{"id":440068,"date":"2023-12-28T17:00:17","date_gmt":"2023-12-28T16:00:17","guid":{"rendered":"https:\/\/www.eenewseurope.com\/?p=440068"},"modified":"2023-12-28T17:00:17","modified_gmt":"2023-12-28T16:00:17","slug":"fibre-conductrice-a-base-de-coton-pour-textiles-intelligents","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/fibre-conductrice-a-base-de-coton-pour-textiles-intelligents\/","title":{"rendered":"Fibre conductrice \u00e0 base de coton pour textiles intelligents"},"content":{"rendered":"<h2>L&rsquo;universit\u00e9 de l&rsquo;\u00c9tat de Washington a mis au point un brin de fibre unique qui a la souplesse du coton et la conductivit\u00e9 \u00e9lectrique d&rsquo;un polym\u00e8re, appel\u00e9 polyaniline.<\/h2>\n<p>La fibre nouvellement d\u00e9velopp\u00e9e a montr\u00e9 un bon potentiel pour les e-textiles portables. Les chercheurs de la WSU ont test\u00e9 les fibres avec un syst\u00e8me qui alimentait une lumi\u00e8re LED et un autre qui d\u00e9tectait le gaz ammoniac, d\u00e9taillant leurs r\u00e9sultats dans la revue Carbohydrate Polymers.<\/p>\n<p>\u00ab\u00a0Nous disposons d&rsquo;une fibre en deux sections : une section est le coton conventionnel, suffisamment souple et solide pour un usage quotidien, et l&rsquo;autre est le mat\u00e9riau conducteur\u00a0\u00bb, explique Hang Liu, chercheur en textile \u00e0 la WSU et auteur correspondant de l&rsquo;\u00e9tude. \u00ab\u00a0Le coton peut supporter le mat\u00e9riau conducteur qui peut fournir la fonction requise.<\/p>\n<p>Bien que d&rsquo;autres d\u00e9veloppements soient n\u00e9cessaires, l&rsquo;id\u00e9e est d&rsquo;int\u00e9grer des fibres de ce type dans les v\u00eatements en tant que patchs de capteurs avec des circuits flexibles. Ces patchs pourraient \u00eatre int\u00e9gr\u00e9s aux uniformes des pompiers, des soldats ou des travailleurs qui manipulent des produits chimiques afin de d\u00e9tecter les expositions dangereuses. Parmi les autres applications, citons le suivi de la sant\u00e9 ou les v\u00eatements de sport qui peuvent faire plus que les moniteurs de fitness actuels.<\/p>\n<p>\u00ab\u00a0Nous disposons de certains wearables intelligents, comme les montres intelligentes, qui peuvent suivre vos mouvements et les signes vitaux humains, mais nous esp\u00e9rons qu&rsquo;\u00e0 l&rsquo;avenir vos v\u00eatements de tous les jours pourront \u00e9galement remplir ces fonctions\u00a0\u00bb, a d\u00e9clar\u00e9 M. Liu. \u00ab\u00a0La mode ne se r\u00e9sume pas \u00e0 la couleur et au style, comme beaucoup de gens le pensent : la mode est une science.<\/p>\n<p>Dans cette \u00e9tude, l&rsquo;\u00e9quipe de la WSU s&rsquo;est efforc\u00e9e de surmonter les difficult\u00e9s li\u00e9es au m\u00e9lange du polym\u00e8re conducteur avec la cellulose de coton. Les polym\u00e8res sont des substances compos\u00e9es de tr\u00e8s grosses mol\u00e9cules qui pr\u00e9sentent des motifs r\u00e9p\u00e9titifs. Dans ce cas, les chercheurs ont utilis\u00e9 la polyaniline, \u00e9galement connue sous le nom de PANI, un polym\u00e8re synth\u00e9tique aux propri\u00e9t\u00e9s conductrices d\u00e9j\u00e0 utilis\u00e9 dans des applications telles que la fabrication de circuits imprim\u00e9s.<\/p>\n<p>Bien qu&rsquo;intrins\u00e8quement conductrice, la polyaniline est fragile et ne peut \u00eatre transform\u00e9e en fibre textile. Pour r\u00e9soudre ce probl\u00e8me, les chercheurs de la WSU ont dissous la cellulose de coton provenant de t-shirts recycl\u00e9s dans une solution et le polym\u00e8re conducteur dans une autre solution s\u00e9par\u00e9e. Ces deux solutions ont ensuite \u00e9t\u00e9 fusionn\u00e9es c\u00f4te \u00e0 c\u00f4te et le mat\u00e9riau a \u00e9t\u00e9 extrud\u00e9 pour former une fibre.<\/p>\n<p>Le r\u00e9sultat a montr\u00e9 une bonne liaison interfaciale, ce qui signifie que les mol\u00e9cules des diff\u00e9rents mat\u00e9riaux resteraient ensemble en cas d&rsquo;\u00e9tirement et de flexion.<\/p>\n<p>L&rsquo;obtention du bon m\u00e9lange \u00e0 l&rsquo;interface de la cellulose de coton et de la polyaniline a \u00e9t\u00e9 un \u00e9quilibre d\u00e9licat, a d\u00e9clar\u00e9 M. Liu.<\/p>\n<p>\u00ab\u00a0Nous voulions que ces deux solutions fonctionnent de mani\u00e8re \u00e0 ce que, lorsque le coton et le polym\u00e8re conducteur entrent en contact, ils se m\u00e9langent dans une certaine mesure pour se coller l&rsquo;un \u00e0 l&rsquo;autre, mais nous ne voulions pas qu&rsquo;ils se m\u00e9langent trop, sinon la conductivit\u00e9 aurait \u00e9t\u00e9 r\u00e9duite\u00a0\u00bb, a-t-elle d\u00e9clar\u00e9.<\/p>\n<p>Les autres auteurs de la WSU qui ont particip\u00e9 \u00e0 cette \u00e9tude sont Wangcheng Liu, premier auteur, ainsi que Zihui Zhao, Dan Liang, Wei-Hong Zhong et Jinwen Zhang. Cette recherche a b\u00e9n\u00e9fici\u00e9 du soutien de la National Science Foundation et du Walmart Foundation Project.<\/p>\n<p><em>Image : Image microscopique des fibres nouvellement d\u00e9velopp\u00e9es montrant leur m\u00e9lange c\u00f4te \u00e0 c\u00f4te o\u00f9 une face est en coton et l&rsquo;autre contient le polym\u00e8re de polyanaline qui peut transporter un courant \u00e9lectrique. Avec l&rsquo;aimable autorisation de l&rsquo;universit\u00e9 de l&rsquo;\u00c9tat de Washington.<\/em><\/p>\n<p><a href=\"https:\/\/doi.org\/10.1016\/j.carbpol.2023.121308\">https:\/\/doi.org\/10.1016\/j.carbpol.2023.121308<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Des chercheurs mettent au point un brin de fibre unique qui a la souplesse du coton et la conductivit\u00e9 \u00e9lectrique d&rsquo;un polym\u00e8re.<\/p>\n","protected":false},"author":34,"featured_media":439978,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[883],"tags":[5499,5500,914],"domains":[47],"ppma_author":[1153,3682],"class_list":["post-440068","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technologies","tag-e-textiles-fr","tag-polyaniline-fr","tag-wearables-fr","domains-electronique-eci"],"acf":[],"yoast_head":"<title>Fibre conductrice \u00e0 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