Safer-by-design hybrid nanostructures: an alternative to conventional titanium dioxide UV filters in skin care products

Shandilya, Neeraj; Capron, Isabelle

doi:10.1039/c7ra02506h

Cited by 19 publications

(12 citation statements)

References 60 publications

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“…Oza first demonstrated that microcrystalline cellulose was able to form a network around oil droplets . Since that publication, many nanocelluloses stabilized emulsions have been reported with the various types of nanocelluloses; nanofibrillated celluloses, , cellulose nanocrystals, − and bacterial nanocellulose. , Nanocellulosic materials can also be hydrophobized to produce water-in-oil emulsions , and double emulsions, , or modified for functional emulsions. − Such particle stabilized emulsions refer to the so-called Pickering emulsions that form surfactant-free, highly stable emulsions armored by a layer of solid particles. If the mechanism of adsorption is not fully elucidated, several points are already clearly established.…”

Section: Introductionmentioning

confidence: 99%

Design of Pickering Micro- and Nanoemulsions Based on the Structural Characteristics of Nanocelluloses

2018

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The development of biobased materials with lower environmental impact has seen an increased interest these last years. In this area, nanocelluloses have shown a particular interest in research and industries. Cellulose nanocrystals (CNC) and cellulose nanofibrils (CNF) are both known to stabilize oil-water interfaces, forming the so-called Pickering emulsions which are surfactant-free, highly stable emulsions armored by a layer of solid particles. This work describes the emulsion's characteristics and properties according to particle size, shape and surface chemistry in order to produce controlled micro- and nanoemulsions stabilized by nanocelluloses. For this purpose, four nanocelluloses which vary in source, length, width, and surface charge density were used. Isolated droplets were produced by CNCs and interconnected droplets by CNFs that led to distinct drop size (micro- and nanosized), organization of nanoparticles at the surface of the droplets, stability, and mechanical properties through rheological measurements. This work gives a precise description of the resulting emulsions and shows the ability to produce nanosized droplets for CNC and TEMPO oxidized CNF but not for the less fibrillated CNF using HP-homogenizer. Individual noncreaming droplets with average diameters as low as 350 nm were achieved for cotton CNCs and TEMPO oxidized CNFs.

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Section: Introductionmentioning

confidence: 99%

Design of Pickering Micro- and Nanoemulsions Based on the Structural Characteristics of Nanocelluloses

2018

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“…From a sample of six sunscreens, rutile nTiO 2 was present in three sunscreens, while the combination of rutile and anatase forms of nTiO 2 was in one sunscreen [10,22,69]. Overall, most studies demonstrate that rutile nTiO 2 is the most widely used form [10,58,59,[70][71][72][73]. Rutile nTiO 2 has also been reported in paints [10] and cotton fabrics [61].…”

Section: Titanium Dioxide Nanoparticles (Ntio 2 )mentioning

confidence: 97%

Aquatic Environment Exposure and Toxicity of Engineered Nanomaterials Released from Nano-Enabled Products: Current Status and Data Needs

et al. 2021

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Rapid commercialisation of nano-enabled products (NEPs) elevates the potential environmental release of engineered nanomaterials (ENMs) along the product life cycle. The current review examined the state of the art literature on aquatic environment exposure and ecotoxicity of product released (PR) engineered nanomaterials (PR–ENMs). Additionally, the data obtained were applied to estimate the risk posed by PR–ENMs to various trophic levels of aquatic biota as a means of identifying priority NEPs cases that may require attention with regards to examining environmental implications. Overall, the PR–ENMs are predominantly associated with the matrix of the respective NEPs, a factor that often hinders proper isolation of nano-driven toxicity effects. Nevertheless, some studies have attributed the toxicity basis of observed adverse effects to a combination of the released ions, ENMs and other components of NEPs. Notwithstanding the limitation of current ecotoxicology data limitations, the risk estimated herein points to an elevated risk towards fish arising from fabrics’ PR–nAg, and the considerable potential effects from sunscreens’ PR–nZnO and PR–nTiO2 to algae, echinoderms, and crustaceans (PR–nZnO), whereas PR–nTiO2 poses no significant risk to echinoderms. Considering that the current data limitations will not be overcome immediately, we recommend the careful application of similar risk estimation to isolate/prioritise cases of NEPs for detailed characterisation of ENMs’ release and effects in aquatic environments.

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“…Other than that, the physical and chemical properties of these materials can be tuned to the desired direction. The diverse nature of softness, flexibility, and functionality of the organic part in a hybrid system interlinked with the hard, rigid, and thermally stable inorganic components exponentially raises their potential in developing advanced functional materials 11 . In support of this, few works have been reported related to developing hybrid materials that remarkably utilize ZnO, and TiO 2 , as inorganic counterparts along with polymers as organic parts for UV‐blocking applications.…”

Section: Introductionmentioning

confidence: 99%

2‐Hydroxy‐1,4‐naphthoquinone [Lawsone] integrated rare‐earth hybrid materials as biocompatible UV/IR filter agents

Narayanan

Kumar

Gnanaraj

et al. 2023

MedComm – Biomaterials and Applications

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UV filter agents are essential ingredients in cosmetics and fabrics for rendering the property of protection from harmful UV radiation. The focus of this research was on the development of biocompatible hybrid UV/IR filter agents through sol-gel processing of nano-sized lanthanum titanate, zirconate, and phosphate-based rare-earth materials. 2-Hydroxy-1,4-naphthoquinone (Lawsone) is an ideal candidate, owing to its biocompatibility, for treating the sol of the rare-earth systems to produce inorganic-organic hybrids with classical orange shades. The rare-earth hybrids were characterized by X-Ray diffraction, dynamic light scattering, fourier transform infrared spectroscopy, scanning electron microscopy, UV-Vis, photo-luminescence, and Near Infrared (NIR) spectroscopy. The results of characterization indicated that the hybrids offer >90% of NIR reflectance in the wavelength region from 700 to 1100 nm. They also exhibited excellent shielding in UV-A and UV-B regions, thus qualifying them as cool colors with useful optical as well as heat management characteristics. The sun protection factor calculated by optical density measurements showed that the synthesized hybrids have potential applications as UV filter agents in sunscreen lotions. The cell viability analyzed by the MTT (4,5-dimethylthiazol-2-yl)−2,5-diphenyltetrazolium bromide) assay affirmed the biocompatibility of the hybrids as none of the systems was found cytotoxic. This study was devoted to exploring the beneficial properties of rareearth-based hybrid systems in pharmacological applications.

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Safer-by-design hybrid nanostructures: an alternative to conventional titanium dioxide UV filters in skin care products

Abstract: Experimental synthesis of TiO2 nanoparticles via safer-by-design approach to minimize their exposure risks.

Cited by 19 publications

References 60 publications

Design of Pickering Micro- and Nanoemulsions Based on the Structural Characteristics of Nanocelluloses

Design of Pickering Micro- and Nanoemulsions Based on the Structural Characteristics of Nanocelluloses

Aquatic Environment Exposure and Toxicity of Engineered Nanomaterials Released from Nano-Enabled Products: Current Status and Data Needs

2‐Hydroxy‐1,4‐naphthoquinone [Lawsone] integrated rare‐earth hybrid materials as biocompatible UV/IR filter agents

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