Fabrication of three-dimensional superhydrophobic membranes with high porosity via simultaneous electrospraying and electrospinning

Su, Chunlei; Li, Yuping; Dai, Yong; Gao, Fang; Tang, Kexin; Cao, Hongbin

doi:10.1016/j.matlet.2016.01.133

Cited by 91 publications

(55 citation statements)

References 17 publications

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“…The WCA of the membranes increased as the amount of HSG increased, which can be ascribed to the effect of the surface roughness. When the HSG contents increased from 3% to 5%, the WCA were gradually decreased due to the increase in fiber diameter and the pore size . With the increasing of HSG concentration, surface energy could effectively decrease and increase the surface geometry of the composite membranes, and thus leading to the high water resistance.…”

Section: Resultsmentioning

confidence: 99%

Preparation of electrospun polyurethane/hydrophobic silica gel nanofibrous membranes for waterproof and breathable application

Cao

et al. 2017

Polymer Engineering & Sci

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The polyurethane (PU)/hydrophobic silica gel (HSG) fibrous membranes with the hydrophobic and breathable surface was fabricated via electrospinning. By employing the HSG incorporation, mechanical properties, thermal stability, and waterproofness of the composite membranes could be improved. The porous structure of the membranes would be regulated by tuning the temperatures of thermal treatment. When HSG content increased to 3 wt%, the PU/HSG composite membranes possessed remarkable tensile strength of 6.3 MPa and high water contact angle (WCA) of 134°. Furthermore, the maximum WCA (142° ± 1°), good hydrostatic pressure (5.45 kPa), large water vapor transmission rate (8.05 kg/m2/day), and high air permeability (9.25 L/m2/s) of the composite membranes could be achieved by heat treatment at 120°C. The resultant membranes performed significantly better when compared to the pure PU membranes under the same conditions, such as the higher tensile strength (100%), better waterproofness (200%), and stronger breathablity (25%). POLYM. ENG. SCI., 58:1381–1390, 2018. © 2017 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 99%

Preparation of electrospun polyurethane/hydrophobic silica gel nanofibrous membranes for waterproof and breathable application

Cao

et al. 2017

Polymer Engineering & Sci

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“…Actually, methods of electrospinning and electrospraying could be simultaneously effected . Highly porous membranes with superhydrophobic structures throughout their depth were successfully fabricated via simultaneous electrospraying of silica/dimethylacetamide (DMAc) colloids and electrospinning of polyvinylidene fluoride (PVDF)/DMAc solutions.…”

Section: Fabrication Of Superhydrophobic Surfacementioning

confidence: 99%

Section: Fabrication Of Superhydrophobic Surfacementioning

confidence: 99%

Wetting Models and Working Mechanisms of Typical Surfaces Existing in Nature and Their Application on Superhydrophobic Surfaces: A Review

Jiaqiang

Deng

et al. 2017

Adv Materials Inter

115

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decades, researchers have shown great interests in bionics, which was a new multidisciplinary subject inspired by biological characteristics and features to imitate it to build technology devices. [1] With the rise of biomimetic biomaterial researches, a lot of attention was paid on the observation of living organism, especially on plant leaves, such as lotus, rice, taro leaves, etc. [2] As the development of scanning electron microscope (SEM), a wealth of data dealing with SEM of plant surface has been published since 1960s. [3] The cuticular structure was investigated with regard to function, and substances that were secreted onto the cuticle had great effects on the surface properties, while intracuticular waxes were the main barrier to wettability. [4] Some kinds of special wettability like superhydrophobicity and superhydrophilicity were also found in other surfaces, such as self-cleaning lotus leaf, [5] hydrophilicity of red rose petals, [6,7] the anisotropic dewetting behavior on rice leaf, [8,9] hydrophobicity of shark skin, [10] gecko toe, [11] insect wings, [12] etc., and striking superhydrophobic force provided by a water strider's legs, [13] and they were all related to the unique microstructures on their surface. In fact, the special wettability of surfaces is attributed to the interaction of both the surface microstructures and surface covers. As the development and progress of the observation device, smaller nanosized structures were found on the microstructure, and better properties of multiscale hierarchical structure was shown then. [14] Wetting is a phenomenon that solid interface was transferred from solid-gas interface to solid-liquid interface, wettability was a kind of ability that a liquid could be unfolded on one solid surface. The wettability of surface could be characterized by contact angle (CA) of interface. Sliding angle (SA) and contact angle hysteresis were introduced to evaluate the highly valued superhydrophobicity and superhydrophilicity of surfaces. Superhydrophilicity was defied as that of CA was smaller than 5°, superhydrophobicity was defied as that of CA was greater than 150°, as well as a really small sliding angle. It is worth noting that many researchers applied themselves to excavate the theories under the phenomena. Young's equation, Wenzel equation, and Cassie-Baxter equation [15,16] were the representations of hundreds years of research results. Improving and developing Surfaces of plants and animals are evolved to optimal states to accommodate environments better after billions of years of natural selection. As the development of further study on bionics, surfaces with special wetting properties in nature are discovered, extremely related to the micro-/nanostructures on surface. The wetting models and wetting mechanism of several surfaces in nature are investigated, followed by lifting the veil of superhydrophobic field. Various facile, effective, and convenient methods for fabricating superhydrophobic surfaces are obtained and optimized in scientific research and ...

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“…2B, C). Conventional electrospray strategy always involved with very long working distance (about 15-30 cm) for the complete volatilization of the solvent (Kumbar et al, 2007;Su et al, 2016), which always resulted in a low bonding strength between substrate and coating materials. By contrast, in the present study, two strategies had been employed to make the polymer coating tightly depositing on the substrate.…”

Section: Resultsmentioning

confidence: 99%

“…In order to increase the bending strength between the fluoropolymer coating and the substrate, a modified electrospray approach was proposed. Compared with the conventional electrospray process, the working distance set in this study was extremely low and it was only about 5 cm (The working distance was always 15-30 cm during the conventional electrospray process (Kumbar et al, 2007;Su et al, 2016)), which was favor for the deposited particles to bond tightly onto the substrate. The morphology, surface composition and wettable behavior of the SMWM were firstly characterized.…”

Section: Introductionmentioning

confidence: 96%

Simple and fast fabrication of superhydrophobic metal wire mesh for efficiently gravity-driven oil/water separation

Song

2016

Marine Pollution Bulletin

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Fabrication of three-dimensional superhydrophobic membranes with high porosity via simultaneous electrospraying and electrospinning

Cited by 91 publications

References 17 publications

Preparation of electrospun polyurethane/hydrophobic silica gel nanofibrous membranes for waterproof and breathable application

Preparation of electrospun polyurethane/hydrophobic silica gel nanofibrous membranes for waterproof and breathable application

Wetting Models and Working Mechanisms of Typical Surfaces Existing in Nature and Their Application on Superhydrophobic Surfaces: A Review

Simple and fast fabrication of superhydrophobic metal wire mesh for efficiently gravity-driven oil/water separation

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