| Titre : |
Particle characterisation methods for nanomaterials |
| Type de document : |
texte imprimé |
| Auteurs : |
Paul Staniland, Auteur ; Ian Tooley, Auteur ; Robert Sayer, Auteur ; Hannah Craney, Auteur ; Elizabeth Ryder, Auteur |
| Année de publication : |
2015 |
| Article en page(s) : |
p. 29-34 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Caractérisation
Dioxyde de titane
Nanoparticules
Oxyde de zinc
Photocatalyse
Produits antisolaires
|
| Index. décimale : |
668.5 Parfums et cosmétiques |
| Résumé : |
The physical properties of inorganic materials such as titanium dioxide (TiOâ‚‚) and zinc oxide (ZnO) have been utilised in a wide variety of applications for many years. The wide ranging properties of smaller particles of TiOâ‚‚ and ZnO make them ideal for use in sun care products; optimum UV attenuation, coupled with visible transparency results in excellent protection and aesthetic performance.
Recently, despite many scientific studies demonstrating the safety of these ingredients, concerns have been raised that some of the unique properties of these particles may result in adverse effects in cosmetic applications. The Scientific Commitee on Consumer Safety (SCCS) recently published Opinions on TiOâ‚‚ and ZnO in their nano form, which detailed specifications that they believed these materials should meet to be classed as 'safe to use' up to certain concentrations.
Given the importance of the subject area to both cosmetic manufacturers and consumers, it is essential to have an understanding of the methods which are used to examine the physical properties of such nanomaterials.
Many factors affect trhe analysis sample process, from pre-analysis sample preparation to post-analysis data interpretation. This article looks at some of the techniques commonly used tomeasured properties such as particle size,UV protection and photocatalitic activity. Signinificant variations in data can occur if methods are not standardised. The article will also investigate factors such as sample preparation and energy input which can affect results, and highlight the need for correlation of methods with the state of particles in sun care formulations. |
| Note de contenu : |
- Measuring UV-Vis protection
- Particle size and related properties
- Sample preparation - solvent choice
- Energy input
- Measuring photocatalytic activity
- TABLES : 1. The physical parameters analysed in SCS opinion SCCS/1516/13 - 2. Comparison of data from the dilution of TiO2 powder and dispersion in various solvents - 3. Data to compare sample processing methods |
| En ligne : |
https://drive.google.com/file/d/1ChzYVCWwHPnfqjG0whmI3TNJ3cGqwjBs/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24914 |
in PERSONAL CARE EUROPE > Vol. 8, N° 6 (11/2015) . - p. 29-34
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