Simultaneous Electrospinning and Electrospraying for the Preparation of a Precursor Membrane Containing Hydrothermally Generated Biochar Particles to Produce the Value-Added Product of Carbon Nanofibrous Felt

Li, Xianfu; Xu, Tao; Liang, Zhipeng; Amar, Vinod; Huang, Runzhou; Maddipudi, Bharath K.; Shende, Rajesh V.; Fong, Hao

doi:10.3390/polym13050676

Cited by 10 publications

(4 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As mentioned earlier, the formation of beads by electrospraying and fibers via electrospinning depends on several factors, including the dispersion’s molecular weight, conductivity, surface tension, and viscosity. − Although PTFE provides good UV stability and chemical resistance, it exhibits relatively high electrical resistance and dielectric strength. These properties, along with the high surface tension and low viscosity of the PTFE dispersion, favor electrospraying of beads.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Optical Performance Characterization, and Durability of Electrospun PTFE–PEO Materials for Space Applications

Ibekwe,

Wang,

Bolzani

et al. 2024

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Passive heat management is crucial in space, especially for extended missions involving protection from sunlight. Thermal coatings with desirable optical properties can drastically reduce the power consumed by active cooling systems, thereby reserving more resources for other critical systems onboard. Specifically, materials with wavelength-dependent reflectance and emittance are desirable for managing incident sunlight and self-cooling by thermal emission. This study demonstrates the use of polymer nanofibers, specifically poly(tetrafluoroethylene) (PTFE), for passive temperature control in space applications. This study describes the electrospinning fabrication process to create nanofibers and how process parameters can be varied to control the fiber geometry. We combine poly(tetrafluoroethylene) (PTFE) and poly(ethylene oxide) (PEO) polymers to fabricate highly reflective thermal control materials by electrospinning. To understand the role of material and fiber geometry, we measure spectral reflectance, absorptance, and transmittance using spectrophotometers interfaced with integrating spheres. We control the materials’ fiber geometry and solar reflectance by modifying the solution properties, flow rate, rotating collector speed, and fabrication time. With 220–1560 μm thick electrospun nanofiber materials, we demonstrate an average solar reflectance of 94.73–99.75%, with values approaching 99.9% for thicker samples, which is among the highest for space applications. Meanwhile, a thermal emittance of 81.4% was observed at 300 K for a 3360 μm thick sample. The durability of these samples was also tested under ultraviolet light and atomic oxygen. Compared to the state-of-the-art materials, the electrospun PTFE–PEO fibers present a new paradigm for passive thermal management in space applications.

show abstract

Section: Resultsmentioning

confidence: 99%

Synthesis, Optical Performance Characterization, and Durability of Electrospun PTFE–PEO Materials for Space Applications

Ibekwe,

Wang,

Bolzani

et al. 2024

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…Within this literature framework, the presented work aims to investigate the possibility of including biochar as a carbon source in electrospun PolyAcryloNitrile (PAN)based carbon nanofibers. The literature review shows a few attempts to use carbon sources derived from biomass thermochemical conversion in electrospun fiber production: Moulefera et al [11], in their literature review, investigated the preparation of carbon nanofibers from biomass and biopolymers as precursors using electrospinning as the manufacturing method; Velez et al in 2018 used additivated and non-additivated pyrolysis bio-oil in a melt-spinning process [12]; Nan et al in 2017 and Li et al in 2021 both included char from hydrothermal liquefaction in PAN-spun fibers [13,14].…”

Section: Introductionmentioning

confidence: 99%

Preliminary Investigation of Possible Biochar Use as Carbon Source in Polyacrylonitrile Electrospun Fiber Production

et al. 2022

View full text Add to dashboard Cite

Electrospinning with consequent thermal treatment consists in a carbon fiber production method that spins a polymer solution to create fibers with diameters around a few hundred nanometers. The thermal treatments are used for the cyclization and then carbonization of the material at 1700 °C for one hour. The unique structure of micro- and nano-carbon fibers makes them a promising material for various applications ranging from future battery designs to filtration. This work investigated the possibility of using milled gasification biochar, derived from a 20 kW fixed-bed gasifier fueled with vine pruning pellets, as an addictive in the preparation of electrospinning solutions. This study outlined that solvent cleaning and the consequent wet-milling and 32 µm sifting are fundamental passages for biochar preparation. Four different polyacrylonitrile-biochar shares were tested ranging from pure polymer to 50–50% solutions. The resulting fibers were analyzed via scanning electron microscopy, and energy-dispersive X-ray and infrared spectroscopy. Results from the morphological analysis showed that biochar grains dispersed themselves well among the fiber mat in all the proposed shares. All the tested solutions, once carbonized, exceeded 97%wt. of carbon content. At higher carbonization temperatures, the inorganic compounds naturally showing in biochar such as potassium and calcium disappeared, resulting in an almost carbon-pure fiber matrix with biochar grains in between.

show abstract

“…and affordable lab-attainable manufacturing technologies. ,, In this regard, biochar may represent potentially the “gold material”, considering the sustainability, versatility, and effectiveness. Biochar integration onto innovative “supports” represents a new compelling research field in environmental remediation and also in material science, wherein particular biochar nanofibers are used to construct electrospun, electrospun-based polymers, and modified textiles . On the other hand, in the electroanalytical scenario, and in particular, in the sensor field, very few fully biochar-based innovative sensors have been proposed. − This can be attributed to the necessity of additional nanomaterials and conductive substrates to overcome the basic poor electroanalytical features of the produced biochar.…”

Section: Introductionmentioning

confidence: 99%

Water-Phase Exfoliated Biochar Nanofibers from Eucalyptus Scraps for Electrode Modification and Conductive Film Fabrication

Bukhari

Silveri

Pelle

et al. 2021

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

A solvent-free strategy to produce water-dispersed biochar-nanofibers (BH-CNF) is reported, demonstrating the potential of this cost-effective and sustainable material in electrochemical sensing and fabrication of conductive films. Water-phase BH-CNF from eucalyptus scraps were achieved using a Kraft process followed by liquid-phase exfoliation assisted by the biological stabilizing agent sodium cholate. BH-CNF-based sensors were constructed following two strategies: surface modification of screen-printed electrodes and fabrication of exclusively nanofiber-based flexible sensors. The latter were fabricated through a procedure that is cost-effective and within everyone’s reach. The potentiality of the BH-CNF-based sensors has been challenged toward a wide range of analytes containing phenol moieties and applied for detection of o-diphenols and m-phenols in olive oil samples. The BH-CNF-based sensors exhibited repeatable (RSD ≤ 7%, n = 5) and reproducible (RSD ≤ 10%; n = 3) results, proving their applicability in electroanalytical applications and the robustness of the exfoliation and fabrication strategy. For sample analysis, LODs for hydroxytyrosol (LOD ≤ 0.6 μM) and tyrosol (LOD ≤ 3.8 μM), intersensor precision (RSD calibration slope < 7%, n = 3), and recoveries obtained in real sample analysis (91–111%, RSD ≤ 6%; n = 3) endorse the material exploitability in real analytical applications.

show abstract

Simultaneous Electrospinning and Electrospraying for the Preparation of a Precursor Membrane Containing Hydrothermally Generated Biochar Particles to Produce the Value-Added Product of Carbon Nanofibrous Felt

Cited by 10 publications

References 28 publications

Synthesis, Optical Performance Characterization, and Durability of Electrospun PTFE–PEO Materials for Space Applications

Synthesis, Optical Performance Characterization, and Durability of Electrospun PTFE–PEO Materials for Space Applications

Preliminary Investigation of Possible Biochar Use as Carbon Source in Polyacrylonitrile Electrospun Fiber Production

Water-Phase Exfoliated Biochar Nanofibers from Eucalyptus Scraps for Electrode Modification and Conductive Film Fabrication

Contact Info

Product

Resources

About