Electrophysical characteristics of polyurethane/organo-bentonite nanocomposites

Motawie, A. M.; Madani, M.; Esmail, E.A.; Dacrorry, A.Z.; Othman, H.M.; Badr, Magd M.; Abulyazied, Dalia E.

doi:10.1016/j.ejpe.2014.09.005

Cited by 17 publications

(8 citation statements)

References 45 publications

(34 reference statements)

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“…According to the FTIR analysis (Figure 2), the interaction between the fillers and COPUF was observed by the shifted wavenumber of C=O at around 1600 cm −1 . It stemmed from the disturbance of filler particles on the electron vibration of the matrix, as reported previously [29]. In this case, the fillers may have blocked the polymerization by chemically interacting with the C-O from the MDI 2 also confirms the presence of N-H and O-H groups by a broad absorbance band at 3300-3500 cm −1 , which is typical for polyurethane.…”

Section: Reaction Of Modified Puf and Functional Groups' Analysissupporting

confidence: 77%

Filler-Modified Castor Oil-Based Polyurethane Foam for the Removal of Aqueous Heavy Metals Detected Using Laser-Induced Breakdown Spectroscopy (LIBS) Technique

et al. 2020

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The use of polymeric material in heavy metal removal from wastewater is trending. Heavy metal removal from wastewater of the industrial process is of utmost importance in green/sustainable manufacturing. Production of absorbent materials from a natural source for industrial wastewater has been on the increase. In this research, polyurethane foam (PUF), an adsorbent used by industries to adsorb heavy metal from wastewater, was prepared from a renewable source. Castor oil-based polyurethane foam (COPUF) was produced and modified for improved adsorption performance using fillers, analyzed with laser-induced breakdown spectroscopy (LIBS). The fillers (zeolite, bentonite, and activated carbon) were added to the COPUF matrix allowing the modification on its surface morphology and charge. The materials were characterized using Fourier-transform infrared (FTIR), scanning electron microscopy (SEM), and thermal gravimetry analysis (TGA), while their adsorption performance was studied by comparing the LIBS spectra. The bentonite-modified COPUF (B/COPUF) gave the highest value of the normalized Pb I (405.7 nm) line intensity (2.3), followed by zeolite-modified COPUF (Z/COPUF) (1.9), and activated carbon-modified COPUF (AC/COPUF) (0.2), which indicates the adsorption performance of Pb2+ on the respective materials. The heavy metal ions’ adsorption on the B/COPUF dominantly resulted from the electrostatic attraction. This study demonstrated the potential use of B/COPUF in adsorption and LIBS quantitative analysis of aqueous heavy metal ions.

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Section: Reaction Of Modified Puf and Functional Groups' Analysissupporting

confidence: 77%

Filler-Modified Castor Oil-Based Polyurethane Foam for the Removal of Aqueous Heavy Metals Detected Using Laser-Induced Breakdown Spectroscopy (LIBS) Technique

et al. 2020

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“…The pattern indicates an increase in conductivity with rise in temperature. This type of temperature dependence indicates that the electrical conduction in the samples is a thermally activated transport process governed by Arrhenius relation dc = 0 exp( E a /kT ) where 0 is the dc conductivity preexponential factor and E a , the activation energy [39]. (25, 80 °C) for the PAAm/silica nanocomposites versus the contents of silica (wt%).…”

Section: Thermal Stability and Degradationmentioning

confidence: 92%

Physical Properties of Polyacrylamide/Polyvinylalcohol Silica Nanocomposites

Abulyazied¹,

Mansour²,

Mazrouaa³

et al. 2016

J. Res. Updates Polym. Sci.

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In this paper, samples of Polyacrylamide (PAAm) nanosilica nanocomposites were prepared having different concentration of nanosilica (0.125, 0.25, and 0.5). Polyacrylamide (PAAm) and poly (vinyl alcohol) (PVA) were blended with different ratio (3/1, 1/1, 1/3) using solution-cast technique. The prepared films were characterized by Fourier transform infrared (FTIR), X-ray diffractions (XRD) and scanning electron microscopy (SEM). FTIR spectra showed the presence of hydrogen bonding between-CONH2 groups in PAAm and-OH group in PVA and confirm the hydrophilic nature of the blends. X-ray diffractions shows the presence of a strong broad peak centered at 22º (2) confirms the amorphous nature of silica which is supposed to be the characteristic of SiO2. The results obtained from different experimental techniques were supported by SEM image analysis. The thermal stability of the nanocomposites enhanced by increasing the silica content in the blend. The DC electrical conductivity was studied for all prepared samples. It was found that the conductivity increase by increasing silica content as well as, increased by increasing the wt% of PVA.

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“…The blocking way was referred from the FTIR analysis ( Figure 2): The interaction between the HB and polyurethane was observed by the shifted wavenumber of carbonyl groups at around 1600 cm −1 . As a carbon-rich material, HB possessed abundant hydroxyl groups [37] and was more likely to have this interaction [38]. The polyol source also influenced the microstructure of polyurethane composites [39].…”

Section: Polymerization Process and Microstructurementioning

confidence: 99%

Phosphorus Release and Adsorption Properties of Polyurethane–Biochar Crosslinked Material as a Filter Additive in Bioretention Systems

Meng

Wang

2021

Polymers

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Bioretention systems are frequently employed in stormwater treatment to reduce phosphorus pollution and prevent eutrophication. To enhance their efficiency, filter additives are required but the currently used traditional materials cannot meet the primary requirements of excellent hydraulic properties as well as outstanding release and adsorption capacities at the same time. In this research, a polyurethane-biochar crosslinked material was produced by mixing the hardwood biochar (HB) with polyurethane to improve the performance of traditional filter additives. Through basic parameter tests, the saturated water content of polyurethane-biochar crosslinked material (PCB) was doubled and the permeability coefficient of PCB increased by two orders of magnitude. Due to the polyurethane, the leaching speed of phosphorus slowed down in the batching experiments and fewer metal cations leached. Moreover, PCB could adsorb 93–206 mg/kg PO43− at a typical PO43− concentration in stormwater runoff, 1.32–1.58 times more than HB, during isothermal adsorption experiments. In the simulating column experiments, weaker hydropower reduced the PO43− leaching quantities of PCB and had a stable removal rate of 93.84% in phosphate treatment. This study demonstrates the potential use of PCB as a filter additive in a bioretention system to achieve hydraulic goals and improve phosphate adsorption capacities.

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Electrophysical characteristics of polyurethane/organo-bentonite nanocomposites

Cited by 17 publications

References 45 publications

Filler-Modified Castor Oil-Based Polyurethane Foam for the Removal of Aqueous Heavy Metals Detected Using Laser-Induced Breakdown Spectroscopy (LIBS) Technique

Filler-Modified Castor Oil-Based Polyurethane Foam for the Removal of Aqueous Heavy Metals Detected Using Laser-Induced Breakdown Spectroscopy (LIBS) Technique

Physical Properties of Polyacrylamide/Polyvinylalcohol Silica Nanocomposites

Phosphorus Release and Adsorption Properties of Polyurethane–Biochar Crosslinked Material as a Filter Additive in Bioretention Systems

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