{"id":14195,"date":"2024-02-15T14:02:08","date_gmt":"2024-02-15T13:02:08","guid":{"rendered":"https:\/\/www.toulouse-biotechnology-institute.fr\/?p=14195"},"modified":"2024-02-15T14:08:19","modified_gmt":"2024-02-15T13:08:19","slug":"les-performances-environnementales-et-acoustiques-de-la-tige-de-tournesol","status":"publish","type":"post","link":"https:\/\/www.toulouse-biotechnology-institute.fr\/en\/les-performances-environnementales-et-acoustiques-de-la-tige-de-tournesol\/","title":{"rendered":"Environmental and acoustic performance of sunflower stems"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"14195\" class=\"elementor elementor-14195\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ecfce24 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ecfce24\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-c2c1992\" data-id=\"c2c1992\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7b7883d elementor-widget elementor-widget-text-editor\" data-id=\"7b7883d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"Hero-intro\" data-ci-id=\"hero-intro\"><strong>To reduce the use of synthetic materials in the manufacture of acoustic panels, scientists from the agro-industrial chemistry laboratory (LCA - Toulouse INP\/INRAE) and the Toulouse biotechnology institute (INSA\/INRAE\/CNRS) of the INRAE Occitanie-Toulouse center, have turned their attention to the pith found inside sunflower stems. This material makes it possible to produce panels that are not only effective at absorbing noise, but also have a much lower environmental impact.<\/strong><\/p><p class=\"Hero-date\"><strong>Published February 15, 2024<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0b6499e elementor-widget elementor-widget-button\" data-id=\"0b6499e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/www.inrae.fr\/actualites\/performances-environnementales-acoustiques-tige-tournesol\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Read the full article on the INRAE website<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bbd4f4e elementor-widget elementor-widget-text-editor\" data-id=\"bbd4f4e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>To reduce noise reverberation in interior spaces, acoustic insulation panels are installed on ceilings and partitions. The LCA and TBI laboratories have developed panels from sunflower stem pith and analyzed their life cycle. The results are published in the journal <em>Journal of Cleaner Production<\/em>.<\/p><p>Les chercheurs et chercheuses ont constat\u00e9 que la moelle des tiges de tournesol avait des propri\u00e9t\u00e9s isolantes (thermiques et acoustiques) et qu&rsquo;elle pouvait donc jouer un r\u00f4le dans la transition vers une \u00e9conomie \u00e0 faible \u00e9mission de carbone fossile.<\/p><h2>Biobased materials and binders<\/h2><p>The scientists worked from the pith, found in the central part of the sunflower stem. They succeeded in shaping it into cohesive, machinable panels. Two formulations with natural binders were successfully tested: with starch or chitosan, a derivative of crustacean shells.<\/p><p>By measuring absorption coefficients, the properties of sunflower pith-based panels were compared with those of melamine foam and cork panels. They represent an interesting option, particularly the starch-based formulation. At low frequencies, these panels show absorption coefficients almost 10 times higher than existing industrial panels.<\/p><h2>Lower environmental impact<\/h2><p>Once the acoustic benefits had been validated, the teams analyzed the life cycle of sunflower pith-based panels, to study their environmental impact. In particular, there was the question of the depletion of the carbon stock with stems that were harvested instead of being reintegrated into the soil. Based on a 4-hectare plot in the Camargue, an analysis was carried out integrating soil carbon dynamics.<\/p><p>Compared with marketed alternatives, these panels show an environmental advantage in 6 of the 9 impact categories assessed. In particular, replacing melamine foam boards with the sunflower pith-based formulation reduces climate change impacts by 50-70%. However, panels using chitosan as a binder have a poorer environmental profile due to the use of chemicals to extract the molecules of interest. \"Pith-based panels using starch as a binder seem to be a good alternative both in terms of sound absorption performance and lower environmental impact\", appreciates Lorie Hamelin, researcher at TBI.<\/p><p>Une analyse plus pouss\u00e9e du processus de r\u00e9colte a montr\u00e9 que les \u00e9missions li\u00e9es \u00e0 la combustion du diesel par les machines agricoles \u00e9taient \u00e0 l&rsquo;origine des principaux impacts. L\u2019efficacit\u00e9 environnementale pourrait \u00eatre am\u00e9lior\u00e9e en augmentant la quantit\u00e9 de tiges r\u00e9colt\u00e9es par passage ou en adaptant des moissonneuses-batteuses qui r\u00e9colteraient, en un seul passage, tiges et graines. Ceci \u00e0 condition d\u2019\u00e9viter l\u2019appauvrissement du carbone organique dans les sols, par exemple gr\u00e2ce \u00e0 l\u2019implantation d\u2019un couvert v\u00e9g\u00e9tal qui serait broy\u00e9 et r\u00e9int\u00e9gr\u00e9 au sol.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-68c51d8 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"68c51d8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1922a3d elementor-position-inline-start elementor-view-default elementor-mobile-position-block-start elementor-widget elementor-widget-icon-box\" data-id=\"1922a3d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-box.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-box-wrapper\">\n\n\t\t\t\t\t\t<div class=\"elementor-icon-box-icon\">\n\t\t\t\t<a href=\"https:\/\/doi.org\/10.1016\/j.jclepro.2023.136620\" class=\"elementor-icon\" tabindex=\"-1\" aria-label=\"References\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-far-star\" viewbox=\"0 0 576 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M528.1 171.5L382 150.2 316.7 17.8c-11.7-23.6-45.6-23.9-57.4 0L194 150.2 47.9 171.5c-26.2 3.8-36.7 36.1-17.7 54.6l105.7 103-25 145.5c-4.5 26.3 23.2 46 46.4 33.7L288 439.6l130.7 68.7c23.2 12.2 50.9-7.4 46.4-33.7l-25-145.5 105.7-103c19-18.5 8.5-50.8-17.7-54.6zM388.6 312.3l23.7 138.4L288 385.4l-124.3 65.3 23.7-138.4-100.6-98 139-20.2 62.2-126 62.2 126 139 20.2-100.6 98z\"><\/path><\/svg>\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\n\t\t\t\t\t\t<div class=\"elementor-icon-box-content\">\n\n\t\t\t\t\t\t\t\t\t<h3 class=\"elementor-icon-box-title\">\n\t\t\t\t\t\t<a href=\"https:\/\/doi.org\/10.1016\/j.jclepro.2023.136620\" >\n\t\t\t\t\t\t\tReferences\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/h3>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<p class=\"elementor-icon-box-description\">\n\t\t\t\t\t\t Alejandra Gomez-Campos, Caroline Sablayrolles, Lorie Hamelin, Antoine Rouilly, Philippe Evon, Claire Vialle, Towards fossil-carbon free buildings: Production and environmental performance of innovative sound absorbing panels made from sunflower straw, Journal of Cleaner Production, Volume 400, 2023, 136620\nhttps:\/\/doi.org\/10.1016\/j.jclepro.2023.136620\t\t\t\t\t<\/p>\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-268a02f elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"268a02f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3e2296f elementor-position-inline-start elementor-view-default elementor-mobile-position-block-start elementor-widget elementor-widget-icon-box\" data-id=\"3e2296f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-box.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-box-wrapper\">\n\n\t\t\t\t\t\t<div class=\"elementor-icon-box-icon\">\n\t\t\t\t<span  class=\"elementor-icon\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-far-user-circle\" viewbox=\"0 0 496 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M248 104c-53 0-96 43-96 96s43 96 96 96 96-43 96-96-43-96-96-96zm0 144c-26.5 0-48-21.5-48-48s21.5-48 48-48 48 21.5 48 48-21.5 48-48 48zm0-240C111 8 0 119 0 256s111 248 248 248 248-111 248-248S385 8 248 8zm0 448c-49.7 0-95.1-18.3-130.1-48.4 14.9-23 40.4-38.6 69.6-39.5 20.8 6.4 40.6 9.6 60.5 9.6s39.7-3.1 60.5-9.6c29.2 1 54.7 16.5 69.6 39.5-35 30.1-80.4 48.4-130.1 48.4zm162.7-84.1c-24.4-31.4-62.1-51.9-105.1-51.9-10.2 0-26 9.6-57.6 9.6-31.5 0-47.4-9.6-57.6-9.6-42.9 0-80.6 20.5-105.1 51.9C61.9 339.2 48 299.2 48 256c0-110.3 89.7-200 200-200s200 89.7 200 200c0 43.2-13.9 83.2-37.3 115.9z\"><\/path><\/svg>\t\t\t\t<\/span>\n\t\t\t<\/div>\n\t\t\t\n\t\t\t\t\t\t<div class=\"elementor-icon-box-content\">\n\n\t\t\t\t\t\t\t\t\t<h3 class=\"elementor-icon-box-title\">\n\t\t\t\t\t\t<span  >\n\t\t\t\t\t\t\tContacts\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/h3>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<p class=\"elementor-icon-box-description\">\n\t\t\t\t\t\tLorie Hamelin <br>\nChercheure INRAE<br>\nlorie.hamelin@insa-toulouse.fr<br> <br>\nClaire Vialle<br>\nEnseignante-chercheuse LCA <br>claire.vialle@ipst-cnam.fr\n\t\t\t\t\t<\/p>\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Pour r\u00e9duire l\u2019utilisation de mat\u00e9riaux de synth\u00e8se dans la fabrication des panneaux acoustiques, des scientifiques des laboratoires de chimie agro-industrielle (LCA &#8211; Toulouse INP\/INRAE) et Toulouse biotechnology institute (INSA\/INRAE\/CNRS) du centre INRAE Occitanie-Toulouse, se sont int\u00e9ress\u00e9s \u00e0 la moelle pr\u00e9sente \u00e0 l\u2019int\u00e9rieur des tiges de tournesol. Cette mati\u00e8re permet de produire des panneaux, non seulement, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":14197,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[24],"class_list":["post-14195","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-resultat-scientifique","tag-equipe-sophye"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Les performances environnementales et acoustiques de la tige de tournesol | TBI, Toulouse Biotechnology Institute<\/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.toulouse-biotechnology-institute.fr\/en\/les-performances-environnementales-et-acoustiques-de-la-tige-de-tournesol\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Les performances environnementales et acoustiques de la tige de tournesol | TBI, Toulouse Biotechnology Institute\" \/>\n<meta property=\"og:description\" content=\"Pour r\u00e9duire l\u2019utilisation de mat\u00e9riaux de synth\u00e8se dans la fabrication des panneaux acoustiques, des scientifiques des laboratoires de chimie agro-industrielle (LCA &#8211; Toulouse INP\/INRAE) et Toulouse biotechnology institute (INSA\/INRAE\/CNRS) du centre INRAE Occitanie-Toulouse, se sont int\u00e9ress\u00e9s \u00e0 la moelle pr\u00e9sente \u00e0 l\u2019int\u00e9rieur des tiges de tournesol. Cette mati\u00e8re permet de produire des panneaux, non seulement, [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.toulouse-biotechnology-institute.fr\/en\/les-performances-environnementales-et-acoustiques-de-la-tige-de-tournesol\/\" \/>\n<meta property=\"og:site_name\" content=\"TBI, Toulouse Biotechnology Institute\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/TBI-Toulouse-Biotechnology-Institute-Bio-Chemical-Engineering-360428497952306\" \/>\n<meta property=\"article:published_time\" content=\"2024-02-15T13:02:08+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-02-15T13:08:19+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.toulouse-biotechnology-institute.fr\/wp-content\/uploads\/2024\/02\/LCA-TBI.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1100\" \/>\n\t<meta property=\"og:image:height\" content=\"400\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Christelle\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@TBI_Biotech\" \/>\n<meta name=\"twitter:site\" content=\"@TBI_Biotech\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Christelle\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" 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