{"id":26370,"date":"2023-06-08T03:27:28","date_gmt":"2023-06-08T03:27:28","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=26370"},"modified":"2023-06-08T03:34:28","modified_gmt":"2023-06-08T03:34:28","slug":"dispersion-mechanism-of-dispersant-in-ceramic-slurry","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/dispersion-mechanism-of-dispersant-in-ceramic-slurry\/","title":{"rendered":"M\u00e9canisme de dispersion d'un agent dispersant dans une suspension c\u00e9ramique"},"content":{"rendered":"

Le dispersant est un tensioactif couramment utilis\u00e9, notamment dans la pr\u00e9paration de boues c\u00e9ramiques. Par exemple, pour la fabrication de boues destin\u00e9es \u00e0 filtre en mousse c\u00e9ramique<\/em><\/strong><\/a>s. L'ajout d'une quantit\u00e9 appropri\u00e9e de dispersant permet d'am\u00e9liorer efficacement les propri\u00e9t\u00e9s de surface de la poudre, de r\u00e9duire la viscosit\u00e9 de la suspension et d'obtenir une suspension pr\u00e9sentant de bonnes propri\u00e9t\u00e9s rh\u00e9ologiques, une dispersion homog\u00e8ne, une teneur \u00e9lev\u00e9e en solides et une bonne stabilit\u00e9.<\/p>\n

Il emp\u00eache l'agglom\u00e9ration mutuelle des particules c\u00e9ramiques en interagissant avec la surface de ces derni\u00e8res dans la suspension. Son m\u00e9canisme d'action peut \u00eatre globalement divis\u00e9 en trois types : la r\u00e9pulsion \u00e9lectrostatique, l'encombrement st\u00e9rique et la stabilisation \u00e9lectrostatique-st\u00e9rique.<\/p>\n

Le dispersant ionique est \u00e9lectrolys\u00e9 en ions charg\u00e9s ou en groupes hydrophiles et lipophiles dans le milieu de dispersion aqueux, puis adsorb\u00e9 \u00e0 la surface des particules solides pour former une couche protectrice charg\u00e9e, c'est-\u00e0-dire une double couche \u00e9lectrique diffuse. Lorsque les particules charg\u00e9es se rapprochent les unes des autres, la double couche \u00e9lectrique se superpose, le potentiel augmente, la r\u00e9pulsion \u00e9lectrostatique s\u2019intensifie et il devient difficile pour les particules de entrer en collision<\/em> et s'agglom\u00e8rent, jouant ainsi le r\u00f4le d'une dispersion \u00e9lectrostatiquement stable.<\/p>\n

La structure mol\u00e9culaire des polym\u00e8res non ioniques de haut poids mol\u00e9culaire comprend des groupes d'ancrage et des cha\u00eenes de solvatation. Le groupe d'ancrage est adsorb\u00e9 \u00e0 la surface des particules solides, et sa cha\u00eene de solvatation se d\u00e9ploie enti\u00e8rement dans le milieu pour former une couche d'encombrement st\u00e9rique destin\u00e9e \u00e0 emp\u00eacher la floculation et l'agglom\u00e9ration des particules solides, ce qui permet d'obtenir l'effet d'encombrement st\u00e9rique.<\/p>\n

Le poly\u00e9lectrolyte est adsorb\u00e9 par voie \u00e9lectrolytique \u00e0 la surface des particules dans le milieu de dispersion aqueux. La couche mol\u00e9culaire de polym\u00e8re charg\u00e9e peut non seulement repousser les ions environnants gr\u00e2ce \u00e0 la r\u00e9pulsion \u00e9lectrostatique de sa propre charge, mais aussi utiliser l'encombrement st\u00e9rique de la cha\u00eene de solvatation pour faire en sorte que les particules rebondissent les unes sur les autres. C'est ainsi qu'il exerce son effet stabilisateur par r\u00e9pulsion \u00e9lectrostatique et encombrement st\u00e9rique.<\/p>","protected":false},"excerpt":{"rendered":"

The dispersant is a widely used surfactant, which is widely used in the preparation of ceramic slurry. For example, making slurry for ceramic foam filters.…<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233,138],"tags":[13254],"class_list":["post-26370","post","type-post","status-publish","format-standard","hentry","category-blog","category-seo","tag-dispersant"],"yoast_head":"\nDispersion Mechanism of Dispersant in Ceramic Slurry<\/title>\n<meta name=\"description\" content=\"The dispersant is a widely used surfactant, which is widely used in the preparation of ceramic slurry, Adding an appropriate amount of...\" \/>\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.alalloycasting.com\/fr\/dispersion-mechanism-of-dispersant-in-ceramic-slurry\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" 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