Acoustic fabric converts audible sounds into electrical signals / Jennifer Chu in TECHNICAL TEXTILES, Vol. 65, N° 4 (10/2022)  

[article]  inTECHNICAL TEXTILES > Vol. 65, N° 4 (10/2022) . - p. 216-217 Titre : Acoustic fabric converts audible sounds into electrical signals Type de document : texte imprimé Auteurs : Jennifer Chu, Auteur Année de publication : 2022 Article en page(s) : p. 216-217 Langues : Multilingue (mul) Catégories : Matériaux -- Propriétés acoustiques Ondes acoustiques de surface Signaux électriques Son -- Conversion Textiles et tissus Index. décimale : 677 Textiles Résumé : Having trouble hearing ? Just turn up your shirt. That is the idea behind a new "acoustic fabric" developed by engineers at the Massachusetts Institute ofTechnology (MIT), Cambridge, MA/USA, and collaborators at Rhode Island School of Design (RISD), Providence, RI/USA. The team has designed a fabric that works like a microphone, converting sound first into mechanical vibrations, then into electrical signais, similarly to how the human ears hear. All fabrics vibrate in response to audible sounds, though these vibrations are on the scale of nanometers — far too small to ordinarily be sensed. To capture these imperceptible signais, the researchers created a flexible fiber that, when woven into a fabric, bends with the fabric like seaweed on the ocean's surface. Note de contenu : - Sound layering - Lightweight listening - Fig. 1 : The fiber was woven with yarns to produce panels of drapable, machine-washable fabrics - Fig. 2 : The acoustic fiber can be woven with conventinal yarns using a traditional loom En ligne : https://drive.google.com/file/d/13fx4yQDD-K3kUFBqhs52sHhi6UW127iA/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38555 [article]

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High performance polymers derived from biobased resources / Jeffrey Danneman in COATINGS TECH, Vol. 13, N° 9 (09/2016)  

[article]  inCOATINGS TECH > Vol. 13, N° 9 (09/2016) . - p. 30-39 Titre : High performance polymers derived from biobased resources Type de document : texte imprimé Auteurs : Jeffrey Danneman, Auteur ; Jennifer Chu, Auteur Année de publication : 2016 Article en page(s) : p. 30-39 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biomatériaux Formulation (Génie chimique) Liants Polyalkydes Polymères hautes performances Polyuréthanes Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : Incorporating significant biobased content into coating binders is best accomplished via vegetable oil-modified polyester or polyurethane polymers. This allows a biobased content of 34-68% for current commercially available products designed for various end uses. Providing these polymers as a latex or dispersion in water allows for formulations at VOC content well below the lowest established AIM limits worldwide. That these unsaturated oils crosslink to form thermoset films provides a level of performance that easily competes with thermoplastic fossil fuel-based binders. In addition to the low VOC and desirable performance, these polymers can be used in coatings that are favored in government purchases through the USDA BioPreferred' Program. They enjoy the marketing advantage of displaying the USDA Certified Biobased Product label. Note de contenu : U.S. DEPARTMENT OF AGRICULTURE BIOPREFERRED PROGRAM : Mandatory federal purchasing - Voluntary labeling - Achievements - BIOBASED POLYMERS - POLYURETHANE POLYMERS - ALKYD POLYMERS - TABLES : 1. Performance of biobased polyurethanes for flooring - 2. Performance of wet-look on porous cementitious and stone substrates - 3. Asphalt sealer formulation, Pounds/100 Gallons - 4. QUV exposure of alkyd latex alphalt sealers with variable pigmentation - 5. Chemical resistance of several asphalt sealer formulations - 6. Asphalt sealer resistance to color tracking and re-emulsification : color transfer - 7. Pigment binding of metal primers - 8. Heat aged stability of alkyd latex and formulated metal primers - 9. Durability and retro-reflectivity of several traffic coatings En ligne : https://drive.google.com/file/d/1v1YIwKB_UWE-7sqCs-_2Q9mx9Q9LkcDw/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27047 [article]

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