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Concrete benefits from new nanoparticles / Antonio Esteban-Cubillo in EUROPEAN COATINGS JOURNAL (ECJ), N° 11 (11/2013)
[article]
Titre : Concrete benefits from new nanoparticles : Sepiolite carrier enhances photocatalytic activity of TiO2 Type de document : texte imprimé Auteurs : Antonio Esteban-Cubillo, Auteur ; raùl Pina-Zapardiel, Auteur ; Jose Vera-Agullo, Auteur ; Julio Santarén, Auteur Année de publication : 2013 Article en page(s) : p. 5-9 Note générale : Supplément "Construction chemicals" - Bibliogr. Langues : Anglais (eng) Catégories : Additifs
Atmosphère -- Pollution -- Lutte contre
Construction -- Matériaux
Dépolluants
Dioxyde de titane
Essais accélérés (technologie)
Matériaux cimentaires
Microscopie électronique à balayage
Monoxyde d'azote
Mortier -- Additifs
Nanoparticules
Photocatalyse
Réduction des composés organiques volatils
Revêtement auto-nettoyant:Peinture auto-nettoyante
Revêtements en bâtiment:Peinture en bâtiment
Revêtements en béton asphaltique
SépioliteLa sépiolite est un minéral du groupe des argiles à structure fibreuse. Le nom de ce minéral dérive d'un terme grec ancien, francisé en sépion et qui désigne l'os de seiche.
Chaque fibre est formée d'une multitude de tunnels (ou canalicules) d'environ 1 nm^2 régulièrement espacés (voir "Structure cristalline"). Cette configuration particulière en briques creuses allongées, propre à son arrangement cristallin, lui confère une surface spécifique très importante: 394 m^2/g.
Suivant les carrières dont elle est extraite, on note la présence de fer, d'aluminium voire de nickel et même de manganèse dans la structure cristalline de la sépiolite.
Structure cristalline : La formule générale retenue dans la littérature est Mg4 Si6 O15 (OH)2 · 6(H2O).
La structure est en doubles feuillets de type mica, mais la polarité de chaque feuillet s’inverse tous les 6 tétraèdres, formant ainsi une structure 3D de doubles rubans anastomosés créant les canalicules décrits ci-dessus.
Elle appartient au groupe d'espace Pnan, avec comme paramètre de maille : a = 13.43 Å, b = 26.88 Å, c = 5.281 Å.
ToluèneLe toluène, également appelé méthylbenzène ou phénylméthane est un hydrocarbure aromatique sous la forme d'un liquide transparent, très répandu et utilisé comme produit de départ industriel ou comme solvant. Il dissout un grand nombre d'huiles, graisses, résines (naturelles ou de synthèse). Il a une odeur caractéristique (type dissolvant pour peinture) rappelant celle, douceâtre, du benzène apparenté.Index. décimale : 667.9 Revêtements et enduits Résumé : Sepiolite has been used as a carrier that allows monodispersed TiO2 nanoparticles to be carried on its surface, so improving their catalytic efficiency. This material has been tested in several different cementitious materials. It has proved to be highly effective in the reduction of airborne pollutants and provides self-cleaning properties. Note de contenu : - How to enhance the effectiveness of nanoparticles
- Composite photocatalyst is flexible in application
- Why the new additive has high efficiency
- Chemical principle outlined
- Additive has minimal effect on physical properties
- Efficient NO and VOC removal
- Tests carried out in paving blocks
- Photocatalytic mortar render
- Asphalt road surfaces can also be treated
- Good performance retained in simulated wear tests
- Façade panels and screeds are undergoing tests
- An efficient and versatile construction additive
- Table 1 : Influence of TiO2-sepiolite on physical properties of a rendering mortar and of a single-coat mortar
- Table 2 : Decontamination tests for NO and toluene
- Table 3 : Mechanical properties of asphalt surfaces
- Figure 1 : Samples of different façade formulations with TiO2-sepiolite additive during the self-cleaning test
- Figure 2 : SEM of a façade precast surface and SEM-EDX with TiO2 mapping
- Figure 3 : Asphalt pavement (left) and speciments tested under the heel tracking test
- Figure 4 : SEM of a façade precast surface and SEM-EDX with TiO2 mappingEn ligne : https://drive.google.com/file/d/1CeDmluhwx-VXaZ6pA3Wcl5nw8uewOMFa/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19736
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 11 (11/2013) . - p. 5-9[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15700 - Périodique Bibliothèque principale Documentaires Disponible Considerations for the new environmental impact of paints containing TiO2 / Billy Golder in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 204, N° 4600 (09/2014)
[article]
Titre : Considerations for the new environmental impact of paints containing TiO2 Type de document : texte imprimé Auteurs : Billy Golder, Auteur Année de publication : 2014 Article en page(s) : p. 39-42 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dépolluants
Dioxyde de titane
Economies d'énergie
Environnement -- Etudes d'impact
Photocatalyse
Réflectivité thermique
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : TiO2 has some very unique properties and remains the most effective and commercially significant white pigment on the market today, with no direct alternative for the vast majority of applications. But did you know that TiO2 is actually beneficial for reducing energy consumption and counteracting global warming? TiO2 can be put to work every day to improve the environment and significantly reduce our CO2 emissions. TiO2 pigments are used as intermediates in the production of paints and coatings and as such a 'cradle to gate' product carbon footprint is a common request from those who wish to calculate the footprint of their own products. A full product 'cradle to gate' carbon footprint number requires all feed-stocks and off-site inputs to be included in the calculation. An industry average product carbon footprint for 2012 has been calculated by the Titanium Dioxide Manufacturers Association (TDMA). The TDMA cradle to gate average value of 5.3 kg CO2e/kg will be used in all the following considerations as we argue purely on the technical merits of TiO2; its ability to mitigate its own carbon footprint and assist us in reducing our environmental impact. Note de contenu : - TiO2 physics
- Bright interiors: TiO2 as a visible light reflector
- White roofs: TiO2 as an infra-red reflector
- Photocatalyst: TiO2 as a depolluter
- Paint's footprintEn ligne : https://drive.google.com/file/d/1KF3_MDT0CAHDmJwK73fXs1ve7FmOCxVK/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22214
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 204, N° 4600 (09/2014) . - p. 39-42[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16527 - Périodique Bibliothèque principale Documentaires Disponible Doping for a better cleaning agent / Stephan Peter Bloess in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 198, N° 4528 (09/2008)
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Titre : Doping for a better cleaning agent Type de document : texte imprimé Auteurs : Stephan Peter Bloess, Auteur ; Peter Jakob Gross, Auteur Année de publication : 2008 Article en page(s) : p. 36-45 Langues : Anglais (eng) Catégories : Dépolluants
Dioxyde de titane
Photocatalyse
Photodétérioration
Pollution -- Lutte contreIndex. décimale : 667.9 Revêtements et enduits Résumé : The author describe improving the decomposition of pollutants and increasing the dirt-repelling properties of materials with doped titanium dioxide.
Titanium dioxide is by far the most commonly produced white pigment. In addition to its extraordinary hiding power and excellent whitening properties, this transition metal oxide features other remarkable capabilities. Photochemical processes at the surface of titanium dioxide allow the decomposition of organic substances (photocatalysis) and can prevent drop formation on surfaces, as well as drastically facilitate the run-off of liquids from surfaces (photohydrophilicity). The crucial element in these phenomena is light energy, which aids titanium dioxide in providing radicals for the decomposition of unwanted substances, and in influencing the wetting properties of surfaces. While until recently, only the UV portion of sunlight could be used, with the proper doping of titanium dioxide a considerable portion of the visible light can now be also explored. This achievement has significantly widened the range of applications in which titanium dioxide photocatalysts can deploy their effect.Note de contenu : - Discovery and industial exploration
- Worldwide consumption and applications
- Decomposition of pollutants through photocatalys
- Modified titanium dioxide for improved utilisation of the light spectrum
- Photocatalytic decomposition even in diffuse lightEn ligne : https://drive.google.com/file/d/1Lxwi3Eyk06mJSBGiacO79unl6eqXaNEq/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27617
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 198, N° 4528 (09/2008) . - p. 36-45[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 010736 - Périodique Bibliothèque principale Documentaires Disponible Improving indoor air quality using smart paints based on novel binder / Girish A. Bhagwat in PAINTINDIA, Vol. LXVI, N° 3 (03/2016)
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Titre : Improving indoor air quality using smart paints based on novel binder Type de document : texte imprimé Auteurs : Girish A. Bhagwat, Auteur ; Priya Nair, Auteur Année de publication : 2016 Article en page(s) : p. 72-78 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Air intérieur -- Pollution
Atmosphère -- Pollution
Dépolluants
Formaldéhyde -- Toxicologie
Formulation (Génie chimique)
Liants
Matériaux intelligents
Revêtements -- Additifs:Peinture -- AdditifsIndex. décimale : 667.9 Revêtements et enduits Résumé : "Environmental pollution" is often associated with outdoors as it is visible in the form of smoke and dust. But how many of us would really know that our own home, office and other indoor areas can equally be polluted ? According to EPA (US Environmental Protection Agency), majority of population is
unaware of this fact and is facing its consequences on health and well being. As per World Health Organization (WHO) report, around 4.3 million deaths each year are associated with exposure to indoor air pollution and around 3.7 million deaths a year are attributed to ambient (outdoor) air pollution. It's an issue that needs to be dealt with seriously, because people exposed to indoor air pollutants can include infants, elderly persons, housewives and terminally ill persons. These people spend more than 8 hours indoors and could end up breathing air with dangerous pollutants leading to serious health issues. Over the years, environmental agencies and media have been able to create awareness among people in various countries on Indoor Air Quality (IAQ) and guidelines have been published to define healthy IAQ which are listed in Table 1.Note de contenu : - What is formaldehyde and why is it so harmful ?
- Is formaldehyde in my home ?
- How can formaldehyde affect health ?
- What can we do to reduce formaldehyde at home ?En ligne : https://drive.google.com/file/d/1iXlH7pXn_Jxnm1LXvQn0kW5TuxOFDfzT/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26235
in PAINTINDIA > Vol. LXVI, N° 3 (03/2016) . - p. 72-78[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18060 - Périodique Bibliothèque principale Documentaires Disponible Improving indoor air quality with amino alcohols / Mark Langille in SURFACE COATINGS INTERNATIONAL, Vol. 106.1 (01-02/2023)
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Titre : Improving indoor air quality with amino alcohols Type de document : texte imprimé Auteurs : Mark Langille, Auteur ; Romain Severac, Auteur Année de publication : 2023 Article en page(s) : p. 52-55 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Air -- Epuration
Air intérieur
Amino-alcools
Dépolluants
Formaldéhyde -- Elimination
Formulation (Génie chimique)
Matériaux -- Propriétés fonctionnelles
Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs
Revêtements intérieurs:Peinture intérieureIndex. décimale : 667.9 Revêtements et enduits Résumé : Amino alcohols based on ANGUS chemistry can assist formulators in creating more environmentally-friendly paints and coatings. Multifunctional additives from ANGUS can be used to create low- and zero-VOC waterborne formulations, as well as low emissive coatings that qualify for green label certification programs. Amino alcohols are also highly effective formaldehyde scavengers that can be used to create functional coatings that improve indoor air quality.The level of hazardous air pollutants can be five times higher in indoor air than outdoor air and chronic exposure to these invisible indoor toxins, such as formaldehyde, can create long-term health problems. An attractive solution to reducing indoor formaldehyde levels is through a chemical remediation or scavenging system, and one of the emerging trends for the effective removal of indoor air contaminants is the use of functional coatings. We demonstrate how the unique functionality of amino alcohols can help improve indoor air quality by providing high-efficiency formaldehyde scavenging performance when used in waterborne architectural paints. Amino alcohol additives are highly effective at low dosages and do not require major reformulation work, enabling the creation of functional coatings to improve indoor air quality. Note de contenu : - ANGUS products for improving indoor air quality
- Methodology
- Formaldehyde Scavenging Test by ISO 16000-23
- Results
- Table 1 : Base waterborne formulation
- Table 2 : Performance of coatings formulations according to Chinese JC/T 1074-2008 standard
- Fig. 1 : The evolution of more environmentally-friendly paints and the emergence of VOC remediation technologies
- Fig. 2 : Analysis of airborne VOC concentrations in residences, daycare centres and schools in France
- Fig. 3 : Reaction of AEPD VOX 1000 with two equivalents of formaldehyde to yield a bisoxazolidine
- Fig. 4 : Reaction of TRIS AMINO with two equivalents yield a bisoxazolidine
- Fig. 5 : Schematic of a small-scale testing chamber to monitor formaldehyde scavenging performance of a coating
- Fig. 6 : Evaluation of scavenging performance according to 150 16000-23 test methodEn ligne : https://drive.google.com/file/d/1OxJWCAJhoNmjnT-pN6mzI03-xnzhdkXt/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38874
in SURFACE COATINGS INTERNATIONAL > Vol. 106.1 (01-02/2023) . - p. 52-55[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23894 - Périodique Bibliothèque principale Documentaires Disponible A paradigm shift from decorative to multifunctional coatings / Anshika Sachan in PAINTINDIA, Vol. LXVI, N° 5 (05/2016)
PermalinkUne peinture pour dépolluer l'air intérieur / Florence Martinache in DOUBLE LIAISON, N° 592 (05/2013)
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