Investigation of the stability in emulsions stabilized with different surface modified titanium dioxides

Stiller, Stefan; Gers‐Barlag, H.; Lergenmueller, M.; Pflücker, F.; Schulz, Jens; Wittern, Klaus‐Peter; Daniels, Rolf

doi:10.1016/j.colsurfa.2003.11.003

Cited by 125 publications

(70 citation statements)

References 15 publications

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“…[1] To prevent separation, surfactants are usually added whose molecules cover the liquid-liquid interfaces. Recently, [2][3][4][5] it has been shown that certain solid nanoparticles act as excellent emulsifiers alone and, since particles are more strongly attached to interfaces, coalescence is absent. However, different types of particles are needed to prepare either oil-in-water (o/w) or water-in-oil (w/o) emulsions in mixtures containing equal volumes of the two liquids.…”

mentioning

confidence: 98%

Inversion of Emulsions Stabilized Solely by Ionizable Nanoparticles

2004

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confidence: 98%

Inversion of Emulsions Stabilized Solely by Ionizable Nanoparticles

2004

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“…Compared with the emulsion E1, emulsion E2 has a wide droplet size distribution, and with the increase of high and low temperature treatment time, droplet size distribution becomes a bimodal distribution, which shows that Emulsion E1 has a higher stability than E2. 26 Sun-screening performances of Emulsion E1 and E2 were tested by UV-2000 and shown in Figure 10 and 11, respectively. From the data of emulsion E1 in Figure 10, three sets of data are almost coincident, which indicates that emulsion E1 is evenly daubed on the PMMA.…”

Section: Tz-xmentioning

confidence: 99%

Surface Treatment of Broad-Spectrum Ultraviolet Light Shielding Titania/Zinc Oxide Composites and Their Applications in Sunscreens

Li¹,

Yao²,

Zuo³

et al. 2017

Nano Adv

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Nano-titanium oxide (TiO 2 ) and zinc oxide (ZnO) are widely used in sunscreen products, but many shortcomings for these both oxides still exist. In this paper, the hydrolysis of tetraethyl orthosilicate (TEOS) in ethanol solution was used to deposit inorganic silica nano-coating on the surface of TiO 2 /ZnO composite, followed by grafting by organosilane. The as-prepared products were characterized by XRD, FTIR, TG and TEM. In addition, Zeta potential, color difference test, dissolution experiments of zinc ions and water contact angle tests were used to characterize the effect of inorganic silica coating and organosilane grafting. Subsequently, the modified TiO 2 /ZnO composites were applied into the sunscreen formulation and the properties of the as-prepared emulsions were evaluated by the distribution analysis of the particle size, acceleration test and ultraviolet transmittance analyzer. The results showed that the sunscreen emulsion prepared by the TiO 2 /ZnO composite has better sun protection performance and stability than the emulsion prepared by the mixture of TiO 2 and ZnO.

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“…Therefore, to be used in sunscreens, inorganic compounds such as titanium dioxide and zinc oxide must be present at a controlled size, 13 to promote more efficient uniform protection against UV radiation, to prevent visible light scattering 14 and hence many of them have surface modifiers 15,16 to impede aggregation 11 of the particles caused by electrostatic effects. Examples of surface modifiers are dimethicone, silica, 12 alumina, aluminum stearate, 11 aluminum oxide, simethicone, stearic acid, 15 solid lipid microparticles, 3 and polyaspartic acid. 16 Recently, we demonstrated the efficiency of p-toluene sulfonic acid (PTSH) to control the size, shape, and aggregation of TiO 2 nanoparticles obtained by the sol-gel process.…”

Section: Manaia Et Almentioning

confidence: 99%

Multifunction hexagonal liquid-crystal containing modified surface TiO2 nanoparticles and terpinen-4-ol for controlled release

Manaia¹,

Kaminski²,

Oliveira³

et al. 2015

IJN

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Multifunctional products have been developed to combine the benefits of functional components and terpinen-4-ol (TP) delivery systems. In this way, p-toluene sulfonic acid modified titanium dioxide (TiO 2 ) nanoparticles and TP, an antioxidant, have been incorporated in liquid-crystalline formulations for photoprotection and controlled release of the TP, respectively. By X-ray powder diffraction and diffuse reflectance spectroscopy, we noted that using p-toluene sulfonic acid as a surface modifier made it possible to obtain smaller and more transparent TiO 2 nanoparticles than those commercially available. The liquid-crystalline formulation containing the inorganic ultraviolet filter was classified as broad-spectrum performance by the absorbance spectroscopy measurements. The formulations containing modified TiO 2 nanoparticles and TP were determined to be in the hexagonal phase by polarized light microscopy and small-angle X-ray scattering, which makes possible the controlled released of TP following zero-order kinetics. The developed formulations can control the release of TP. Constant concentrations of the substance have been released per time unit, and the modified TiO 2 nanoparticles can act as a transparent inorganic sunscreen.

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Investigation of the stability in emulsions stabilized with different surface modified titanium dioxides

Cited by 125 publications

References 15 publications

Inversion of Emulsions Stabilized Solely by Ionizable Nanoparticles

Inversion of Emulsions Stabilized Solely by Ionizable Nanoparticles

Surface Treatment of Broad-Spectrum Ultraviolet Light Shielding Titania/Zinc Oxide Composites and Their Applications in Sunscreens

Multifunction hexagonal liquid-crystal containing modified surface TiO2 nanoparticles and terpinen-4-ol for controlled release

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