Chemical functionalization of ceramic tile surfaces by silane coupling agents: polymer modified mortar adhesion mechanism implications

Mansur, Alexandra A.P.; Nascimento, Otávio Luiz do; Vasconcelos, Wander L.

doi:10.1590/s1516-14392008000300011

Cited by 42 publications

(23 citation statements)

References 20 publications

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“…These indicate higher wettability of these solid supports when compared with the 3-APTES and 3-GPTMS-modified surfaces that presented contact angles of 69 ± 3° and 57 ± 4°, respectively. The measured values are in agreement with published reports on alkylsilanes as modifiers [27,28], and they can be explained based on the hydrophobic characteristic of propyl spacer of 3-APTES and 3-GPTMS organosilanes. In addition, the slightly higher hydrophilic behavior observed for 3-GPTMS-modified steel may be associated to the number of hydrogen bonds that could be established between the water droplet and the organofunctional group, as shown in Fig.…”

Section: Characterization Of Functionalized Steel Substratesupporting

confidence: 91%

Fusion-bonded epoxy composite coatings on chemically functionalized API steel surfaces for potential deep-water petroleum exploration

et al. 2015

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Corrosion of oil and gas pipelines significantly reduces the service life of the pipelines, thus increasing costs, and more seriously, it can cause catastrophic environmental accidents. More recently, the exploitation of oil in ultra-deep seawater fields is facing new technological challenges in material selection owing to the extreme production conditions. Thus, the development of organic coatings as protective layers for steel pipelines is of crucial importance against highly corrosive environments. In this work, fusion bonded epoxy (FBE) coatings were deposited onto chemically functionalized carbon steel surfaces with organosilanes to investigate the potential applications in protection against corrosion and degradation in harsh marine environments. Carbon-steel API 5L X42 (American Petroleum Institute Standard grade) was chemically functionalized with two organosilanes, 3-APTES [(3-Aminopropyl)triethoxysilane], and 3-GPTMS [(3-Glycidyloxypropyl)trimethoxysilane], followed by the deposition of FBE composite coatings. The systems were extensively characterized with respect to each component as well as the steel-coating interface. The contact angle measurements and Fourier transform infrared spectroscopy (FTIR) results clearly indicated that the steel surface was effectively modified by the functional amine and glycidyl silane groups, leading to the formation of interfacial covalent bonds with increased hydrophobicity compared to bare steel surfaces. In addition, the morphological and chemical characterizations of FBE by scanning electron microscopy, atomic force microscopy, X-ray diffraction, and FTIR showed that it is composed of an epoxy-based organic matrix of bisphenol-A diglycidyl ether (DGEBA) reinforced with uniformly dispersed inorganic phases of calcium silicates and TiO 2 particles. Moreover, the chemical functionalization of the steel surfaces with amino and glycidyl silanes significantly altered the interfacial forces with the FBE coatings, resulting in higher adhesion strength for 3-APTES-modified steel compared to 3-GPTMS-steel; however, both mostly showed cohesive rupture mode in the FBE component.

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Section: Characterization Of Functionalized Steel Substratesupporting

confidence: 91%

Fusion-bonded epoxy composite coatings on chemically functionalized API steel surfaces for potential deep-water petroleum exploration

et al. 2015

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“…Rodríguez et al have pointed out that these bands belong to C\O\C bond and wagging vibrations of methyl groups of the silane A-174 chemical structure [33]. Interestingly, a band located at 1566 cm −1 was also observed in these samples; this band could be related to carboxylate group formed during silanization process through reaction between acetic acid and calcium ions of HA structure [34]. The peaks that appear close to 2400 cm −1 after silanization process are associated to carbon dioxide.…”

Section: Ftirmentioning

confidence: 89%

Towards optimization of the silanization process of hydroxyapatite for its use in bone cement formulations

Cisneros-Pineda

Kao

Loría‐Bastarrachea

et al. 2014

Materials Science and Engineering: C

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“…In all cases, it was observed an increase on the mechanical properties, but the mechanism of interaction was not deeply investigated. The authors of the present study have published articles that demonstrate the increase of adherence resistance between tiles and modified mortar as a consequence of ceramic tile surface modification with silanes bearing different functionalities 10–11…”

Section: Introductionmentioning

confidence: 88%

A Total Synthesis of Spirastrellolide A Methyl Ester

Andrejew

Benson

Schulthoff

et al. 2013

Chemistry A European J

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A concise total synthesis of spirastrellolide A methyl ester (1 a, R(1) =Me) as the parent compound of a series of highly cytotoxic marine macrolides is disclosed, which exploits and expands the flexibility of a synthesis plan previously developed by our group en route to the sister compound spirastrellolide F methyl ester (6 a, R(1) =Me). Key to success was the masking of the signature Δ(15,16) -bond of 1 a as a C16-carbonyl group until after the stereogenic center at C24 had been properly set by a highly selective hydrogenation of the C24 exo-methylene precursor 66. Conformational control over the macrocyclic frame allowed the proper stereochemical course to be dialed into this reduction process. The elaboration of the C16 ketone to the C15-C16 double bond was accomplished by a chemoselective alkenyl triflate formation followed by a palladium-catalyzed hydride delivery. The role of the ketone at C16 as a strategic design element is also evident up-stream of the key intermediate 66, the assembly of which hinged upon the addition of the polyfunctionalized dithiane 37 to the similarly elaborate aldehyde fragment 46. Other crucial steps of the total synthesis were an alkyl-Suzuki coupling and a Yamaguchi lactonization that allowed the Northern and the Southern sector of the target to be stitched together and the macrocyclic perimeter to be forged. The lateral chain comprising the remote C46 stereocenter was finally attached to the core region by a modified Julia-Kocienski olefination. The preparation of the individual building blocks led to some methodological spin-offs, amongst which the improved procedure for the N-O-bond cleavage of isoxazolines by zero-valent molybdenum and the ozonolysis of a double bond in the presence of other oxidation-prone functionality are most noteworthy. Preliminary biological data suggest that the entire carbon framework, that is the macrocyclic core plus the lateral chain, might be necessary for high cytotoxicity.

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Chemical functionalization of ceramic tile surfaces by silane coupling agents: polymer modified mortar adhesion mechanism implications

Cited by 42 publications

References 20 publications

Fusion-bonded epoxy composite coatings on chemically functionalized API steel surfaces for potential deep-water petroleum exploration

Fusion-bonded epoxy composite coatings on chemically functionalized API steel surfaces for potential deep-water petroleum exploration

Towards optimization of the silanization process of hydroxyapatite for its use in bone cement formulations

A Total Synthesis of Spirastrellolide A Methyl Ester

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