Magnetically tunable rheological properties of PVDF doped with superparamagnetic Fe3O4 nanoparticles synthesized by rapid microwave method

Manori, Samta; Singh, Prayas; Yadav, Priya; Kumar, Ashwani; Chandra, Ramesh; Raina, K. K.; Shukla, Ravi K.

doi:10.1016/j.jpcs.2022.111137

Cited by 9 publications

(7 citation statements)

References 46 publications

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“…The investigation of polymer rheology testing delves into the interplay between stress, applied force, deformation, and flow of materials . The storage modulus quantifies the energy required to distort a sample and is a measure of the material’s resistance to deformation . As shown in Figure a, the storage modulus of composite materials exhibits an upward trend with increasing TiO 2 content, which is particularly noticeable in the high-frequency region.…”

Section: Resultsmentioning

confidence: 99%

Near-Infrared Reflective Greenhouse Covering: A Novel Strategy for Electricity-Free Cooling

Zhang,

Chen,

Cao

et al. 2024

ACS Agric. Sci. Technol.

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Traditional cooling strategies for greenhouses commonly result in significant electricity consumption and a substantial release of carbon dioxide emissions. Considering the industrial fabrication process for the greenhouse covering film and the thermal management theory, we developed a composite greenhouse covering film that incorporates titanium dioxide into polyethylene to achieve near-infrared reflection. The film demonstrates an impressive near-infrared reflectance of 54.4% within the wavelength range of 780−2500 nm. A tunnel-type greenhouse demo comparative test results show that the composite film can effectively decrease the average temperature inside the greenhouse by 6.7 °C in comparison to the pure polyethylene film. The reduction implies a significant annual saving in cooling electricity at the national level of 2151912.3 MW h, along with an annual CO 2 emission reduction by 1250261.1 tons.

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Section: Resultsmentioning

confidence: 99%

Near-Infrared Reflective Greenhouse Covering: A Novel Strategy for Electricity-Free Cooling

Zhang,

Chen,

Cao

et al. 2024

ACS Agric. Sci. Technol.

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“…This software is used to investigate various topological properties of nanostructures. [57][58][59][60] The straight tool was used to trace the image scale bar, and the image was calibrated using the Analysis->Set scale function. The sizes for all microneedles (100 microneedles per sample) were selected using the straight tool and were obtained with Analysis->Measure.…”

Section: Resultsmentioning

confidence: 99%

Efficiency Enhancement of Biophotovoltaic Solid‐State Solar Cells

et al. 2023

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Biophotovoltaic solid state solar cells are new friendly environmentally solar cells inspired by photosynthesis phenomena. Photosystem I, a complex protein located in the chloroplast of the plant leaves that has a principal role in light absorption, is the most common light absorber used in biophotovoltaic solid state solar cells. Low efficiency and low current density are the main challenges in this kind of solar cell. In the present study, to vacillate the motion of electrons and holes, we use carbon nanotubes and tyrosine as transfer layers and to increase light absorbance, a solution of photosystem I with silver nanoparticles as an absorber layer is used. We show that the short circuit current density and the efficiency can be enhanced to 6.61 mA/cm2 and 0.83%, respectively which are the highest values for current density and efficiency reported for this kind of solar cell. These enhancements are due to the high electrical conductivity of carbon nanotubes, proper porosity of tyrosine and the localized surface plasmon resonance (LSPR) of silver nanoparticles induced under light irradiation. Our results can illuminate hopes and dreams for biophotovoltaic solid state solar cells with higher current density and higher efficiency.This article is protected by copyright. All rights reserved.

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“…At higher concentration of FNP, spherical shape of nanoparticle reduces the frictional force between the cone plate geometry which decreases the entanglement between PVDF chains [54]. Also, the higher concentration of solid nanoparticles enhanced the stability of fluids under shear up to the long term [50]. Moreover, the magnitude of the storage and loss modulus of P1, P3 and P5 increases, while, that of P7 decreased.…”

Section: Rheological Studymentioning

confidence: 99%

“…Fe 3 O 4 nanoparticles (FNP) were synthesized with rapid microwave method using a domestic microwave oven (MW73AD-B/XTL, Samsung) as reported in the [50]. FeCl 2 •4H 2 O (s) and FeCl 3 •6H 2 O (s) were mixed in a 1:2 molar ratio and dissolved in 100 ml of deionized water preheated at 80 °C.…”

Section: Synthesis Of Fe 3 O 4 Nanoparticlesmentioning

confidence: 99%

“…As per our recent study on PVDF:FNP nanocomposites, they show promising applications in flexible magnetic and mechanical films for soft body armor and memory storage [50]. To further characterize the PVDF:FNP nanocomposites for possible applications in coatings, we have measured the viscoelastic behavior and yield strength of all PVDF:FNP nanocomposites.…”

Section: Rheological Studymentioning

confidence: 99%

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Photocatalytic degradation of malachite green using PVDF membranes doped with Fe₃O₄ nanoparticles: role of porosity and surface roughness

Kanak,

Yogita,

Singh

et al. 2023

Phys. Scr.

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We report on a cost-effective and time-efficient approach to synthesize flexible membranes of polyvinylidene fluoride (PVDF) doped with varying concentrations of Fe3O4 nanoparticles (FNP). The membranes exhibit a uniform dispersion of FNPs, a β-phase structure, and porous morphology, as confirmed by x-ray diffraction (XRD), scanning electron microscopy (SEM), and atomic force microscopy (AFM) measurements. Fourier Transform-Infra Red (FTIR) and x-ray Photon spectroscopy (XPS) analysis was also performed for the identification of structural and chemical parameters of PVDF:FNP membranes. Photocatalytic degradation of malachite green (MG) dye under ultraviolet (UV) irradiation was assessed using the PVDF:FNP membranes. The results demonstrate a significant enhancement in the degradation efficiency and rate constant of the photocatalytic process with the utilization of PVDF:FNP membranes compared to FNP alone. Among the various concentrations tested, the PVDF membrane with 7% FNP doping exhibited the highest degradation efficiency of 98.39% and a notable apparent rate constant of 0.07048 min−1 in 60 min. The improved photocatalytic performance can be attributed to the larger surface area and enhanced accessibility of active sites in PVDF:FNP membranes, facilitating better control of the reaction environment and reducing the recombination rate of electron–hole pairs. This study suggests that PVDF:FNP membranes hold great promise for water purification applications, offering flexible membranes with superior degradation efficiency and enhanced reusability.

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Magnetically tunable rheological properties of PVDF doped with superparamagnetic Fe3O4 nanoparticles synthesized by rapid microwave method

Cited by 9 publications

References 46 publications

Near-Infrared Reflective Greenhouse Covering: A Novel Strategy for Electricity-Free Cooling

Near-Infrared Reflective Greenhouse Covering: A Novel Strategy for Electricity-Free Cooling

Efficiency Enhancement of Biophotovoltaic Solid‐State Solar Cells

Photocatalytic degradation of malachite green using PVDF membranes doped with Fe₃O₄ nanoparticles: role of porosity and surface roughness

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Magnetically tunable rheological properties of PVDF doped with superparamagnetic Fe3O4 nanoparticles synthesized by rapid microwave method

Cited by 9 publications

References 46 publications

Near-Infrared Reflective Greenhouse Covering: A Novel Strategy for Electricity-Free Cooling

Near-Infrared Reflective Greenhouse Covering: A Novel Strategy for Electricity-Free Cooling

Efficiency Enhancement of Biophotovoltaic Solid‐State Solar Cells

Photocatalytic degradation of malachite green using PVDF membranes doped with Fe3O4 nanoparticles: role of porosity and surface roughness

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Product

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Photocatalytic degradation of malachite green using PVDF membranes doped with Fe₃O₄ nanoparticles: role of porosity and surface roughness