Fabrication of GO/PAN Nanofiber Membrane Grafted with Chitosan as Efficient Adsorbent for Dye Removal

Lu, Yanran; Zhang, Wen; Wang, Mei; Zhang, Hua; Li, Jiahui; Luo, Wenhao

doi:10.1007/s10924-022-02393-6

Cited by 10 publications

(2 citation statements)

References 59 publications

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“…Both membranes showed the characteristic peaks for PAN: C≡ stretching vibration and C-H stretching vibration were observed at 2244 cm −1 and 344 cm −1 , respectively [48]. Additionally, the C=O stretching vibration at 1667 cm −1 may b derived from the hydrophilic polymer during the PAN synthesis [49]. FTIR spectroscopy was used to analyze the functional groups in the PAN and H-PAN membranes [46,47].…”

Section: Characterizationmentioning

confidence: 99%

Enrichment of Nutmeg Essential Oil from Oil-in-Water Emulsions with PAN-Based Membranes

Yin,

Zhang,

Cui

et al. 2024

Membranes

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This study used polyacrylonitrile (PAN) and heat-treated polyacrylonitrile (H-PAN) membranes to enrich nutmeg essential oils, which have more complex compositions compared with common oils. The oil rejection rate of the H-PAN membrane was higher than that of the PAN membrane for different oil concentrations of nutmeg essential oil-in-water emulsions. After heat treatment, the H-PAN membrane showed a smaller pore size, narrower pore size distribution, a rougher surface, higher hydrophilicity, and higher oleophobicity. According to the GC-MS results, the similarities of the essential oils enriched by the PAN and H-PAN membranes to those obtained by steam distillation (SD) were 0.988 and 0.990, respectively. In addition, these two membranes also exhibited higher essential oil rejection for Bupleuri Radix, Magnolia Officinalis Cortex, Caryophylli Flos, and Cinnamomi Cortex essential oil-in-water emulsions. This work could provide a reference for membrane technology for the non-destructive separation of oil with complex components from oil-in-water emulsions.

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Section: Characterizationmentioning

confidence: 99%

Enrichment of Nutmeg Essential Oil from Oil-in-Water Emulsions with PAN-Based Membranes

Yin,

Zhang,

Cui

et al. 2024

Membranes

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show abstract

“…One effective strategy to enhance the stability of GO layers is to introduce cross-linking agents. Chitosan (CS), with its high stability and ultra-high dye adsorption capacity, is a good choice for a crosslinking agent [34,35] . For example, Lu et al constructed CS-GO/polyacrylonitrile (PAN) nanofiber membranes by grafting CS onto GO.…”

Section: Introductionmentioning

confidence: 99%

Graphene oxide membranes using MOF@Chitosan core-shell nanoparticles as dual modulators for dye separation

Wang,

Guo,

Cui

et al. 2024

Chem Synth

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Graphene oxide (GO) membranes hold significant promise for the water purification. However, they also face the problem of structural swelling, which limits their use in water treatment applications. In this work, a novel dual-modulated core-shell metal-organic framework@Chitosan (MOF@CS) was successfully synthesized and used as an intercalation cross-linker to optimize the interlayer spacing and stability of GO membranes. Molecular dynamics simulation confirms that MOF@CS, acting as an intercalator, accelerates the water diffusion rate within the channels of the GO layer compared to a pure GO layer. At the same time, Fourier Transform Infrared Spectroscopy analysis reveals that MOF@CS serves as a cross-linker for covalently cross-linking the GO layer. The nanofiltration performance and stability of the improved MOF@CS-GO composite membranes were significantly enhanced. Compared to the pure GO membranes, the MOF@CS-GO composite membranes exhibited enhanced Congo red rejection rates (from 76.5% to 95.6%) while maintaining a high pure water flux (34.5 L·m-2·h-1·bar-1) and good structural stability (stable dye removal performance over 120 h). This dual regulation strategy is expected to effectively solve the swelling problem of GO membranes in aqueous media and open up avenues for advancing their performance.

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Electrospun Hydrophobic Nanofiber Films from Biodegradable Zein and Curcumin with Improved Tensile Strength for Air Filtration

Xie

et al. 2022

J Polym Environ

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Zein as a natural protein had been widely used in various elds due to its biodegradability and biocompatibility. However, its sensitivity to humidity and poor mechanical performance limited its application in practice. In this study, zein-based composite nano bers loaded with curcumin were prepared by electrospinning assisted with polyvinyl alcohol (PVA). The ltration e ciency of the modi ed nano bers to the particles with diameters larger than 0.5 µm was all above 98%. The loaded curcumin interacted with protein molecular chains to form a network structure within tightly connected nano bers, which exhibited excellent moisture resistance and good adhesion to cellulose paper towels used as air lter substrates. Meanwhile, its tensile strength had also been enhanced vastly to 0.72 MPa compared with the initial tensile strength of 0.21 MPa. This study provides a new electrospinning strategy for the preparation of zein-based composite nano bers that can be widely utilized in air ltration with high moisture resistance.

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Fabrication of GO/PAN Nanofiber Membrane Grafted with Chitosan as Efficient Adsorbent for Dye Removal

Cited by 10 publications

References 59 publications

Enrichment of Nutmeg Essential Oil from Oil-in-Water Emulsions with PAN-Based Membranes

Enrichment of Nutmeg Essential Oil from Oil-in-Water Emulsions with PAN-Based Membranes

Graphene oxide membranes using MOF@Chitosan core-shell nanoparticles as dual modulators for dye separation

Electrospun Hydrophobic Nanofiber Films from Biodegradable Zein and Curcumin with Improved Tensile Strength for Air Filtration

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