, were thoroughly physico-chemically investigated (by XRD, FTIR spectroscopy, SEM, and nano-computed tomography analysis, as well as surface energy measurements and mechanical performance assessments) after sintering in air or nitrogen ambient. The experiments exposed that the coupling of a nitrogen ambient with the graphene admixing triggers, in both compact and porous samples, important structural (i.e., decomposition of β-Ca3(PO4)2 into α-Ca3(PO4)2 and α-Ca2P2O7) and morphological modifications. Certain restrictions and benefits were outlined with respect to the spatial porosity and global mechanical features of the derived bone scaffolds. Specifically, in nitrogen ambient, the graphene amount should be set to a maximum 0.25 wt.% in the case of compact products, while for the porous ones, significantly augmented compressive strengths were revealed at all graphene amounts. The sintering ambient or the graphene addition did not interfere with the Luffa ability to generate 3D-channels-arrays at high temperatures. It can be concluded that both Luffa and graphene agents act as adjuvants under nitrogen ambient, and that their incorporation-ratio can be modulated to favorably fit certain foreseeable biomedical applications.

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Section: Resultsmentioning

confidence: 99%

Fiber-Templated 3D Calcium-Phosphate Scaffolds for Biomedical Applications: The Role of the Thermal Treatment Ambient on Physico-Chemical Properties

et al. 2021

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Fungal Potential for the Degradation of Synthetic Dyes: An Overview of Renewable Alternatives for the Production of Lignin-Modifying Enzymes

Fernandes

Vilar

Torres

et al. 2021

Microorganisms for Sustainability

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Luffa cylindrica Slow Pyrolysis and Solar Pyrolysis: Impact of Temperature and Heating Rate on Biochar Properties and Iodine Adsorption Performance

Souza

Rocha

Rezende³

2022

Waste Biomass Valor

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Recently, Luffa cylindrica has been drawing lots of attention in adsorption applications. However, the contaminated biomass needs to be properly disposed. Pyrolysis is a process capable of turning this type of residue into valuable product. Luffa cylindrica pyrolysis produces biochar which has been used as adsorbent for various cationic and organic species. Additionally, the use of solar power to heat the reactor reduces the environmental impact of pyrolysis. In this work, a lab scale solar pyrolizer was built in a 40dollar budget. This biomass was previously submitted to slow pyrolysis in an electrical reactor at various temperatures (300, 400, and 500 °C) and heating rates (2, 10, and 20 °C.min -1 ) to access the in uence of these parameters on biochar properties. Further, the Luffa sponge sample was submitted to solar pyrolysis. The characterization methods of TG/DTG, FTIR, SEM, and HHV analysis were employed to access biochar properties. Biochar adsorption performance was accessed by iodine adsorption experiments. Highest HHV (29,3 MJ.kg -1 ) was obtained for the biochar from the 500 °C, 2 °C.min -1 pyrolysis. Maximum iodine adsorption (162,9 mg.g -1 ) was observed on the biochar produced at 400°C, 2 °C.min -1 . Solar biochar had a 24,3 MJ.kg -1 HHV and a Iodine adsorption of 115.2 mg.g -1 . HighlightsA solar pyrolizer was designed and constructed in a 40-dollar budget; Solar pyrolysis was conducted in temperatures up to 417 °C; Pyrolysis of Luffa cylindrica up to 300, 400 and 500 °C at 2, 10 and 20 °C.min -1 ; Luffa pyrolysis was accessed by TG/DTG, FTIR and MEV; Iodine adsorption and HVV were highly in uenced by pyrolysis parameters. Statement Of NoveltyLuffa cylindrica is a natural ber with effective adsorbent properties. After saturation, adsorbents are a solid waste that must be properly regenerated or disposed. Through pyrolysis, luffa cylindrica was processed into biochar with good adsorptive and calori c properties. The pyrolysis of Luffa cylindrica with emphasis on its biochar was studied in detail yet unseen in literature. Luffa cylindrica solar pyrolysis was effective and the construction and the use of a 40-dollar solar reactor is presented..

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Thermal destruction of luffa sponge under air and nitrogen

Cited by 9 publications

References 34 publications

Fiber-Templated 3D Calcium-Phosphate Scaffolds for Biomedical Applications: The Role of the Thermal Treatment Ambient on Physico-Chemical Properties

Fiber-Templated 3D Calcium-Phosphate Scaffolds for Biomedical Applications: The Role of the Thermal Treatment Ambient on Physico-Chemical Properties

Fungal Potential for the Degradation of Synthetic Dyes: An Overview of Renewable Alternatives for the Production of Lignin-Modifying Enzymes

Luffa cylindrica Slow Pyrolysis and Solar Pyrolysis: Impact of Temperature and Heating Rate on Biochar Properties and Iodine Adsorption Performance

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