Accueil
Catégories
Ajouter le résultat dans votre panier Affiner la recherche
Etendre la recherche sur niveau(x) vers le bas
Zinc oxide : Winning choice for a sunscreen UV filter / Paul Williams in GLOBAL PERSONAL CARE, Vol. 23, N° 4 (04/2022)
[article]
Titre : Zinc oxide : Winning choice for a sunscreen UV filter Type de document : texte imprimé Auteurs : Paul Williams, Auteur Année de publication : 2022 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cosmétiques
Formulation (Génie chimique)
Ingrédients cosmétiques
Oxyde de zinc
Peau -- Soins et hygiène
Produits antisolaires
Produits chimiques -- Classification
Règlements (droit administratif)Index. décimale : 668.5 Parfums et cosmétiques Résumé : It is well known that sunscreen prevents sunburn, reduces the risk of metanoma and reduces the sun-retated ageing of skin. Consumers not only demand that sunscreen be effective, they also prefer sunscreens with organoleptic properties.
In addition, there is a growing trend for sunscreens to contain natural ingredients that can safely be applied to human skin and which are environmentally safe. These are some of the more recent challenges that manufacturers face as they design their sunscreen formulations.
The manner and extent of regulation of sunscreens vary across the world. In the USA, the FDA regulates sunscreens as a drug. In Canada, depending upon its formulation, a sunscreen might be classified either as a natural health product or an over-the-counter drug.
In the EU, Chinese and Japanese sunscreens are regulated as cosmetics. Australia regulates sunscreen as a cosmetic if its sun protection factor (SPF) is a secondary function and as a therapeutic/drug if SPF is a primary function.
The primary focus of most regulations is a sunscreen's UV filter, the component that provides protection from UV rays. UV filters are classified in three wavelengths regions : the longest is UVA1 (340-400 nm), the intermediate is UVA2 (320- 340nm) and the shortest is UVB (290-320 nm).
Although it is common not to differentiate between UVA1 and UVA2, some UVA filters do not have optimal performance in both of these regions. UVA rays have less energy and do not burn the skin litre UVB rays, but they have been shown to accelerate skin ageing, as well as having the potential to contribute to melanoma.Note de contenu : - Organic & inorganic filters
- Safety profiles
- Regulation of UV filters
- Sunscreens components
- Trial formulation
- Experimental
- Table 1 : FDA active UV filters for use in sunscreens
- Table 2 : FDA classification of UV filters
- Table 3 : Hel list materials that should not be included in sunscreensEn ligne : https://drive.google.com/file/d/1PFE8zFUSxmBVaDHxp2e5gzaudfowchqC/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37422
in GLOBAL PERSONAL CARE > Vol. 23, N° 4 (04/2022)[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 23326 - Périodique Bibliothèque principale Documentaires Disponible Zinc oxide (Zno) nanoparticles for enhancement of fastness properties in cationic finishing / RamKumar Kothandam in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 5 (05/2017)
[article]
Titre : Zinc oxide (Zno) nanoparticles for enhancement of fastness properties in cationic finishing Type de document : texte imprimé Auteurs : RamKumar Kothandam, Auteur ; R. Jayavel, Auteur ; Sanjeev Gupta, Auteur Année de publication : 2017 Article en page(s) : p. 162-167 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cations
Cuirs et peaux -- Finition
Cuirs et peaux -- Propriétés mécaniques
Flexion (mécanique)
Nanoparticules
Nanoparticules -- Synthèse
Oxyde de zinc
Résistance aux frottements humidesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Zinc oxide (ZnO) nanoparticles were synthesized by precipitation technique and used along with cationic finishes to improve the wet rub fastness properties and flexing resistance of coated leather. The morphology, composition, and structure of the ZnO nanoparticles were analyzed using Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD). ZnO nanoparticles were dispersed in water and incorporated in different ratios in conventional Nitrocellulose lacquer emulsion topcoat formulation was coated on the leather surface by spray coater. ZnO nanoparticles coated leather samples exhibited improved wet and dry rub fastness and flexing resistance property. Optimum quantity up to 2-4 g/L of ZnO nanoparticles in the season was desirable for upgrading the value of leathers. ZnO nanoparticles in cationic finishing can be highly beneficial for up gradation of low-grade crust with improved fastness properties without affecting its natural look and feel. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of Zno nanoparticles - Preparation of conventional base coat. Leather finishing formulation - Preparation of top coat formulation with incorporation of Zno nanoparticles
- RESULTS AND DISCUSSION : X-ray diffraction spectroscopy (XRD) analysis - Scanning electron microscopy (SEM) - Energy-dispersive X-ray (EDAX) peaks of ZnO nanoparticles - Elemental composition analysis - Determination of applied physical properties of ZnO nanoparticles coated leather - Wet and dry rub analysis - Flexing resistanceEn ligne : https://drive.google.com/file/d/1YD1JBGZfQ8d5PuxnxYICMpqxqRIOd0Ep/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28552
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXII, N° 5 (05/2017) . - p. 162-167[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 18894 - Périodique Bibliothèque principale Documentaires Disponible