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González-Martı́n, M.L.; Labajos-Broncano, L.; Jańczuk, Bronisław; Bruque, J.M.

doi:10.1023/a:1004767914895

Cited by 62 publications

(27 citation statements)

References 10 publications

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“…The basicity of albite and orthoclase surfaces should most likely be attributed to basic oxygen molecules exposed as a result of an adsorbed layer of an water molecules on the surface of minerals [20,22,43,44]. The energy components for SiO 2 (Merck's plates for planar chromatography) determined by TLW are γ LW = 40.9, γ + = 0.1, and γ − = 62.4 mJ/m 2 [18].…”

Section: Mineralsmentioning

confidence: 99%

“…These results show that calcium carbonate possesses a strong monopolar surface [19]. Li et al [12] determined the surface free energies of the oxide minerals, muscovite, talc, and synthetic hydrotalcite, as [30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45]50, and 31 mJ/m 2 , respectively. Yildirim [22] obtained 48 mJ/m 2 surface energy for Vermont talc using an approximate sessile drop method, while he calculated the surface energy as 24.8 mJ/m 2 with the TLW method; this shows a decrease in contact angle with decreasing particle size.…”

Section: Mineralsmentioning

confidence: 99%

See 1 more Smart Citation

Effect of electrolyte on surface free energy components of feldspar minerals using thin-layer wicking method

Karagüzel

Can

Sönmez

et al. 2005

Journal of Colloid and Interface Science

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Section: Mineralsmentioning

confidence: 99%

Section: Mineralsmentioning

confidence: 99%

Effect of electrolyte on surface free energy components of feldspar minerals using thin-layer wicking method

Karagüzel

Can

Sönmez

et al. 2005

Journal of Colloid and Interface Science

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“…The high wettability of the sintered zirconia was already observed by Yilbas et al [24]. Therefore, the contact angle between water and pure zirconia can be lower than alumina one [25]. Furthermore, a significant increase of the contact angle of zirconia-based ceramics was observed when adding 5 wt.% and 10 wt.% TiO 2 .…”

Section: Wettabilitymentioning

confidence: 66%

Effect of the Compositions on the Biocompatibility of New Alumina–Zirconia–Titania Dental Ceramic Composites

et al. 2020

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Dental implant biomaterials are expected to be in contact with living tissues, therefore their toxicity and osseointegration ability must be carefully assessed. In the current study, the wettability, cytotoxicity, and genotoxicity of different alumina-zirconia-titania composites were evaluated. The surface wettability determines the biological event cascade in the bioceramic/human living tissues interface. The measured water contact angle indicated that the wettability strongly depends on the ceramic composition. Notwithstanding the contact angle variability, the ceramic surfaces are hydrophilic. The cytotoxicity of human gingival fibroblast cells with materials, evaluated by an (3-(4,5 methylthiazol-2-yl)-2,5-diphenyl-tetrazolium bromide (MTT) test, revealed an absence of any cytotoxic effect. A relationship was found between the cell viability and the wettability. It was subsequently deduced that the cell viability increases when the wettability increases. This effect is more pronounced when the titania content is higher. Finally, a comet test was applied as complementary biocompatibility test to detect any changes in fibroblast cell DNA. The results showed that the DNA damage is intimately related to the TiO 2 content. Genotoxicity was mainly attributed to ceramic composites containing 10 wt.% TiO 2 . Our research revealed that the newly developed high performance alumina-zirconia-titania ceramic composites contain less than 10 wt.% TiO 2 , and display promising surface properties, making them suitable for dental implantology applications. of alumina is also its main deficiency. Indeed, the high rate of fractures in various alumina-based implants was reported on by clinical evaluations [6]. Zirconia (ZrO 2 ) ceramics were then introduced in implantology due to their resistance to fracture, their toughness (which is higher than the alumina), and their excellent biocompatibility [7]. However, zirconia bioceramics have a low resistance to ageing due to their transformation from the tetragonal phase (t) to the monoclinic phase (m) in the human body. This transformation is accompanied by an expansion of about 4% to 5% in volume. This volumetric expansion creates compressive stresses resulting in the drop of mechanical performances [8].Up to now, great efforts have been made to produce a new class of dental biomaterials with high mechanical performances. The combination of the high stiffness of alumina and the excellent toughness of zirconia could be an effective strategy [9]. Nevertheless, the previous works on alumina-zirconia ceramic composites revealed complex and high cost manufacturing processes such as hot-press sintering [10].Furthermore, several additives, such as TiO 2 , have been used in order to improve the sintering and enhance the ceramic performances of composites [11]. TiO 2 has also showed excellent bioactivity, promoting the attachment of implants with living bone tissues in a short time [12]. Al 2 O 3 -ZrO 2 -TiO 2 ceramic composites for dental application have recently been developed [13][14][15]...

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“…After depositing the Table 1 Results of XPS investigations, with surface concentrations given in atomic % (at%), for distinct pristine sapphire samples (average values are given) and for these substrates after contact with 2 wt% G50 formulation either for 17 h and then rinsed 45 min (samples G50-17h) or for 27 h and then rinsed 4 h (samples G50-27h) Sample Element G50 layer on top of the sapphire substrate, the contact angle changes from 76.9 ± 1.1° to 72.2 ± 3°. Depending on the surface pre-treatment and the resulting coverage with carbonaceous species, water contact angle values in the range between <5° and 72° were reported for alumina substrates [23,24]. Therefore, the rather high contact angle measured is attributed to surface species which increase the hydrophobicity, e.g.…”

Section: Resultsmentioning

confidence: 99%

Interfactant action of an amphiphilic polymer upon directing graphene oxide layer formation on sapphire substrates

Ureña¹,

Cavalcanti

Soltau³

et al. 2017

Appl Adhes Sci

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Quality assured surface pre-treatment may greatly enhance adhesive interactions and, thus, the performance and durability of material joints. This holds true as well for substrates used in coating processes as for adherents introduced into bonding processes. Wet table polymeric wetting agents—shortly called polymeric interfactants—contribute to modifying surfaces and governing the properties of interphases. This is demonstrated for amphiphilic polymers directing the adsorption of graphene oxide(GO) nano-sheets from aqueous dispersion on alumina surfaces. In this contribution, contact angle measurements as well as X-ray photoelectron spectroscopy and scanning force microscopy investigations are applied for the characterization of thin films. GO is adsorbed either from a buffered dispersion on pristine aluminum oxide surfaces or on alumina modified with a few nanometers thin layer of a polymeric interfactant. Laterally extended nanoparticles and GO nano-sheets are preferentially found on interfactant layers whereas on pristine aluminum oxide smaller adsorbates dominate. The driving forces directing the GO attachment are discussed using a phenomenological model based on polymer/substrate interactions governing the sticking probabilities of GO nano-sheets with different sizes

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Cited by 62 publications

References 10 publications

Effect of electrolyte on surface free energy components of feldspar minerals using thin-layer wicking method

Effect of electrolyte on surface free energy components of feldspar minerals using thin-layer wicking method

Effect of the Compositions on the Biocompatibility of New Alumina–Zirconia–Titania Dental Ceramic Composites

Interfactant action of an amphiphilic polymer upon directing graphene oxide layer formation on sapphire substrates

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