{"id":276024,"date":"2024-12-03T12:33:18","date_gmt":"2024-12-03T11:33:18","guid":{"rendered":"https:\/\/www.tdma.info\/les-smartphones-autonettoyants-et-la-science-qui-les-sous-tend\/"},"modified":"2025-11-21T13:30:24","modified_gmt":"2025-11-21T12:30:24","slug":"les-smartphones-autonettoyants-et-la-science-qui-les-sous-tend","status":"publish","type":"page","link":"https:\/\/www.tdma.info\/fr\/applications-du-dioxyde-de-titane\/les-smartphones-autonettoyants-et-la-science-qui-les-sous-tend\/","title":{"rendered":"Les smartphones autonettoyants et la science qui les sous-tend"},"content":{"rendered":"

[et_pb_section fb_built=\u00a0\u00bb1″ _builder_version=\u00a0\u00bb4.27.3″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb background_color=\u00a0\u00bb#efeded\u00a0\u00bb custom_padding=\u00a0\u00bb10px||10px||true|false\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_row _builder_version=\u00a0\u00bb4.27.3″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_column type=\u00a0\u00bb4_4″ _builder_version=\u00a0\u00bb4.27.3″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_text _builder_version=\u00a0\u00bb4.27.3″ _dynamic_attributes=\u00a0\u00bbcontent\u00a0\u00bb _module_preset=\u00a0\u00bbdefault\u00a0\u00bb header_font_size=\u00a0\u00bb30px\u00a0\u00bb header_font_size_tablet=\u00a0\u00bb30px\u00a0\u00bb header_font_size_phone=\u00a0\u00bb20px\u00a0\u00bb header_font_size_last_edited=\u00a0\u00bbon|phone\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb]@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF90aXRsZSIsInNldHRpbmdzIjp7ImJlZm9yZSI6IjxoMT4iLCJhZnRlciI6IjwvaDE+IiwiZW5hYmxlX2h0bWwiOiJvZmYifX0=@[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=\u00a0\u00bb1″ _builder_version=\u00a0\u00bb4.27.3″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb custom_padding=\u00a0\u00bb0px|||||\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_row column_structure=\u00a0\u00bb3_4,1_4″ use_custom_gutter=\u00a0\u00bbon\u00a0\u00bb gutter_width=\u00a0\u00bb2″ _builder_version=\u00a0\u00bb4.27.3″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb locked=\u00a0\u00bboff\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_column type=\u00a0\u00bb3_4″ _builder_version=\u00a0\u00bb4.27.3″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb custom_padding=\u00a0\u00bb||30px||false|false\u00a0\u00bb border_width_bottom=\u00a0\u00bb1px\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_image src=\u00a0\u00bbhttps:\/\/www.tdma.info\/wp-content\/uploads\/2025\/11\/shutterstock_2461989621-1-scaled.jpg\u00a0\u00bb force_fullwidth=\u00a0\u00bbon\u00a0\u00bb _builder_version=\u00a0\u00bb4.27.4″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb custom_padding=\u00a0\u00bb||20px||false|false\u00a0\u00bb hover_enabled=\u00a0\u00bb0″ global_colors_info=\u00a0\u00bb{}\u00a0\u00bb title_text=\u00a0\u00bbshutterstock_2461989621″ sticky_enabled=\u00a0\u00bb0″][\/et_pb_image][et_pb_text _builder_version=\u00a0\u00bb4.27.4″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb header_3_font=\u00a0\u00bbNoto Sans|600|||||||\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb]<\/p>\n

Le dioxyde de titane (TiO2<\/sub>) sera l\u2019un des ingr\u00e9dients majeurs de la prochaine innovation dans le monde de la t\u00e9l\u00e9phonie mobile : des smartphones autonettoyants. Mais pas que, puisqu\u2019il entrera \u00e9galement dans la composition de fen\u00eatres et autres surfaces autonettoyantes.<\/h3>\n

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M\u00eame si cela para\u00eet relever de la science-fiction, l\u2019id\u00e9e d\u2019un mat\u00e9riau autonettoyant n\u2019est pas nouvelle. Des rev\u00eatements hydrophobes (imperm\u00e9ables \u00e0 l\u2019eau) aux substances qui repoussent les mol\u00e9cules huileuses, de nombreuses m\u00e9thodes permettent de produire des mat\u00e9riaux autonettoyants. Et le dioxyde de titane (TiO2<\/sub>) est en passe de devenir le chef de file des substances autonettoyantes.<\/p>\n

Ajouter des nanoparticules de dioxyde de titane TiO2<\/sub> \u00e0 un mat\u00e9riau peut lui conf\u00e9rer des propri\u00e9t\u00e9s autonettoyantes, car ce compos\u00e9 est, sous cette forme, un photocatalyseur; gr\u00e2ce \u00e0 l\u2019action de la lumi\u00e8re, il initie une r\u00e9action chimique qui vient \u00e0 bout de la poussi\u00e8re et de la salet\u00e9.<\/p>\n

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Comment les smartphones autonettoyants exploitent l\u2019\u00e9nergie du soleil<\/h3>\n

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Le rayonnement solaire est l\u2019ensemble des ondes \u00e9lectromagn\u00e9tiques \u00e9mises par le soleil, y compris les ultraviolets (UV), les infrarouges et la lumi\u00e8re visible. La plupart des UV sont filtr\u00e9s par les diff\u00e9rentes couches de l\u2019atmosph\u00e8re avant d\u2019arriver sur Terre, mais une infime partie nous parvient. <\/p>\n

Quand ces UV atteignent le dioxyde de titane, ils causent une r\u00e9action \u00e9lectrochimique qui active le compos\u00e9, produisant des radicaux libres.<\/p>\n

Les radicaux libres peuvent d\u00e9composer les polluants et d\u00e9grader les micro-organismes, les bact\u00e9ries, les champignons et les virus avant de se disperser.<\/p>\n

[\/et_pb_text][difl_divider separetor_type=\u00a0\u00bbno\u00a0\u00bb divider_line_color=\u00a0\u00bb#000000″ divider_line_width=\u00a0\u00bb1px\u00a0\u00bb _builder_version=\u00a0\u00bb4.27.4″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][\/difl_divider][et_pb_image src=\u00a0\u00bbhttps:\/\/www.tdma.info\/wp-content\/uploads\/2025\/11\/shutterstock_1924250414-scaled.jpg\u00a0\u00bb force_fullwidth=\u00a0\u00bbon\u00a0\u00bb _builder_version=\u00a0\u00bb4.27.4″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb hover_enabled=\u00a0\u00bb0″ global_colors_info=\u00a0\u00bb{}\u00a0\u00bb title_text=\u00a0\u00bbshutterstock_1924250414″ sticky_enabled=\u00a0\u00bb0″][\/et_pb_image][et_pb_text _builder_version=\u00a0\u00bb4.27.4″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb header_3_font=\u00a0\u00bbNoto Sans|600|||||||\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb]<\/p>\n

Des surfaces \u00e0 nettoyabilit\u00e9 accrue<\/h3>\n

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En outre, comme le fait remarquer le Professeur Michael Verg\u00f6hl de l\u2019institut allemand Fraunhofer IST<\/a>, \u00absi vous appliquez une fine pellicule de dioxyde de titane sur une surface en verre, comme l\u2019\u00e9cran d\u2019un smartphone, les traces de doigts et de gras disparaissent peu \u00e0 peu de l\u2019\u00e9cran, sans aucune intervention ext\u00e9rieure.\u00bb<\/p>\n

Cela signifie donc qu\u2019un rev\u00eatement compos\u00e9 de nanoparticules de TiO2<\/sub> peut faciliter le nettoyage manuel et permettre de nettoyer plus efficacement les surfaces difficiles \u00e0 nettoyer, comme les fen\u00eatres d\u2019un gratte-ciel.<\/p>\n

Les chercheurs du monde entier s\u2019int\u00e9ressent \u00e0 la cr\u00e9ation de rev\u00eatements qui pourront servir \u00e0 diff\u00e9rentes applications, des fen\u00eatres d\u2019immeubles qui b\u00e9n\u00e9ficient d\u2019une excellente luminosit\u00e9 naturelle aux surfaces de travail que l\u2019on retrouve dans les h\u00f4pitaux, sans oublier les cuisines qui pourraient \u00eatre expos\u00e9es aux rayons UV. L\u2019entreprise canadienne NanoFixIt a mis au point un liquide protecteur d\u2019\u00e9crans gr\u00e2ce aux propri\u00e9t\u00e9s autonettoyantes du TiO2<\/sub>.<\/p>\n

[\/et_pb_text][difl_divider separetor_type=\u00a0\u00bbno\u00a0\u00bb divider_line_color=\u00a0\u00bb#000000″ divider_line_width=\u00a0\u00bb1px\u00a0\u00bb _builder_version=\u00a0\u00bb4.27.4″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][\/difl_divider][et_pb_image src=\u00a0\u00bbhttps:\/\/www.tdma.info\/wp-content\/uploads\/2025\/11\/shutterstock_2440604815-scaled.jpg\u00a0\u00bb force_fullwidth=\u00a0\u00bbon\u00a0\u00bb _builder_version=\u00a0\u00bb4.27.4″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb hover_enabled=\u00a0\u00bb0″ global_colors_info=\u00a0\u00bb{}\u00a0\u00bb title_text=\u00a0\u00bbshutterstock_2440604815″ sticky_enabled=\u00a0\u00bb0″][\/et_pb_image][et_pb_text _builder_version=\u00a0\u00bb4.27.4″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb header_3_font=\u00a0\u00bbNoto Sans|600|||||||\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb]<\/p>\n

Des applications r\u00e9volutionnaires<\/h3>\n

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Il est \u00e9galement possible d\u2019int\u00e9grer les particules aux tissus pour cr\u00e9er des v\u00eatements aux propri\u00e9t\u00e9s autonettoyantes. Des rev\u00eatements en dioxyde de titane pourraient aussi \u00eatre utilis\u00e9s sur des meubles de jardin qui, \u00e0 force de rester dehors l\u2019hiver, deviennent vite sales ; le simple retour des beaux jours permettrait alors de les nettoyer, selon les chercheurs de Fraunhofer. <\/p>\n

Mais que se passe-t-il quand le soleil n\u2019est pas au rendez-vous ? De nombreuses \u00e9tudes sugg\u00e8rent que l\u2019ajout d\u2019autres \u00e9l\u00e9ments pourrait accro\u00eetre l\u2019efficacit\u00e9 des nanoparticules. <\/p>\n

\u00abEn quelques d\u00e9cennies, nous avons assist\u00e9 \u00e0 des progr\u00e8s scientifiques impressionnants qui ont permis d\u2019augmenter les propri\u00e9t\u00e9s d\u2019absorption de la lumi\u00e8re visible par le TiO2<\/sub>. En dopant diff\u00e9rents \u00e9l\u00e9ments chimiques, tels l\u2019azote, le soufre et la fluorine, nous sommes parvenus \u00e0 accro\u00eetre l\u2019efficacit\u00e9 des mat\u00e9riaux lorsque le ciel est voil\u00e9\u00bb, explique Mallikarjuna Nadagouda, chercheur \u00e0 l\u2019Agence am\u00e9ricaine de protection de l\u2019environnement.<\/p>\n

M. Nadagouda et ses coll\u00e8gues ont publi\u00e9 un article<\/a> dans lequel ils passent en revue les publications traitant du TiO2<\/sub>. Ils en ont conclu que les surfaces antibact\u00e9riennes compos\u00e9es de TiO2<\/sub> pourraient \u00eatre utilis\u00e9es dans les h\u00f4pitaux, ainsi que dans le secteur de l\u2019agro-alimentaire, de la c\u00e9ramique et de la construction.<\/p>\n

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Une technologie en cours de d\u00e9veloppement<\/h3>\n

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Le dioxyde de titane TiO2<\/sub>, lorsqu\u2019il est soumis \u00e0 un \u00e9clairage ultraviolet comme celui \u00e9mis par le soleil, subit un processus d\u2019oxydation avanc\u00e9e (POA) permettant le traitement des eaux.<\/p>\n

Les techniques d\u2019oxydation avanc\u00e9e permettent de traiter efficacement les eaux us\u00e9es, mais M. Nadagouda estime qu\u2019elles doivent \u00eatre perfectionn\u00e9es avant que leur application puisse \u00eatre \u00e9largie. Il faut notamment s\u2019employer \u00e0 pr\u00e9venir l\u2019\u00e9mission de TiO2<\/sub> des surfaces et mat\u00e9riaux qui en contiennent et apprendre \u00e0 mieux ma\u00eetriser ses propri\u00e9t\u00e9s autonettoyantes uniques.<\/p>\n

\u00abLe consensus est qu\u2019une fois ces probl\u00e9matiques r\u00e9solues, les champs d\u2019application du TiO2<\/sub> seront \u00e9largis de fa\u00e7on concr\u00e8te \u00e0 de nombreux secteurs\u00bb, conclut M. Nadagouda.<\/p>\n

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Lire la suite<\/span><\/a><\/div><\/div><\/div><\/div><\/div><\/div>[\/et_pb_code][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"

Le dioxyde de titane (TiO2) sera l\u2019un des ingr\u00e9dients majeurs de la prochaine innovation dans le monde de la t\u00e9l\u00e9phonie mobile : des smartphones autonettoyants. Mais pas que, puisqu\u2019il entrera \u00e9galement dans la composition de fen\u00eatres et autres surfaces autonettoyantes.M\u00eame si cela para\u00eet relever de la science-fiction, l\u2019id\u00e9e d\u2019un mat\u00e9riau autonettoyant n\u2019est pas nouvelle. Des […]<\/p>\n","protected":false},"author":1,"featured_media":280548,"parent":276369,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","inline_featured_image":false,"footnotes":""},"difl_page_category":[],"application_category":[86,82],"class_list":["post-276024","page","type-page","status-publish","has-post-thumbnail","hentry","application_category-paint-coatings-fr","application_category-health-and-beauty-fr"],"yoast_head":"\nLes smartphones autonettoyants et la science qui les sous-tend - TDMA<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.tdma.info\/fr\/applications-du-dioxyde-de-titane\/les-smartphones-autonettoyants-et-la-science-qui-les-sous-tend\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Les smartphones autonettoyants et la science qui les sous-tend - TDMA\" \/>\n<meta property=\"og:description\" content=\"Le dioxyde de titane (TiO2) sera l\u2019un des ingr\u00e9dients majeurs de la prochaine innovation dans le monde de la t\u00e9l\u00e9phonie mobile : des smartphones autonettoyants. 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