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Thermochromism for smart leathers / Vairaperumal Tamilmani in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 6 (06/2015)
[article]
Titre : Thermochromism for smart leathers Type de document : texte imprimé Auteurs : Vairaperumal Tamilmani, Auteur ; Dimple Kanadasan, Auteur ; R. Muthazhagan, Auteur ; Kalarical Janardhanan Sreeram, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Balachandran Unni Nair, Auteur Année de publication : 2015 Article en page(s) : p. 161-164 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuir
Cuirs et peaux -- Finition
Formulation (Génie chimique)
Matériaux intelligents
Pigments inorganiques
ThermochromieIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The Leather industry globally is poised for enhancing the unit value realization. With availability of raw material remaining more or less constant, conferring customer desired smart properties to leather enhances the value of leather. It is also quite pos-sible that such new features would enable leather to enter unexplored territories such as those envisaged for smarter textiles. An innovation in visual stimulus creates immediate appeal and utility, leading to consumer perception of owning it. A survey of such stimulus-based innovations of immediate appeal to people indicated a preference to thermochromism – a reversible color change influenced by temperature. While such applications are predominantly associated with sensor applications, the same as a concept for leather has not yet emerged. This paper reports synthesis of a rare earth doped transition metal complex that had a color shift from pale pink to dark green in the temperature range of 200 – 210°C. This colorant could be applied through con-ventional finishing techniques on leather and is envisaged to have applications in safety products such as heat resistant gloves. Note de contenu : - EXPERIMENTAL : Materials and methods - Synthesis of the complex - Product characterization - Application trials
- RESULTS AND DISCUSSION : Application of thermochromic pigment in finishing of leatherEn ligne : https://drive.google.com/file/d/1irvOfoAyxdJ-pKNPiBFdmXlZ_agXAsej/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24230
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Code-barres Cote Support Localisation Section Disponibilité 17260 - Périodique Bibliothèque principale Documentaires Disponible Thermochromism technology in paint : A review / Dashrath Gangaram Salvi in PAINTINDIA, Vol. LXXI, N° 7 (07/2021)
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Titre : Thermochromism technology in paint : A review Type de document : texte imprimé Auteurs : Dashrath Gangaram Salvi, Auteur Année de publication : 2021 Article en page(s) : p. 70-78 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Pigments
Revêtements:Peinture
ThermochromieIndex. décimale : 667.6 Peintures Résumé : Thermochromism is the property of substances to change color due to a change in temperature. A mood ring is an excellent example of this phenomenon, but thermochromism also has more practical uses, such as baby bottles which change to a different color when cool enough to drink, or kettles which change when water is at or near boiling point. Thermochromism is one of several types of ch romism
Thermochromic pigments are sensitive to temperature. They change colour when they are heated up or cooled down. This property is useful for indicating if the drink in a cup is hot, or if the water in a kettle is hot. Phosphorescent pigments glow in the dark. They are able to absorb light energy and store it.
Thermochromic paints use liquid crystals or leuco dye technology. After absorbing a certain amount of light or heat, the crystallic or molecular structure of the pigment reversibly changes in such a way that it absorbs and emits light at a different wavelength than at lowertemperatures.
A mood ring shown face front, showing a band of green color change across a brown background.Note de contenu : - ORGANIC MATERIALS : Thermochromatic liquid crystals - Leuco dyes - How thermochromic liquid crystals work - How leucodyes work - Polymers - Thermochromic polymer systems based on bragg reflection - Liquid crystalline polymers with thermochromic properties - Thermochromic gel networks based on bragg reflection - Thermochromic polymer systems based on the absorption of light conjugated polymers - Gel networks - Inorganic thermochromic material - Irreversible inorganic thermochromes - Application of thermochromic technology
- Table 1 : Generic types of thermochromic polymers classified by the effect on light
- Fig. 1 : Molecular structure of the acrylates C6M and CBC
- Fig. 2 : Thermochromic switching from blue to colorless of a thermoplastic polymer foil
- Fig. 4 : Proton-transfer equilibrium between the phenol and phenolate form of the indicator dye 2,6-diphenyl-4-(2,4,6-triphenyl-1-pyridino)-phenol
- Fig. 5 : Thermochromic switching of a 3-mm-thick Cresol Red containing PVA/borax/surfactanthydrogel layer placed between two glass plates
- Fig. 6 : Visible absorption spectra of a 2,6-dipheny1-4-(2,4,6-tripheny1-1-pyridino)-phenolate containing PVA/borax/surfactant hydrogel in dependence on temperature (d = 1 cm). 100C (A); 20.0 (B); 30°C (C); 40.0 (D); 50.0 (E); 60.0 (F); 700C (G); 800C (H)
- Fig. 7 : UV-vis absorption spectra of a Cresol Red containing PVA/borax/surfactant hydrogel in dependence on temperature (d = 1 cm). 160C (A); 600C (B); 80.0
- Fig. 14 : Switching behavior of a sun protecting glazing (100 x 50 cm) containing a 2-mm-thick thermotropic hydrogel layer at 20.0 slightly above the switching temperature of 30.0En ligne : https://drive.google.com/file/d/1XPp0wItymGTheYsoucbfVO5Wy_fINow7/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36309
in PAINTINDIA > Vol. LXXI, N° 7 (07/2021) . - p. 70-78[article]Réservation
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