Superhydrophobic palmitic acid modified ZnO nanoparticles

Agrawal, Nikhil; Munjal, Sandeep; Ansari, Mohd Zubair; Khare, Neeraj

doi:10.1016/j.ceramint.2017.07.176

Cited by 64 publications

(26 citation statements)

References 36 publications

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“…Figure 6 shows the WCA obtained for Co, CoF, T_CoF, 2CoF_insitu, 3CoF_in-situ and for CCo, CCoF 0.05 and CCoF 0.2 . If the WCA is equal or higher than 150°, the surface is considered superhydrophobic, but if the WCA is between 90° and 120° the surface is considered hydrophobic [42]. When a drop of water is released onto a raw cotton surface, it is immediately absorbed, and its angle to the surface is considered to be 0° [41].…”

Section: Water Contact Angle Measurementmentioning

confidence: 99%

Superhydrophobic cotton fabrics based on ZnO nanoparticles functionalization

et al. 2019

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In the present work, 100% cotton knitted fabrics were functionalized with ZnO nanoparticles, in order to enhance the hydrophobic properties of the fibers surface. The incorporation methods of ZnO NPs and different types of cotton samples (including polymer coated, and uncoated with and without a nonionic pretreatment) were evaluated, in order to understand the influence in the hydrophobicity values. Cotton fabrics with and without NPs were characterized by ground-state diffuse reflectance, field emission scanning electron microscopy and energy-dispersive spectroscopy, attenuated total reflectance-Fourier transform infrared spectroscopy and water contact angle (WCA). The best results were obtained when the polymer-coated fabric was functionalized using a precursor concentration of 0.2 M, exhibiting superhydrophobic behavior with static WACs of more than 150°. Although pretreated and untreated ZnO-functionalized cotton fabrics had a slightly lower wettability, they showed interesting results, with improvements in WCA from 116° to 143°. In summary, this work demonstrates that the ZnO NPs have a huge potential to be used as surface finishings for the development of easy cleaning fibrous structures.

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Section: Water Contact Angle Measurementmentioning

confidence: 99%

Superhydrophobic cotton fabrics based on ZnO nanoparticles functionalization

et al. 2019

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“…Fabrication of robust, easy to apply, low wettability coatings still remains a major challenge within the research community. Thin films created using functionalized nanoparticles have been shown to possess rough surface textures that show superhydrophobic behaviour [1][2][3][4][5]. Deposition of the nanoparticles onto surfaces has been readily achieved through dipping [3,6] and spraying [2,5], which could make it suitable for use within a variety of different industrial and commercial sectors.…”

Section: Introductionmentioning

confidence: 99%

“…For example, low wettability nanoparticle coatings could assist the removal of corrosive ions in aqueous solutions from metals, prevent cardboard getting wet during transport or storage, and facilitate the quickdrying of plastics. A large variety of nanoparticles have been shown to display this behaviour, such as metal oxides like ZnO [4] and Al2O3 [2,5], SiO2 [1,3], and amorphous [7]. In these reports, the surface energy of metal oxide and SiO2 nanoparticles is lowered through adsorption of suitable carboxylic acids [2,4,5] or alkylsilanes [1,3,8].…”

Section: Introductionmentioning

confidence: 99%

Comparison of hydrophobicity and durability of functionalized aluminium oxide nanoparticle coatings with magnetite nanoparticles–links between morphology and wettability

Hill

Barron

Alexander

2019

Journal of Colloid and Interface Science

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“…The coating demonstrated a water contact angle >160°; however, it became hydrophilic after heating at 230°. This behavior was associated with the thermal degradation of palmitic acid (Agrawal et al, 2017 ). Similarly, porous ZnO nanoparticles prepared by a combustion method were used with copper stearate to prepare a superhydrophobic coating with water contact angle 161°.…”

Section: Separation Of Oil/water Mixturesmentioning

confidence: 99%

Surface Engineering of Ceramic Nanomaterials for Separation of Oil/Water Mixtures

et al. 2020

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Oil/water mixtures are a potentially major source of environmental pollution if efficient separation technology is not employed during processing. A large volume of oil/water mixtures is produced via many manufacturing operations in food, petrochemical, mining, and metal industries and can be exposed to water sources on a regular basis. To date, several techniques are used in practice to deal with industrial oil/water mixtures and oil spills such as in situ burning of oil, bioremediation, and solidifiers, which change the physical shape of oil as a result of chemical interaction. Physical separation of oil/water mixtures is in industrial practice; however, the existing technologies to do so often require either dissipation of large amounts of energy (such as in cyclones and hydrocyclones) or large residence times or inventories of fluids (such as in decanters). Recently, materials with selective wettability have gained attention for application in separation of oil/water mixtures and surfactant stabilized emulsions. For example, a superhydrophobic material is selectively wettable toward oil while having a poor affinity for the aqueous phase; therefore, a superhydrophobic porous material can easily adsorb the oil while completely rejecting the water from an oil/water mixture, thus physically separating the two components. The ease of separation, low cost, and low-energy requirements are some of the other advantages offered by these materials over existing practices of oil/water separation. The present review aims to focus on the surface engineering aspects to achieve selectively wettability in materials and its their relationship with the separation of oil/water mixtures with particular focus on emulsions, on factors contributing to their stability, and on how wettability can be helpful in their separation. Finally, the challenges in application of superwettable materials will be highlighted, and potential solutions to improve the application of these materials will be put forward.

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Superhydrophobic palmitic acid modified ZnO nanoparticles

Cited by 64 publications

References 36 publications

Superhydrophobic cotton fabrics based on ZnO nanoparticles functionalization

Superhydrophobic cotton fabrics based on ZnO nanoparticles functionalization

Comparison of hydrophobicity and durability of functionalized aluminium oxide nanoparticle coatings with magnetite nanoparticles–links between morphology and wettability

Surface Engineering of Ceramic Nanomaterials for Separation of Oil/Water Mixtures

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