Effect of alkaline surface treatment on the mechanical and thermal performance of polyamide 11/ramie fiber composites

Effect of alkaline surface treatment on the mechanical and thermal performance of polyamide 11/ramie fiber composites | 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 Effect of alkaline surface treatment on the mechanical and thermal performance of polyamide 11/ramie fiber composites Van Hung Do, Duc Huynh Mai, Huu Trung Tran, Huu Dat Nguyen, Thi Thu Trang Nguyen, and 5 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7862623/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 In this study, a bio-based polyamide 11 (PA11) composite reinforced with alkali-treated ramie fiber (tRF) was successfully fabricated by hot pressing. To identify optimal treatment conditions, ramie fibers were subjected to alkaline treatment using NaOH concentrations of 0%, 1%, 3%, and 5% by weight. Treatment of ramie fibers with a 3% NaOH solution led to a remarkable 137.5% increase in tensile strength compared to untreated fibers, alongside improved surface characteristics and fiber purity. As a result, the PA11/tRF composite substantially improved overall performance. Specifically, tensile strength increased by 131.45% and flexural strength by an impressive 390.51% compared to neat PA11. Advanced characterization techniques, including dynamic mechanical thermal analysis (DMTA), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM), confirmed strong interfacial interactions and enhanced thermal stability of the PA11/ramie fiber composite. These outstanding results demonstrate the effectiveness of alkali-treated ramie fibers in reinforcing PA11, establishing the PA11/tRF composite as a strong candidate for sustainable, high-performance, and eco-friendly material applications. Polyamide 11 ramie fibers bio-composite mechanical-thermal properties Full Text Additional Declarations No competing interests reported. Supplementary Files graphicabstracs.jpg 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. 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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-7862623","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":550182946,"identity":"0c818d2c-43e6-4692-9dfc-c719ae9050e3","order_by":0,"name":"Van Hung Do","email":"","orcid":"","institution":"Institute of Materials Science","correspondingAuthor":false,"prefix":"","firstName":"Van","middleName":"Hung","lastName":"Do","suffix":""},{"id":550182947,"identity":"877b6aec-8c4f-42aa-907f-56df45227a76","order_by":1,"name":"Duc Huynh Mai","email":"","orcid":"","institution":"Institute of Materials 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