Branched nanofibers for biodegradable facemasks by double bubble electrospinning

Ali, Muhammad; Ain, Qura Tul; HuanHe, Ji

doi:10.2478/acmy-2020-0007

Cited by 7 publications

(3 citation statements)

References 25 publications

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“…Our results highlight the critical importance of not only reducing gap dimensions, where gaps of greater than 1% can result in significant fractions of airflow bypassing the filter material, but also of maximally reducing ventilation resistance (though not at the expense of particulate filtering performance). Choosing engineered nanofiber materials as opposed to the more typical melt-blown filter layer [ 3 , 4 , 45 , 46 ], for example, may help to make mask performance less sensitive to small gaps. Interestingly, we also find that very small gap sizes (less than 0.5% of the mask area) are likely to have a minimal impact on fit factor, potentially allowing future design to strike a balance between comfort and fit factor in select usage scenarios.…”

Section: Discussionmentioning

confidence: 99%

The critical importance of mask seals on respirator performance: An analytical and simulation approach

Lee

Collins

2021

PLoS ONE

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Filtering facepiece respirators (FFRs) and medical masks are widely used to reduce the inhalation exposure of airborne particulates and biohazardous aerosols. Their protective capacity largely depends on the fraction of these that are filtered from the incoming air volume. While the performance and physics of different filter materials have been the topic of intensive study, less well understood are the effects of mask sealing. To address this, we introduce an approach to calculate the influence of face-seal leakage on filtration ratio and fit factor based on an analytical model and a finite element method (FEM) model, both of which take into account time-dependent human respiration velocities. Using these, we calculate the filtration ratio and fit factor for a range of ventilation resistance values relevant to filter materials, 500–2500 Pa∙s∙m−1, where the filtration ratio and fit factor are calculated as a function of the mask gap dimensions, with good agreement between analytical and numerical models. The results show that the filtration ratio and fit factor are decrease markedly with even small increases in gap area. We also calculate particle filtration rates for N95 FFRs with various ventilation resistances and two commercial FFRs exemplars. Taken together, this work underscores the critical importance of forming a tight seal around the face as a factor in mask performance, where our straightforward analytical model can be readily applied to obtain estimates of mask performance.

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Section: Discussionmentioning

confidence: 99%

The critical importance of mask seals on respirator performance: An analytical and simulation approach

Lee

Collins

2021

PLoS ONE

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“…It is found that increasing the density of nanofiber layer and reducing the diameter of Nylon6 fiber can improve the filtration performance. Some of researchers prepared branched nanofibers by using a novel double bubble electrospinning setup (Ali et al, 2020). PVA and PVP were simultaneously electrospun to fabricate biodegradable branched nanofiber mat which was suggested as highly efficient filter material especially for facemasks.…”

Section: Figure 2: Sem Of Electrospun Nanofiber Matmentioning

confidence: 99%

Advances in Air Filters Based on Electrospun Nanofibers

Alia¹,

Ain²

2020

Env.cont.Reviews

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This paper reviews the background and developments of air filters based on electrospun nanofiber materials. Methods of electrospinning in the production of filter materials and their advantages are discussed in detail. Researchers around the globe are working hard to get highly efficient filters at low cost. Famous approaches to build most effective air filters include electrospun nanofiber mats, composite nanofiber mats, and antibacterial nanofiber mats for micro to nano level filtration at a higher rate. Properties like high temperature, alkali, acid, and flame resistance are still constraining the use of nanofiber filters in many industries. Future research should be focused on producing nanofiber mats capable of undergoing extreme conditions.

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“…Nanofibers are one-dimensional structures whose cross-sectional diameter is in the nanometric range (from 1 to 100 nm). Due to their structure and morphology, there can be distinguished porous, ribbon, branched, or hollow nanofibers, and each of them is created under specific conditions of their production process (Stanishevsky, Wetuski, and Yockell-Lelièvre, 2016 [ 16 ]; Li et al, 2017 [ 17 ]; Ali, Ain, and HuanHe, 2020 [ 18 ]). There are several approaches of nanofibers production such as phase separation, consisting of joint gelation of the polymer and solvent (Ma and Zhang, 1999 [ 19 ]).…”

Section: Introductionmentioning

confidence: 99%

New Biocomposite Electrospun Fiber/Alginate Hydrogel for Probiotic Bacteria Immobilization

et al. 2021

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Biotechnological use of probiotic microorganisms involves providing them with appropriate conditions for growth, but also protection against environmental changes caused by an exchange of the medium, isolation of metabolites, etc. Therefore, the research on effective immobilization of probiotic microorganisms should be focused in this direction. The present study aimed to evaluate the effectiveness of an innovative hybrid immobilization system based on electrospun nanofibers and alginate hydrogel. The analyses carried out included the study of properties of the initial components, the evaluation of the degree and durability of cell immobilization in the final material, and their survival under stress conditions. Effective binding of microorganisms to the hydrogel and nanofibers was confirmed, and the collected results proved that the proposed biocomposite is an efficient method of cell protection. In addition, it was shown that immobilization on electrospun nanofibers leads to the preservation of the highest cell activity and the least cell growth restriction as compared to free or lyophilized cells only. The completed research opens new perspectives for the effective immobilization of microorganisms of significant economic importance.

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Branched nanofibers for biodegradable facemasks by double bubble electrospinning

Cited by 7 publications

References 25 publications

The critical importance of mask seals on respirator performance: An analytical and simulation approach

The critical importance of mask seals on respirator performance: An analytical and simulation approach

Advances in Air Filters Based on Electrospun Nanofibers

New Biocomposite Electrospun Fiber/Alginate Hydrogel for Probiotic Bacteria Immobilization

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