Incorporation of nanosized LTL zeolites in dual-layered PVDF-HFP/cellulose membrane for enhanced membrane distillation performance

Nassrullah, Haya; Makanjuola, Olawale; Janajreh, Isam; AlMarzooqi, Faisal; Hashaikeh, Raed

doi:10.1016/j.memsci.2020.118298

Cited by 39 publications

(15 citation statements)

References 38 publications

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“…The stretching vibration of the −CF 2 bonds and the skeletal vibration of the C−C bond were observed at the peaks of 1176 and 877 cm −1 , respectively, which are the characteristic peaks of PH. 23,31,32 The multicomponent peaks in the region from 1000 to 1100 cm −1 and the peak around 800 cm −1 correspond to the Si−O−Si stretching and the Si(CH 3 ) 2 rocking, demonstrating the presence of PDMS. 31,33 In addition, the SEM−EDS elemental maps showed that PDMS was uniformly distributed on the surface and in the cross-section of the membrane (Figure S6).…”

Section: Resultsmentioning

confidence: 99%

In Situ Three-Dimensional Welded Nanofibrous Membranes for Robust Membrane Distillation of Concentrated Seawater

Zhong

Han

et al. 2021

Environ. Sci. Technol.

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Membrane distillation (MD) is a promising technology for treating the concentrated seawater discharged from the desalination process. Interconnected porous membranes, fabricated by additive manufacturing, have received significant attention for MD technology because of their excellent permeability. However, their poor hydrophobic durability induced by the deformation of pores constrains their water desalination performance. Herein, an in situ three-dimensional (3D) welding approach involving emulsion electrospinning is reported for fabricating robust nanofibrous membranes. The reported method is simple and effective for welding nanofibers at their intersections, and the reinforced membrane pores are uniform in the 3D space. The results show that the in situ 3D welded nanofibrous membrane, with a stability of 170 h and water recovery of 76.9%, exhibits better desalination performance than the nonwelded (superhydrophobic) nanofibrous membrane and the postwelded (superhydrophobic) nanofibrous membrane. Furthermore, the stability mechanism of the in situ 3D welded nanofibrous membrane and the two different wetting mechanisms of the nonwelded and postwelded nanofibrous membranes were investigated in the current work. More significantly, the in situ 3D welded nanofibrous membrane can further concentrate the actual concentrated seawater (121°E, 37°N) to crystallization, demonstrating its potential applications for the desalination of challenging concentrated seawater.

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Section: Resultsmentioning

confidence: 99%

In Situ Three-Dimensional Welded Nanofibrous Membranes for Robust Membrane Distillation of Concentrated Seawater

Zhong

Han

et al. 2021

Environ. Sci. Technol.

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“…The peaks at 1400, 1178, and 1070 cm −1 were attributed to the stretching vibrations of CH 2 and CF 2 and the out-ofplane deformation of CF 3 . 32 The bands at around 1278 and 868 cm −1 represent the electroactive β phase of the PVDF-HFP nanofibers and the peak at 610 cm −1 is ascribable to the α phase. 33,34 With the addition of a range of concentrations of PVA/SA, the same characteristic peaks at 1400, 1278, 868, 820, and 610 cm −1 arising from PVDF-HFP could also be observed.…”

Section: Resultsmentioning

confidence: 99%

“…As shown in Figure 4 (a), the peaks at 1400, 1278, 1178, 1070, 868, 820, and 610 cm −1 can be assigned to typical characteristic peaks of PVDF-HFP. The peaks at 1400, 1178 and 1070 cm −1 were attributed to the stretching vibrations of CH2 and CF2 and the out-ofplane deformation of CF3 32 . The bands at around 1278 and 868 cm −1 represent the electroactive β phase of the PVDF-HFP nanofibers and the peak at 610 cm −1 is ascribable to the α phase [33][34] .…”

Section: Performance Of the Intelligent Packagingmentioning

confidence: 99%

Electrospinning SA@PVDF-HFP Core–Shell Nanofibers Based on a Visual Light Transmission Response to Alcohol for Intelligent Packaging

Xiao

Xie

Luo

et al. 2022

ACS Appl. Mater. Interfaces

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A naked-eye detector based on a rapid transmittance response to alcohol was designed to offer real-time and reusable detection of fruit freshness. To ensure the hydrophobicity of the fibrous membrane and high light transmission response to alcohol, fluorine-rich poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) with low refractive index was selected as the shell layer while sodium alginate (SA) and polyvinyl alcohol (PVA) were selected as the core layer for coaxial electrospinning.The core-shell fibrous detector was obtained by treatment with CaCl2 to form a stable

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“…In addition to that, the incorporation of NPs as membrane modifiers to improve fouling resistance and minimize wettability is focused. Few have reported the utilization of silica-based NPs and TiO 2 -NPs for improved membrane hydrophobicity [ 75 , 77 ]. Therefore, the use and effects of different nanomaterials on membrane modifications are discussed in detail in this section.…”

Section: Incorporation Of Nanomaterials For Enhanced Performancementioning

confidence: 99%

Recent Developments in Nanomaterials-Modified Membranes for Improved Membrane Distillation Performance

et al. 2020

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Membrane distillation (MD) is a thermally induced membrane separation process that utilizes vapor pressure variance to permeate the more volatile constituent, typically water as vapor, across a hydrophobic membrane and rejects the less volatile components of the feed. Permeate flux decline, membrane fouling, and wetting are some serious challenges faced in MD operations. Thus, in recent years, various studies have been carried out on the modification of these MD membranes by incorporating nanomaterials to overcome these challenges and significantly improve the performance of these membranes. This review provides a comprehensive evaluation of the incorporation of new generation nanomaterials such as quantum dots, metalloids and metal oxide-based nanoparticles, metal organic frameworks (MOFs), and carbon-based nanomaterials in the MD membrane. The desired characteristics of the membrane for MD operations, such as a higher liquid entry pressure (LEPw), permeability, porosity, hydrophobicity, chemical stability, thermal conductivity, and mechanical strength, have been thoroughly discussed. Additionally, methodologies adopted for the incorporation of nanomaterials in these membranes, including surface grafting, plasma polymerization, interfacial polymerization, dip coating, and the efficacy of these modified membranes in various MD operations along with their applications are addressed. Further, the current challenges in modifying MD membranes using nanomaterials along with prominent future aspects have been systematically elaborated.

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Incorporation of nanosized LTL zeolites in dual-layered PVDF-HFP/cellulose membrane for enhanced membrane distillation performance

Cited by 39 publications

References 38 publications

In Situ Three-Dimensional Welded Nanofibrous Membranes for Robust Membrane Distillation of Concentrated Seawater

In Situ Three-Dimensional Welded Nanofibrous Membranes for Robust Membrane Distillation of Concentrated Seawater

Electrospinning SA@PVDF-HFP Core–Shell Nanofibers Based on a Visual Light Transmission Response to Alcohol for Intelligent Packaging

Recent Developments in Nanomaterials-Modified Membranes for Improved Membrane Distillation Performance

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