Electrospun Nanofibers Withstandable to High-Temperature Reactions: Synergistic Effect of Polymer Relaxation and Solvent Removal

Hu, Guofang; Zhang, Xiangcheng; Liu, Xiaoyan; Yu, Jianyong; Ding, Bin

doi:10.1007/s42765-020-00058-4

Cited by 19 publications

(3 citation statements)

References 35 publications

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“…The polymer nanofiber membranes were prepared by a typical electrospinning process. , For the preparation of PVA/PAA precursor solution, 5 wt % PVA solution was prepared by stirring PVA powder in ultrapure water at 95 °C for 5 h. Then, PAA at a mass loading of 5 wt % was mixed with the above PVA aqueous solution under continuous stirring for 24 h at room temperature. The electrospinning of the PVA/PAA nanofiber membrane was carried out in a 5 mL syringe pump at a feeding rate of 0.08 mm min –1 with a high voltage of 18 kV.…”

Section: Methodsmentioning

confidence: 99%

Metal–Organic Framework Decorated Polymer Nanofiber Composite Separator for Physiochemically Shielding Polysulfides in Stable Lithium–Sulfur Batteries

et al. 2021

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Lithium–sulfur (Li–S) batteries have attracted numerous attention owing to their overwhelming theoretical capacity. However, the dissolution and shuttle effect of lithium polysulfides (LiPSs) have seriously limited the development of Li–S batteries. Herein, we rationally designed a dual-engineered nanofibrous composite separator with a Janus structure to both physically and chemically block LiPS shuttling in Li–S batteries. The separator, consisting of a cross-linked poly(vinyl alcohol)/poly(acrylic acid) (CPP) composite nanofiber matrix and the electrosprayed poly(vinyl alcohol) (PVA)/zeolitic imidazolate framework-8 (ZIF-8) layer on the cathode side, is fabricated through a facile electrospinning–electrospray coupling approach and signed as CPP@PVA/ZIF-8. The intrinsic narrow size and opened Lewis acid sites of ZIF-8 both confine free transport of LiPS anions. Meanwhile, the cross-linked CPP layer with abundant electronegative groups (−COOH) can shield the LiPS shuttle while ensuring the integrity of the flexible separator. Benefiting from the unique Janus structure, the CPP@PVA/ZIF-8 separator demonstrates a high initial capacity of 1125 mAh g–1 at a good coulombic efficiency of 98% over 300 cycles at 0.1 C. This work not only establishes a combined strategy to immobilize LiPSs but also provides novel interfacial engineering modification ideas for the development of high-performance separators in Li–S batteries.

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Section: Methodsmentioning

confidence: 99%

Metal–Organic Framework Decorated Polymer Nanofiber Composite Separator for Physiochemically Shielding Polysulfides in Stable Lithium–Sulfur Batteries

et al. 2021

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“…To address such issues, the electrospinning approach has been considered for membrane preparation. This process involves the application of a strong electric field to generate nanofibers from a charged polymer solution [ 26 , 27 , 28 , 29 , 30 ]. As a result, electrospun nanofiber membranes (ENMs) with random interconnected pores can be formed from overlapping fibers [ 31 , 32 , 33 ], which provide interconnected structures with high porosities that allow liquids to pass through multiple channels [ 34 , 35 ].…”

Section: Introductionmentioning

confidence: 99%

Recovery of Extracellular Polymeric Substances from Excess Sludge Using High-Flux Electrospun Nanofiber Membranes

et al. 2023

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The recycling of extracellular polymeric substances (EPSs) from excess sludge in wastewater treatment plants has received increasing attention in recent years. Although membrane separation has great potential for use in EPS concentration and recovery, conventional membranes tend to exhibit low water flux and high energy consumption. Herein, electrospun nanofiber membranes (ENMs) were fabricated using polyvinylidene fluoride (PVDF) and used for the recovery of EPSs extracted from the excess sludge using the cation exchange resin (CER) method. The fabricated ENM containing 14 wt.% PVDF showed excellent properties, with a high average water flux (376.8 L/(m2·h)) and an excellent EPS recovery rate (94.1%) in the dead-end filtration of a 1.0 g/L EPS solution at 20 kPa. The ENMs displayed excellent mechanical strength, antifouling properties, and high reusability after five recycles. The filtration pressure had a negligible effect on the average EPS recovery rate and water flux. The novel dead-end filtration with an EPS filter cake on the ENM surface was effective in removing heavy-metal ions, with the removal rates of Pb2+, Cu2+, and Cr6+ being 89.5%, 73.5%, and 74.6%, respectively. These results indicate the potential of nanofiber membranes for use in effective concentration and recycling of EPSs via membrane separation.

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“…wearable device [17], mechanical fibers field [18], optical fibers field [19], etc. In addition, the secondary morphology of fibers has an important effect on the properties of fibers.…”

Section: Introductionmentioning

confidence: 99%

Grooved Fibers: Preparation Principles Through Electrospinning and Potential Applications

Zhan

Deng

et al. 2021

Adv. Fiber Mater.

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The surface morphology of micro-and nano-scale fiber determines its application to a great extent. At present, a variety of secondary morphology of microfibers and nanofibers, such as porous, wrinkle, groove and so on, have been prepared. Among them, grooved micro-and nano-fibers are attracting more and more attention because of their unique morphology and properties. In this paper, we review the literature on grooved fibers due to void-based elongation, wrinkle-based elongation, collapsed jet-based elongation and selective dissolution. By contrast, the method of phase separation is simpler and more commonly used than selective dissolution. What is more interesting is that the number and depth of grooves on the fiber surface can be well controlled by adjusting the experimental parameters, which greatly increases the research value and application fields of grooves micro-nano fibers. Grooved fibers can be made from a range of materials: polycaprolactone (PCL), polylactic acid (PLA), polystyrene (PS), cellulose acetate butyrate (CAB) and other polymers. The applications of grooved micro-nano fibers are discussed in detail, including peripheral nerve regeneration, water manipulation and energy conversion.

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Electrospun Nanofibers Withstandable to High-Temperature Reactions: Synergistic Effect of Polymer Relaxation and Solvent Removal

Cited by 19 publications

References 35 publications

Metal–Organic Framework Decorated Polymer Nanofiber Composite Separator for Physiochemically Shielding Polysulfides in Stable Lithium–Sulfur Batteries

Metal–Organic Framework Decorated Polymer Nanofiber Composite Separator for Physiochemically Shielding Polysulfides in Stable Lithium–Sulfur Batteries

Recovery of Extracellular Polymeric Substances from Excess Sludge Using High-Flux Electrospun Nanofiber Membranes

Grooved Fibers: Preparation Principles Through Electrospinning and Potential Applications

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