A Hierarchical Structure of Flower-Like Zinc Oxide and Poly(Vinyl Alcohol-<i>co</i>-Ethylene) Nanofiber Hybrid Membranes for High-Performance Air Filters

Yao, Zhi Cheng; Xia, Ming; Xiong, Ziyin; Wu, Yi; Cheng, Peng; Cheng, Qin; Xu, Jia; Wang, Dong; Liu, Ke

doi:10.1021/acsomega.1c06114

Cited by 11 publications

(5 citation statements)

References 41 publications

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“…6). As shown on the figure, diffraction peaks in the XRD pattern for the synthetic flower-like ZnO superstructure are consistent with the values of the hexagonal wurtzite structure for ZnO crystals in the standard card (JCPDS No.36-1451), and sharp diffraction peaks with high intensities indicate that it is indeed highly crystalline (Yao et al, 2022).…”

Section: Xrd Testsupporting

confidence: 79%

Moisture Harvesting Efficacy Utilizing Flower-like ZnO Nanostructures Coated on Cotton Fabrics

Mardani,

Rakhshandehroo,

Zerafat

2024

Preprint

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Nanocomposite fabrics have been extensively employed as moisture harvesting media. In this study, flower-like zinc oxide nanostructures were coated on cotton fabrics by precipitation technique at different operational conditions of precursor concentration, temperature, and residence time. Then, the impact of aforementioned parameters on wettability of coated fabrics and morphology of nanostructures were investigated through contact angle measurements and SEM/EDX analyses, respectively. Optimal conditions of the coating process was experimentally determined and later validated by Minitab software. Afterwards, the fabrics prepared at optimal conditions were utilized in moisture harvesting experiments which were planned to scrutinize the effects of 3 parameters; humid airflow rate, temperature, and humidity on the final amount of harvested moisture. Experimental results in terms of water contact angle led to an optimal value of 156°. Moreover, Minitab confirmation of the obtained results revealed that the optimization of coating process occurred at a precursor concentration of 3.1 mM, a temperature of 85°C, and a residence time of 50 minutes. Furthermore, SEM/EDX analyses ascertain the flower-like zinc oxide nanostructure coating as well as its uniform distribution on the fabric surface. The abrasion resistance of the coated nanostructure was evaluated via performing a standard abrasion test proving the coating mechanical stability, as evidenced by a negligible reduction in the contact angle. Finally, optimum moisture harvesting results led to 64.8 mg/cm2.h of water, showing the dominancy of air humidity effect on the amount of harvested moisture as compared to factors such as temperature or airflow.

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Section: Xrd Testsupporting

confidence: 79%

Moisture Harvesting Efficacy Utilizing Flower-like ZnO Nanostructures Coated on Cotton Fabrics

Mardani,

Rakhshandehroo,

Zerafat

2024

Preprint

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“…In 2022, Ma et al [ 98 ] combined flexible polyacrylonitrile nanofibers (PANF), functional polyvinyl alcohol (PVA) polymer, conductive carbon nanotubes (CNTs), and hydrophobic octadecylamine functionalized reduced graphene oxide (ODA-rGO) to form layered porous aerogels, achieving the fusion of self-cleaning, oil–water separation, and piezoresistive sensing. In 2022, Yao et al [ 104 ] obtained the ZnO@nanofiber hybrid air filter by coating the mixture of flower-like ZnO superstructures and the PVA-co-PE nanofiber suspension on the surface of meltblown polypropylene (PP) nonwoven, with the electret charge eliminated. The flower-like ZnO superstructures significantly reduced the pressure drop of the pure PVA-co-PE nanofiber air filter and improved filtration efficiency.…”

Section: Tuning Of Nanofiber Materialsmentioning

confidence: 99%

Advanced functional nanofibers: strategies to improve performance and expand functions

Chen

Cao

et al. 2022

Front. Optoelectron.

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Nanofibers have a wide range of applications in many fields such as energy generation and storage, environmental sensing and treatment, biomedical and health, thanks to their large specific surface area, excellent flexibility, and superior mechanical properties. With the expansion of application fields and the upgrade of application requirements, there is an inevitable trend of improving the performance and functions of nanofibers. Over the past few decades, numerous studies have demonstrated how nanofibers can be adapted to more complex needs through modifications of their structures, materials, and assembly. Thus, it is necessary to systematically review the field of nanofibers in which new ideas and technologies are emerging. Here we summarize the recent advanced strategies to improve the performances and expand the functions of nanofibers. We first introduce the common methods of preparing nanofibers, then summarize the advances in the field of nanofibers, especially up-to-date strategies for further enhancing their functionalities. We classify these strategies into three categories: design of nanofiber structures, tuning of nanofiber materials, and improvement of nanofibers assemblies. Finally, the optimization methods, materials, application areas, and fabrication methods are summarized, and existing challenges and future research directions are discussed. We hope this review can provide useful guidance for subsequent related work. Graphical abstract

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“…The PM 2.5 removal efficiency of the fiber membrane was above 95%, and the pressure drop was less than 100 Pa. Liu et al [ 20 ] combined spinning and spraying techniques to fabricate a PVA/ethyl cellulose composite membrane, which recorded filtration efficiencies of 99.74% and 99.77% for PM 1.0 and PM 2.5 , respectively. Yao et al [ 21 ] prepared monodispersed ZnO particles using template- and surfactant-free hydrothermal methods and fabricated PVA-co-PE fibers using a melt extrusion phase-separation technique. The air filter was obtained by coating a mixture of ZnO particles and a PVA-co-PE fiber suspension onto a PP meltblown nonwoven fabric, and the filtration efficiency for sodium chloride aerosol with a particle size of 1.0 μm was more than 99.9%.…”

Section: Introductionmentioning

confidence: 99%

One-Step Fast Fabrication of Electrospun Fiber Membranes for Efficient Particulate Matter Removal

Liu,

Lai,

Shi

et al. 2024

Polymers

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Rapid social and industrial development has resulted in an increasing demand for fossil fuel energy, which increases particulate matter (PM) pollution. In this study, we employed a simple one-step electrospinning technique to fabricate polysulfone (PSF) fiber membranes for PM filtration. A 0.3 g/mL polymer solution with an N,N-dimethylformamide:tetrahydrofuran volume ratio of 3:1 yielded uniform and bead-free PSF fibers with a diameter of approximately 1.17 μm. The PSF fiber membrane exhibited excellent hydrophobicity and mechanical properties, including a tensile strength of 1.14 MPa and an elongation at break of 116.6%. Finally, the PM filtration performance of the PSF fiber membrane was evaluated. The filtration efficiencies of the membrane for PM2.5 and PM1.0 were approximately 99.6% and 99.2%, respectively. The pressure drops were 65.0 and 65.2 Pa, which were significantly lower than those of commercial air filters. Using this technique, PSF fiber membrane filters can be easily fabricated over a large area, which is promising for numerous air filtration systems.

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A Hierarchical Structure of Flower-Like Zinc Oxide and Poly(Vinyl Alcohol-co-Ethylene) Nanofiber Hybrid Membranes for High-Performance Air Filters

Cited by 11 publications

References 41 publications

Moisture Harvesting Efficacy Utilizing Flower-like ZnO Nanostructures Coated on Cotton Fabrics

Moisture Harvesting Efficacy Utilizing Flower-like ZnO Nanostructures Coated on Cotton Fabrics

Advanced functional nanofibers: strategies to improve performance and expand functions

One-Step Fast Fabrication of Electrospun Fiber Membranes for Efficient Particulate Matter Removal

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