Fluoroalkylsilane treatment of TiO2 nanoparticles in difference pH values: Characterization and mechanism

Pazokifard, Shahla; Mirabedini, S.M.; Esfandeh, Masoud; Farrokhpay, Saeed

doi:10.1016/j.apt.2012.02.006

Cited by 75 publications

(42 citation statements)

References 27 publications

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“…5 presents the zeta potential ( ) as a function of pH for the different catalysts. For all of them, the zeta potentials are positive for low pH values, which is in accordance with other studies [55,56]. At the isoelectric points where the zeta potential curves cross the zero line the particles have zero charge [55].…”

Section: Characterization Resultssupporting

confidence: 89%

“…Zeta potential value is an appropriate index for electrostatic repulsive interaction between particles. It is generally considered that nanoparticles with the zeta potential values greater than +30 mV or smaller than −30 mV are electrostatically stable [56]. Zeta potential measurement results indicate that pure TiO 2 nanoparticles are stable at pH < 10, while TiO 2 doped with B is stable at pH < 9.6 for 2% (w/w) B and pH < 8.0 for 5% and 9% (w/w) B.…”

Section: Characterization Resultsmentioning

confidence: 94%

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Synthesis and characterization of B-doped TiO2 and their performance for the degradation of metoprolol

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Section: Characterization Resultssupporting

confidence: 89%

Section: Characterization Resultsmentioning

confidence: 94%

Synthesis and characterization of B-doped TiO2 and their performance for the degradation of metoprolol

et al. 2015

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“…The microscope was operated at an accelerating voltage of 160 kV. The sample preparation was initially carried out by dispersing a small amount of the nanoparticles in ethanol using Auto Vortex Mixer (MT19, Chiltern) and ultrasonic bath [29]. Then the prepared suspensions were diluted with ethanol.…”

Section: Characterization Of Treated Tio 2 Nanoparticlesmentioning

confidence: 99%

“…Therefore pH of the media plays an important role in the surface treatment of TiO 2 nanoparticles. In our previously published paper [29], the effect of pH values on TiO 2 treatment with 1H, 1H, 2H-perfluorooctyltriethoxysilane (F1) was investigated. This study aims to examine the effect of silane type along with the pH on hydrophobicity of the nanoparticles via sol-gel reactions.…”

Section: Introductionmentioning

confidence: 99%

“…This has been assigned to movement of hydrophobic nanoparticles towards the coatings' surface during the air drying process. Fluoro-organic and silicone compounds are well known as hydrophobic and lipophobic materials [28] and surface treatment of TiO 2 with these compounds, often through sol-gel method, can alter nanoparticles' surface hydrophilicity [29,30].…”

Section: Introductionmentioning

confidence: 99%

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Surface treatment of TiO2 nanoparticles via sol–gel method: Effect of silane type on hydrophobicity of the nanoparticles

Pazokifard

Farrokhpay

Mirabedini

et al. 2015

Progress in Organic Coatings

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Mechanically Robust Transparent Anti‐Icing Coatings: Roles of Dispersion Status of Titanate Nanotubes

Tang

Silberschmidt

et al. 2018

Adv Materials Inter

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SLIPS (slippery liquid infused porous surface) inspired by nepenthes. [2] However, conventional schemes such as creating a roughened surface with trapped air or lowsurface-energy liquid in order to enhance water repellency and reduce ice adhesion are not sufficient to produce robust antiicing coatings. [3] Water repellency at low temperature and suitable mechanical properties are two principal requirements for the future development of anti-icing coatings. To date, the study of mechanical properties of anti-icing coatings has not been widely reported. Among a few available publications, Wang et al. [4] reported a superhydrophobic steel surface with anti-icing properties. The surface could withstand a peeling test with 3M adhesive tape and abrasion by 400 grid SiC sandpaper with a scratch length of 110 cm. Chen et al. [5] developed an anti-icing coating with a self-lubricating-liquid water layer, the anti-icing layer exhibited low ice-adhesion strength of around 63 ± 11 kPa after ten cycles of an abrasion test with a 10 000 mesh sandpaper. However, some of these mechanical abrasion tests were not carried out following any ISO or ASTM standards, so it becomes difficult to compare and evaluate the claimed results. Menini et al. [6] deposited a poly(tetrafluoroethylene) (PTFE) coating on aluminum alloys and the surface presented iceadhesion strength of ≈100 kPa with good adhesion to substrate according to the ASTM D3359-02 cross-cut test. Huang et al. [7] fabricated an icephobic coating by mixing silica sol and fluorinated acrylate copolymers. The hybrid film exhibited pencil hardness of 4 B and cross-cut adhesion of 0 B. Kimura et al. [8] claimed a new icephobic paint with pencil hardness of 2 H. Mazzola [9] reported an aeronautical livery icephobic coating and compared the nanoindentation results of the coating with those for a commercial coating. Both coatings exhibited a hardness of ≈150 MPa and modulus of ≈4.8 GPa. Sojoudi et al. [10] reported an icephobic bilayer polymer film prepared with initiated chemical vapor deposition (iCVD). The film presented an ice-adhesion strength of ≈150 kPa, a hardness of 479.0 ± 7.0 MPa, and elastic modulus of 19.1 ± 1.2 GPa thanks to its dense structure. Besides mechanical performance, transparency of anti-icing coatings is another essential consideration for applications such as windows, windshields of automobiles, instruments, sensors, cameras, satellites, weapon systems, and photovoltaic devices. Although transparency is very important, transparent anti-icing coatings are seldom reported, except for some commercial antifreeze proteins, liquids, or agents, [11] however, these Ice accretion on automobiles, aerospace components, precision instruments, and photovoltaic devices detrimentally affect their performance and increase the maintenance cost. Despite significant efforts devoted to the investigation of anti-icing coatings in the past decades, mechanically robust and transparent anti-icing coatings are rarely reported. In this study, titanate nanotubes are used as filler to ...

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Fluoroalkylsilane treatment of TiO2 nanoparticles in difference pH values: Characterization and mechanism

Cited by 75 publications

References 27 publications

Synthesis and characterization of B-doped TiO2 and their performance for the degradation of metoprolol

Synthesis and characterization of B-doped TiO2 and their performance for the degradation of metoprolol

Surface treatment of TiO2 nanoparticles via sol–gel method: Effect of silane type on hydrophobicity of the nanoparticles

Mechanically Robust Transparent Anti‐Icing Coatings: Roles of Dispersion Status of Titanate Nanotubes

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