Smart and recyclable admicelle-coated Fe3O4 nanoparticles for treating oily wastewater

Wang, Hong; Zhang, Xinyu; Fang, Yun; San, Khin Nyein Ei; Fan, Ye

doi:10.1016/j.jece.2022.107445

Cited by 6 publications

(6 citation statements)

References 45 publications

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“…When the pH was 3–5, the MNPDNML microspheres had minor positive charges on the surface, resulting in high hydrophobicity, leading to large θ values. However, as the pH increased, the MNPDNML microspheres were rendered hydrophilic due to the deprotonation of carboxyl groups, leading to a gradually smaller θ value . It was shown that the surface wettability of MNPDNML microspheres could be changed by adjusting the pH of the environment.…”

Section: Resultsmentioning

confidence: 99%

“…However, as the pH increased, the MNPDNML microspheres were rendered hydrophilic due to the deprotonation of carboxyl groups, leading to a gradually smaller θ value. 45 It was shown that the surface wettability of MNPDNML microspheres could be changed by adjusting the pH of the environment. Oil−water interfacial tension played an important role in the microstructure and stability of the Pickering emulsions.…”

Section: Investigation Of Interfacial Activity Of Mnpdnml Microsphere...mentioning

confidence: 99%

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Controllable Regulation of Diesel Oil-in-Water Pickering Emulsion Stability by Multiresponsive Recyclable Magnetic Polymer Brush Microvessels

Dai,

Li,

Yang

2024

ACS Appl. Mater. Interfaces

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To ensure safety and efficiency in the production and transportation of fuel oil, there is an urgent demand to develop intelligent emulsifiers to deal with this challenge. Fe 3 O 4 @PDA-P(NIPAM-b-MAA-b-LMA) (MNPDNML) microspheres were prepared by modifying polydopamine and the triblock polymer brush P(NIPAM-b-MAA-b-LMA) on the surface of Fe 3 O 4 nanoparticles via oxidative autopolymerization and SI-RAFT polymerization. Therefore, the MNPDNML microspheres exhibited sensitive stimulus-responsive behavior to pH, temperature, near-infrared (NIR) laser radiation, and magnetic fields. The stability state of the emulsion could be modulated by changing pH, temperature, magnetic field, and NIR radiation, and the reversible switching of emulsification/breaking behavior could be reached at least 10 times. This "intelligent emulsifier" exhibited high emulsification efficiency, long-term stability, and on-demand emulsification/breaking properties. It was notable that MNPDNML microspheres showed excellent emulsification ability for olive oil, kerosene, gasoline, and crude oil, which allowed the material to be widely used in the controlled transportation and separation of fuel oil.

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Section: Resultsmentioning

confidence: 99%

Section: Investigation Of Interfacial Activity Of Mnpdnml Microsphere...mentioning

confidence: 99%

Controllable Regulation of Diesel Oil-in-Water Pickering Emulsion Stability by Multiresponsive Recyclable Magnetic Polymer Brush Microvessels

Dai,

Li,

Yang

2024

ACS Appl. Mater. Interfaces

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“…9 Thus, Pickering emulsions have been applied to oil spill remediation and oil−water separation. 10,11 Stabilization of Pickering emulsions is an important factor for oil−water separation, which is due to nanoparticles adsorbing onto the water−oil interface and encapsulating oil droplets. 12 Additionally, the controlled emulsification and breaking of responsive Pickering emulsions are a great advantage in the process of oil−water separation.…”

Section: ■ Introductionmentioning

confidence: 99%

“…6 Wang et al 28 employed surface-initiated atom transfer radical polymerization (SI-ATRP) to prepare core−shell structured magnetic nanoparticles (MNPs) as recyclable stabilizers for oil−water separation. Wang et al 11 prepared SCA@Fe 3 O 4 by selfassembly and self-cross-linking strategies by coating conjugated sodium linoleate on the surface of nano-Fe 3 O 4 , which was used for oily wastewater treatment.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Pickering emulsions are stabilized using nanoparticles instead of surfactants, which offer great merits such as environmental friendliness, ease of surface functionalization, and lower toxicity . Thus, Pickering emulsions have been applied to oil spill remediation and oil–water separation. , Stabilization of Pickering emulsions is an important factor for oil–water separation, which is due to nanoparticles adsorbing onto the water–oil interface and encapsulating oil droplets . Additionally, the controlled emulsification and breaking of responsive Pickering emulsions are a great advantage in the process of oil–water separation .…”

Section: Introductionmentioning

confidence: 99%

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Multiresponsive Behavior of the Pickering Emulsifier and Its Application for Collecting Small Oil Droplets in Water

Li,

Zhang

et al. 2024

Langmuir

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Responsive Pickering emulsions, with unique nanoparticle interfaces and sensitivity to external stimuli, significantly enhanced the stability and applicability of Pickering emulsions. Multifunctional composite material poly((2-(dimethylaminoethyl methacrylate)-b-(acrylate cyclodextrin))/Fe 3 O 4 nanoparticles, namely P(DMAEMA-b-A-CD)/Fe 3 O 4 , with both multiresponsive characteristics and emulsifying capabilities had been designed to remove small oil droplets from water. Using the reversible addition−fragmentation chain transfer (RAFT) method, diblock polymers P(DMAEMA-b-A-CD) were grown in a controlled manner on the surface of Fe 3 O 4 . The Fe 3 O 4 core showed responsiveness to a magnetic field, and the block copolymers prepared via the RAFT method demonstrated reactivity to both pH and CO 2 . The P(DMAEMAb-A-CD)/Fe 3 O 4 nanoparticles exhibited the capability to form Pickering/Oxford emulsions with exceptional stabilization properties. It could be observed that the introduction of CO 2 , acid, and a magnetic field led to the breakage of the emulsion, while the emulsion could be restabilized by removing the CO 2 and the magnetic field or by adding alkali. Measurements of interfacial tension, ζ-potential, and contact angle demonstrated that the emulsification/breakdown mechanisms associated with pH and CO 2 /N 2 were related to the surface wettability of the nanoparticles. In addition, the emulsifier had an excellent cycling capacity with at least 10 cycles by CO 2 /N 2 . Additionally, P(DMAEMA-b-A-CD)/Fe 3 O 4 nanoparticles exhibited excellent stability in oil phases with large polarity differences and various real oil phases with different viscosities. Importantly, the P(DMAEMA-b-A-CD)/ Fe 3 O 4 nanoparticles could serve as functional materials for efficiently separating small oil droplets from water through the application of a magnetic field. Therefore, P(DMAEMA-b-A-CD)/Fe 3 O 4 nanoparticles held promising potential as materials with economic and commercial value for oil−water separation applications.

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Efficient removal of heavy metals in water utilizing facile cross-link conjugated linoleic acid micelles

Wang,

Huang,

Zheng

et al. 2024

Environ Sci Pollut Res

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Smart and recyclable admicelle-coated Fe3O4 nanoparticles for treating oily wastewater

Cited by 6 publications

References 45 publications

Controllable Regulation of Diesel Oil-in-Water Pickering Emulsion Stability by Multiresponsive Recyclable Magnetic Polymer Brush Microvessels

Controllable Regulation of Diesel Oil-in-Water Pickering Emulsion Stability by Multiresponsive Recyclable Magnetic Polymer Brush Microvessels

Multiresponsive Behavior of the Pickering Emulsifier and Its Application for Collecting Small Oil Droplets in Water

Efficient removal of heavy metals in water utilizing facile cross-link conjugated linoleic acid micelles

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