Effect of Low-Pressure Plasma Surface Modification on Filtration Performance of Chitosan Nanofibrous Respiratory Filter

Khawar, Muhammad Tauseef; Gong, Rong; Zia, Qasim; Nawaz, Hifza; Li, Jiashen

doi:10.1007/s12221-023-00029-7

Cited by 3 publications

(1 citation statement)

References 34 publications

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“…Effective capture of aerosols and respiratory comfort is crucial for medical protective materials [ 1 ]. However, high filtration efficiency always accompanies with high filtration resistance [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

PTFE/PVA-PVDF Conjugated Electrospun Nanofiber Membrane with Triboelectric Effect Used in Face Mask

Kang

Ma²,

Wang

et al. 2023

Fibers Polym

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COVID-19 broke out all over the world, and the medical protective mask is an important epidemic prevention equipment. Traditional medical protective masks use electret polypropylene melt-blown cloth as the core filter material. However, it relies heavily on electrostatic filtration and has high filtration resistance. The one-time electret makes the static charge decay rapidly with the water vapor generated by breathing, which affects the service life of the mask. In this paper, PTFE/PVA fiber and PVDF fiber were fabricated by conjugate electrospinning method, and the PTFE/PVA-PVDF layer blending fluffy fiber membrane was obtained by on-line mixing. Under the action of air slip effect and triboelectric secondary electret, the fiber membrane has higher filtration efficiency, lower filtration resistance and longer service life. The initial filtration efficiency of the fiber membrane is above 95%, the filtration efficiency is near to 100% after 24 times of cyclic filtration, the filtration resistance is about 110 Pa, the air permeability of the fiber membrane is 262.88–370.70 mm/s, and the moisture permeability is as high as 7721–8471 g/ (m 2 ·24 h). Graphical Abstract

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Section: Introductionmentioning

confidence: 99%

PTFE/PVA-PVDF Conjugated Electrospun Nanofiber Membrane with Triboelectric Effect Used in Face Mask

Kang

Ma²,

Wang

et al. 2023

Fibers Polym

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Environmentally Friendly Approach for the Plasma Surface Modification of Fabrics for Improved Fog Harvesting Performance

Gürsoy,

Kocadayıoğulları

2023

Fibers Polym

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The relevance of vascular adjustments to hemodynamic control in the face of temperature change in Crotalus durissus

Castro,

Prado,

Wang

et al. 2024

Journal of Experimental Biology

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The presence of cardiac shunts in ectothermic tetrapods is thought to be consistent with active vascular modulations for proper hemodynamic support. Local control of blood flow modulates tissue perfusion and thus systemic conductance (Gsys) is assumed to increase with body temperature (Tb) to accommodate higher aerobic demand. However, the general increase of Gsys presses for a higher right-to-left (R–L) shunt, which reduces arterial oxygen concentration. In contrast, Tb reduction leads to a Gsys decrease and a left-to-right shunt, which purportedly increases pulmonary perfusion and plasma filtration in the respiratory area. This investigation addressed the role of compensatory vascular adjustments in the face of the metabolic alterations caused by Tb change in the South American rattlesnake (Crotalus durissus). Cardiovascular recordings were performed in decerebrated rattlesnake preparations at 10, 20 and 30°C. The rise in Tb increased metabolic demand, and correlated with an augmentation in heart rate. Although cardiac output increased, systemic stroke volume reduced while pulmonary stroke volume remained stable. Although that resulted in a proportionally higher increase in pulmonary blood flow, the R–L shunt was maintained. While the systemic compliance of large arteries was the most relevant factor in regulating arterial systemic blood pressure, peripheral conductance of pulmonary circulation was the major factor influencing the final cardiac shunt. Such dynamic adjustment of systemic compliance and pulmonary resistance for shunt modulation has not been demonstrated before and contrasts with previous knowledge on shunt control.

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Effect of Low-Pressure Plasma Surface Modification on Filtration Performance of Chitosan Nanofibrous Respiratory Filter

Cited by 3 publications

References 34 publications

PTFE/PVA-PVDF Conjugated Electrospun Nanofiber Membrane with Triboelectric Effect Used in Face Mask

PTFE/PVA-PVDF Conjugated Electrospun Nanofiber Membrane with Triboelectric Effect Used in Face Mask

Environmentally Friendly Approach for the Plasma Surface Modification of Fabrics for Improved Fog Harvesting Performance

The relevance of vascular adjustments to hemodynamic control in the face of temperature change in Crotalus durissus

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