{"id":3110,"date":"2025-04-21T15:50:33","date_gmt":"2025-04-21T07:50:33","guid":{"rendered":"https:\/\/calcium-carbonate.epic-powder.com\/?p=3110"},"modified":"2025-04-21T15:50:36","modified_gmt":"2025-04-21T07:50:36","slug":"what-are-vaterite-calcium-carbonate-microspheres-%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/calcium-carbonate.epic-powder.com\/fr\/what-are-vaterite-calcium-carbonate-microspheres-%ef%bc%9f\/","title":{"rendered":"Que sont les microsph\u00e8res de carbonate de calcium vat\u00e9rite ?"},"content":{"rendered":"<p><a href=\"https:\/\/calcium-carbonate.epic-powder.com\/fr\/machines\/\">Carbonate de calcium <\/a>Le carbonate de calcium est un mat\u00e9riau chimique important, riche en ressources. Sa production est simple et ses performances excellentes. Il est largement utilis\u00e9 dans le caoutchouc, l&#039;encre, la m\u00e9decine et l&#039;alimentation. Son utilisation est encore plus r\u00e9pandue dans le domaine m\u00e9dical. Le carbonate de calcium est un excellent additif et compl\u00e9ment calcique. Les compl\u00e9ments \u00e0 base de calcium offrent une teneur et une absorption \u00e9lev\u00e9es en calcium, ainsi qu&#039;une biodisponibilit\u00e9 \u00e9lev\u00e9e. Le carbonate de calcium de qualit\u00e9 pharmaceutique sert de charge et de base. Il est \u00e9galement utilis\u00e9 pour pr\u00e9parer des milieux de fermentation. Il apporte du calcium et stabilise le pH pendant la fermentation. Il agit ainsi comme un tampon essentiel dans les bioproc\u00e9d\u00e9s. Le carbonate de calcium est notamment aujourd&#039;hui utilis\u00e9 comme biomat\u00e9riau. Il permet de fabriquer des vecteurs intelligents pour l&#039;administration de g\u00e8nes, d&#039;enzymes et de m\u00e9dicaments. <a href=\"https:\/\/calcium-carbonate.epic-powder.com\/fr\/astra-portfolio\/grinding-and-classifying-system-for-the-production-of-calcium-carbonate\/\">carbonate de calcium vat\u00e9rite<\/a>, un polymorphe rare et m\u00e9tastable de CaCO\u2083, a suscit\u00e9 une attention croissante pour ses propri\u00e9t\u00e9s uniques.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"750\" height=\"731\" src=\"https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/04\/vaterite-calcium-carbonate.webp\" alt=\"carbonate de calcium vat\u00e9rite\" class=\"wp-image-3111\" srcset=\"https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/04\/vaterite-calcium-carbonate.webp 750w, https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/04\/vaterite-calcium-carbonate-300x292.webp 300w, https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/04\/vaterite-calcium-carbonate-12x12.webp 12w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Microsph\u00e8res de carbonate de calcium vat\u00e9rite<\/h2>\n\n\n\n<p>Le carbonate de calcium se pr\u00e9sente principalement sous trois formes cristallines\u00a0: la calcite, l\u2019aragonite et la vat\u00e9rite. La vat\u00e9rite est un cristal orthorhombique pr\u00e9sentant de l\u00e9g\u00e8res diff\u00e9rences structurelles avec la calcite. Sa maille \u00e9l\u00e9mentaire contient des ions carbonate et calcium dispos\u00e9s de mani\u00e8re sym\u00e9trique et ordonn\u00e9e. Cette structure conf\u00e8re \u00e0 la vat\u00e9rite sa forme sph\u00e9rique caract\u00e9ristique. Le carbonate de calcium vat\u00e9rite est rare dans la nature. Il se pr\u00e9sente g\u00e9n\u00e9ralement sous forme de sph\u00e8res polycristallines compos\u00e9es de microcristaux de taille nanom\u00e9trique. En revanche, la calcite et l\u2019aragonite sont g\u00e9n\u00e9ralement des monocristaux. La vat\u00e9rite se pr\u00e9sente \u00e9galement sous forme de disque, de paillettes, d\u2019hexagone et de lentille. La forme sph\u00e9rique de la vat\u00e9rite est consid\u00e9r\u00e9e comme la plus prometteuse pour les applications.<\/p>\n\n\n\n<p>Parmi les trois formes cristallines courantes du carbonate de calcium, la calcite est la plus stable thermodynamiquement. L&#039;aragonite est moyennement stable, tandis que la vat\u00e9rite est tr\u00e8s instable.<br>En solution aqueuse, la vat\u00e9rite se transforme facilement en calcite ou en aragonite.<br>Cependant, certains additifs peuvent stabiliser la vat\u00e9rite dans des conditions sp\u00e9cifiques. Ces substances ralentissent sa transformation en formes cristallines plus stables.<br>Des \u00e9tudes montrent que les conditions de synth\u00e8se influencent la forme cristalline du carbonate de calcium. Les additifs et les m\u00e9thodes de post-traitement influencent \u00e9galement sa structure. Ainsi, les microsph\u00e8res de carbonate de calcium peuvent obtenir des formes cristallines contr\u00f4lables.<br>En ajustant la temp\u00e9rature, le pH et le temps, la synth\u00e8se s\u00e9lective devient possible. L&#039;analyse de la formation de la vat\u00e9rite et de la structure cellulaire unitaire permet de contr\u00f4ler ses propri\u00e9t\u00e9s. Cela permet une r\u00e9gulation pr\u00e9cise de la morphologie, de la taille et des caract\u00e9ristiques physiques.<\/p>\n\n\n\n<p>Compar\u00e9e \u00e0 d&#039;autres formes, la vat\u00e9rite pr\u00e9sente \u00e9galement des propri\u00e9t\u00e9s fondamentales telles qu&#039;une faible densit\u00e9 et une stabilit\u00e9 chimique. Elle est blanche, inodore, d\u00e9composable en milieu acide et chimiquement stable. De plus, la vat\u00e9rite pr\u00e9sente une structure interne creuse ou poreuse. Elle conserve une granulom\u00e9trie uniforme et des dimensions \u00e0 l&#039;\u00e9chelle micro-nano. De plus, elle pr\u00e9sente une forte hydrophilie et une grande surface sp\u00e9cifique.<br>Sa dissolution et sa dispersion sont \u00e9galement sup\u00e9rieures \u00e0 celles des autres formes. De plus, elle offre une excellente biocompatibilit\u00e9 et une excellente s\u00e9curit\u00e9. Sa bonne d\u00e9gradabilit\u00e9 et sa forte capacit\u00e9 de changement de phase sont remarquables. La vat\u00e9rite pr\u00e9sente notamment une distribution particulaire sph\u00e9rique. Elle est donc tr\u00e8s prometteuse comme vecteur de m\u00e9dicaments inorganiques.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">M\u00e9thode de synth\u00e8se de microsph\u00e8res poreuses de carbonate de calcium vat\u00e9rite<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"700\" height=\"525\" src=\"https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/03\/ball-milling-classifier-product-line.webp\" alt=\"gamme de produits de classificateurs de broyeurs \u00e0 boulets\" class=\"wp-image-3018\" srcset=\"https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/03\/ball-milling-classifier-product-line.webp 700w, https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/03\/ball-milling-classifier-product-line-300x225.webp 300w, https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/03\/ball-milling-classifier-product-line-16x12.webp 16w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">copr\u00e9cipitation<\/h3>\n\n\n\n<p>La copr\u00e9cipitation est une m\u00e9thode courante et \u00e9conomique de synth\u00e8se du carbonate de calcium. L&#039;ajout d&#039;une source de carbonate, comme le bicarbonate de sodium, \u00e0 une solution de chlorure de calcium ou d&#039;hydroxyde de calcium permet la pr\u00e9cipitation. Cette m\u00e9thode est simple d&#039;utilisation et peu co\u00fbteuse. Elle convient donc \u00e0 la production de carbonate de calcium \u00e0 grande \u00e9chelle.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Synth\u00e8se hydrothermale<\/h3>\n\n\n\n<p>La m\u00e9thode hydrothermale repose sur des solutions \u00e0 haute temp\u00e9rature et haute pression. Dans ces conditions, la solution pr\u00e9sente une solubilit\u00e9, une diffusivit\u00e9 et une activit\u00e9 ionique \u00e9lev\u00e9es. Cette m\u00e9thode est pratique et efficace pour la synth\u00e8se du carbonate de calcium. En ajustant les conditions et la dur\u00e9e de la r\u00e9action, elle permet de contr\u00f4ler la forme, la taille et la morphologie des cristaux. Elle offre une excellente capacit\u00e9 de contr\u00f4le cristallin. Ainsi, elle produit du carbonate de calcium bien cristallis\u00e9 aux formes sp\u00e9cifiques.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">M\u00e9thode de micro\u00e9mulsion<\/h3>\n\n\n\n<p>La micro\u00e9mulsion, \u00e9galement appel\u00e9e nano\u00e9mulsion, est principalement utilis\u00e9e pour synth\u00e9tiser des nanoparticules. La copr\u00e9cipitation en solution consiste \u00e0 m\u00e9langer deux ou plusieurs pr\u00e9curseurs en phase huileuse. Ces pr\u00e9curseurs r\u00e9agissent simultan\u00e9ment pour pr\u00e9cipiter et former du carbonate de calcium. Cette m\u00e9thode favorise efficacement la synth\u00e8se contr\u00f4l\u00e9e de nanoparticules.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Biomin\u00e9ralisation<\/h3>\n\n\n\n<p>La biomin\u00e9ralisation fait r\u00e9f\u00e9rence \u00e0 la formation de min\u00e9raux inorganiques par des processus biologiques.<br><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u00c9tude sur les microsph\u00e8res poreuses de carbonate de calcium vat\u00e9rite comme vecteurs de m\u00e9dicaments<\/h2>\n\n\n\n<p>Les micro\/nanoparticules de CaCO3 peuvent \u00eatre utilis\u00e9es pour la lib\u00e9ration contr\u00f4l\u00e9e de m\u00e9dicaments hydrophiles ou hydrophobes. Gr\u00e2ce \u00e0 sa d\u00e9gradation lente dans l&#039;organisme, le CaCO3 constitue un syst\u00e8me d&#039;administration m\u00e9dicamenteuse \u00e0 action prolong\u00e9e. Les particules collo\u00efdales PEI-CO2@CaCO3, sensibles au pH, permettent aux groupes r\u00e9actionnels des nanoparticules de carbonate de calcium vat\u00e9rite de se lier aux mol\u00e9cules cibl\u00e9es dans les cellules tumorales. Cela facilite le transport du m\u00e9dicament et contribue \u00e0 inhiber la croissance tumorale.<\/p>\n\n\n\n<p>La morphologie poreuse et la structure interne d\u00e9velopp\u00e9e de la vat\u00e9rite lui permettent d&#039;accueillir divers types de mol\u00e9cules. Ces particules capturent efficacement les substances bioactives, notamment les petites mol\u00e9cules et les macromol\u00e9cules. Lors de la formation des particules, ces substances p\u00e9n\u00e8trent dans les pores par adsorption physique (diffusion) ou copr\u00e9cipitation (co-synth\u00e8se). Les microsph\u00e8res de carbonate de calcium de vat\u00e9rite, dont la granulom\u00e9trie et la sensibilit\u00e9 au pH sont ajustables, sont id\u00e9ales pour l&#039;administration de m\u00e9dicaments et de g\u00e8nes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\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=\"Syst\u00e8me de broyeur \u00e0 boulets et de classificateur pour carbonate de calcium\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/RNRMeS2Y9yA?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<p>Actuellement, le carbonate de calcium est principalement utilis\u00e9 comme vecteur de m\u00e9dicaments pour les m\u00e9dicaments oraux, les traitements contre le cancer, les m\u00e9dicaments topiques, les mat\u00e9riaux de r\u00e9paration osseuse et le transfert de g\u00e8nes. Bien que le carbonate de calcium vat\u00e9rite soit une forme cristalline thermodynamique m\u00e9tastable et inexistante dans la nature, il offre des avantages uniques. Gr\u00e2ce \u00e0 sa morphologie poreuse, sa grande surface sp\u00e9cifique, sa bonne perm\u00e9abilit\u00e9 et sa biocompatibilit\u00e9, la vat\u00e9rite est biod\u00e9gradable et non toxique pour les cellules normales. De ce fait, son potentiel est \u00e9norme dans les domaines biom\u00e9dicaux, tels que les vecteurs \u00e0 lib\u00e9ration contr\u00f4l\u00e9e de m\u00e9dicaments et les vecteurs de th\u00e9rapie g\u00e9nique. Cela a suscit\u00e9 une attention et des recherches croissantes dans ces domaines.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Poudre \u00e9pique <\/h2>\n\n\n\n<p><a href=\"https:\/\/calcium-carbonate.epic-powder.com\/fr\/contact\/\">Poudre \u00e9pique<\/a>Plus de 20 ans d&#039;exp\u00e9rience dans l&#039;industrie des poudres ultrafines. Nous promouvons activement le d\u00e9veloppement futur des poudres ultrafines, en nous concentrant sur les proc\u00e9d\u00e9s de concassage, de broyage, de classification et de modification. Contactez-nous pour une consultation gratuite et des solutions personnalis\u00e9es\u00a0! Notre \u00e9quipe d&#039;experts s&#039;engage \u00e0 fournir des produits et services de haute qualit\u00e9 pour optimiser la valeur de vos proc\u00e9d\u00e9s de traitement des poudres. Epic Powder\u00a0: votre expert de confiance en traitement des poudres\u00a0!<\/p>\n\n\n\n<div class=\"wp-block-contact-form-7-contact-form-selector\">\n<div class=\"wpcf7 no-js\" id=\"wpcf7-f16-o1\" lang=\"zh-CN\" dir=\"ltr\" data-wpcf7-id=\"16\">\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\/3110#wpcf7-f16-o1\" method=\"post\" class=\"wpcf7-form init\" aria-label=\"\u7559\u8a00\u8868\u5355\" novalidate=\"novalidate\" data-status=\"init\" data-trp-original-action=\"\/fr\/wp-json\/wp\/v2\/posts\/3110#wpcf7-f16-o1\">\n<fieldset class=\"hidden-fields-container\"><input type=\"hidden\" name=\"_wpcf7\" value=\"16\" \/><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-f16-o1\" \/><input type=\"hidden\" name=\"_wpcf7_container_post\" value=\"0\" \/><input type=\"hidden\" name=\"_wpcf7_posted_data_hash\" value=\"\" \/>\n<\/fieldset>\n<div class=\"keen-form\">\n\t<div class=\"one-half\">\n\t\t<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-name\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text wpcf7-validates-as-required\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Votre nom*\" value=\"\" type=\"text\" name=\"your-name\" \/><\/span>\n\t\t<\/p>\n\t<\/div>\n\t<div class=\"one-half last\">\n\t\t<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-email\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-email wpcf7-validates-as-required wpcf7-text wpcf7-validates-as-email\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Votre email*\" value=\"\" type=\"email\" name=\"your-email\" \/><\/span>\n\t\t<\/p>\n\t<\/div>\n\t<div class=\"one-half\">\n\t\t<p><span class=\"wpcf7-form-control-wrap\" data-name=\"pnone\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-tel wpcf7-validates-as-required wpcf7-text wpcf7-validates-as-tel\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Votre Pnone ou Whatsapp*\" value=\"\" type=\"tel\" name=\"pnone\" \/><\/span>\n\t\t<\/p>\n\t<\/div>\n\t<div class=\"one-half last\">\n\t\t<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-subject\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" placeholder=\"Votre entreprise\" value=\"\" type=\"text\" name=\"your-subject\" \/><\/span>\n\t\t<\/p>\n\t<\/div>\n\t<div>\n\t\t<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-message\"><textarea cols=\"40\" rows=\"3\" maxlength=\"2000\" class=\"wpcf7-form-control wpcf7-textarea\" aria-invalid=\"false\" placeholder=\"Votre message\" name=\"your-message\"><\/textarea><\/span>\n\t\t<\/p>\n\t<\/div>\n\t<div>\n\t\t<p><input class=\"wpcf7-form-control wpcf7-submit has-spinner\" type=\"submit\" value=\"Soumettre\" \/>\n\t\t<\/p>\n\t<\/div>\n<\/div>\n<style>\n.keen-form div{margin-bottom:5px;}\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: 40%; }\n.one-third { width: 30.66%; }\n.last {\n margin-right: 0 !important;\n clear: right;\nwidth: 40%;\n}\n@media only screen and (max-width: 767px) {\n .one-half, .one-third {\n width: 90%;\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>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Le carbonate de calcium est une substance chimique importante, riche en ressources. Sa production est simple et ses performances excellentes. Il est largement utilis\u00e9 dans le caoutchouc, l&#039;encre, la m\u00e9decine et l&#039;alimentation. Son utilisation est encore plus r\u00e9pandue dans le domaine m\u00e9dical. Le carbonate de calcium est un excellent additif et compl\u00e9ment calcique. Les compl\u00e9ments \u00e0 base de calcium offrent une teneur et une absorption \u00e9lev\u00e9es en calcium. Ils [\u2026]<\/p>","protected":false},"author":1,"featured_media":3111,"comment_status":"closed","ping_status":"closed","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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