Air permeability of nanofiber membrane with hierarchical structure

Liu, Yanqing; Feng, Jiawen; Zhang, Chengcheng; Teng, Yue; Liu, Zhi; He, Ji‐Huan

doi:10.2298/tsci1804637l

Cited by 58 publications

(42 citation statements)

References 13 publications

(15 reference statements)

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“…The fractal geometry was proposed by Mandelbrot [1], this influential idea has contributed remarkably to mathematics and has found many practical applications from social science, economics to engineering, and life. Fractal is mathematically beautiful and physically imperative to deal with discontinuous problems, such as heat conduction through a porous medium or a hierarchical structure [2][3][4][5][6][7][8][9][10]. Many hierarchical structures can be approximately considered as fractals though they are not, a porous medium is always considered as a fractal space though it is not.…”

Section: Introductionmentioning

confidence: 99%

On two-scale dimension and its applications

2019

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Dimension or scale is everything. When a thing is observed by different scales, different results can be obtained. Two scales are enough for most of practical problems, and a new definition of a two-scale dimension instead of the fractal dimension is given to deal with discontinuous problems. Fractal theory considers a self-similarity pattern, which cannot be found in any a real problem, while the two-scale theory observes each problem with two scales, the large scale is for an approximate continuous problem, where the classic calculus can be fully applied, and on the smaller scale, the effect of the porous structure on the properties can be easily elucidated. This paper sheds a new light on applications of fractal theory to real problems.

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Section: Introductionmentioning

confidence: 99%

On two-scale dimension and its applications

2019

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“…The values related to the fibers will be denoted by upper indices, 2k, the values related to the infinite matrix will be denoted by upper index (1). We assume that matrix and the fibers materials are homogeneous, linear viscoelastic, and isotropic.…”

Section: Formulation Of the Problemmentioning

confidence: 99%

“…Here, we obtain a solution to the corresponding quasistatic problem by replacing the elastic constants by corresponding operators. The followings are obtained: where *(1) E and * (1) ν are the following operators:…”

Section: S431mentioning

confidence: 99%

“…The functions ψ and χ are determined from the equations: u , (1) λ , (1) µ , (1),0 zz σ , respectively, for the matrix and by (2 ),1…”

Section: S431mentioning

confidence: 99%

“…As we can see some of them in [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19], there are a lot of experimental and theoretical investigations focus on composites including fibers and nanofibers. It is very important to know the mechanisms of the fracture of the composites under uniaxial compression along the reinforcing elements.…”

Section: Introductionmentioning

confidence: 99%

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On internal stability loss of a row unidirected periodically located fibers in the visco-elastic matrix

Köşker

2019

THERM SCI

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Original scientific paper https://doi.org/10.2298/TSCI181128055KIn the present paper, the microbuckling or internal stability loss in the viscoelastic composites containing unidirected fibers under compression along the fibers is studied by use of piecewise homogeneous body model. In this model, it is used the 3-D geometrically non-linear exact equations of viscoelasticity theory. The composite material was considered as an infinite viscoelastic body with a row unidirected periodically located elastic fibers that have an initial infinitesimal imperfection. When the initial imperfection starts to increase and becomes indefinitely, this is taken as a stability loss criterion and co-phase microbuckling mode out of plane are taken into account. The numerical results about the influence of the interaction between the fibers on the values of the critical time are obtained and presented.

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Recent Advances in Wearable Tactile Sensors Based on Electrospun Nanofiber Platform

Wang

et al. 2023

Advanced Sensor Research

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Wearable electronics have triggered the great development of flexible tactile sensors for promising applications such as healthcare monitoring, motion detection, and human-machine interaction. However, most of the flexible sensors are constructed on compact and airtight polymer films with inferior flexibility and no breathability, hindering the wearability and comfortability for long-time continuous operation usage. To address such challenges, flexible sensors based on the electrospun polymer platform with comprehensive advantages of ultrathin thickness, superior flexibility, excellent stretchability, high porosity, low density, and surface functionality are emerging. It has become a hot research direction, and considerable progress has been made. Therefore, it is necessary to timely review the latest findings on the rapidly developing electrospun nanofiber-based tactile sensors. Firstly, the principle of the electrospinning technique, the factors affecting the nanofiber morphology, and the engineering of the nanofibers are briefly introduced, and the key material and structural factors affecting the sensing performance are analyzed. Secondly, representative work on the electrospun nanofiber-based tactile sensors is discussed in detail according to the sensing mechanism. Thirdly, unique properties of electrospun nanofibers, such as superior flexibility, breathability, hydrophobicity, anti-bacterial, and self-cleaning, are highlighted. Finally, the remaining challenges and future development trends are outlined.

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Air permeability of nanofiber membrane with hierarchical structure

Cited by 58 publications

References 13 publications

On two-scale dimension and its applications

On two-scale dimension and its applications

On internal stability loss of a row unidirected periodically located fibers in the visco-elastic matrix

Recent Advances in Wearable Tactile Sensors Based on Electrospun Nanofiber Platform

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