Biologically inspired fighting germs using HCIO hydrogels with smectites / Jessica Gödeker in SOFW JOURNAL, Vol. 148, N° 12 (12/2022)  

[article]  inSOFW JOURNAL > Vol. 148, N° 12 (12/2022) . - p. 2-7 Titre : Biologically inspired fighting germs using HCIO hydrogels with smectites Type de document : texte imprimé Auteurs : Jessica Gödeker, Auteur ; Anne Drewer, Auteur ; Tom Lamont, Auteur Année de publication : 2022 Article en page(s) : p. 2-7 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acide hypochloreux Argile Chlore Désinfectants Désinfection Détergents Formulation (Génie chimique) Hectorite hydrocolloïdes Hygiène Laponite Rhéologie Smectite Thixotropie Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Hypochlorous acid (HClO) is formed in the white blood cells of all mammals. As part of a mechanism that developed several millions of years ago, it also helps the human body to protect against pathogens that enter it. This makes the weak acid a nature-based option for disinfection. Despite this, a disadvantage of water-thin solutions of hypochlorous acid is that they have significantly limited anti-microbial potential due to the reduced contact time. Hydrogels overcome this limitation and lead to improved and more sustainable use. Due to the high reactivity of hypochlorous acid, common additives such as polymer thickeners and natural clays are not suitable. Synthetic smectite clays – of which the presented PURABYK-R 5500 is one example – are very similar in structure to natural clays. However, due to their subsequent technical development, synthetic smectite clays exhibit better stability and are therefore very well suited to forming these hydrogels. They stabilize the hypochlorous acid in the required pH value range and are free from components that impair the activity of HClO. These unique additives are produced under controlled conditions from naturally occurring inorganic mineral sources. They offer the possibility of using structures from nature, paired with a very high purity and consistent quality. Their great potential is presented here using PURABYK-R 5500 as an example. Note de contenu : - INTRODUCTION : Hypochlorous acid - an effective nature-based weapon for combatting germs - HCIO-based hydrogels - a challenging system - PURABYK-R 5500 - a new, modified phyllosilicate with improved compatibility - MATERIALS AND METHODS : Formulation of the hydrogel with PURABYK-R 5500 - A more in-depth reflection - high-resolution procedure for forming the nanostructures - RESULTS AND DISCUSSION : Micro- and macro-morphology using TEM and AFM - Viscosity behavior of the hydrogel - thixotropy and yield point - Biocide effectiveness - influence of PURABYK-R 5500 - Table 1 : Formulation of the hydrogel En ligne : https://drive.google.com/file/d/1zGfLvdCzX9ayCPFPutQAIz8mnUSThkhg/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38571 [article]

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Eco-shield for paints in EUROPEAN COATINGS JOURNAL (ECJ), N° 9 (09/2017)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 9 (09/2017) . - p. 48-53 Titre : Eco-shield for paints : Multifunctional organoclay composition offers clean-tech protection Type de document : texte imprimé Année de publication : 2017 Article en page(s) : p. 48-53 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimicrobiens -- Suppression ou remplacement Argile Essais accélérés (technologie) Essais dynamiques Hydrophilie Hydrophobie Protection contre le rayonnement ultraviolet Résistance à la compression Revêtements -- Additifs Revêtements -- Analyse Revêtements -- Propriétés mécaniques Revêtements en bâtiment Smectite Index. décimale : 667.9 Revêtements et enduits Résumé : Current and future restrictions on biocides are forcing manufacturers of building finishing materials to seek alternative products. A novel multifunctional organoclay additive has been developed by focusing on mineral materials that control coating degradation and which can be used in bulding or finishing materials such as plasters, mortars, primers, paints and other protective or decorative coatings. Note de contenu : - Smectite clay to improve functionality - Clean technology for novel organoclay - Hydrophobic and hydrophilic functionality - UV protection - Zero-leaching product safe to use - Added benefits indicate potential for broader application - FIGURES : 1. Intercalation of organic surfactant between layers of clay considerably increases the basal spacing of the layer (d) < d2) and also changes the clay surface properties from hydrophilic to hydrophobic - 2. X-ray powder diffraction data for mechanochemically modified SWy-2 with different aliphatic quaternary ammonium salts (carbon chaing length varies from C8 to C18) - SEM pictures of raw and mechanochemically organophilised SWy-2 particle aggregates - 4. The total colour difference of CIELAB versus the non-treated part on the sample - 5. The tested compression strength of the samples - 6. The tested tension strength of the samples - 7. The appearance of the traditional lime paint after the 6 month field test exposure En ligne : https://drive.google.com/file/d/1sqz_V8klcwBLUxcSvWprvOMk1NPEIcZ-/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29037 [article]

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Liquid granite / Anette Lork in EUROPEAN COATINGS JOURNAL (ECJ), N° 5 (05/2013)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 5 (05/2013) . - p. 24-31 Titre : Liquid granite : Multicolour imitation-stone paints with improved stability and performance Type de document : texte imprimé Auteurs : Anette Lork ; Markus Möller Année de publication : 2013 Article en page(s) : p. 24-31 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Argile Gel de silice Microscopie électronique à balayage Peinture multicolore Smectite Index. décimale : 667.9 Revêtements et enduits Résumé : A novel approach to multicolour technology offers surprising uses, such as paint with a stone-like effect. It is based on a gel of a synthetic layered silicate and a natural smectitic clay. High-resolution SEM images reveal astonishing structures and for the first time show the unique structure-effect principle by which the clay mineral gel stabilises the paint droplets. Note de contenu : - Multiple colours in a simple vessel - Gel formation model - How synthetic layered silicate acts in multicolour paints - Preparing samples for scanning electron microscopy - Anticipated structures are not found - New formulation concept improves shelf life - Microstructure of freeze-dried MCP samples - Spray application is possible within limits - Structure-effect principle of the clay mineral phases - Evidence from microstructures analysed - Implications of the clay structures En ligne : https://drive.google.com/file/d/1TXh5laUphZslYPqs5TvF6tOMgZafvk-M/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18456 [article]

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Natural and synthetic clay-filled coatings for insulation barrier applications / Roy T. Fox in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 181-189 Titre : Natural and synthetic clay-filled coatings for insulation barrier applications Type de document : texte imprimé Auteurs : Roy T. Fox, Auteur ; H. Zhang, Auteur ; M. A. Barger, Auteur ; C. Han, Auteur ; M. Paquette, Auteur Année de publication : 2016 Article en page(s) : p. 181-189 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Argile Caractérisation Charges (matériaux) Latex Matériaux -- Propriétés barrières Polyuréthanes Revêtements protecteurs Smectite Index. décimale : 667.9 Revêtements et enduits Résumé : Hybrid organic/inorganic coatings provide effective barriers to gas transmission and therefore find utility in a variety of application areas, including surface treatment of foams for thermal insulation purposes. Blends of aqueous latexes with select smectite clays are particularly attractive, in that the efficient formation of layered interconnecting networks occurs upon drying. The plate-like structure of clays enables this behavior at relatively low volumetric content of inorganic material. A variety of both natural and synthetically derived high purity clays are evaluated for their ability to form low permeability films, with effects of loading, aspect ratio, and refinement technique described. Note de contenu : - EXPERIMENTAL : Materials - Coating characterization - DISCUSSION : Clay types - Clay loadings - Refinement technique - Polymeric coating carrier DOI : 10.1007/s11998-015-9726-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9726-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25387 [article]

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