Experimental investigation οf bio-based polymers reinforced with graphene oxide

Experimental investigation οf bio-based polymers reinforced with graphene oxide | 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 Experimental investigation οf bio-based polymers reinforced with graphene oxide Aikaterini N. Gargala, Panagiota V. Polydoropoulou, Konstantinos Tserpes This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4783895/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 28 Oct, 2024 Read the published version in Applied Composite Materials → Version 1 posted 9 You are reading this latest preprint version Abstract Graphene oxide (GO) is a commonly used additive to enhance the mechanical properties of epoxy polymers. The efficiency of GO can be significantly influenced by various parameters, such as the quality of GO and the homogeneity of its dispersion. Efficient dispersion of graphene within the epoxy medium can notably improve the mechanical properties of multifunctional polymers. This work aims to maximize the effect of GO on the mechanical properties of bio-based polymers by synthesizing high-quality GO and achieving efficient dispersion in the epoxy. To this end, we investigated the effect of adding solvents (acetone, THF) on the mechanical behavior of multifunctional bio-based polymers subjected to several types of static loading. Five different types of materials were examined: neat epoxy resin as the reference material, enhanced epoxy resin without solvent, enhanced epoxy with acetone solvent, enhanced epoxy resin with THF solvent, and epoxy resin enhanced with pure graphite powder. The concentration of GO or graphite was maintained at 0.5 wt%. The findings were analyzed using Scanning Electron Microscope (SEM), Thermogravimetric Analysis (TGA), and Raman Spectroscopy. A significant increase in the tensile strength of polymers filled with GO without solvent was observed compared to the enhanced materials with solvents. Additionally, the fracture toughness properties were improved. SEM analysis of the fracture surfaces revealed resin penetration into the graphene sheets, indicating strong bonding of the amino groups to the graphene oxide in the case of the enhanced epoxy resin without solvent. In contrast, in the enhanced epoxies with the two types of solvents, the bonding between the GO and epoxy appeared to be either deteriorated or destroyed. TGA analysis revealed that both the neat and GO-reinforced resins without solvent were thermally stable up to 360°C, beyond which the material began to melt and decompose. Raman spectra showed the vibrations of the epoxy ring during the curing process, with the intensity of the observed peaks indicating the quantity of free epoxides in the samples. Finally, it was revealed that the enhanced material with GO exhibited reduced intensity (fewer free epoxides) due to the connection of epoxides with the functional groups on the surface of the graphene oxide. Biobased Polymers Graphene Oxide Graphite Preparation of Nanocomposites Solvent Mechanical Properties SEM TGA Raman Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 28 Oct, 2024 Read the published version in Applied Composite Materials → Version 1 posted Editorial decision: Revision requested 09 Sep, 2024 Reviews received at journal 09 Sep, 2024 Reviewers agreed at journal 19 Aug, 2024 Reviews received at journal 19 Aug, 2024 Reviewers agreed at journal 15 Aug, 2024 Reviewers invited by journal 08 Aug, 2024 Editor assigned by journal 25 Jul, 2024 Submission checks completed at journal 25 Jul, 2024 First submitted to journal 22 Jul, 2024 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. 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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-4783895","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":342330151,"identity":"7521fe73-1e8b-48a0-a9bb-aba27bbee82d","order_by":0,"name":"Aikaterini N. Gargala","email":"","orcid":"","institution":"University of Patras","correspondingAuthor":false,"prefix":"","firstName":"Aikaterini","middleName":"N.","lastName":"Gargala","suffix":""},{"id":342330153,"identity":"696fec7f-be63-4527-ac90-401a46c1ddf6","order_by":1,"name":"Panagiota V. 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The efficiency of GO can be significantly influenced by various parameters, such as the quality of GO and the homogeneity of its dispersion. Efficient dispersion of graphene within the epoxy medium can notably improve the mechanical properties of multifunctional polymers. This work aims to maximize the effect of GO on the mechanical properties of bio-based polymers by synthesizing high-quality GO and achieving efficient dispersion in the epoxy. To this end, we investigated the effect of adding solvents (acetone, THF) on the mechanical behavior of multifunctional bio-based polymers subjected to several types of static loading. Five different types of materials were examined: neat epoxy resin as the reference material, enhanced epoxy resin without solvent, enhanced epoxy with acetone solvent, enhanced epoxy resin with THF solvent, and epoxy resin enhanced with pure graphite powder. The concentration of GO or graphite was maintained at 0.5 wt%. 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Raman spectra showed the vibrations of the epoxy ring during the curing process, with the intensity of the observed peaks indicating the quantity of free epoxides in the samples. 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