A flexible biomimetic superhydrophobic and superoleophilic 3D macroporous polymer-based robust network for the efficient separation of oil-contaminated water

Saleh, Tawfik A.; Baig, Nadeem; Alghunaimi, Fahd; Aljuryyed, Norah

doi:10.1039/c9ra06579b

Cited by 24 publications

(12 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The distinct absorption band at 1726 cm –1 is attributed to the −CO stretching. In the FTIR spectra, the range of 2800–3300 cm –1 is attributed to the −C–H stretching vibration . Based on the above analysis of the FTIR spectra, the PU foam that incorporated the BiOBr catalyst powder is fabricated successfully though an in situ polymerization reaction.…”

Section: Results and Discussionmentioning

confidence: 99%

“…As shown in Figure 3a, the FTIR analysis of the raw material Bi(NO 3 ) 3 •5H 2 O was utilized to investigate the In the FTIR spectra, the range of 2800−3300 cm −1 is attributed to the −C−H stretching vibration. 34 Based on the above analysis of the FTIR spectra, the PU foam that incorporated the BiOBr catalyst powder is fabricated successfully though an in situ polymerization reaction. Figure 3b presents the contents of C, O, Bi, Br, and Si elements of SH PU-3 as 85.2, 11.3, 1.4, 1.3, and 0.8%, respectively.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Superhydrophobic Self-Supporting BiOBr Aerogel for Wastewater Purification

et al. 2020

View full text Add to dashboard Cite

This research was focused on the raw material level construction of bismuth oxybromide (BiOBr) catalysis-loaded 3D crosslinked network polyurethane (PU) foam via the in situ polymerization method. After modification of superhydrophobic polydivinylbenzene nanoparticles, the PU foam possessed excellent superhydrophobic stability. The larger selective absorption oil phase capacity depended on its macroporous structure, and the existence of catalyst BiOBr (the band gap energy was about 2.57 eV) among the PU foam played a crucial role in degrading water-soluble contaminants under visible light irradiation. In this article, the photocatalytic experiment results verify that it has remarkable recycle degradation ability (the degradation efficiency can reach ∼97%) and the capture experiments indicate that the uppermost active species is h + .

show abstract

Section: Results and Discussionmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Superhydrophobic Self-Supporting BiOBr Aerogel for Wastewater Purification

et al. 2020

View full text Add to dashboard Cite

show abstract

“…As shown in Figure 3 a, the absorption peaks near 2936, 1128, 1009, 891, 712, and 492 cm −1 , are attributed to the stretching vibrations of C-H, P=O, P-O − , P-OH, COPO 3 2− , and PO 4 3− structures from the PA molecules, respectively [ 40 , 41 ]. Three characteristic peaks at 471, 797, and 1111 cm −1 are assigned to different modes of vibration for Si-O-Si [ 42 , 43 , 44 ]. From the spectrum of the PA–silica sol, the vibrations of P-O − , P-OH, and COPO 3 2− disappeared, indicating the incorporation of the PA molecules into the silica network.…”

Section: Resultsmentioning

confidence: 99%

Construction of a Phytic Acid–Silica System in Wood for Highly Efficient Flame Retardancy and Smoke Suppression

et al. 2021

View full text Add to dashboard Cite

The intrinsic flammability of wood restricts its application in various fields. In this study, we constructed a phytic acid (PA)–silica hybrid system in wood by a vacuum-pressure impregnation process to improve its flame retardancy and smoke suppression. The system was derived from a simple mixture of PA and silica sol. Fourier transform infrared spectroscopy (FTIR) indicated an incorporation of the PA molecules into the silica network. Thermogravimetric (TG) analysis showed that the system greatly enhanced the char yield of wood from 1.5% to 32.1% (in air) and the thermal degradation rates were decreased. The limiting oxygen index (LOI) of the PA/silica-nanosol-treated wood was 47.3%. Cone calorimetry test (CCT) was conducted, which revealed large reductions in the heat release rate and smoke production rate. The appearance of the second heat release peak was delayed, indicating the enhanced thermal stability of the char residue. The mechanism underlying flame retardancy was analyzed by field-emission scanning electron microscope coupled with energy-dispersive spectroscopy (SEM-EDS), FTIR, and TG-FTIR. The improved flame retardancy and smoke-suppression property of the wood are mainly attributed to the formation of an intact and coherent char residue with crosslinked structures, which can protect against the transfer of heat and mass (flammable gases, smoke) during burning. Moreover, the hybrid system did not significantly alter the mechanical properties of wood, such as compressive strength and hardness. This approach can be extended to fabricate other phosphorus and silicon materials for enhancing the fire safety of wood.

show abstract

“…The latter can be further divided into organic and inorganic [ 25 , 26 ]. Synthesis of composite materials employing both synthetic and natural substances is a developing technique and the amount of published research is fast growing [ 27 , 28 , 29 ]. This methodology allows to exploit both the potential of synthetic materials and the cost-effectiveness of natural ones with the aim of improving chemical-physical characteristics [ 30 , 31 , 32 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

Efficient and Fast Removal of Oils from Water Surfaces via Highly Oleophilic Polyurethane Composites

Nino

Olivito

Algieri

et al. 2021

Toxics

View full text Add to dashboard Cite

In this study we evaluated the oil adsorption capacity of an aliphatic polyurethane foam (PU 1) and two of its composites, produced through surface coating using microparticles of silica (PU-Si 2) and activated carbon (PU-ac 3). The oil adsorption capacity in diesel was improved up to 36% using the composite with silica and up to 50% using the composite with activated carbon with respect to the initial PU 1. Excellent performances were retained in gasoline and motor oil. The adsorption was complete after a few seconds. The process follows a monolayer adsorption fitted by the Langmuir isotherm, with a maximum adsorption capacity of 29.50 g/g of diesel for the composite with activated carbon (PU-ac 3). These materials were proved to be highly oleophilic for oil removal from fresh water and sea water samples. Regeneration and reuse can be repeated up to 50 times by centrifugation, without a significant loss in adsorption capacity.

show abstract

A flexible biomimetic superhydrophobic and superoleophilic 3D macroporous polymer-based robust network for the efficient separation of oil-contaminated water

Abstract: Superhydrophobic polyurethane for oil and water separation.

Cited by 24 publications

References 39 publications

Superhydrophobic Self-Supporting BiOBr Aerogel for Wastewater Purification

Superhydrophobic Self-Supporting BiOBr Aerogel for Wastewater Purification

Construction of a Phytic Acid–Silica System in Wood for Highly Efficient Flame Retardancy and Smoke Suppression

Efficient and Fast Removal of Oils from Water Surfaces via Highly Oleophilic Polyurethane Composites

Contact Info

Product

Resources

About