{"id":12461,"date":"2026-04-08T12:47:02","date_gmt":"2026-04-08T10:47:02","guid":{"rendered":"https:\/\/ikv-aachen.de\/rp\/straincoat\/"},"modified":"2026-05-20T10:57:22","modified_gmt":"2026-05-20T08:57:22","slug":"straincoat","status":"publish","type":"cpt_ikv_rp","link":"https:\/\/ikv-aachen.de\/en\/rp\/straincoat\/","title":{"rendered":"StrainCoat"},"content":{"rendered":"<style type=\"text\/css\">\n    #single-header-block_1c37960678c23d5d2c7fde05e4b8dbb7 .swiperThumbsNavi .swiper-slide {\n        opacity: 0.4;\n    }\n\n    #single-header-block_1c37960678c23d5d2c7fde05e4b8dbb7 .swiperThumbsNavi .swiper-slide-thumb-active {\n        opacity: 1;\n    }\n<\/style>\n    <section id=\"single-header-block_1c37960678c23d5d2c7fde05e4b8dbb7\" class=\"block-single-header theGridWrapper \">\n        <div class=\"theGrid12\">\n            <div class=\" col-start-2 col-span-10 md:col-start-3  md:col-span-8\">\n                <h2 class=\"font-serif font-semibold text-blue text-sm w-4\/5\">\n                    Dehnungstolerante PECVD-Barrierebeschichtungen f\u00fcr flexible Verpackungsanwendungen                 <\/h2>\n                                    <div class=\"mt-base text-blue text-sm font border-l-8  border-blue pl-base my-12 leading-normal \">\n                        Bei der Entwicklung nachhaltiger Kunststoffverpackungen sind Plasmabeschichtungen f\u00fcr den Einsatz als Gas- und Wasserdampfbarriere ideal geeignet. Dem gegen\u00fcber steht ihre geringe Dehnungstoleranz, durch die sie f\u00fcr Anwendungen mit erh\u00f6hter mechanischer Belastung nur begrenzt geeignet sind. Hier setzte das DFG-Projekt StrainCoat an, bei dem Sch\u00e4digungsmechanismen sowie m\u00f6gliche Gegenma\u00dfnahmen erforscht wurden.                    <\/div>\n                                            <\/div>\n        <\/div>\n    <\/section>\n\n<p class=\"wp-block-paragraph\">By specifically adjusting the process parameters, PECVD (Plasma Enhanced Chemical Vapor Deposition) allows both silicon oxide (SiOx) and silicon organic (SiOCH) coatings to be deposited one after the other. SiOx coatings have a glass-like structure with excellent barrier properties, but tend to crack early. SiOCH layers with a higher organic content enable more flexible network structures, but at the expense of the barrier effect.<\/p>\n\n<p class=\"wp-block-paragraph\">Based on this, multilayer systems were developed that combine hard SiOx barrier layers with softer SiOCH intermediate layers (Fig. 1). This structure is intended to extend the diffusion path by decoupling the formation of cracks in individual layers. Simulations showed that this effect can reduce permeation by up to 81% with two barrier layers compared to a single layer of the same overall thickness.<\/p>\n\n<p class=\"wp-block-paragraph\">The tests achieved an improvement in elongation tolerance compared to single layers. Nevertheless, the system remains vulnerable: microscopic images showed that just 1.4 % of the open area leads to complete barrier loss due to cracking. The discrepancy between minor visible damage and drastic loss of function points to additional, previously unidentified failure mechanisms in the nanometer range.<\/p>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<figure class=\" relative flex flex-col gap-2xs mb-xs md:mb-l xl:mb-xl\"><img decoding=\"async\"  class=\" w-full  \"  src=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2026\/04\/DFG-DA-488\uf0223-1-scaled.jpg\" srcset=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2026\/04\/DFG-DA-488\uf0223-1-748x266.jpg 748w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2026\/04\/DFG-DA-488\uf0223-1-1536x546.jpg 1536w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2026\/04\/DFG-DA-488\uf0223-1-768x273.jpg 768w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" width=\"1536\" height=\"546\" alt=\"DFG DA 488\uf0223-1\" loading=\"lazy\" \/><span class=\" text-copyright order-3 justify-end text-right w-full  w-full \">&copy; IKV<\/span><figcaption class=\" w-full  text-figcaption justify-end text-right \">Fig. 1: The multilayer systems developed at IKV combine hard SiOx barrier layers with softer SiOCH intermediate layers.<\/figcaption><\/figure>\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Project data and funding<\/summary>\n<p class=\"wp-block-paragraph\">We would like to thank the DFG for funding the project (funding reference DA 488\/3-1) and the project partners for their cooperation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Project duration: 01.10.2022 &#8211; 30.09.2025<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Promotion:<\/p>\n\n\n<section id=\"logo-bar-block_42556fc12ed3e09ebb2abb635592d432\" class=\"block-logo-bar py-2xl  clear-both\">\n    <div class=\"theGridWrapper overflow-hidden  \">\n        <div class=\"grid grid-cols-[repeat(auto-fill,minmax(140px,1fr))] gap-base\">\n                            <figure class=\" relative h-full  \"><img decoding=\"async\" fetchpriority=\"low\"  class=\" object-contain w-full h-full mb-base  \"  src=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/12\/Logo-DFG.png\" srcset=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/12\/Logo-DFG-748x591.png 748w\" sizes=\"auto, (max-width: 748px) 100vw, 748px\" width=\"748\" height=\"591\" alt=\"Logo-DFG\" loading=\"lazy\" \/><\/figure>                                <\/div>\n    <\/div>\n<\/section>\n<\/details>\n","protected":false},"excerpt":{"rendered":"<p>In the development of sustainable plastic packaging, plasma coatings are ideally suited for use as a gas and water vapor barrier. On the other hand, their low elongation tolerance means that they are only suitable to a limited extent for applications with increased mechanical loads. This was the starting point for the DFG project StrainCoat, in which damage mechanisms and possible countermeasures were researched.<\/p>\n","protected":false},"featured_media":12107,"parent":0,"template":"","tags":[865,1551,896,1550],"research_fields":[842],"class_list":["post-12461","cpt_ikv_rp","type-cpt_ikv_rp","status-publish","has-post-thumbnail","hentry","tag-barrier-technologies","tag-multilayer-systems","tag-packaging","tag-plasma-coating","research_fields-plasma-technology"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>StrainCoat | IKV-Aachen<\/title>\n<meta name=\"description\" content=\"In the development of sustainable plastic packaging, plasma coatings are ideally suited for use as a gas and water vapor barrier. On the other hand, their low elongation tolerance means that they are only suitable to a limited extent for applications with increased mechanical loads. This was the starting point for the DFG project StrainCoat, in which damage mechanisms and possible countermeasures were researched.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ikv-aachen.de\/en\/rp\/straincoat\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"StrainCoat | IKV-Aachen\" \/>\n<meta property=\"og:description\" content=\"In the development of sustainable plastic packaging, plasma coatings are ideally suited for use as a gas and water vapor barrier. On the other hand, their low elongation tolerance means that they are only suitable to a limited extent for applications with increased mechanical loads. 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