Lamellar compounds intercalated with anions with solar protection function: A review

Franco, Julia Gomes; Ataide, Janaína Artem; Ferreira, Aryel H.; Mazzola, Priscila Gava

doi:10.1016/j.jddst.2020.101869

Cited by 8 publications

(1 citation statement)

References 47 publications

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“…Thus, ROS effects can be minimized by antioxidant compounds [ 57 ]. In this perspective, materials that have UV shielding ability and antioxidant activity perform simultaneously beneficial functions to the human organism; consequently, they can be denominated multifunctional filters [ 58 , 59 ]. The antioxidant capacity of the Zn-NO 3 -LSH, LSH-ferulate materials, and Nafel was investigated by spectrophotometric methods [ 57 ] using model radicals (DPPH • and ABTS •+ ) and radical (ROO • ) and non-radical (HOCl) reactive species of occurrence in biological systems.…”

Section: Resultsmentioning

confidence: 99%

Zn(ferulate)-LSH Systems as Multifunctional Filters

et al. 2021

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Excessive UV solar radiation exposure causes human health risks; therefore, the study of multifunctional filters is important to skin UV protective ability and also to other beneficial activities to the human organism, such as reduction of reactive oxygen species (ROS) responsible for cellular damages. Potential multifunctional filters were obtained by intercalating of ferulate anions into layered simple metal hydroxides (LSH) through anion exchange and precipitation at constant pH methods. Ultrasound treatment was used in order to investigate the structural changes in LSH-ferulate materials. Structural and spectroscopic analyses show the formation of layered materials composed by a mixture of LSH intercalated with ferulate anions, where carboxylate groups of ferulate species interact with LSH layers. UV-VIS absorption spectra and in vitro SPF measurements indicate that LSH-ferulate systems have UV shielding capacity, mainly UVB protection. The results of reactive species assays show the ability of layered compounds in capture DPPH•, ABTS•+, ROO•, and HOCl/OCl− reactive species. LSH-ferulate materials exhibit antioxidant activity and singular optical properties that enable their use as multifunctional filters.

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Section: Resultsmentioning

confidence: 99%

Zn(ferulate)-LSH Systems as Multifunctional Filters

et al. 2021

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Clays in Cosmetics and Personal-Care Products

Viseras

Sánchez-Espejo

Palumbo

et al. 2021

Clays and clay miner.

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Clays are used in various cosmetic formulations, such as sunscreens, toothpastes, deodorants, creams, hair cosmetics, makeups, nail polish, facial masks, and shampoos, among others, to improve the organoleptic and physicochemical characteristics, to increase the stability, or to facilitate elaboration. Together with their technological functionalities, clays are cosmetologically active ingredients with cleaning, anti-aging, anti-wrinkling, and sun-care functionalities. Talc, kaolinite, mica, and some smectites are the clay minerals used most frequently in cosmetic products, but several other phyllosilicates as well as modified and synthetic clays are also used. Sometimes, clays are useful in the design of cosmetics just because they are made of rigid, small, and anisometric particles. Kaolinite and mica are made of hard prismatic particles which are lightly abrasive over the skin, teeth, or hair. Electric charges in smectites result in ion-exchange capacities useful in the loading of active cosmetics but also adsorbing and cleaning waste substances. Intermediate net negative charges of smectites result in layer expansion in polar media and specific rheological properties that are very useful in cosmetic formulations. The absence of charged particles in talc and kaolin make them flow easily resulting in lubricant effects. Protection against radiation from the sun by clay particles and decorative effects complete the possibilities of clays in cosmetics. The nomenclature for clays used as ingredients in cosmetics follows historical use and the names of commercial products, rather than following strict compositional principles. In this sense, an effort was made here to correlate the names of the minerals that make up each of the clay-based cosmetic ingredients.

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