{"id":72276,"date":"2025-02-04T14:33:23","date_gmt":"2025-02-04T12:33:23","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=72276"},"modified":"2025-02-25T12:43:50","modified_gmt":"2025-02-25T10:43:50","slug":"without-glue-it-sticks","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/newsletter\/without-glue-it-sticks.html","title":{"rendered":"Without glue, it sticks?"},"content":{"rendered":"<div  class='flex_column av-m6krraxq-97d69656d4c919a6c4f01dd78dbe01eb av_one_fifth  avia-builder-el-0  el_before_av_two_fifth  avia-builder-el-first  first flex_column_div'     ><section  class='av_textblock_section av-m6qgt8d5-7925551fd54575a14886cb8b92bbf181'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/02\/electro_adhesion_5-1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-72284 size-full\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/02\/electro_adhesion_5-1.jpg\" alt=\"\" width=\"181\" height=\"493\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/02\/electro_adhesion_5-1.jpg 181w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/02\/electro_adhesion_5-1-110x300.jpg 110w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/02\/electro_adhesion_5-1-4x12.jpg 4w\" sizes=\"auto, (max-width: 181px) 100vw, 181px\" \/><\/a><\/p>\n<\/div><\/section><\/div>\n<div  class='flex_column av-12axgqv-9c88f83cb603be85ecae3180f63936dc av_two_fifth  avia-builder-el-2  el_after_av_one_fifth  el_before_av_two_fifth  flex_column_div'     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-m6kmtun7-c32a066972c03f9fdb4bad5c745a39b9\">\n#top .av_textblock_section.av-m6kmtun7-c32a066972c03f9fdb4bad5c745a39b9 .avia_textblock{\ntext-align:justify;\n}\n<\/style>\n<section  class='av_textblock_section av-m6kmtun7-c32a066972c03f9fdb4bad5c745a39b9'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h1><\/h1>\n<h1 style=\"text-align: left;\"><span style=\"color: #52c704;\">Without glue, it sticks?<\/span><\/h1>\n<blockquote>\n<p>Using an electro-adhesion device, we are characterizing for the first time the adhesion between a film and a substrate obtained without an intermediate layer of adhesive. The latter&rsquo;s properties are generally poorly controlled, making adhesion studies extremely difficult. For this purpose, ultrasonic waves are generated and detected by lasers to probe the interface without contact. The results obtained using this non-destructive method clearly demonstrate the sensitivity of surface acoustic waves to only electrostatically-induced variations in film adhesion.<\/p>\n<\/blockquote>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-m6kmp2oh-21712fc694f40209ce1a2c4f04d96e51\">\n#top .av_textblock_section.av-m6kmp2oh-21712fc694f40209ce1a2c4f04d96e51 .avia_textblock{\ntext-align:justify;\n}\n<\/style>\n<section  class='av_textblock_section av-m6kmp2oh-21712fc694f40209ce1a2c4f04d96e51'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h1><\/h1>\n<p><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-72200 size-full\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_1.jpg\" alt=\"\" width=\"873\" height=\"493\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_1.jpg 873w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_1-300x169.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_1-768x434.jpg 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_1-18x10.jpg 18w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_1-705x398.jpg 705w\" sizes=\"auto, (max-width: 873px) 100vw, 873px\" \/><\/a><\/p>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-m6kr52e8-fe07b1934f4b46d4f2707b454a604b39\">\n#top .av_textblock_section.av-m6kr52e8-fe07b1934f4b46d4f2707b454a604b39 .avia_textblock{\ntext-align:justify;\n}\n<\/style>\n<section  class='av_textblock_section av-m6kr52e8-fe07b1934f4b46d4f2707b454a604b39'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p><strong><span style=\"color: #ff7b00;\"><span style=\"color: #008080;\">\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-8dfdff27d004ce6bf7c09dd95e02a67c\">\n.av_font_icon.av-mqde7m-8dfdff27d004ce6bf7c09dd95e02a67c{\ncolor:#52c704;\nborder-color:#52c704;\n}\n.av_font_icon.av-mqde7m-8dfdff27d004ce6bf7c09dd95e02a67c .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-8dfdff27d004ce6bf7c09dd95e02a67c avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue803' data-av_iconfont='entypo-fontello' ><\/span><\/span><\/span><\/span><\/strong><span style=\"color: #52c704;\">This study concerns material adhesion, which is often crucial to the reliability of coating technologies. Specifically, the quality of contact between a polyvinyl chloride film and an aluminum substrate is assessed non-destructively by Laser Ultrasonics.<\/span> Generally, a layer of adhesive is used between the film and the substrate, but its properties (thickness, homogeneity, etc.) are difficult to control and complicate adhesion characterization. For this reason, an original electro-adhesion device (Figure 1) is used to vary the film&rsquo;s adhesion by applying electrostatic fields of different intensities, thus dispensing with the need for an adhesive layer (Figure 2). In addition, the propagation of surface acoustic waves in the structure is sensitive to adhesion via the dispersion of phase velocities. Considering the effect of normal and tangential stiffnesses at the interface, dispersion curves for Rayleigh modes were determined. These were also obtained using the finite element method (Figures 3 and 4). Experimentally, these guided waves are generated by a frequency-doubled Nd:YAG laser and detected by a Mach-Zehnder heterodyne interferometer. Analysis of the dispersion curves of different modes has enabled us to distinguish each level of adhesion. <strong><span style=\"color: #52c704;\">These innovative results pave the way for future Laser Ultrasonics studies to better quantify the phenomenon of electro-adhesion for various materials.<\/span><\/strong><\/p>\n<hr \/>\n<p><strong><span style=\"color: #ff7b00;\"><span style=\"color: #008080;\">\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-1-62e863421aa787cad05a807e78f1d5f6\">\n.av_font_icon.av-mqde7m-1-62e863421aa787cad05a807e78f1d5f6{\ncolor:#52c704;\nborder-color:#52c704;\n}\n.av_font_icon.av-mqde7m-1-62e863421aa787cad05a807e78f1d5f6 .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-1-62e863421aa787cad05a807e78f1d5f6 avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue826' data-av_iconfont='entypo-fontello' ><\/span><\/span><\/span><\/span><\/strong>Find out more:<\/p>\n<p>Mustapha Baher, Meriem Chrifi Alaoui, Fr\u00e9d\u00e9ric Jenot, Mohammadi Ouaftouh, Marc Duquennoy, \u00ab\u00a0Characterization of electro-adhesion using surface waves generated and detected by Laser-Ultrasonics\u00a0\u00bb, NDT&amp;E International, Volume 147, 2024, 103191, ISSN 0963-8695, <a href=\"https:\/\/doi.org\/10.1016\/j.ndteint.2024.103191\" target=\"_blank\" rel=\"noopener\">https:\/\/doi.org\/10.1016\/j.ndteint.2024.103191<\/a>\u00a0 <a href=\"https:\/\/hal.science\/hal-04664705v1\" target=\"_blank\" rel=\"noopener\">https:\/\/hal.science\/hal-04664705v1<\/a><\/p>\n<div  class='avia-button-wrap av-rpqvoq-f6125f21e684ced9bc9fa1aa5342d242-wrap avia-button-left  avia-builder-el-8  el_after_av_font_icon  avia-builder-el-last'><a href='mailto:Meriem.Chrifialaoui@uphf.fr'  class='avia-button av-rpqvoq-f6125f21e684ced9bc9fa1aa5342d242 av-link-btn avia-icon_select-yes-left-icon avia-size-light avia-position-left avia-color-silver'   aria-label=\"Meriem Chrifi Alaoui \"><span class='avia_button_icon avia_button_icon_left' aria-hidden='true' data-av_icon='\ue805' data-av_iconfont='entypo-fontello'><\/span><span class='avia_iconbox_title' >Meriem Chrifi Alaoui <\/span><\/a><\/div>\n<\/div><\/section><\/p><\/div><div  class='flex_column av-oh4xuv-ff0d7ecebf95d5919022be6698e97727 av_two_fifth  avia-builder-el-9  el_after_av_two_fifth  avia-builder-el-last  flex_column_div'     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-m6qgxb2m-a0eafba11a31f12e8ead87aaaa5b6974\">\n#top .av_textblock_section.av-m6qgxb2m-a0eafba11a31f12e8ead87aaaa5b6974 .avia_textblock{\ncolor:#fefef9;\n}\n<\/style>\n<section  class='av_textblock_section av-m6qgxb2m-a0eafba11a31f12e8ead87aaaa5b6974'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='av-small-hide av-mini-hide avia_textblock av_inherit_color'  itemprop=\"text\" ><p><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/02\/carre_neutre.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-72285\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/02\/carre_neutre.jpg\" alt=\"\" width=\"250\" height=\"56\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/02\/carre_neutre.jpg 175w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/02\/carre_neutre-18x4.jpg 18w\" sizes=\"auto, (max-width: 250px) 100vw, 250px\" \/><\/a><\/p>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-m6kr3jox-a5640ae8b9f9ad624ead06a802a1f58d\">\n#top .av_textblock_section.av-m6kr3jox-a5640ae8b9f9ad624ead06a802a1f58d .avia_textblock{\ntext-align:justify;\n}\n<\/style>\n<section  class='av_textblock_section av-m6kr3jox-a5640ae8b9f9ad624ead06a802a1f58d'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><div id=\"attachment_72211\" style=\"width: 510px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-72211\" class=\"wp-image-72211\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion.jpg\" alt=\"\" width=\"500\" height=\"267\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion.jpg 847w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion-300x160.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion-768x411.jpg 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion-18x10.jpg 18w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion-845x453.jpg 845w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion-705x377.jpg 705w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><p id=\"caption-attachment-72211\" class=\"wp-caption-text\">Figure 1: (a) Electro-adhesion device, (b) Field source used, (c) Experimental setup<\/p><\/div>\n<hr \/>\n<div id=\"attachment_72215\" style=\"width: 510px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_2.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-72215\" class=\"wp-image-72215\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_2.jpg\" alt=\"\" width=\"500\" height=\"171\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_2.jpg 1400w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_2-300x103.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_2-1030x352.jpg 1030w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_2-768x263.jpg 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_2-18x6.jpg 18w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_2-705x241.jpg 705w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><p id=\"caption-attachment-72215\" class=\"wp-caption-text\">Figure 2: Adhesion of a PVC film to an aluminum substrate for two electrostatic fields of increasing intensity. Applied voltage 3.6 kV (a) and 3.8 kV (b)<\/p><\/div>\n<hr \/>\n<div id=\"attachment_72216\" style=\"width: 510px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_3.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-72216\" class=\"wp-image-72216\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_3.jpg\" alt=\"\" width=\"500\" height=\"252\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_3.jpg 1200w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_3-300x151.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_3-1030x519.jpg 1030w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_3-768x387.jpg 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_3-18x9.jpg 18w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_3-705x355.jpg 705w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><p id=\"caption-attachment-72216\" class=\"wp-caption-text\">Figure 3: Rayleigh modes determined by finite elements and theoretical dispersion curves (black lines) for perfect film\/substrate contact<\/p><\/div>\n<hr \/>\n<div id=\"attachment_72217\" style=\"width: 510px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_4.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-72217\" class=\"wp-image-72217\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_4.jpg\" alt=\"\" width=\"500\" height=\"323\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_4.jpg 1200w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_4-300x194.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_4-1030x666.jpg 1030w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_4-768x497.jpg 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_4-18x12.jpg 18w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/01\/electro_adhesion_4-705x456.jpg 705w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><p id=\"caption-attachment-72217\" class=\"wp-caption-text\">Figure 4: Finite element simulation of the normal displacement of acoustic waves generated in the film\/substrate structure<\/p><\/div>\n<\/div><\/section><\/p><\/div><\/p>","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[297],"tags":[],"class_list":["post-72276","post","type-post","status-publish","format-standard","hentry","category-newsletter"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/72276","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/comments?post=72276"}],"version-history":[{"count":0,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/72276\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=72276"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=72276"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=72276"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}