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Factors to control the alignment of surface-treated titanium dioxide powders to maximize performance of sunscreens / Shoji Takekawa in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 45, N° 1 (02/2023)
[article]
Titre : Factors to control the alignment of surface-treated titanium dioxide powders to maximize performance of sunscreens Type de document : document électronique Auteurs : Shoji Takekawa, Auteur ; Miwa Ohara, Auteur ; Taisuke Banno, Auteur ; Kouichi Asakura, Auteur Année de publication : 2023 Article en page(s) : p. 38-49 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale
Barrière cutanée
Cosmétiques
Dioxyde de titane
Evaluation
Formulation (génie chimique) -- Stabilité
Peau -- Soins et hygiène
Produits antisolaires
Traîtements de surfaceIndex. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : Titanium dioxide powders are contained in a large class of colour cosmetics and sunscreen formulas. When they are used, the formation of a uniform functional powder layer on the skin is an important factor to show their functionality, such as aesthetic and UV protection. Attempts were made to extract the factors that affect the UV shielding ability of the deposited powder layer.
- Methods : Seven kinds of surface treatments were conducted on nano-sized titanium dioxide powder to modify the surface characteristics. Dispersion samples were prepared by mixing these powders with liquids, such as mixed solutions of cyclopentasiloxane, isododecane, coconuts alkane and dimethicone using a disperser and a bead mill. The dispersions were applied using an applicator on cellulose triacetate film, polycarbonate film and polymethyl pentene film. Laser microscope observation and micro-gloss glossmeter analysis were carried out to assess the flatness of the deposited powder layers, and the UV shielding ability was evaluated using SPF analyser.
- Results : Factors whose influences on the structure and UV shielding ability of the deposited powder layer being analysed were pseudo-HLB of the powders, liquids for preparing the dispersions and material of the substrates. Higher UV shielding ability was attained when powders having pseudo-HLB at around 6 were employed independent from the kinds of liquids and substrates. Flatness of the deposited layer was found to enhance the UV shielding ability of the UV-B region, while that of the UV-A region was scarcely influenced by the flatness. Employing lower surface tension liquids for preparing the dispersions and materials exhibiting lower polar components of surface free energy as substrates tended to enhance the UV shielding ability.
- Conclusion : Surface treatments conducted on the powders in this study were found to change UV shielding ability, especially UV-B shielding ability, and the relation between pseudo-HLB and UV shielding ability was scarcely influenced by the kinds of liquids. Both surface tension of liquids and the polar component of surface free energy of substrates affected the UV shielding ability. It was suggested that pseudo-HLB calculated based on chemical structure becomes useful information to choose optimum surface treatment to make uniform powder alignment independent from the surrounding environment.Note de contenu : - MATERIAL AND METHODS : Surface treatment - Preparation of dispersions and their application onto substrates - Evaluation of surface tension of liquids and surface free energy of each film - Characterization of UV shielding ability and surface structure of the applied layer
- RESULTS AND DISCUSSION : Surface tension of mixed solutions and surface free energy of each film - Effect of surface tension of mixed solutions of D5 and ID on the UV
shielding ability - Effect of cosmetic oils for the mixed solutions on the UV shielding ability - Effect of substrates on the UV shielding ability
- Table 1 : Preparation of three types of mixed solution, II, III and IV, containing cosmetic oils, DM and CA, having the surface tension approximately at 20 mN/m, i.e. the surface tension of mixed solution of D5 and ID whose weight ratio is 0.50:0.50 (mixed solution I)
- Table 2 : Mean contact angle of water and diiodomethane on the three kinds of films, mean temperature and mean three-phase point to evaluate surface free energy of each film and the dispersive and polar components
- Table 3 : Surface free energy of CTA, PC and PMP film and the dispersive and polar components
- Table 4 : Seven treated titanium dioxide powder samples employed for the experiments
- Table 5 : 45-degree gloss value of deposited seven types of surface-treated titanium dioxide layer formed on CTA filmDOI : https://doi.org/10.1111/ics.12816 En ligne : https://drive.google.com/file/d/1Dojnru5MAVRhG8HWAghnCSv5en47h7nv/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38818
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 45, N° 1 (02/2023) . - p. 38-49[article]Fast fading blues : the inside story / Roberto Mazzari in EUROPEAN COATINGS JOURNAL (ECJ), N° 2 (02/2014)
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Titre : Fast fading blues : the inside story : Indoor durability of phthalocyanines can be worse than expected Type de document : texte imprimé Auteurs : Roberto Mazzari, Auteur ; Umberto Dainese, Auteur ; Giovanni Marsili, Auteur Année de publication : 2014 Article en page(s) : p. 32-35 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Décoloration
Dioxyde de titane
Formulation (Génie chimique)
Ozone
Phtalocyanine de cuivre
Pigments inorganiques -- DétériorationIndex. décimale : 667.9 Revêtements et enduits Résumé : Copper phthalocyanine pigment blues show good light and weather fastness in exterior paints, but rapid fading has sometimes been observed in interior applications. Lights levels, binder type and the photoactivity of titanium dioxide appeared to have no significant effect. However, ozone in the air was shown to degrade the chromophore groups in the pigments. Note de contenu : - Test formulations and application procedure
- Initial results reveal some clear trends
- Light and photoactivity of TiO2 have little effect
- Sealing the test panels prevents fading
- Accelerated ozone test shows rapid colour loss
- Reactions studied by X-ray photoelectron spectroscopy
- Spectroscopy confirms degradation is due to ozoneEn ligne : https://drive.google.com/file/d/1iKtpGMKv5HfI4YjxMIsr3Rz0pta0J7IT/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20394
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 2 (02/2014) . - p. 32-35[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15959 - Périodique Bibliothèque principale Documentaires Disponible Faster estimation of photo-activity of effect pigments / Lara Dabrowski in EUROPEAN COATINGS JOURNAL (ECJ), N° 4 (04/2019)
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Titre : Faster estimation of photo-activity of effect pigments : A new method for determining the photocatalytic activity of pearlescent pigments coated with TiO2 Type de document : texte imprimé Auteurs : Lara Dabrowski, Auteur ; Julian Vogt, Auteur ; Marco Imhof, Auteur ; Laurent Deloux, Auteur Année de publication : 2019 Article en page(s) : p. 40-44 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dioxyde de titane
Photocatalyse
Photodétérioration
Photostabilité
Pigments à effets spéciaux
Pigments nacrés
Traîtements de surfaceIndex. décimale : 667.9 Revêtements et enduits Résumé : Titanium dioxide often serves as interference layer in pearlescent pigments, but exhibits photocatalytic activity. While this can be determined by a number of methods, they are all time-consuming. The "Brilliant Blue FCF" method presented here is fast and yields results which correlate with Florida weathering while requiring less effort and only small amounts of pigment. Note de contenu : - A new way to measure photoactivity
- Photoactivity of blue interference and anthracite-coloured pearlescent pigments
- Correlation with outdoor weathering results
- Fig. 1 : Schematic representation of photocatalytic processes on TiO2
- Fig. 2 : Photocatalytic degradation of brillant blue FCF ; samples before and after exposure
- Fig. 3 : Residual concentration of brilliant blue FCF after six hours exposure of pearlescent pigments without surface treatment
- Fig. 4 : Residual concentration of brilliant blue FCF in surface-treated variants after 20 h hours light exposure
- Fig. 5 : Correlation between weathering data and the indicator value for non-photostabilised pigments
- Fig. 6 : Correlation between weathering data and the photoactivity indicator for surface-treated pigments
- Table 1 : Residual concentration of brilliant blue FCF for non-surface-treated TiO2 pearlescent pigments after six hours' exposure to light
- Table 2 : Residual concentration of brilliant blue FCF for surface-treated pigments after 20 hours' exposure to lightEn ligne : https://drive.google.com/file/d/1rvoNpQEV61hV1Agwt8Dynm8LnpZsKeR-/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32298
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 4 (04/2019) . - p. 40-44[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20844 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Fighting fading : Surface functionalisation of fillers improves blanching resistance Type de document : texte imprimé Auteurs : Horst Van Beek, Auteur ; Petra Fritzen, Auteur ; Bernd Rohe, Auteur Année de publication : 2011 Article en page(s) : p. 72-77 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Charges (matériaux)
Dioxyde de titane
Revêtements poudre:Peinture poudre
Silanes
Sulfate de baryumIndex. décimale : 667.9 Revêtements et enduits Résumé : A major problem sometimes observed with powder coatings is a colour change known as 'blanching' caused by water penetration. Its severity is affected by both the surface area and modification of the inorganic filler and pigment particles. Experimental functionalised grades of both blanc fixe and titanium dioxide reduced blanching, as predicted. Note de contenu : - Advantages and problems of barium sulfate filler
- Benefits of particle surface functionalisation
- Silane treatment enhances bonding to resin
- Preparation and application of test formulations
- Test procedures summarised
- Filler choice and its effect on blanching resistance
- Further tests carried out without titanium dioxide
- Blanching resistance studied with rutile alone
- Effects of rutile combined with fillers
- How functionalisation affects coatings properties
- Blanching reduced, without adverse side effectsEn ligne : https://drive.google.com/file/d/16V6WEGxk09sggVvGd4TDYxsRAHhSh_ay/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12711
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 12 (12/2011) . - p. 72-77[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13573 - Périodique Bibliothèque principale Documentaires Disponible Fighting germs with solar energy / Teresa Huppmann in KUNSTSTOFFE INTERNATIONAL, Vol. 104, N° 5 (05/2014)
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Titre : Fighting germs with solar energy Type de document : texte imprimé Auteurs : Teresa Huppmann, Auteur ; Erich Wintermantel, Auteur ; Serhiy Yatsenko, Auteur ; Erhard Krampe, Auteur ; Karsten Kretschmer, Auteur ; Martin Bastian, Auteur Année de publication : 2014 Article en page(s) : p. 60-63 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimicrobiens
Chimie des surfaces
Composites
Dioxyde de titane
Energie solaire
Maladies -- Lutte biologique contre
Matières plastiques -- Additifs
Photocatalyse
Polymères en médecine
Rayonnement ultraviolet
Surfaces fonctionnellesIndex. décimale : 668.4 Plastiques, vinyles Résumé : Antimicrobial surfaces - Plastic composites containing titanium dioxide can minimize the risk of infection. The antimicrobial action of the TiO2 here is based on photocatalysis and is initiated by the UV components of light. Now, in a research project, the additive with the best efficacy has been selected from various commercially available TiO2 modifications. Note de contenu : - Production of the composites
- Determination of antimicrobial efficacy
- Pathogen-reducing effect of the polymer/Tio2 compositeEn ligne : https://drive.google.com/file/d/1lUO05uWcyIxCysO5Pi6GJGo6H3fQJREm/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21364
in KUNSTSTOFFE INTERNATIONAL > Vol. 104, N° 5 (05/2014) . - p. 60-63[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16228 - Périodique Bibliothèque principale Documentaires Disponible PermalinkFond de teint liquide E/H avec 5% de dioxyde de titane in PARFUMS COSMETIQUES ACTUALITES, N° 185 (10-11/2005)
PermalinkFormulating broad spectrum UV protection products / Afshan Nayyir-Mazhir in PERSONAL CARE EUROPE, Vol. 6, N° 5 (11/2013)
PermalinkFormulations sébo-résistantes pour une adhésion cutanée améliorée / Tatyana Abel Roberman in EXPRESSION COSMETIQUE, N° Hors-série (12/2020)
PermalinkFunctional finishing and coloration of textiles with nanomaterials / Shagufta Riaz in COLORATION TECHNOLOGY, Vol. 134, N° 5 (10/2018)
PermalinkFunctionalisation of particle surfaces and application in coatings thereof / Petra Fritzen in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 203, N° 4581 (02/2013)
PermalinkFunctionalised powder coatings for polymers / Andreas Rank in EUROPEAN COATINGS JOURNAL (ECJ), N° 11 (11/2021)
PermalinkFunctionalization of cotton fabric with nanosized TiO2 coating for self-cleaning and antibacterial property enhancement / Gulumser Doganli in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)
PermalinkGel-sol synthesis of surface-treated TiO2 nanoparticles and incorporation with waterborne acrylic resin systems for clear UV protective coatings / Changfeng Chen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 5 (09/2014)
PermalinkGloss of paint films : II. Effects of pigment size / Juergen H. Braun in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 66, N° 828 (01/1994)
PermalinkGloss retention / Juergen H. Braun in EUROPEAN COATINGS JOURNAL (ECJ), N° 5/95 (05/1995)
PermalinkHarnessing the sun / Kararzyna A. Michalow in EUROPEAN COATINGS JOURNAL (ECJ), N° 07-08/2012 (07-08/2012)
PermalinkHelping coatings perform / Mary E. Koban in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 194, N° 4478 (07/2004)
PermalinkHigh-performance pigment dispersant additives improve pigment wetting and dispersion in waterborne coatings / Ernest C. Galgoci in COATINGS TECH, Vol. 4, N° 5 (05/2007)
PermalinkHigh silica-alumina-coated TiO2 pigment with improved dry hiding for flat paints in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 6 (11/2022)
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