Novelty Cosmetic Filters Based on Nanomaterials Composed of Titanium Dioxide Nanoparticles

Abstract

The following work describes the synthesis of new physical filters based on TiO2/SiO2 and TiO2/Ag nanostructures. Titanium dioxide nanoparticles (TiO2 NPs) were applied as control material and a popular physical UV filter. The advantage of using materials on the nanometer scale is the elimination of the skin whitening effect that occurs when using photoprotective cosmetics containing titanium dioxide on a macro scale. In addition, the silica coating makes the material less harmful, and the silver coating enriches the material with antibacterial properties. Nanoparticles and nanostructures have been characterized by Energy Dispersive X-Ray Analysis (EDX), the Scanning Electron Microscope (SEM), Transmission Electron Microscopy (TEM), and Fourier-Transform Infrared Spectroscopy (FT-IR) methods. Due to the use of physical filters in anti-radiation protection cosmetics, water-in-oil (W/O) emulsion has been prepared. All cosmetic formulations have been tested for stability. The sun protection research with the Sun Protection Diagnostic SP37 was carried out. These studies made it possible to determine the natural sun protection time and to compare the synthesized materials. Furthermore, one of the most important parameters when describing this type of cosmetic is water resistance, which has also been measured. The results show that the new type of material of TiO2/Ag used as a new physical filter in emulsion W/O shows the best sun protection compared with other obtained nanomaterials. It is most likely due to the improved optical properties of the combination of noble metals, for example, silver with TiO2.

A Survey of UV Filters Used in Sunscreen Cosmetics

“…Titanium dioxide (TiO 2 ) is an inorganic UV filter present as both nano (22.0%) and micro (28%) forms in child sunscreens. Titanium oxide is considered a more photochemically stable and less skin irritating filter than most organic filters, but it can generate reactive oxygen species (ROS) when exposed to UV radiation, leading to potential adverse effects [53][54][55]. Therefore, since 2019, titanium dioxide can only be used as a nanomaterial when coated with inert shells like silica, hydrated silica, alumina, aluminium hydroxide, aluminium stearate, stearic acid, trimethoxycaprylylsilane, dimethicone or simethicone, or with some combinations thereof (Annex VI, Regulation No.…”

Nanotechnology-Enhanced Cosmetic Application of Kojic Acid Dipalmitate, a Kojic Acid Derivate with Improved Properties

“…The integration of nanotechnology into cosmetic formulations is regarded as the most current and developing technology currently accessible [105]. Cosmetic producers use nanoscale compounds to enhance UV protection [109][110][111][112], facilitate deeper skin penetration [113][114][115][116][117], prolong the effects [118,119], intensify color [120,121], improve finish quality [121], stability [118,122], and provide lower toxicity [87,115]. Kojic acid dipalmitate has been widely utilized in the cosmetics industry.…”

Medical Applications of Silver and Gold Nanoparticles and Core‐Shell Nanostructures Based on Silver or Gold Core: Recent Progress and Innovations

“…Moreover, it is known that metallic NPs coated with silica do not lose their unique properties. [176,177] The properties of the core are influenced, among others, by the thickness and porosity of the shell. Taking into account scientific reports, it was found that a thin and homogenous silica coating on the surface of core-shell nanostructures provides colloidal stability to the nanocomposite without disturbing their properties.…”

“…Silica used as a coating in nanostructures primarily reduces the potential toxicity of the nanomaterial and makes it more biocompatible, which is important considering its subsequent applications in the medical industry. Moreover, it is known that metallic NPs coated with silica do not lose their unique properties [176,177] . The properties of the core are influenced, among others, by the thickness and porosity of the shell.…”