{"id":4243,"date":"2025-06-23T12:07:54","date_gmt":"2025-06-23T04:07:54","guid":{"rendered":"https:\/\/www.powdergrindingmill.com\/?p=4243"},"modified":"2025-06-23T13:11:59","modified_gmt":"2025-06-23T05:11:59","slug":"the-four-faces-of-silica-microspheres","status":"publish","type":"post","link":"https:\/\/www.powdergrindingmill.com\/fr\/the-four-faces-of-silica-microspheres\/","title":{"rendered":"Les \u00ab quatre faces \u00bb des microsph\u00e8res de silice"},"content":{"rendered":"<p><a href=\"https:\/\/www.powdergrindingmill.com\/fr\/products\/\">Microbilles <\/a>se r\u00e9f\u00e8rent \u00e0 <a href=\"https:\/\/www.powdergrindingmill.com\/fr\/dry-grinding\/fluidized-bed-opposed-air-jet-mill\/\">particules sph\u00e9riques <\/a>avec une gamme de tailles allant du micro au nano, et elles sont largement utilis\u00e9es comme mat\u00e9riaux composites. Elles ont attir\u00e9 une attention significative en raison de leur grande surface sp\u00e9cifique, de leur structure m\u00e9canique stable, de leur modifiabilit\u00e9 et de leur forte capacit\u00e9 d'adsorption. Parmi elles, les microbilles de silice sont devenues l'un des mat\u00e9riaux les plus matures et largement utilis\u00e9s en recherche. <a href=\"https:\/\/www.powdergrindingmill.com\/fr\/dry-grinding\/air-classifying-mill\/\">Microbilles de silice<\/a> pr\u00e9sentent une grande surface sp\u00e9cifique, une faible constante di\u00e9lectrique, un faible coefficient d'expansion et une forte adsorption. Elles pr\u00e9sentent \u00e9galement une excellente stabilit\u00e9 chimique, une r\u00e9sistance aux chocs thermiques et une dispersion facile, ce qui leur permet de se d\u00e9marquer parmi d'autres types de microbilles.<\/p>\n\n\n\n<p>En se basant sur les caract\u00e9ristiques structurales des microbilles de SiO2, elles peuvent \u00eatre class\u00e9es en quatre types : microbilles non poreuses, microbilles \u00e0 noyau et coque, microbilles creuses et microbilles poreuses.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Les microbilles non poreuses ont une structure compl\u00e8tement solide et non poreuse.<\/li>\n\n\n\n<li>Les microbilles creuses ont une structure en cavit\u00e9 au centre.<\/li>\n\n\n\n<li>Les microbilles \u00e0 noyau et coque consistent en un noyau solide \u00e0 l'int\u00e9rieur et une coque poreuse \u00e0 l'ext\u00e9rieur.<\/li>\n\n\n\n<li>Les microbilles poreuses ont de nombreux pores \u00e0 la surface ou \u00e0 l'int\u00e9rieur de la microbille.<\/li>\n<\/ul>\n\n\n\n<p>\u00c9tant donn\u00e9 que les microbilles de SiO2 ont des structures vari\u00e9es, leurs m\u00e9thodes de pr\u00e9paration sont \u00e9galement diverses, notamment : s\u00e9chage par pulv\u00e9risation, m\u00e9thode sol-gel, m\u00e9thode de mod\u00e8le dur, m\u00e9thode de mod\u00e8le souple, m\u00e9thode en phase gazeuse, m\u00e9thode d'\u00e9mulsion micro, m\u00e9thode de d\u00e9p\u00f4t chimique, polym\u00e9risation par \u00e9mulsion, m\u00e9thode hydrothermale, et autres.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"397\" height=\"338\" src=\"https:\/\/www.powdergrindingmill.com\/wp-content\/uploads\/2025\/06\/SiO2-microspheres-with-various-structures.webp\" alt=\"Microbilles de SiO2 avec diverses structures\" class=\"wp-image-4244\" srcset=\"https:\/\/www.powdergrindingmill.com\/wp-content\/uploads\/2025\/06\/SiO2-microspheres-with-various-structures.webp 397w, https:\/\/www.powdergrindingmill.com\/wp-content\/uploads\/2025\/06\/SiO2-microspheres-with-various-structures-300x255.webp 300w\" sizes=\"(max-width: 397px) 100vw, 397px\" \/><\/figure>\n\n\n\n<p><strong>(a) Structure solide (b) Structure noyau-coque (c) Structure creuse (d) Structure poreuse<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Microbilles non poreuses<\/h2>\n\n\n\n<p>Les microbilles de silice non poreuses ont une bonne stabilit\u00e9 chimique, hydrophilie et modifiabilit\u00e9. Par cons\u00e9quent, elles sont largement utilis\u00e9es dans la livraison pharmaceutique, la d\u00e9tection biologique, la catalyse, les mat\u00e9riaux optiques et d'autres domaines. De plus, elles ont une grande surface sp\u00e9cifique et une bonne dispersibilit\u00e9, ce qui les rend adapt\u00e9es \u00e0 diverses recherches scientifiques et applications industrielles.<\/p>\n\n\n\n<p>Les microbilles de silice non poreuses peuvent \u00eatre pr\u00e9par\u00e9es par la m\u00e9thode sol-gel et d'autres m\u00e9thodes. Lors de la pr\u00e9paration de microbilles solides, le t\u00e9tra\u00e9thyl orthosilicate (TEOS) est principalement utilis\u00e9 comme source de silicium. Sous l'action d'un acide ou d'une base, la source de silicium subit une hydrolyse et une r\u00e9action de condensation. Le produit de condensation se d\u00e9veloppe en particules sph\u00e9riques sous l'effet de la tension de surface. Par cons\u00e9quent, il existe deux principales raisons \u00e0 la formation de pores dans les microbilles pr\u00e9par\u00e9es. L'une est que le TEOS n'est pas compl\u00e8tement hydrolys\u00e9, laissant du carbone organique r\u00e9siduel, qui forme des pores apr\u00e8s une combustion \u00e0 haute temp\u00e9rature. La seconde est que Si-OH ne parvient pas \u00e0 compl\u00e9ter enti\u00e8rement la r\u00e9action de condensation. Ensuite, des pores sont g\u00e9n\u00e9r\u00e9s, et la taille des pores est petite, ce qui est consid\u00e9r\u00e9 comme des microbilles solides.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"454\" height=\"207\" src=\"https:\/\/www.powdergrindingmill.com\/wp-content\/uploads\/2025\/06\/Scanning-electron-micrographs-of-monodisperse-nonporous-silica-microspheres-different-magnifications.webp\" alt=\"Micrographies \u00e9lectroniques \u00e0 balayage de microsph\u00e8res de silice monodisperses non poreuses (diff\u00e9rentes magnifications)\" class=\"wp-image-4245\" srcset=\"https:\/\/www.powdergrindingmill.com\/wp-content\/uploads\/2025\/06\/Scanning-electron-micrographs-of-monodisperse-nonporous-silica-microspheres-different-magnifications.webp 454w, https:\/\/www.powdergrindingmill.com\/wp-content\/uploads\/2025\/06\/Scanning-electron-micrographs-of-monodisperse-nonporous-silica-microspheres-different-magnifications-300x137.webp 300w\" sizes=\"(max-width: 454px) 100vw, 454px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Microbilles \u00e0 noyau et coque<\/h2>\n\n\n\n<p>Les microbilles de silice \u00e0 noyau et coque se caract\u00e9risent par une haute efficacit\u00e9, une rapidit\u00e9 et une faible contre-pression. Elles sont souvent utilis\u00e9es dans les techniques de s\u00e9paration et d'analyse chromatographique rapides.<br>Les microbilles \u00e0 noyau et coque peuvent \u00eatre pr\u00e9par\u00e9es en combinant la m\u00e9thode sol-gel avec la m\u00e9thode de mod\u00e8le.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"457\" height=\"176\" src=\"https:\/\/www.powdergrindingmill.com\/wp-content\/uploads\/2025\/06\/TEM-and-SEM-images-of-core-shell-microspheres.webp\" alt=\"Images TEM et SEM de microsph\u00e8res \u00e0 noyau et enveloppe\" class=\"wp-image-4246\" srcset=\"https:\/\/www.powdergrindingmill.com\/wp-content\/uploads\/2025\/06\/TEM-and-SEM-images-of-core-shell-microspheres.webp 457w, https:\/\/www.powdergrindingmill.com\/wp-content\/uploads\/2025\/06\/TEM-and-SEM-images-of-core-shell-microspheres-300x116.webp 300w\" sizes=\"(max-width: 457px) 100vw, 457px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Microbilles creuses<\/h2>\n\n\n\n<p>La silice creuse poss\u00e8de une structure en cavit\u00e9 \u00e0 l'int\u00e9rieur. Elle est non toxique, poss\u00e8de un point de fusion \u00e9lev\u00e9 et une stabilit\u00e9, et est facile \u00e0 modifier. Par cons\u00e9quent, elle a de nombreuses applications dans la lib\u00e9ration contr\u00f4l\u00e9e de m\u00e9dicaments, les mat\u00e9riaux r\u00e9fractaires, l'encapsulation de capsules, les nanocatalyseurs, et plus encore.<\/p>\n\n\n\n<p>Les microsph\u00e8res de silice creuse sont principalement pr\u00e9par\u00e9es par la m\u00e9thode du mod\u00e8le. Lors de l'utilisation de la m\u00e9thode du mod\u00e8le pour pr\u00e9parer des microsph\u00e8res creuses, le processus comprend g\u00e9n\u00e9ralement les \u00e9tapes suivantes :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pr\u00e9parer et fonctionnaliser le mod\u00e8le.<\/li>\n\n\n\n<li>Utiliser des m\u00e9thodes physiques ou chimiques pour enrober le mod\u00e8le.<\/li>\n\n\n\n<li>Retirer le mod\u00e8le.<\/li>\n<\/ul>\n\n\n\n<p>Selon le type de mod\u00e8le choisi lors du processus de pr\u00e9paration des microsph\u00e8res, ainsi que ses caract\u00e9ristiques fonctionnelles et sa m\u00e9thode de retrait, la m\u00e9thode du mod\u00e8le peut \u00eatre class\u00e9e en trois types : la m\u00e9thode du mod\u00e8le dur, la m\u00e9thode du mod\u00e8le souple et la m\u00e9thode du mod\u00e8le sacrificiel.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Microsph\u00e8res poreuses<\/h2>\n\n\n\n<p>Les microsph\u00e8res de SiO2 poreuses ont d'excellentes propri\u00e9t\u00e9s, telles que la non-toxicit\u00e9, la r\u00e9sistance \u00e0 haute temp\u00e9rature, des propri\u00e9t\u00e9s physiques et chimiques stables, une grande surface sp\u00e9cifique, des tailles de particules et de pores contr\u00f4lables, et une facilit\u00e9 <a href=\"https:\/\/www.powdergrindingmill.com\/fr\/powder-coating-surface-modification\/\">la modification de surface<\/a>. Ces caract\u00e9ristiques les rendent pr\u00e9cieuses pour des applications en catalyse, chromatographie en phase liquide haute performance, biom\u00e9decine, biosenseurs et cosm\u00e9tiques.<\/p>\n\n\n\n<p>L'Union Internationale de Chimie Pure et Appliqu\u00e9e (UICPA) classe les mat\u00e9riaux poreux en fonction de la taille des pores. Les pores inf\u00e9rieurs \u00e0 2 nm sont appel\u00e9s micropores. Les pores entre 2 et 50 nm sont appel\u00e9s m\u00e9sopores, et les pores sup\u00e9rieurs \u00e0 50 nm sont appel\u00e9s macropores.<\/p>\n\n\n\n<p>Les microsph\u00e8res de SiO2 poreuses sont des structures enti\u00e8rement poreuses. Elles incluent des microsph\u00e8res de SiO2 microporeuses, m\u00e9soporeuses et macroporeuses.<\/p>\n\n\n\n<p>Les principales m\u00e9thodes de pr\u00e9paration de ces microsph\u00e8res incluent la m\u00e9thode du mod\u00e8le bas\u00e9e sur la m\u00e9thode sol-gel, et la m\u00e9thode d'agr\u00e9gation collo\u00efdale induite par la polym\u00e9risation (PICA).<\/p>\n\n\n\n<p>Lors de l'utilisation de la m\u00e9thode du mod\u00e8le, les co\u00fbts de production \u00e9lev\u00e9s et la complexit\u00e9 des r\u00e9actions limitent son application industrielle. Le processus de r\u00e9action est difficile \u00e0 contr\u00f4ler, et la reproductibilit\u00e9 est faible.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p>Les microsph\u00e8res de silice sont devenues des mat\u00e9riaux fonctionnels importants en raison de leur structure unique et de leurs performances exceptionnelles. Elles ont quatre structures principales : non poreuses, \u00e0 noyau et enveloppe, creuses et poreuses. Chaque structure poss\u00e8de ses propres caract\u00e9ristiques de pr\u00e9paration et sa valeur d'application.<\/p>\n\n\n\n<p>Bien que certaines m\u00e9thodes de pr\u00e9paration pr\u00e9sentent des limitations de co\u00fbt ou de processus, les microsph\u00e8res de silice continuent de stimuler le d\u00e9veloppement innovant de la science des mat\u00e9riaux. Elles jouent \u00e9galement un r\u00f4le important dans les domaines interdisciplinaires, gr\u00e2ce \u00e0 leurs structures et fonctions modulables.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Comment r\u00e9duire la taille des particules de Carbure de silicium par Jet Mill, EPIC Powder\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/cSp9i9DfjVA?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><a href=\"https:\/\/www.powdergrindingmill.com\/fr\/contact\/\">Poudre \u00e9pique <\/a><\/h2>\n\n\n\n<p>, plus de 20 ans d'exp\u00e9rience dans l'industrie de la poudre ultrafine. Promouvoir activement le d\u00e9veloppement futur de la poudre ultrafine, en se concentrant sur le broyage, la classification et la modification de la poudre ultrafine. Contactez-nous pour une consultation gratuite et des solutions personnalis\u00e9es ! Notre \u00e9quipe d'experts s'engage \u00e0 fournir des produits et services de haute qualit\u00e9 pour maximiser la valeur de votre traitement de poudre. Epic Powder\u2014Votre expert de confiance en traitement de poudre !<\/p>\n\n\n\n<div class=\"wp-block-contact-form-7-contact-form-selector\">\n<div class=\"wpcf7 no-js\" id=\"wpcf7-f8-o1\" lang=\"zh-CN\" dir=\"ltr\" data-wpcf7-id=\"8\">\n<div class=\"screen-reader-response\"><p role=\"status\" aria-live=\"polite\" aria-atomic=\"true\"><\/p> <ul><\/ul><\/div>\n<form action=\"\/fr\/wp-json\/wp\/v2\/posts\/4243#wpcf7-f8-o1\" method=\"post\" class=\"wpcf7-form init\" aria-label=\"Formulaire de message\" novalidate=\"novalidate\" data-status=\"init\" data-trp-original-action=\"\/fr\/wp-json\/wp\/v2\/posts\/4243#wpcf7-f8-o1\">\n<fieldset class=\"hidden-fields-container\"><input type=\"hidden\" name=\"_wpcf7\" value=\"8\" \/><input type=\"hidden\" name=\"_wpcf7_version\" value=\"6.1.3\" \/><input type=\"hidden\" name=\"_wpcf7_locale\" value=\"zh_CN\" \/><input type=\"hidden\" name=\"_wpcf7_unit_tag\" value=\"wpcf7-f8-o1\" \/><input type=\"hidden\" name=\"_wpcf7_container_post\" value=\"0\" 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div{margin-bottom:0px;}\n.keen-form div p{margin-bottom:0px !important;}\n.one-half,.one-third {\n position: relative;\n margin-right: 4%;\n float: left;\n z-index: 99;\n}\n.one-half { width: 48%; }\n.one-third { width: 30.66%; }\n.last {\n margin-right: 0 !important;\n clear: right;\n}\n.batton { margin-top:2%\n}\n@media only screen and (max-width: 767px) {\n .one-half, .one-third {\n width: 100%;\n margin-right: 0;\n }\n}\n<\/style><div class=\"wpcf7-response-output\" aria-hidden=\"true\"><\/div>\n<input type=\"hidden\" name=\"trp-form-language\" value=\"fr\"\/><\/form>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Les microsph\u00e8res d\u00e9signent des particules sph\u00e9riques dont la taille varie du micro au nano, et elles sont largement utilis\u00e9es comme mat\u00e9riaux composites. Elles ont suscit\u00e9 un int\u00e9r\u00eat consid\u00e9rable<\/p>","protected":false},"author":1,"featured_media":4244,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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