Improving the Dispersibility of TiO2 in the Colloidal System Using Trifunctional Spherosilicates

Abstract

Titanium dioxide is a commonly used ingredient in cosmetics acting as a thickening agent and inorganic UV filter. However, TiO2 is difficult to disperse, which causes problems in spreading the formulations. The solution to this problem is to modify the titanium dioxide surface to change its properties by creation of the new type of hybrid inorganic–organic UV filter. Therefore, this study aimed to functionalize titanium dioxide with organosilicon compounds and determine how this modification will affect the dispersibility of TiO2 in the colloidal system and the stability of emulsions. First, the functionalized octaspherosilicates were obtained and characterized. Next, the synthesized compounds were applied as modifiers for titanium dioxide and were analyzed by FT-IR, UV-Vis, and laser diffraction. Furthermore, the hydrophilic–hydrophobic character was assessed by measuring the contact angle. The new materials were introduced into emulsions and the formulations were analyzed in terms of particle size distribution and stability by multiple light scattering. It was found that the modification of titanium dioxide with spherosilicates significantly improved both the stability of emulsion and the dispersibility of novel materials in the colloidal system compared to nonmodified TiO2. The covalent binding of the modifier with the titanium dioxide had an impact on the stability of the emulsion.

Liposome encapsulated hemoglobin modified Au@TiO2 for sonodynamic therapy

“…Gao et al reported the synergistic photothermal/SDT of titania-coated Au nanoplates in cancer treatment [20]. Despite these achievements in the combination of noble metals and TiO 2 NPs for SDT, factors such as agglomeration [21][22][23][24] or adsorb protein [25,26], and hypoxia in tumor site [27] can alter the physicochemical properties of Au@TiO 2 and hindering their therapeutic effects. Therefore, constructing delivery systems with oxygencarrying abilities, good dispersion and high ROS production of Au@TiO 2 in a biological environment is still a challenge in SDT field.…”

New Ethynylphenylborasilsesquioxanes—Their Reactivity and Behavior during Thermal Decomposition

“…Their unique cube-like structure creates a three-dimensional space, consisting of an inorganic core and attached organic functional groups [ 1 , 2 , 3 , 4 ]. Modifying the functional groups of these compounds allows one to adjust the product’s properties by synthesis [ 5 , 6 , 7 ]. Typically, functionalization occurs through catalytic reactions like hydrosilylation, silylative coupling, and metathesis [ 8 , 9 , 10 , 11 , 12 ].…”

Fabrication of PS-TiO2 hybrid via mini-emulsion polymerization: Study the effect of crosslink on the photocatalytic properties of the hybrid

“…Therefore, hybrids have been successfully used for various stable inorganic colloids free from aggregation, such as titanium oxide, zinc oxide, magnetic and metal nanoparticles. Miniemulsion polymerization is one of the common methods for preparing polymer hybrids in colloid systems [12][13][14][15][16][17].…”