{"id":2474,"date":"2025-10-28T15:55:08","date_gmt":"2025-10-28T07:55:08","guid":{"rendered":"https:\/\/protein-dry-fractionation.epic-powder.com\/?p=2474"},"modified":"2025-10-28T15:55:15","modified_gmt":"2025-10-28T07:55:15","slug":"rice-starch-particle-structure-and-gelatinization-properties","status":"publish","type":"post","link":"https:\/\/protein-dry-fractionation.epic-powder.com\/fr\/rice-starch-particle-structure-and-gelatinization-properties\/","title":{"rendered":"Structure des particules d&#039;amidon de riz et propri\u00e9t\u00e9s de g\u00e9latinisation"},"content":{"rendered":"<p>Parmi toutes les c\u00e9r\u00e9ales connues, <a href=\"https:\/\/protein-dry-fractionation.epic-powder.com\/fr\/\" target=\"_blank\">particules d&#039;amidon de riz<\/a> ont la plus petite taille, avec un diam\u00e8tre moyen de seulement<a href=\"https:\/\/protein-dry-fractionation.epic-powder.com\/fr\/air-classifier-mill\/\" target=\"_blank\"> 2\u20138 \u03bcm<\/a>. En comparaison, <a href=\"https:\/\/protein-dry-fractionation.epic-powder.com\/fr\/air-classifier-mill\/\" target=\"_blank\">amidon de ma\u00efs<\/a> mesure 5\u201325 \u03bcm, l\u2019amidon de bl\u00e9 2\u201345 \u03bcm, l\u2019amidon de sorgho 5\u201325 \u03bcm et l\u2019amidon de pomme de terre 15\u2013100 \u03bcm.<\/p>\n\n\n\n<p>La petite taille des particules et la grande surface sp\u00e9cifique de l&#039;amidon de riz lui conf\u00e8rent de nombreuses propri\u00e9t\u00e9s physicochimiques sup\u00e9rieures \u00e0 celles des autres amidons. Il peut servir de substitut aux mati\u00e8res grasses, est facilement digestible, pr\u00e9sente une faible teneur en lipides et min\u00e9raux et poss\u00e8de une tr\u00e8s faible liaison aux prot\u00e9ines allerg\u00e8nes.<\/p>\n\n\n\n<p>De plus, l&#039;amidon de riz est le plus blanc de tous les amidons, ce qui le rend id\u00e9al pour l&#039;enrobage brillant des bonbons ou des comprim\u00e9s. Des chercheurs du Southern Institute of Louisiana, aux \u00c9tats-Unis, ont d\u00e9velopp\u00e9 un produit \u00e0 base d&#039;amidon r\u00e9sistant \u00e0 base de riz destin\u00e9 aux patients ob\u00e8ses et diab\u00e9tiques. Une fois introduit dans le c\u00f4lon, il favorise la croissance de bact\u00e9ries b\u00e9n\u00e9fiques, am\u00e9liore la flore intestinale et pr\u00e9sente des bienfaits particuliers pour la sant\u00e9 intestinale.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"533\" src=\"https:\/\/protein-dry-fractionation.epic-powder.com\/wp-content\/uploads\/2025\/10\/rice-starch.webp\" alt=\"amidon de riz\" class=\"wp-image-2475\" srcset=\"https:\/\/protein-dry-fractionation.epic-powder.com\/wp-content\/uploads\/2025\/10\/rice-starch.webp 800w, https:\/\/protein-dry-fractionation.epic-powder.com\/wp-content\/uploads\/2025\/10\/rice-starch-300x200.webp 300w, https:\/\/protein-dry-fractionation.epic-powder.com\/wp-content\/uploads\/2025\/10\/rice-starch-768x512.webp 768w, https:\/\/protein-dry-fractionation.epic-powder.com\/wp-content\/uploads\/2025\/10\/rice-starch-18x12.webp 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-separation-of-rice-starch\">S\u00e9paration de l&#039;amidon de riz<\/h2>\n\n\n\n<p>L&#039;amidon de riz se trouve dans l&#039;endosperme des grains de riz m\u00fbrs. Le riz est compos\u00e9 de balle 20% et de riz brun 80%. Le riz blanc consomm\u00e9 quotidiennement est obtenu par mouture du son et du germe du riz brun pour obtenir l&#039;endosperme.<\/p>\n\n\n\n<p>Selon la morphologie des particules et la teneur en amylose, le riz peut \u00eatre class\u00e9 en riz gluant (0,8\u20132% d&#039;amylose), riz \u00e0 grains courts (7\u201320%), riz \u00e0 grains moyens (20\u201325%) et riz \u00e0 grains longs (plus de 25%).<\/p>\n\n\n\n<p>Actuellement, les m\u00e9thodes de s\u00e9paration de l\u2019amidon de riz comprennent principalement le trempage alcalin, les tensioactifs, les ultrasons et les processus enzymatiques.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-structure-and-composition-of-rice-starch-particles\">Structure et composition des particules d&#039;amidon de riz<\/h2>\n\n\n\n<p>En g\u00e9n\u00e9ral, la granulom\u00e9trie de l&#039;amidon de riz varie consid\u00e9rablement selon les vari\u00e9t\u00e9s de riz. L&#039;amidon de riz gluant pr\u00e9sente des granules plus gros que celui du riz indica, tandis que celui du riz japonica pr\u00e9sente les granules les plus petits.<\/p>\n\n\n\n<p>L&#039;amidon de riz se pr\u00e9sente souvent sous forme de granules d&#039;amidon compos\u00e9s, ovales ou sph\u00e9riques, dont le diam\u00e8tre varie de 7 \u00e0 39 \u03bcm. Chaque granule contient 20 \u00e0 60 petits granules d&#039;amidon. Au microscope \u00e9lectronique, la surface des granules compos\u00e9s appara\u00eet poreuse. Ces pores se forment lors de la s\u00e9paration des complexes amidon-prot\u00e9ine de l&#039;endosperme lors de l&#039;isolement.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-gelatinization-characteristics-of-rice-starch\">Caract\u00e9ristiques de g\u00e9latinisation de l&#039;amidon de riz<\/h2>\n\n\n\n<p>Dans les applications alimentaires et industrielles, l&#039;amidon de riz doit \u00eatre chauff\u00e9 et g\u00e9latinis\u00e9. Son comportement \u00e0 la g\u00e9latinisation est \u00e9troitement li\u00e9 \u00e0 sa structure mol\u00e9culaire et physico-chimique.<\/p>\n\n\n\n<p>Lorsque la suspension d&#039;amidon est chauff\u00e9e \u00e0 une certaine temp\u00e9rature, les granules gonflent soudainement, la structure cristalline dispara\u00eet et l&#039;amylose commence \u00e0 se lixivier. La bir\u00e9fringence (croix de Malte) dispara\u00eet et la suspension se transforme en une p\u00e2te visqueuse qui ne se d\u00e9pose pas rapidement, m\u00eame sans agitation. Cette transformation est appel\u00e9e g\u00e9latinisation de l&#039;amidon, au cours de laquelle la chaleur et l&#039;\u00e9nergie hydrique transforment la structure ordonn\u00e9e en une structure d\u00e9sordonn\u00e9e.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-the-process-can-be-divided-into-three-stages\">Le processus peut \u00eatre divis\u00e9 en trois \u00e9tapes<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/protein-dry-fractionation.epic-powder.com\/wp-content\/uploads\/2025\/10\/Rice-starch-grinding-machine.webp\" alt=\"Machine de broyage d&#039;amidon de riz\" class=\"wp-image-2477\" srcset=\"https:\/\/protein-dry-fractionation.epic-powder.com\/wp-content\/uploads\/2025\/10\/Rice-starch-grinding-machine.webp 800w, https:\/\/protein-dry-fractionation.epic-powder.com\/wp-content\/uploads\/2025\/10\/Rice-starch-grinding-machine-300x300.webp 300w, https:\/\/protein-dry-fractionation.epic-powder.com\/wp-content\/uploads\/2025\/10\/Rice-starch-grinding-machine-150x150.webp 150w, https:\/\/protein-dry-fractionation.epic-powder.com\/wp-content\/uploads\/2025\/10\/Rice-starch-grinding-machine-768x768.webp 768w, https:\/\/protein-dry-fractionation.epic-powder.com\/wp-content\/uploads\/2025\/10\/Rice-starch-grinding-machine-12x12.webp 12w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Premi\u00e8re \u00e9tape :<\/strong><br>Avant d&#039;atteindre la temp\u00e9rature de g\u00e9latinisation, l&#039;eau p\u00e9n\u00e8tre dans les granules d&#039;amidon par les interstices et se lie aux groupes polaires. Les granules conservent leur forme et leur bir\u00e9fringence.<\/li>\n\n\n\n<li><strong>Deuxi\u00e8me \u00e9tape :<\/strong><br>Une fois la temp\u00e9rature de g\u00e9latinisation atteinte, les granules d&#039;amidon absorbent rapidement l&#039;eau et gonflent fortement. La bir\u00e9fringence dispara\u00eet \u00e0 mesure que les r\u00e9gions cristallines se d\u00e9sint\u00e8grent. Une fois ce ph\u00e9nom\u00e8ne atteint, le refroidissement ne permet plus de restaurer la structure initiale des granules.<\/li>\n\n\n\n<li><strong>Troisi\u00e8me \u00e9tape :<\/strong><br>Avec un chauffage continu, les granules d&#039;amidon gonfl\u00e9s se d\u00e9sint\u00e8grent et se dissolvent davantage.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-characteristics-and-applications-of-rice-starch\">Caract\u00e9ristiques et applications de l&#039;amidon de riz<\/h2>\n\n\n\n<p>Les granules d&#039;amidon de riz sont fins, dot\u00e9s d&#039;une grande surface sp\u00e9cifique et d&#039;une forte capacit\u00e9 d&#039;adsorption. Inodores, ils n&#039;alt\u00e8rent pas la saveur des aliments. Avec une texture onctueuse et cr\u00e9meuse en bouche, l&#039;amidon de riz est un excellent substitut aux mati\u00e8res grasses. Sa couleur blanche \u00e9clatante le rend id\u00e9al pour l&#039;enrobage des comprim\u00e9s et des bonbons.<\/p>\n\n\n\n<p>Les vari\u00e9t\u00e9s cireuses pr\u00e9sentent une bonne stabilit\u00e9 \u00e0 la cong\u00e9lation-d\u00e9cong\u00e9lation, emp\u00eachant la syn\u00e9r\u00e8se et le r\u00e9tr\u00e9cissement pendant la cong\u00e9lation. De plus, l&#039;amidon de riz est hypoallerg\u00e9nique, ce qui le rend adapt\u00e9 \u00e0 un large \u00e9ventail d&#039;applications\u00a0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Produits de beaut\u00e9:<\/strong> Utilis\u00e9 dans les poudres pour le visage pour une bonne adh\u00e9rence et un fini naturel.<\/li>\n\n\n\n<li><strong>Papier et photographie :<\/strong> Utilis\u00e9 comme agent de collage pour une impression claire et durable.<\/li>\n\n\n\n<li><strong>Industriel:<\/strong> Fonctionne comme lubrifiant alimentaire et pour caoutchouc.<\/li>\n\n\n\n<li><strong>Nourriture:<\/strong> Agit comme liant et \u00e9paississant dans les bonbons, les sauces, les soupes et le riz instantan\u00e9 pour une texture lisse.<\/li>\n\n\n\n<li><strong>Amidon fonctionnel :<\/strong> L&#039;amidon poreux offre une forte adsorption, adapt\u00e9 aux aliments fonctionnels pour nourrissons et personnes \u00e2g\u00e9es. L&#039;amidon \u00e0 digestion lente contribue \u00e0 r\u00e9duire la charge glyc\u00e9mique, ce qui convient aux diab\u00e9tiques et aux sportifs.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-conclusion\">Conclusion<\/h2>\n\n\n\n<p>Pour garantir un amidon de riz de haute qualit\u00e9 pour les applications alimentaires, pharmaceutiques et fonctionnelles, un contr\u00f4le pr\u00e9cis de la taille des particules est essentiel. <a href=\"https:\/\/protein-dry-fractionation.epic-powder.com\/fr\/contact\/\" target=\"_blank\">Poudre EPIC<\/a> Fort de plus de 20 ans d&#039;exp\u00e9rience dans le broyage et la classification ultrafins, l&#039;entreprise propose des syst\u00e8mes de broyeurs classificateurs \u00e0 air de pointe pour un traitement efficace et \u00e0 basse temp\u00e9rature de l&#039;amidon de riz.<br>Ces syst\u00e8mes garantissent \u00e9galement un fonctionnement sans contamination. En combinant broyage et classification en une seule \u00e9tape, la technologie EPIC Powder assure une distribution granulom\u00e9trique stable et une excellente blancheur. Elle am\u00e9liore \u00e9galement la fonctionnalit\u00e9 du produit et \u00e9tablit une nouvelle r\u00e9f\u00e9rence pour la production d&#039;amidon de riz \u00e0 haute valeur ajout\u00e9e.<\/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=\"Moulin \u00e0 jet EPIC - Exp\u00e9rience de broyage d&#039;amidon de ma\u00efs pr\u00e9g\u00e9latinis\u00e9 et d&#039;amidon de ma\u00efs\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/Lmw4hiy1gnQ?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<div class=\"wp-block-contact-form-7-contact-form-selector\">\n<div class=\"wpcf7 no-js\" id=\"wpcf7-f2347-o1\" lang=\"en-US\" dir=\"ltr\" 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c\u0153ur<\/span>.<\/span><label><input aria-label=\"1\" type=\"radio\" name=\"kc_captcha\" value=\"kc_human\" \/><svg aria-hidden=\"true\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 576 512\"><path fill=\"currentColor\" d=\"M415 24c-53 0-103 42-127 65-24-23-74-65-127-65C70 24 16 77 16 166c0 72 67 133 69 135l187 181c9 8 23 8 32 0l187-180c2-3 69-64 69-136 0-89-54-142-145-142z\"\/><\/svg><\/label><label><input aria-label=\"2\" type=\"radio\" name=\"kc_captcha\" value=\"bot\" \/><svg aria-hidden=\"true\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 576 512\"><path fill=\"currentColor\" d=\"M259 18l-65 132-146 22c-26 3-37 36-18 54l106 103-25 146c-5 26 23 46 46 33l131-68 131 68c23 13 51-7 46-33l-25-146 106-103c19-18 8-51-18-54l-146-22-65-132a32 32 0 00-58 0z\"\/><\/svg><\/label><label><input aria-label=\"3\" type=\"radio\" name=\"kc_captcha\" value=\"bot\" \/><svg aria-hidden=\"true\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" 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}\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>Parmi toutes les c\u00e9r\u00e9ales connues, les particules d&#039;amidon de riz sont les plus petites, avec un diam\u00e8tre moyen de seulement 2 \u00e0 8 \u03bcm. En comparaison, l&#039;amidon de ma\u00efs mesure 5 \u00e0 25 \u03bcm, l&#039;amidon de bl\u00e9 2 \u00e0 45 \u03bcm, l&#039;amidon de sorgho 5 \u00e0 25 \u03bcm et l&#039;amidon de pomme de terre 15 \u00e0 100 \u03bcm. La petite taille des particules et la grande surface sp\u00e9cifique de l&#039;amidon de riz lui conf\u00e8rent de nombreuses propri\u00e9t\u00e9s sup\u00e9rieures [\u2026]<\/p>","protected":false},"author":1,"featured_media":2477,"comment_status":"open","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":"","ast-disable-related-posts":"","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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2474","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-protein-dry-fractionation"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v26.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Rice Starch Particle Structure and Gelatinization Properties - Protein Fractionation &amp; 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