Inorganic–organic hybrid coatings with mixed metal oxides

Ballard, R. L.; Williams, Jonathan P.; Njus, Jeffrey M.; Kiland, B.R; Soucek, Mark D.

doi:10.1016/s0014-3057(00)00105-1

Cited by 68 publications

(26 citation statements)

References 22 publications

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“…[1][2][3][4][5] Among the papers published about this subject, it appears that the majority of the work performed particularly concerns composites of poly(methyl methacrylate) (PMMA) and oxide ceramic filler. [6][7][8] PMMA is an optically clear amorphous thermoplastic. It is widely used as a substitute for inorganic glass, because it shows higher impact strength and undergoes ductile rather than brittle fracturing.…”

Section: Introductionmentioning

confidence: 99%

Effect of ZnO on the Thermal Degradation Behavior of Poly(Methyl Methacrylate) Nanocomposites

Japić

Marinšek

Orel

2016

ACSi

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In the memory of Janez (Janko) Jamnik our dear friend and co-worker. AbstractThe influence of ZnO nanoparticles on the thermal degradation behavior of poly(methyl methacrylate) (PMMA) was tested using thermoanalytical techniques. The studied materials were investigated using TG, DTA, EGA, XRD, SEM and TEM. The ZnO nanoparticles were synthesized via precipitation by adding LiOH into Zn 2+ water/ethylene glycol solutions. The ZnO-PMMA nanocomposites were prepared by adding the appropriate amount of ZnO into MMA and subsequent MMA radical polymerization. According to the experimental results and model-free isoconversional activation energy calculations, the addition of ZnO into PMMA played a double role. The ZnO concentrations up to 0.15% stabilized the composite by shifting the degradation interval toward higher temperatures and increasing the apparent activation energy relative to pure PMMA. At higher concentrations, the catalytic effect of ZnO started to prevail and was reflected in the lower temperature intervals of intense PMMA degradation and lower apparent activation energy. The addition of ZnO generally did not change the nature of the PMMA decomposition process.

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Section: Introductionmentioning

confidence: 99%

Effect of ZnO on the Thermal Degradation Behavior of Poly(Methyl Methacrylate) Nanocomposites

Japić

Marinšek

Orel

2016

ACSi

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“…This value of thickness is comparable (10-12 µm) to the ones measured for anti-corrosion organic-inorganic hybrid silane sol-gel coatings prepared using N- propyl]ethylenediamine, 3-aminopropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, and 3-methacryloxypropyl-trimethoxysilane on aluminum and iron plates 23 . However, the thicknesses obtained for the deposited coatings, by sol-gel, were lower than both the thickness obtained using aminosilane-epoxy deposited on AA2024-T3 and epoxysilane-epoxy on AA7075-T6 (30-50 µm) [24] and to the ceramer coatings developed using soybean oil as the organic phase with mixtures of titanium isopropoxide and zirconium propoxide as the inorganic phase (45-95 µm) [25] . The thickness was also lower than the 30 µm observed for an Al 2 D 3 protective coating synthesized by direct sol-gel process on magnesium alloy AZ31 [26] .…”

Section: Physical Characterizationmentioning

confidence: 73%

Environmentally friendly sol - gel-based anticorrosive coatings on aluminum alloy 2024

et al. 2013

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Chromate coatings used as corrosion protection technologies for aluminum alloys are environmentally harmful and extremely toxic. This paper presents an investigation on the deposition of environmentally friendly cerium oxide-based anticorrosive coatings on aluminum alloy 2024 substrates by the sol-gel method. The influence of the calcination temperature on both the microstructural characteristics and the electrochemical corrosion performance was tested using scanning electron microscopy, X-ray diffraction, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS), before and after, periods of immersion in saline corrosive solutions. The ceramic coatings synthesized at 200, 300 and 400 °C showed very resistive behaviors leading to both an efficient passivation of the alloy surfaces and good corrosion protection. This passivation was maintained for 30 days of immersion in saline solutions, as well as, when aggressive electrochemical polarization experiments (until 2.0 V versus saturated calomel electrode) were used. Very high resistances for the charge transfer (0.14-0.28 GΩ) and very low current density values (5 × 10 -14 -5 × 10 -11 A cm -2 ) were estimated by EIS and potentiodynamic polarization, respectively, for coatings prepared at 200-400 °C. Thus, the coatings prepared in this study by the sol-gel method appear as an efficient treatment for the corrosion protection of aluminum alloys.

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“…Sol-gel coatings, particularly those that incorporate an organic functionality, can provide thick coating, enabling them to store suffi cient volume of active corrosion inhibitor [55]. Th ere are an enormous number of possibilities here, which have been reviewed elsewhere [56,57]. Briefl y, organic-substituted silicic acid esters of the type R' n Si(OR) 4-m can be polymerized or reacted with metal alkoxides of the type M(OR) m-n (LZ) n , where L has an anchoring function and Z is a general organic group [57].…”

Section: Inhibitor Encapsulation: From Nanocontainers To Micellesmentioning

confidence: 99%

Designing green, self-healing coatings for metal protection

et al. 2010

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Metals are used extensively in modern society in a range of applications from infrastructure to aircraft to consumer products. The protection of metals, primarily from corrosion, has been an active area of materials science for many years. However, over the last 20 years, changing regulations governing both environmental issues and human health have driven even greater activity in this fi eld. Addressing these regulatory changes presents some of the most exciting challenges in materials science. This review looks at current metal protection schemes, exploring the development of 'green' inhibitors and 'self-healing' paint fi lms that have inbuilt capacity to maintain functionality. Inorganic and organic materials science has undergone rapid development in recent decades and this review looks at how some of those developments, particularly in encapsulation and polymer healing, can be applied to the design of new protective paint systems.

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Inorganic–organic hybrid coatings with mixed metal oxides

Cited by 68 publications

References 22 publications

Effect of ZnO on the Thermal Degradation Behavior of Poly(Methyl Methacrylate) Nanocomposites

Effect of ZnO on the Thermal Degradation Behavior of Poly(Methyl Methacrylate) Nanocomposites

Environmentally friendly sol - gel-based anticorrosive coatings on aluminum alloy 2024

Designing green, self-healing coatings for metal protection

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