Preparation of multifunctional AgNPs/PAN nanofiber membrane for air filtration by one-step process

2020 ◽  
Vol 49 (5) ◽  
pp. 355-361
Author(s):  
Wenxiu Yang ◽  
Lin Li ◽  
Shuo Wang ◽  
Jinshu Liu
Keyword(s):  
Composite Membrane ◽  
Air Conditioning ◽  
High Performance ◽  
Antibacterial Property ◽  
Air Filtration ◽  
Nanofiber Membrane ◽  
Content Type ◽  
Composite Nanofiber ◽  
One Step ◽  
Pan Nanofiber

Purpose The purpose of this paper is to fabricate a high-performance filtration electrospun nanofiber membrane with antibacterial function. The Ag nanoparticles (AgNPs) gotten by reducing AgNO3 act as antimicrobial agent. Then the AgNPs/Polyacrylonitrile (AgNPs/PAN) composite nanofiber membrane was prepared by electrospinning. Design/methodology/approach The electrospun Ag/PAN composite membrane was prepared by one step, in which the Ag particles were acting as antibacterial agent and PAN nanofiber as the upholder of the composite mat. AgNPs were obtained by reducing AgNO3 in N,N-Dimethylformamide (DMF) solution at high temperature. Meanwhile, the PAN particles were added to DMF solution and dissolved. Then the Ag/PAN nanofiber was obtained by electrospinning. Findings The thinner nanofiber can be produced with PAN concentration of 12 per cent and AgNPs concentration of 10 per cent. Finally, the filtration resistance of the composite membrane with antibacterial property is as high as 99.1 per cent, and the filtration efficiency is only 83 Pa. Therefore, the AgNPs/PAN composite membrane is the ideal choice for air filtration with antibacterial property. Originality/value The AgNPs/PAN composite nanofiber membrane has high filtration performance for particulate matter (PM)25 and outstanding antibacterial property to Escherichia coli and Staphylococcus aureus, which can be used with masks, air-conditioning filters (including car air-conditioning filters), window screening and other similar objects.

scholarly journals High performance of boehmite/polyacrylonitrile composite nanofiber membrane for polymer lithium-ion battery

RSC Advances ◽  
2020 ◽  
Vol 10 (46) ◽  
pp. 27492-27501
Author(s):  
Xiang Li ◽  
Shilin Chen ◽  
Zilong Xia ◽  
Li Li ◽  
Wenhui Yuan
Keyword(s):  
Lithium Ion Battery ◽  
High Performance ◽  
Lithium Ion ◽  
Nanofiber Membrane ◽  
Electrospinning Technique ◽  
Composite Nanofiber

In this study, a novel boehmite/polyacrylonitrile (BM/PAN) composite nanofiber membrane was prepared using the electrospinning technique.

scholarly journals Preparation of Ag Doped Keratin/PA6 Nanofiber Membrane with Enhanced Air Filtration and Antimicrobial Properties

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1511 ◽  
Author(s):  
Baolei Shen ◽  
Dongyu Zhang ◽  
Yujuan Wei ◽  
Zihua Zhao ◽  
Xiaofei Ma ◽  
...  
Keyword(s):  
Composite Membrane ◽  
High Efficiency ◽  
Large Diameter ◽  
Composite Membranes ◽  
Dark Field ◽  
Filtration Efficiency ◽  
Air Filtration ◽  
Nanofiber Membrane ◽  
Scanning Calorimetry ◽  
Antibacterial Performance

Coarse wool is a kind of goat wool that is difficult to further process in the textile industry due to its large diameter, dispersion, better strength, and less bending. Therefore, coarse wool is often discarded as waste or made into low-cost products. In this work, keratin was extracted from coarse wool by a high-efficiency method, and then, an Ag-doped keratin/PA6 composite nanofiber membrane with enhanced filtration and antibacterial performance was prepared using HCOOH as solvent and reductant. HAADF-STEM (high-angle annular dark field-scanning transmission electron microscopy) shows that AgNPs are uniformly distributed in keratin/PA6 (30/70) nanofibers. TGA (Thermogravimetric Analysis) and DSC (Differential Scanning Calorimetry) were employed to investigate the thermal stability of composite membranes with different keratin and AgNP contents. The present keratin as a dopant with polyamide-6 (PA6) was found not only to improve air filtration efficiency but also to enhance water–vapour transmission (WVT). The addition of the Ag nanoparticles (AgNPs) gave a strong antibacterial activity to the composite membrane against Staphylococcus aureus (99.62%) and Escherichia coli (99.10%). Bacterial filtration efficiency (BFE) of the composite membrane against S. aureus and E. coli were up to 96.8% and 95.6%, respectively. All of the results suggested a great potential for coarse wool extraction and application in the air filtration field.

scholarly journals GO/Bi2S3 Doped PVDF/TPU Nanofiber Membrane with Enhanced Photothermal Performance

2020 ◽  
Vol 21 (12) ◽  
pp. 4224
Author(s):  
Wenxiu Yang ◽  
Yonggui Li ◽  
Long Feng ◽  
Yimiao Hou ◽  
Shuo Wang ◽  
...  
Keyword(s):  
Composite Membrane ◽  
Irradiation Time ◽  
Equilibrium Temperature ◽  
Test Methods ◽  
Nanofiber Membrane ◽  
Photothermal Conversion ◽  
Broadband Absorption ◽  
Conversion Materials ◽  
One Step ◽  
Absorption Performance

Photothermal conversion materials have attracted wide attention due to their efficient utilization of light energy. In this study, a (GO)/Bi2S3-PVDF/TPU composite nanofiber membrane was systematically developed, comprising GO/Bi2S3 nanoparticles (NPs) as a photothermal conversion component and PVDF/TPU composite nanofibers as the substrate. The GO/Bi2S3 NPs were synthesized in a one-step way and the PVDF/TPU nanofibers were obtained from a uniformly mixed co-solution by electrospinning. GO nanoparticles with excellent solar harvesting endow the GO/Bi2S3-PVDF/TPU membrane with favorable photothermal conversion. In addition, the introduction of Bi2S3 NPs further enhances the broadband absorption and photothermal conversion properties of the GO/Bi2S3-PVDF/TPU composite membrane due to its perfect broadband absorption performance and coordination with GO. Finally, the results show that the GO/Bi2S3-PVDF/TPU composite membrane has the highest light absorption rate (about 95%) in the wavelength range of 400–2500 nm. In the 300 s irradiation process, the temperature changes in the GO/Bi2S3-PVDF/TPU composite membrane were the most significant and rapid, and the equilibrium temperature of the same irradiation time was 81 °C. Due to the presence of TPU, the mechanical strength of the composite film was enhanced, which is beneficial for its operational performance. Besides this, the morphology, composition, and thermal property of the membranes were evaluated by corresponding test methods.

A novel bi-functional double-layer rGO–PVDF/PVDF composite nanofiber membrane separator with enhanced thermal stability and effective polysulfide inhibition for high-performance lithium–sulfur batteries

2017 ◽  
Vol 5 (29) ◽  
pp. 15096-15104 ◽  
Author(s):  
Pei Zhu ◽  
Jiadeng Zhu ◽  
Jun Zang ◽  
Chen Chen ◽  
Yao Lu ◽  
...  
Keyword(s):  
Double Layer ◽  
Polyvinylidene Fluoride ◽  
High Performance ◽  
Nanofiber Membrane ◽  
Electrospinning Technique ◽  
Pvdf Membrane ◽  
Reduced Graphene ◽  
Lithium Sulfur Batteries ◽  
Composite Nanofiber ◽  
Lithium Sulfur

A novel, bi-functional double-layer reduced graphene oxide (rGO)–polyvinylidene fluoride (PVDF)/PVDF membrane was fabricated by a simple electrospinning technique and was used as a promising separator for lithium–sulfur batteries.

Fabrication of a polyvinylidene fluoride tree-like nanofiber web for ultra high performance air filtration

RSC Advances ◽  
2016 ◽  
Vol 6 (94) ◽  
pp. 91243-91249 ◽  
Author(s):  
Zongjie Li ◽  
Weimin Kang ◽  
Huihui Zhao ◽  
Min Hu ◽  
Jingge Ju ◽  
...  
Keyword(s):  
Polyvinylidene Fluoride ◽  
High Performance ◽  
Air Filtration ◽  
One Step ◽  
Nanofiber Web

A novel polyvinylidene fluoride tree-like nanofiber web for high performance air filtration was successfully fabricated via one-step electrospinning.

scholarly journals Self-Powered Electrospun Composite Nanofiber Membrane for Highly Efficient Air Filtration

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1706
Author(s):  
Zungui Shao ◽  
Jiaxin Jiang ◽  
Xiang Wang ◽  
Wenwang Li ◽  
Liang Fang ◽  
...  
Keyword(s):  
Pressure Drop ◽  
The Self ◽  
Nano Particles ◽  
Air Filtration ◽  
Nanofiber Membrane ◽  
Electrostatic Adsorption ◽  
Highly Efficient ◽  
Electrostatic Charges ◽  
Composite Nanofiber ◽  
Self Powered

Highly efficient air filtration with low pressure drop is the key to air purification. In this work, a self-powered electrospun nanofiber membrane with an electrostatic adsorption effect was prepared to improve the filtration efficiency of micro/nano particles. The composite membrane was comprised of polyvinyl chloride (PVC) nanofibers and polyamide-6 (PA6) nanofibers. The triboelectric effect between the two adjacent nanofiber membranes generated electrostatic charges under the action of air vibration, by which the electrostatic adsorption with the same pressure drop was enhanced. The electrostatic voltage on the self-powered nanofiber membrane was 257.1 mV when the flow velocity was 0.1 m/s. For sodium chloride (NaCl) aerosol particles with a diameter of 0.3 μm, the removal efficiency of the self-powered composite nanofiber membrane was 98.75% and the pressure drop was 67.5 Pa, which showed a higher quality factor than the membrane without electrostatic charges. This work provides an effective way to improve the filtration performance of air filter membranes.

scholarly journals Microstructure and property of regenepercentaged silk fibroin/chitosan nanofibers

2016 ◽  
Vol 20 (3) ◽  
pp. 979-983
Author(s):  
Lei Zhao ◽  
Yuan-Fang He ◽  
Qian-Wen Wang ◽  
Chun-Hui He
Keyword(s):  
Silk Fibroin ◽  
Composite Membrane ◽  
Antibacterial Property ◽  
Weight Ratio ◽  
Nanofiber Membrane ◽  
Electrospun Membrane ◽  
Elongation At Break ◽  
Chitosan Concentration ◽  
Chitosan Membrane ◽  
Chitosan Nanofiber

Composite silk fibroin/chitosan nanofiber membrane was fabricated by bubbfil electrospinning. The influence of chitosan content on composite membrane's microstructure, mechanical property, and the percentage of water-dissolved were studied experimentally. The result indicated that the crystallinity of electrospun membrane was enhanced by increasing chitosan concentration. It is noteworthy that the percentage of water-dissolved was the minimum when the weight ratio of silk fibroin/chitosan was 70:30. After the composite membrane treated by the methanol, the percentage of water-dissolved of the nanofiber membrane decreased significantly. The strength and elongation at break of composite membrane increased gradually with the increased content of chitosan. Additionally, the electrospun silk fibroin/chitosan membrane showed excellent antibacterial property.

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