Dry-jet wet spinning-mediated microstructural engineering for improving mechanical properties of pure chitosan fibers

Dry-jet wet spinning-mediated microstructural engineering for improving mechanical properties of pure chitosan fibers | 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 Dry-jet wet spinning-mediated microstructural engineering for improving mechanical properties of pure chitosan fibers Qiuyan Zhang, Jian Zhou, Huichuan Zhao, Liang Hong, Peng Chen This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9081989/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 5 You are reading this latest preprint version Abstract Chitosan-based bio-fibers demonstrate significant application potential in the fields of biomedicine and functional textiles, owing to their advantages such as excellent biocompatibility, antibacterial activity, renewability, and biodegradability. However, the strong intermolecular hydrogen bonding of chitosan hinders the formation of an ideal microstructure with high orientation, high crystallinity, and minimal defects under conventional wet-spinning conditions, resulting in unsatisfactory mechanical properties of chitosan fibers. To address this limitation, an air gap was introduced into the traditional wet-spinning process, establishing a dry-jet wet spinning approach. By controlling the drawing step within the air gap, pre-orientation of chitosan molecular chains was achieved prior to coagulation, thereby optimizing the fiber microstructure. Compared to wet-spun fibers, the dry-jet wet spun chitosan fibers exhibit a smoother and denser surface with markedly fewer microvoid defects. Both crystallinity and orientation are significantly enhanced, with the degree of orientation increasing with the draw ratio. At a spinneret draw ratio of 1.6, the dry-jet wet spun chitosan fiber achieved a mechanical strength of 2.13 cN/dtex, representing a substantial improvement over the wet-spun counterpart. This dry-jet wet spinning strategy offers an effective technical route for the large-scale production of high-performance chitosan fibers. chitosan fiber dry-jet wetting spinning microstructure mechanical properties Full Text Cite Share Download PDF Status: Under Review Version 1 posted Reviewers agreed at journal 24 Mar, 2026 Reviewers invited by journal 24 Mar, 2026 Editor invited by journal 20 Mar, 2026 Editor assigned by journal 17 Mar, 2026 First submitted to journal 17 Mar, 2026 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-9081989","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":611073290,"identity":"bff2f394-f2a6-40ef-aa35-47967c2cddd6","order_by":0,"name":"Qiuyan Zhang","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA/0lEQVRIiWNgGAWjYDACCQTJ+CDBwIaHn7+BeC3MBg8K0mQkZxwgSgsYsEk++HDYxqAhAb8O+dnNzx5+KbNI3HD87AGJBIPzPAYMBxg/fMzBrYVxzjFzY5lzEokbzuQlGCQY3OYxZ25glpy5DbcWZokEM2nJNqCWAzkGCSAtlg0H2Jh58Whhk0j/BtFy/o3BgQSDczxAEr8WHokcM8mPIC03cgwbEgwOENYiIZFTJs1wTsJ45o03xgwJBsk8kjMONuP1i/yM9G2SP8rqZPvO55j//PHHzp6fv/ngh494tICDgIeNgUHhAJzP2IBfPUjJD6AWecLqRsEoGAWjYKQCALvgVHz9C9VzAAAAAElFTkSuQmCC","orcid":"","institution":"Ningbo Institute of Materials Technology and Engineering CAS: Chinese Academy of Sciences Ningbo Institute of Materials Technology and Engineering","correspondingAuthor":true,"prefix":"","firstName":"Qiuyan","middleName":"","lastName":"Zhang","suffix":""},{"id":611073291,"identity":"3a88e963-743d-4692-b2a9-c7ce0bbad949","order_by":1,"name":"Jian Zhou","email":"","orcid":"","institution":"","correspondingAuthor":false,"prefix":"","firstName":"Jian","middleName":"","lastName":"Zhou","suffix":""},{"id":611073292,"identity":"7ee08c28-8b05-4d09-8afe-16ad12e941ad","order_by":2,"name":"Huichuan Zhao","email":"","orcid":"","institution":"","correspondingAuthor":false,"prefix":"","firstName":"Huichuan","middleName":"","lastName":"Zhao","suffix":""},{"id":611073293,"identity":"aa312974-d8a5-4e7d-b9ee-a5ff0895c02a","order_by":3,"name":"Liang Hong","email":"","orcid":"","institution":"","correspondingAuthor":false,"prefix":"","firstName":"Liang","middleName":"","lastName":"Hong","suffix":""},{"id":611073294,"identity":"38c3e87b-fc4b-43a9-9310-fcdecebb8458","order_by":4,"name":"Peng Chen","email":"","orcid":"","institution":"","correspondingAuthor":false,"prefix":"","firstName":"Peng","middleName":"","lastName":"Chen","suffix":""}],"badges":[],"createdAt":"2026-03-10 09:27:19","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-9081989/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-9081989/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":105566218,"identity":"3bf3f7dd-bf62-4438-aabc-9c243e49e6ea","added_by":"auto","created_at":"2026-03-27 12:55:45","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1316782,"visible":true,"origin":"","legend":"","description":"","filename":"Manuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-9081989/v1_covered_56fadc9a-a5d6-4d3a-a88b-1c00fdeb16ee.pdf"}],"financialInterests":"","formattedTitle":"Dry-jet wet spinning-mediated microstructural engineering for improving mechanical properties of pure chitosan fibers","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"journal-of-polymer-research","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"jpol","sideBox":"Learn more about [Journal of Polymer Research](https://www.springer.com/journal/10965)","snPcode":"10965","submissionUrl":"https://www.editorialmanager.com/jpol/","title":"Journal of Polymer Research","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false},"keywords":"chitosan fiber, dry-jet wetting spinning, microstructure, mechanical properties","lastPublishedDoi":"10.21203/rs.3.rs-9081989/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-9081989/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eChitosan-based bio-fibers demonstrate significant application potential in the fields of biomedicine and functional textiles, owing to their advantages such as excellent biocompatibility, antibacterial activity, renewability, and biodegradability. 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