Recent advances in the development of nanofiber-based aerogel for oil-water separation: A review

Liu, Yanan; Hao, Ming; Chen, Zhijun; Ramakrishna, Seeram; Liu, Yanbo; Wang, Xiaoxiao; Hu, Xiaodong; Wei, Yen

doi:10.1016/j.fuel.2023.129338

Cited by 18 publications

(2 citation statements)

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“…Increasing numbers of water treatment technologies and methods have been developed to address the diverse hazards caused by water pollution. Traditional methods of oil/water separation, such as flotation, skimming, coagulation, and biological oxidation, are used to purify water to the level that meets environmental standards. − However, there are many drawbacks in these separation technologies and methods, such as complex operation, low separation efficiency, high energy consumption, secondary pollution, etc., which does not meet the requirements of energy conservation and environmental protection in today’s society . Therefore, the development and design of a structure or material that can separate oil/water mixtures in a selective, efficient, and environmentally friendly manner has become a priority and has received a great deal of research effort. , …”

Section: Introductionmentioning

confidence: 99%

Construction of a Multiscaled Synergistic Membrane for Efficient Dye Adsorption and Emulsion Separation

Zheng,

Sun,

et al. 2024

ACS Appl. Polym. Mater.

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Water filtering materials have become a research hotspot, as environmental contamination, particularly water pollution, poses a severe threat to human health worldwide. Hence, flower-like multiscaled difunctional synergistic membranes exhibiting superhydrophilicity and underwater superoleophobicity were fabricated via electrospinning and hydrothermal methods for oil/water separation and dye adsorption. Furthermore, the morphology, chemical composition, wettability, water transmission, and oil resistance of the prepared membranes were tested and analyzed. The comprehensive properties of the membranes were evaluated through oil/water separation and dye adsorption. The results show that the obtained flower-like multiscaled [polyamide 66 (PA66)@MIL] membrane has excellent wettability and outstanding oil resistance properties in water (an underwater oil contact angle of 161.08°). Also, after several filtration cycles, the membrane still maintains a high recovery flux (nearly 99%). In addition, the removal rate of the methylene blue solution of the PA66@MIL membrane reached 91.24% after 5 cycles of the adsorption and filtration process due to the synergia of the nanofiber membrane and flower-like material. Moreover, the obtained membrane displayed remarkable stability and retained outstanding hydrophilicity under various harsh conditions (acid, alkali, salt solution, and sonication). This method can provide valuable guidance for the design of high-performance oil/water separation membranes suitable for multiple application scenarios.

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Section: Introductionmentioning

confidence: 99%

Construction of a Multiscaled Synergistic Membrane for Efficient Dye Adsorption and Emulsion Separation

Zheng,

Sun,

et al. 2024

ACS Appl. Polym. Mater.

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“…Aerogels have many fascinating properties, including low density, high porosity, high surface area, and low thermal conductivity [61,62]. These properties make aerogels suitable for many applications such as thermal insulation [63][64][65][66], chemical adsorbents [46,[67][68][69][70], catalyst supports [71,72], air filtration [73,74], and heterogeneous platforms for blocky copolymer functionalization [36,75,76].…”

Section: Introductionmentioning

confidence: 99%

High Modulus, Strut-like poly(ether ether ketone) Aerogels Produced from a Benign Solvent

Spiering,

Godshall,

Moore

2024

Gels

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Poly(ether ether ketone) (PEEK) was found to form gels in the benign solvent 1,3-diphenylacetone (DPA). Gelation of PEEK in DPA was found to form an interconnected, strut-like morphology composed of polymer axialites. To our knowledge, this is the first report of a strut-like morphology for PEEK aerogels. PEEK/DPA gels were prepared by first dissolving PEEK in DPA at 320 °C. Upon cooling to 50 °C, PEEK crystallizes and forms a gel in DPA. The PEEK/DPA phase diagram indicated that phase separation occurs by solid–liquid phase separation, implying that DPA is a good solvent for PEEK. The Flory–Huggins interaction parameter, calculated as χ12 = 0.093 for the PEEK/DPA system, confirmed that DPA is a good solvent for PEEK. PEEK aerogels were prepared by solvent exchanging DPA to water then freeze-drying. PEEK aerogels were found to have densities between 0.09 and 0.25 g/cm3, porosities between 80 and 93%, and surface areas between 200 and 225 m2/g, depending on the initial gel concentration. Using nitrogen adsorption analyses, PEEK aerogels were found to be mesoporous adsorbents, with mesopore sizes of about 8 nm, which formed between stacks of platelike crystalline lamellae. Scanning electron microscopy and X-ray scattering were utilized to elucidate the hierarchical structure of the PEEK aerogels. Morphological analysis found that the PEEK/DPA gels were composed of a highly nucleated network of PEEK axialites (i.e., aggregates of stacked crystalline lamellae). The highly connected axialite network imparted robust mechanical properties on PEEK aerogels, which were found to densify less upon freeze-drying than globular PEEK aerogel counterparts gelled from dichloroacetic acid (DCA) or 4-chlorphenol (4CP). PEEK aerogels formed from DPA were also found to have a modulus–density scaling that was far more efficient in supporting loads than the poorly connected aerogels formed from PEEK/DCA or PEEK/4CP solutions. The strut-like morphology in these new PEEK aerogels also significantly improved the modulus to a degree that is comparable to high-performance crosslinked aerogels based on polyimide and polyurea of comparable densities.

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NH2-CAU-1 modified polyphenylene sulfone (PPSU) membrane for separation of oil-in-water emulsions

Lu,

Yu,

Gao

et al. 2024

J Mater Sci

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Recent advances in the development of nanofiber-based aerogel for oil-water separation: A review

Cited by 18 publications

References 182 publications

Construction of a Multiscaled Synergistic Membrane for Efficient Dye Adsorption and Emulsion Separation

Construction of a Multiscaled Synergistic Membrane for Efficient Dye Adsorption and Emulsion Separation

High Modulus, Strut-like poly(ether ether ketone) Aerogels Produced from a Benign Solvent

NH2-CAU-1 modified polyphenylene sulfone (PPSU) membrane for separation of oil-in-water emulsions

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