Quantification of surface hydroxides using chemical labeling and XPS

Dang, Tuan A.; Gnanasekaran, R.; Deppe, Denise D.

doi:10.1002/sia.740180214

Cited by 16 publications

(6 citation statements)

References 6 publications

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“…Degradation of the silane coupling layer is also considered to be an important factor for deterioration of CAD/CAM resin composites. Water molecules likely enter the silane-treated layers and gradually hydrolyze the siloxane bonds between the fillers and water molecules, hydrating the resultant hydroxysilyl group [19,34,35].…”

Section: Discussionmentioning

confidence: 99%

Quantitative evaluation of the degradation amount of the silane coupling layer of CAD/CAM resin composites by water absorption

Lee

Imazato

2023

J Prosthodont Res

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Computer-aided design/computer-aided manufacturing (CAD/ CAM) systems have been widely used in dentistry [1][2][3] since the first dental CAD/CAM restoration was reported in the 1980s [4,5]. CAD/ CAM resin composites consist of a matrix resin and inorganic fillers treated with a silane coupling agent [6][7][8]. The matrix resin forms the basis of the composite structure and is composed of organized methacrylate-derived polymers, such as urethane dimethacrylate (UDMA), bisphenol A-glycidyl methacrylate, or triethylene glycol dimethacrylate (TEGDMA) [7]. Inorganic fillers, which are commonly made of silica, zirconia, and alumina, can be used to reinforce the composite structure because of their excellent mechanical properties [9][10][11]. For CAD/CAM resin composites, 0.1 μm or smaller nanofillers composed of chemically stable inorganic materials are often used to improve the mechanical properties and provide polishabil-ity to create a smooth surface [12][13][14][15][16]. Because inorganic fillers are chemically stable, surface modification using silane coupling agents is required to adhere the fillers to the organic matrix resin [17][18][19]. γ-Methacryloyloxypropyl trimethoxysilane (γ-MPTS) is a typical silane coupling agent, and it forms a 1.9-3.0-nm-thick layer between fillers and the matrix resin [20,21].Water ingress leads to hydrolytic breakdown of the bonds between the silane and filler particles [22,23]. This water-induced degradation negatively affects the restoration longevity and mechanical properties [6,[22][23][24][25]. While degradation of silane coupling layers has been qualitatively reported, the quantitative details have not been revealed because arbitrary control of the silane coupling ratio of the filler is not possible with conventional in vitro tests.Rigorous mathematical theories of homogenization have been proposed for quantitative analysis of composite materials [26][27][28]. These theories assume that the material properties are periodic functions of the micro-scale variables, where the period is very small compared with the macro-scale variables. With this assumption, the equivalent macro-scale material properties can be calculated from known or arbitrary micro-scale properties. In dentistry, in silico homogenization analysis has been used to investigate multi-factorial J Prosthodont Res. 2021; **(**):

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Section: Discussionmentioning

confidence: 99%

Quantitative evaluation of the degradation amount of the silane coupling layer of CAD/CAM resin composites by water absorption

Lee

Imazato

2023

J Prosthodont Res

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“…Oxygen, silicon, potassium and aluminum concentrations were lowest at grazing angle with subsequent increase and stabilization toward the deeper region, which mainly represents the bulk mica composition. However, as discussed in the introduction, for multifunctional chlorosilane derivatization, intermolecular crosslinking can occur [18,46], which is seen as an excess signal of fluorine. Before rinsing, nearly the same high amount of fluorine is introduced by the derivatization, independent of the silanol-enriching water vapor plasma treatment (see Fig.…”

Section: Surface Characterization Of Mica After Water Vapor Plasma Treatmentmentioning

confidence: 99%

“…For a correct quantification of the hydroxyl surface density, the usage of monofunctional silanes is imperative, as they are the only ones capable of selectively reacting 1:1 with an OH-activated mica surface [45]. Diand trifunctional silanes bear the possibility of multi dentate chemisorption or undesired intermolecular cross-linking, leading to an ill-defined vertical multilayering and polycondensate of organosilanes [17,40,42,44,46,47]. Compared to a solution-based derivatization, performing the derivatization reaction in the gas phase is applicable to a broader range of substrates [44].…”

Section: Introductionmentioning

confidence: 99%

Optimization of mica surface hydroxylation in water vapor plasma monitored by optical emission spectroscopy

Rupper

Amberg

Hegemann

et al. 2020

Applied Surface Science

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“…The structure of APTES has been determined on glass, gold and aluminium oxide (Vandenberg et al ., 1991). Coupling of APTES and other silanes is dependent on the availability of hydroxyl moieties on the surface (Eaton, 1980; Plueddemann, 1982; Dang & Gnanasekaran, 1990; Vandenberg et al ., 1991; Dang et al ., 1992). The type of surface coverage obtained with APTES on glass is highly dependent on the method used to prepare and prime the surface (Vandenberg et al ., 1991).…”

Section: Introductionmentioning

confidence: 99%

Adhesion of microbes using 3‐aminopropyl triethoxy silane and specimen stabilisation techniques for analytical transmission electron microscopy

Taylor

Webb

Barry

et al. 2000

Journal of Microscopy

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SummaryA variety of adhesive support-®lms were tested for their ability to adhere various biological specimens for transmission electron microscopy. Support ®lms primed with 3-amino-propyl triethoxy silane (APTES), poly-L-lysine, carbon and ultraviolet-B (UV-B)-irradiated carbon were tested for their ability to adhere a variety of biological specimens including axenic cultures of Bacillus subtilis and Escherichia coli and wild-type magnetotactic bacteria. The effects of UV-B irradiation on the support ®lm in the presence of air and electrostatic charge on primer deposition were tested and the stability of adhered specimens on various surfaces was also compared. APTES-primed UV-Birradiated Pioloform TM was consistently the best adhesive, especially for large cells, and when adhered specimens were UV-B irradiated they became remarkably stable under an electron beam. This assisted the acquisition of in situ phase-contrast lattice images from a variety of biominerals in magnetotactic bacteria, in particular metastable greigite magnetosomes. Washing tests indicated that specimens adhering to APTES-primed UV-B-irradiated Pioloform TM were covalently coupled. The electron beam stability was hypothesised to be the result of mechanical strengthening of the specimen and support ®lm and the reduced electrical resistance in the specimen and support ®lm due to their polymerization and covalent coupling.

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Quantification of surface hydroxides using chemical labeling and XPS

Cited by 16 publications

References 6 publications

Quantitative evaluation of the degradation amount of the silane coupling layer of CAD/CAM resin composites by water absorption

Quantitative evaluation of the degradation amount of the silane coupling layer of CAD/CAM resin composites by water absorption

Optimization of mica surface hydroxylation in water vapor plasma monitored by optical emission spectroscopy

Adhesion of microbes using 3‐aminopropyl triethoxy silane and specimen stabilisation techniques for analytical transmission electron microscopy

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