Semiconductor‐assisted self‐cleaning polymeric fibers based on zinc oxide nanoparticles

Moafi, Hadi Fallah; Shojaie, Abdollah Fallah; Zanjanchi, Mohammad Ali

doi:10.1002/app.34179

Cited by 18 publications

(10 citation statements)

References 39 publications

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“…Silicon fluoride compounds were often used to modify surface energy of samples. Sol–gel method is always cooperated to coating and deposition process . Sol–gel synthesis in combination with micromolding as an example of a soft lithographic technique was used to prepare micropatterned films of the Li‐ion conducting perovskite‐type phase with nominal composition Li 0.29 La 0.57 TiO 3 on silicon substrate .…”

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

109

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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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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

109

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“…It is highly desirable to develop simple, low-cost and low-temperature processes for controllable synthesis of photocatalytic active ZnO nanostructures on alternative substrates [28,29].Self-cleaning polymeric fibers have been successfully prepared by depositing ZnO nanoparticle onto wool and polyacrylonitrile (PAN) fibers with good compatibility and significant photocatalytic self-cleaning activity using the sol-gel process at ambient temperature [30].…”

Section: Introductionmentioning

confidence: 99%

Polypropylene nonwoven filter with nanosized ZnO rods: Promising hybrid photocatalyst for water purification

Colmenares

Kuna

Jakubiak

et al. 2015

Applied Catalysis B: Environmental

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“…Among these materials, ZnO belongs to n ‐type semiconductor with wide band gap of 3.37 eV, large exciton binding energy of 60 meV at room temperature. Because of these characteristics, ZnO has wide applications in the fields of photonic devices, gas sensors, solar cells, ceramics, and transducers . When ZnO is doped with transition metals, it displays various applications including n ‐type nanolaser, ferromagnetic semiconducting nanomaterials, and so forth .…”

Section: Introductionmentioning

confidence: 99%

Structural, electrical, thermal, and gas sensing properties of new conductive blend nanocomposites based on polypyrrole/phenothiazine/silver‐doped zinc oxide

Ramesan

Greeshma

Parvathi

et al. 2019

Vinyl Additive Technology

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The main aim of this study is to investigate the effect of silver-doped zinc oxide (Ag-ZnO) loading on the structural, morphological, thermal and electrical properties, and gas sensing behavior of polypyrrole (PPy)/phenothiazine (PTZ)-blend nanocomposites. The composites are characterized by FTIR, XRD, SEM, TEM, DSC, TGA, and impedance studies. FTIR spectra exhibit the presence of Ag-ZnO in the PPy/PTZ blend. XRD analysis shows that the semicrystalline behavior of the polymer blend is greatly enhanced by the addition of Ag-doped ZnO particles. Uniform dispersion of nanoparticles in the polymer is obtained from SEM analysis. The TEM images confirm the presence of spherically shaped nanoparticles in PPy/PTZ blend with a size of 10-25 nm. The DSC measurement indicates that the glass transition temperature of PPy/PTZ blend was significantly improved in the presence of Ag-doped ZnO nanoparticles. The thermal decomposition temperature of nanocomposite obtained from TGA shows an increase with increase in the content of Ag-ZnO particles. The incorporation of Ag-doped ZnO nanoparticles to PPy/PTZ blend exhibit increase in the AC conductivity and dielectric properties of the nanocomposite, due to the pilling of charges at the extended interface of the composite system. The DC conductivity of the nanocomposite increases with the loading of nanoparticles. The ammonia gas sensing performance of PPy/PTZ/Ag-ZnO nanocomposite is analyzed, and the result shows that the fabricated blend composite can be used as a promising candidate for the easy access of gas molecules. Intensity (counts) FIG. 2. XRD patterns of Ag-doped ZnO, PPy/PTZ blend with different contents of Ag-doped ZnO. PPy-PTZ PPy-PTZ/ 5 wt % Ag-ZnO PPy-PTZ/ 7 wt % Ag-ZnO PPy-PTZ/ 10 wt % Ag-ZnO PPy-PTZ/ 15 wt % Ag-ZnO Tan Log frequency (Hz) FIG. 9. Dielectric loss tangent versus frequency plots for PPy/PTZ blend with Ag-doped ZnO nanoparticles. [Color figure can be viewed at wileyonlinelibrary.com]

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Semiconductor‐assisted self‐cleaning polymeric fibers based on zinc oxide nanoparticles

Cited by 18 publications

References 39 publications

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

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

Polypropylene nonwoven filter with nanosized ZnO rods: Promising hybrid photocatalyst for water purification

Structural, electrical, thermal, and gas sensing properties of new conductive blend nanocomposites based on polypyrrole/phenothiazine/silver‐doped zinc oxide

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