Coatings made by sol–gel and chemical nanotechnology

Aegerter, Michel A.; Almeida, Rui M.; Soutar, Andrew M.; Tadanaga, Kiyoharu; Yang, Haoru; Watanabe, Takeru

doi:10.1007/s10971-008-1761-9

Cited by 83 publications

(40 citation statements)

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“…There are two main approaches to generate superhydrophobic surfaces: (i) creation of a rough surface from low surface energy materials and (ii) creation of a rough surface followed by a low surface energy material coating step. Many methods have been developed so far to promote surface roughness, including sol-gel, plasma treatment, electrodeposition, anodisation, hot-water immersion, template method, chemical treatment and lithography [13][14][15][16][17][18][19][20]. Anodic aluminum oxide has been proposed as a suitable industrial process for use in the burgeoning field of nanotechnology [21] for developing nano-pore structure films with advantage of improvement of corrosion and wear resistance [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic and icephobic surfaces prepared by RF-sputtered polytetrafluoroethylene coatings

Jafari

Menini

Farzaneh

2010

Applied Surface Science

196

102

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A superhydrophobic and icephobic surface were investigated on aluminum alloy substrate.Anodizing was used first to create a micro-nano structured aluminum oxide underlayer on the alloy substrate. In a second step, the rough surface was coated with RF-sputtered polytetrafluoroethylene (PTFE or Teflon®). Scanning electron microscopy images showed a "bird's nest"-like structure on the anodized surface. The RF-sputtered PTFE coating exhibited a high static contact angle of ~ 165º with a very low contact angle hysteresis of ~ 3º. X-ray photoelectron spectroscopy (XPS) results showed high quantities of CF 3 and CF 2 groups, which are responsible for the hydrophobic behavior of the coatings. The performance of this superhydrophobic film was studied under atmospheric icing conditions. These results showed that on superhydrophobic surfaces ice adhesion strength was 3.5 times lower than on the polished aluminum substrate.

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Section: Introductionmentioning

confidence: 99%

Superhydrophobic and icephobic surfaces prepared by RF-sputtered polytetrafluoroethylene coatings

Jafari

Menini

Farzaneh

2010

Applied Surface Science

196

102

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“…So, superhydrophobic surfaces can be achieved by a combination of low surface energy materials, and surface micro-and nanostructures. Various approaches have been developed to create superhydrophobic surfaces, such as the sol-gel process, plasma treatment, electrochemical method, template method, vapor deposition, layer-by-layer method, and others [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of superhydrophobic nanostructured surface on aluminum alloy

2010

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A superhydrophobic surface was prepared by consecutive immersion in boiling water and sputtering of polytetrafluoroethylene (PTFE or Teflon®) on the surface of an aluminum alloy substrate. Immersion in boiling water was used to create a micro-nanostructure on the alloy substrate. Then, the rough surface was coated with RF-sputtered Teflon film.The immersion time in boiling water plays an important role on surface morphology and water repellency of the deposited Teflon coating. Scanning electron microscopy images showed a "flower-like" structure in first few minutes of immersion. And as the immersion time lengthened, a "corn-flake" structure appeared. FTIR analyses of Teflon-like coating deposited on water treated aluminum alloy surfaces showed fluorinated groups, which effectively reduce surface energy. The Teflon-like coating deposited on a rough surface achieved with five-minute immersion in boiling water, provided a high static contact angle (~164 º) and low contact angle hysteresis (~4 º).

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“…The epoxy and amine groups in the two molecules could also possibly react to form an epoxy-amine system in addition to sol-gel formation. 4.72 g of GCPTS and 2.22 g of TMSPED were initially added to 5 mL of solvent. The solvent (purchased from VWR international ® , Batavia, IL, USA, Cat No.…”

Section: Sol-gel Formulationmentioning

confidence: 99%

“…In the past, organic (as well as organic-inorganic (hybrid)) coatings have been designed with synergistic properties [3]. Numerous functional properties, such as corrosion protection, controlled porosity, anti-reflection, electrochromic, self-cleaning, anti-fogging, superhydrophobicity, and superhydrophilicity have been achieved using sol-gel routes, with applications including coatings for architectural, automotive, electronics, controlled drug release, orthopedic implant, and protection of cultural heritage [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Silica-Based Sol-Gel Coating on Magnesium Alloy with Green Inhibitors

et al. 2017

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Abstract:In this work, the performances of several natural organic inhibitors were investigated in a sol-gel system (applied on the magnesium alloy Mg AZ31B substrate). The inhibitors were quinaldic acid (QDA), betaine (BET), dopamine hydrochloride (DOP), and diazolidinyl urea (DZU). Thin, uniform, and defect-free sol-gel coatings were prepared with and without organic inhibitors, and applied on the Mg AZ31B substrate. SEM and EDX were performed to analyze the coating surface properties, the adhesion to the substrate, and the thickness. Electrochemical measurements, including electrochemical impedance spectroscopy (EIS) and anodic potentiodynamic polarization scan (PDS), were performed on the coated samples to characterize the coatings' protective properties. Also, hydrogen evolution measurement-an easy method to measure magnesium corrosion-was performed in order to characterize the efficiency of coating protection on the magnesium substrate. Moreover, scanning vibrating electrode technique (SVET) measurements were performed to examine the efficiency of the coatings loaded with inhibitors in preventing and containing corrosion events in defect areas. From the testing results it was observed that the formulated sol-gel coatings provided a good barrier to the substrate, affording some protection even without the presence of inhibitors. Finally, when the inhibitors' performances were compared, the QDA-doped sol-gel was able to contain the corrosion event at the defect.

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Coatings made by sol–gel and chemical nanotechnology

Cited by 83 publications

References 0 publications

Superhydrophobic and icephobic surfaces prepared by RF-sputtered polytetrafluoroethylene coatings

Superhydrophobic and icephobic surfaces prepared by RF-sputtered polytetrafluoroethylene coatings

Fabrication of superhydrophobic nanostructured surface on aluminum alloy

Silica-Based Sol-Gel Coating on Magnesium Alloy with Green Inhibitors

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