A Streamlined Integration Method for Lightweight Composite Foams with Intelligently Thermal-Adjustable Electromagnetic Shielding Effectiveness

A Streamlined Integration Method for Lightweight Composite Foams with Intelligently Thermal-Adjustable Electromagnetic Shielding Effectiveness | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article A Streamlined Integration Method for Lightweight Composite Foams with Intelligently Thermal-Adjustable Electromagnetic Shielding Effectiveness Junxing Zhang, Wenjing Qi, Lingjun Zeng, Bai Xue, Lan Xie, Yixiong Feng This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7188185/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Given the swift advancement of the intelligent era, the development of smart adjustable electromagnetic interference (EMI) shielding composites is necessary to tackle the escalating complexity of application scenarios. Herein, a straightforward dip-coating approach was employed to fabricate thermal-adjustable melamine foam (MF)/polydopamine (PDA)/MXene/trans-1,4-polyisprene (TPI) (MPMF/TPI) EMI shielding composite foams, using MF as three-dimensional (3D) skeletons, PDA as bridging agent, MXene as electrically conductive filler, and TPI as shape memory function body. In consequence, MPMF/TPI composite foams exhibit excellent thermal stimulus shape memory function for the adjustment of total EMI shielding effectiveness (SE T ) under self-fixing deformations. Particularly, MPMF/TPI-26.0 foam with 60% compressed strain exhibits the adjustable SE T of 31.4 dB, 36.5 dB, 41.7 dB, and 50.9 dB at the recovery rate of 0%, 33.3%, 66.7%, and 96.6%, respectively, when it is stimulated at 100°C for 0 s, 10 s, 40 s, and 80 s, respectively. Notably, at the recovery rate of 96.6%, the compressed MPMF/TPI-26.0 foam holds excellent 96.0% restoration of EMI SE T on basis of the original MPMF/TPI-26.0 foam (53.0 dB). So as to further enhance the EMI shielding performance, MPMF/TPI/graphite paper (GP) was fabricated by integrating MPMF/TPI foam with GP through a facile all-in-one patch method. Remarkably, MPMF/TPI/GP-5.6 reveals the absolutely green absorption-dominant shielding mechanism with EMI SE T of 74.8 dB and immense A of 0.87. The asymmetrical conductive network construction enables an "absorption-reflection-reabsorption" mechanism, ensuring robust EMI shielding performances and efficient electromagnetic wave absorption. This innovative strategy creates the potential applications of shape memory composites for intelligently adjustable EMI shielding in the areas of advanced electronics and smart devices. Intelligently adjustable MXene Shape memory Electromagnetic interference shielding Asymmetrical structures Full Text Additional Declarations No competing interests reported. Supplementary Files Supplementarymaterial.docx Graphicabstract.tif Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-7188185","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":532043167,"identity":"539215bc-e386-4fae-b753-194dfa5c9a08","order_by":0,"name":"Junxing Zhang","email":"","orcid":"","institution":"Guizhou University","correspondingAuthor":false,"prefix":"","firstName":"Junxing","middleName":"","lastName":"Zhang","suffix":""},{"id":532043168,"identity":"8c7ea750-18b5-4333-b1b1-4e0b44b52ab0","order_by":1,"name":"Wenjing Qi","email":"","orcid":"","institution":"Guizhou 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structures","lastPublishedDoi":"10.21203/rs.3.rs-7188185/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-7188185/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eGiven the swift advancement of the intelligent era, the development of smart adjustable electromagnetic interference (EMI) shielding composites is necessary to tackle the escalating complexity of application scenarios. Herein, a straightforward dip-coating approach was employed to fabricate thermal-adjustable melamine foam (MF)/polydopamine (PDA)/MXene/trans-1,4-polyisprene (TPI) (MPMF/TPI) EMI shielding composite foams, using MF as three-dimensional (3D) skeletons, PDA as bridging agent, MXene as electrically conductive filler, and TPI as shape memory function body. In consequence, MPMF/TPI composite foams exhibit excellent thermal stimulus shape memory function for the adjustment of total EMI shielding effectiveness (SE\u003csub\u003eT\u003c/sub\u003e) under self-fixing deformations. Particularly, MPMF/TPI-26.0 foam with 60% compressed strain exhibits the adjustable SE\u003csub\u003eT\u003c/sub\u003e of 31.4 dB, 36.5 dB, 41.7 dB, and 50.9 dB at the recovery rate of 0%, 33.3%, 66.7%, and 96.6%, respectively, when it is stimulated at 100\u0026deg;C for 0 s, 10 s, 40 s, and 80 s, respectively. Notably, at the recovery rate of 96.6%, the compressed MPMF/TPI-26.0 foam holds excellent 96.0% restoration of EMI SE\u003csub\u003eT\u003c/sub\u003e on basis of the original MPMF/TPI-26.0 foam (53.0 dB). So as to further enhance the EMI shielding performance, MPMF/TPI/graphite paper (GP) was fabricated by integrating MPMF/TPI foam with GP through a facile all-in-one patch method. Remarkably, MPMF/TPI/GP-5.6 reveals the absolutely green absorption-dominant shielding mechanism with EMI SE\u003csub\u003eT\u003c/sub\u003e of 74.8 dB and immense A of 0.87. The asymmetrical conductive network construction enables an \"absorption-reflection-reabsorption\" mechanism, ensuring robust EMI shielding performances and efficient electromagnetic wave absorption. This innovative strategy creates the potential applications of shape memory composites for intelligently adjustable EMI shielding in the areas of advanced electronics and smart devices.\u003c/p\u003e","manuscriptTitle":"A Streamlined Integration Method for Lightweight Composite Foams with Intelligently Thermal-Adjustable Electromagnetic Shielding Effectiveness","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-10-24 04:49:34","doi":"10.21203/rs.3.rs-7188185/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"a1c4daa1-8c73-49a0-b0eb-c4442188ab39","owner":[],"postedDate":"October 24th, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2025-12-06T12:53:44+00:00","versionOfRecord":[],"versionCreatedAt":"2025-10-24 04:49:34","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-7188185","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-7188185","identity":"rs-7188185","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}