A study on novel waterproof and moisture-permeable poly(vinylidene fluoride) micropore membrane-coated fabrics

Zhao-hui, Wei; Gu, Zhengrong

doi:10.1002/1097-4628(20010131)79:5<801::aid-app40>3.0.co;2-j

Cited by 8 publications

(4 citation statements)

References 16 publications

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“…Recently, electrospinning method that could obtain fibrous membranes with tunable porous structure has been considered as an available strategy for preparing membranes with breathable and waterproof performance . Consequently, many kinds of electrospun breathable and waterproof membranes have been prepared using various polymers, including polyurethane (PU), polyvinylidene fluoride, polyacrylonitrile, and polypropylene . Among these studies, PU has gained the most attention owing to the prominent elasticity and abrasive resistance, which is important for the practical application .…”

Section: Introductionmentioning

confidence: 99%

Hydrophobic Fibrous Membranes with Tunable Porous Structure for Equilibrium of Breathable and Waterproof Performance

Yang

et al. 2016

Adv Materials Inter

104

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to water penetrating and permissibility of vapor transmitting. [ 1 ] According to the previous researches, the fascinating properties of breathable and waterproof performance would be mainly come from the porous structure consisted of hydrophobic raw materials. [ 2 ] Therefore, it has developed various methods to fabricate membranes with outstanding breathable and waterproof performance, such as biaxial stretching, [ 3 ] template-based methods, [ 4 ] and phase separation. [ 5 ] Nevertheless, these methods are still subjected to the diffi culty in regulating the porous structure to achieve best equilibrium of breathable and waterproof performance, as well as the complicated fabricating procedure.Recently, electrospinning method that could obtain fi brous membranes with tunable porous structure has been considered as an available strategy for preparing membranes with breathable and waterproof performance. [ 6 ] Consequently, many kinds of electrospun breathable and waterproof membranes have been prepared using various polymers, including poly urethane (PU), [ 7 ] polyvinylidene fl uoride, [ 8 ] polyacrylonitrile, [ 9 ] and polypropylene. [ 10 ] Among these studies, PU has gained the most attention owing to the prominent elasticity and abrasive resistance, which is important for the practical application. [ 11 ] However, on account of the bad hydrophobicity and relative large fi ber diameter, the electrospun PU membranes in the previous studies exhibited either poor breathability (water vapor transmission (WVT) rate ≤5 kg m −2 d −1 ) or inferior waterproofness (hydrostatic pressure ≤10 kPa). [ 7,12 ] Our group has reported a fabrication strategy of waterproof and breathable fi brous membranes by introducing of hydrophobic PU and carbon nanotubes. Benefi ting from the low surface energy property of PU and hierarchical roughness built from carbon nanotubes, the membranes exhibit high WVT rate (9.2 kg m −2 d −1 ) and hydrostatic pressure (108 kPa). [ 13 ] But, carbon nanotubes are hard to be dispersed in polymer solution and easy to aggregate during electrospinning, which would bring about enormous degradation of performance. Therefore, it is remain a serious challenge to develop an effective and facile strategy to fabricate membranes with outstanding breathable and waterproof performance.It is well known that the electrospun membranes are constructed from randomly accumulating of fi bers, which result Breathable and waterproof membranes have great importance in various applications due to their permissibility of vapor transmitting and resistance to water penetrating. Despite the available strategies, it remains a serious challenge to fabricate membranes with best equilibrium of breathable and waterproof performance. Herein, hydrophobic fi brous membranes have been designed and prepared via electrospinning using polyurethane and fl uorinated polyurethane as the raw polymers. By regulating the relative humidity and electrospinning time, fi brous membranes with tunable porous structure have obtained. Signifi cantly...

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Section: Introductionmentioning

confidence: 99%

Hydrophobic Fibrous Membranes with Tunable Porous Structure for Equilibrium of Breathable and Waterproof Performance

Yang

et al. 2016

Adv Materials Inter

104

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“…Many kinds of electrospun breathable and water/windproof membranes have been prepared using various polymers including PU [33], polyacrylonitrile (PAN) [35], polypropylene [42], nylon [43], and polyvinylidene fluoride [44]. Depending on what kind of polymer is used in electrospinning, properties of the nanofiber web can vary.…”

Section: Introductionmentioning

confidence: 99%

Hybrid electrospun nanofibrous membranes: Influence of layer arrangement and composition ratio on moisture management behavior

Sangtabi

Dolatabadi

Gorji

et al. 2019

Journal of Industrial Textiles

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This study aimed to examine the fabrication of bi-constituent nanofibrous membranes and investigation of their moisture management behavior in various environmental conditions. In doing so, polyurethane with a hydrophobic nature and superior mechanical behavior and poly(2-acrylamido-2-methylpropane sulfonic acid) (PAMPS) with a hydrophilic nature were utilized. Different hybrid electrospun nanofibrous membranes were aligned based on different layer arrangements and composition ratios. Then, the impacts of the solid fraction of polymers, sequence of stacking, and environmental conditions on water vapor permeability, contact angle, and acidic water permeation were measured and discussed. Tracing the water vapor permeability behavior in samples was carried out through measuring the amount of permeation hourly and proposing some regression models. Bi-modal nanofibrous membranes were successfully fabricated using PAMPS and polyurethane with an average fiber diameter of 543.5 and 216.7 nm, respectively. As the volume fraction of PAMPS increased, the porosities of the samples remained unchanged, the number of pores increased, and the pore size decreased (the average pore diameter was 299.97 nm for the PAMPS sample and 492.35 nm for the polyurethane sample). Despite the better water vapor permeability of the polyurethane membranes than that of the PAMPS membranes, in the first 12 h of the water vapor permeability test, the trend was completely reverse. The results also revealed that in the relative humidity of 55%, the polyurethane layer had the highest water vapor permeability among all samples. The results of the acidic water permeation and contact angle tests showed that the hybrid electrospun nanofibrous membranes exhibit better wicking and wetting properties.

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“…Regarding this last subject, it is generally accepted that pore diameters in the 10 2 -10 4 nm interval are required for effective waterproofness and breathability. [15] Still, the control of the porosity of the hydrophobic polymers is very imperfect due to the limitations of the conventional processing. Alternatives include new polymeric formulations, [15,16] and the use of more exotic polymer processing technologies such as electrospinning.…”

Section: Introductionmentioning

confidence: 99%

“…[15] Still, the control of the porosity of the hydrophobic polymers is very imperfect due to the limitations of the conventional processing. Alternatives include new polymeric formulations, [15,16] and the use of more exotic polymer processing technologies such as electrospinning. [17][18][19] Organic gels in general, and resorcinol/formaldehyde (RF) resins in particular, are polymeric systems that show tremendous versatility in terms of developing tailored porous textures.…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic and breathable resorcinol-formaldehyde Xerogels

Alonso-Buenaposada

Arenillas

Montes-Morán

et al. 2017

Journal of Non-Crystalline Solids

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A new macroporous, waterproof and breathable material has been synthetized. The synthesis of these materials consists in a modified version of the classical resorcinol-formaldehyde (RF) xerogels synthesis. This new process includes a further treatment, after the gelation-curing-drying process, with methanol at 240 ºC in order to passivate the hydrophilic phenolic groups of the surface of the RF xerogel. It was found that the treatment time strongly depends on the pore size of the xerogels. After reaching this threshold time, the hydrophilic materials become superhydrophobic. It is postulated that the exohedral inner surface of the porous xerogels, different from most porous materials, is responsible for this behavior. Although the materials exhibit a superhydrophobic behavior against liquid water and maintain its waterproofness for a long period of time, they are able to adsorb/desorb water vapor, which makes them also breathable.

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A study on novel waterproof and moisture-permeable poly(vinylidene fluoride) micropore membrane-coated fabrics

Cited by 8 publications

References 16 publications

Hydrophobic Fibrous Membranes with Tunable Porous Structure for Equilibrium of Breathable and Waterproof Performance

Hydrophobic Fibrous Membranes with Tunable Porous Structure for Equilibrium of Breathable and Waterproof Performance

Hybrid electrospun nanofibrous membranes: Influence of layer arrangement and composition ratio on moisture management behavior

Superhydrophobic and breathable resorcinol-formaldehyde Xerogels

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