Spunbonded needle-punched nonwoven geotextiles for filtration and drainage applications: Manufacturing and structural design

Ding, Zezhao; Babar, Aijaz Ahmed; Wang, Chao; Zhang, Peng; Wang, Xianfeng; Yu, Jianyong; Ding, Bin

doi:10.1016/j.coco.2020.100481

Cited by 38 publications

(10 citation statements)

References 69 publications

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“…Despite differences among brands, face masks are generally made by assembling different layers of a thin nonwoven textile: a waterproof outer layer to repel fluids, a middle filtering layer to prevent particles and pathogen-containing droplets from penetrating in either direction, an inner layer of absorbent material to trap droplets from the user. The nonwoven fabric is obtained by bonding a mass of filaments together using heat, chemical, or mechanical means (spunbond and meltblown methods) to produce smooth, porous and highly durable sheets ( Ding et al, 2020 ). Among the suitable plastic polymers, polypropylene is the most common used for assembling surgical mask, as it is relatively cheap and with low melt viscosity for easy processing ( Chua et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Uncovering the release of micro/nanoplastics from disposable face masks at times of COVID-19

Morgana¹,

Casentini

Amalfitano

2021

Journal of Hazardous Materials

145

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Wearing face masks is a fundamental prevention and control measure to limit the spread of COVID-19. The universal use and improper disposal of single-use face masks are raising serious concerns for their environmental impact, owing to the foregone contribution to plastic water pollution during and beyond the pandemic. This study aims to uncover the release of micro/nanoplastics generated from face mask nonwoven textiles once discarded in the aquatic environment. As assessed by microscopy and flow cytometry, the exposure to different levels of mechanical stress forces (from low to high shear stress intensities) was proved effective in breaking and fragmenting face mask fabrics into smaller debris, including macro-, micro-, and nano-plastics. Even at the low level of fabric deterioration following the first second of treatment, a single mask could release in water thousands of microplastic fibers and up to 10 8 submicrometric particles, mostly comprised in the nano-sized domain. By contributing to the current lack of knowledge regarding the potential environmental hazards posed by universal face masking, we provided novel quantitative data, through a suitable technological approach, on the release of micro/nanoplastics from single-use face masks that can threaten the aquatic ecosystems to which they finally end-up.

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Section: Introductionmentioning

confidence: 99%

Uncovering the release of micro/nanoplastics from disposable face masks at times of COVID-19

Morgana¹,

Casentini

Amalfitano

2021

Journal of Hazardous Materials

145

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“…The raw materials for the dry-laying method are textiles; for the wet-laying method they are paper materials; and finally, in the extruded polymer-laying method, melted plastics are used (Durga and Kalra 2020). Spunbonded nonwovens are mainly produced in 3 steps: (1) filament spinning, (2) web formation, and (3) web bonding (Ding et al 2020). To use recycled PET bottles in the extruded polymerlaying method of nonwoven production, first, the used bottles are cut into flakes, and after washing and drying, they are transferred to the extruder, and the melted PET is used to produce nonwoven fabric in this method.…”

Section: Recycled Pet Fibersmentioning

confidence: 99%

Recent Studies on Recycled PET Fibers: Production and Applications: a Review

et al. 2021

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Increasing demand for non-biodegradable plastics undesirably leads to their accumulation and calls for an appropriate solution for this global crisis. Environmental impacts of PET waste have long been addressed; although some remedies have been proposed, their extensive use in the modern world use demands new studies and recycling techniques. It shows the inadequacy of previous solutions to eliminate this environmental problem. Therefore, researching this subject should not be considered an insignificant issue. Distinctively, this review article has a specific reliance on the use of recycled PET fibers in the production of high-consumption and value-added products that, in addition to considering environmental aspects, can also be attractive to the market. This article deals with recent studies in three product categories (concrete, nonwoven fabrics, yarns) made from recycled PET fibers and shows the high potential of PET fibers for the future industry.

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“…The removal of solids and particles from the air or liquids with filters is required by production processes or other types of work in the manufacturing industry. For example, drug, semiconductor, medical treatment materials, biotechnology, drinking water, and even air conditioning industries employ filtration technology to assure a pollution-free work environment and non-polluting products [1][2][3][4][5][6]. Alternative materials for filters with corresponding purposes include the following: polypropylene (PP), polyethylene (PE), and polyurethane (PU) for air filters [7,8]; Nomex ® , glass fibers, and Teflon ® for hot gas filtration [9]; and activated carbon [10,11], ion exchange resin [12,13], and ceramic membranes [14][15][16][17] for drinking water and sewage disposal.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Needleless Electrospinning Polyvinyl Alcohol/Water-Soluble Chitosan Nanofibrous Membranes: Antibacterial Property and Filter Efficiency

et al. 2022

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Electrospinning is an efficient method of producing nanofibers out of polymers that shows a great potential for the filtration territory. Featuring water-soluble chitosan (WS-CS), a low-pollution process and a self-made needleless machine, PVA/WS-CS nanofibrous membranes were prepared and evaluated for nanofiber diameter, bacteriostatic property, filtration efficiency, pressure drop, and quality factor. Test results indicate that the minimal fiber diameter was 216.58 ± 58.15 nm. Regardless of the WS-CS concentration, all of the PVA/WS-CS nanofibrous membranes attained a high porosity and a high water vapor transmission rate (WVTR), with a pore size of 12.06–22.48 nm. Moreover, the membranes also exhibit bacteriostatic efficacy against Staphylococcus aureus, an optimal quality factor of 0.0825 Pa−1, and a filtration efficiency as high as 97.0%, that is 72.5% higher than that of common masks.

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Spunbonded needle-punched nonwoven geotextiles for filtration and drainage applications: Manufacturing and structural design

Cited by 38 publications

References 69 publications

Uncovering the release of micro/nanoplastics from disposable face masks at times of COVID-19

Uncovering the release of micro/nanoplastics from disposable face masks at times of COVID-19

Recent Studies on Recycled PET Fibers: Production and Applications: a Review

Preparation of Needleless Electrospinning Polyvinyl Alcohol/Water-Soluble Chitosan Nanofibrous Membranes: Antibacterial Property and Filter Efficiency

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