Synthesis and Gas Separation of HOF-21/Triphenylamine Polyimide Mixed Matrix Membranes

Synthesis and Gas Separation of HOF-21/Triphenylamine Polyimide Mixed Matrix Membranes | 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 Synthesis and Gas Separation of HOF-21/Triphenylamine Polyimide Mixed Matrix Membranes Junjie Qu, Junhao Mo, Shanshan Wu, Chao Shan, Chanjuan Liu, Xiaohua Huang This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8772424/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 A novel trianiline diamine monomer, 4,4'-diamino-4-(3,4,5-trimethoxy)triphenylamine (DATT), was synthesized from 3,4,5-trimethoxyaniline and 4-fluoronitrobenzene and copolymerized with 9,9'-bis(4-amino-3-fluorophenyl)fluorene (FFDA) and 4,4'-(hexafluoroisopropylidene) phthalic anhydride (6FDA) to prepare a novel category of polyimide MTPI which contains triphenylamine, methoxy, fluorenyl, and hexafluoroisopropylidene groups, mixed matrix membranes (MMMs) of HOF-21/MTPI were prepared by blending with HOF-21. The MMMs exhibits outstanding thermal stability ( T 10% > 278 ℃, T g > 398 ℃), hydrophobicity (water contact angle > 82°). In terms of gas separation performance, the 4%HOF-21/MTPI exhibit high CO 2 permeability (29.61 bar) and CO 2 /N 2 selectivity (25.32 bar) with improvements of 22.6% and 14.7%, respectively, compared to the substrate membrane, approaching the Robertson upper limit in 2008. polyimide mixed matrix membranes gas separation hydrogen-bonded organic frameworks Full Text Supplementary Files GraphicalAbstract.docx SupportingMaterials.docx Cite Share Download PDF Status: Under Review Version 1 posted Reviewers agreed at journal 09 Feb, 2026 Reviewers invited by journal 09 Feb, 2026 Editor invited by journal 08 Feb, 2026 Editor assigned by journal 03 Feb, 2026 First submitted to journal 02 Feb, 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-8772424","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":588153649,"identity":"f2bcb7e0-1912-4ff7-b509-55f5d15af474","order_by":0,"name":"Junjie Qu","email":"","orcid":"","institution":"","correspondingAuthor":false,"prefix":"","firstName":"Junjie","middleName":"","lastName":"Qu","suffix":""},{"id":588153650,"identity":"86ec7f92-54c2-4860-bf41-c8541dc80630","order_by":1,"name":"Junhao 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The MMMs exhibits outstanding thermal stability (\u003cem\u003eT\u003c/em\u003e\u003csub\u003e10%\u003c/sub\u003e \u0026gt; 278 ℃, \u003cem\u003eT\u003c/em\u003e\u003csub\u003e\u003cem\u003eg\u003c/em\u003e\u003c/sub\u003e \u0026gt; 398 ℃), hydrophobicity (water contact angle\u0026thinsp;\u0026gt;\u0026thinsp;82\u0026deg;). In terms of gas separation performance, the 4%HOF-21/MTPI exhibit high CO\u003csub\u003e2\u003c/sub\u003e permeability (29.61 bar) and CO\u003csub\u003e2\u003c/sub\u003e/N\u003csub\u003e2\u003c/sub\u003e selectivity (25.32 bar) with improvements of 22.6% and 14.7%, respectively, compared to the substrate membrane, approaching the Robertson upper limit in 2008.\u003c/p\u003e","manuscriptTitle":"Synthesis and Gas Separation of HOF-21/Triphenylamine Polyimide Mixed Matrix Membranes","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2026-02-11 02:58:48","doi":"10.21203/rs.3.rs-8772424/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"reviewerAgreed","content":"","date":"2026-02-09T10:27:53+00:00","index":0,"fulltext":""},{"type":"reviewersInvited","content":"","date":"2026-02-09T09:53:38+00:00","index":"","fulltext":""},{"type":"editorInvited","content":"Journal of Polymer Research","date":"2026-02-09T01:33:02+00:00","index":"","fulltext":""},{"type":"editorAssigned","content":"","date":"2026-02-04T04:55:31+00:00","index":"","fulltext":""},{"type":"submitted","content":"Journal of Polymer Research","date":"2026-02-03T02:32:39+00:00","index":"","fulltext":""}],"status":"published","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}}],"origin":"","ownerIdentity":"cdb292d5-3c0d-4c72-8a36-5327295d1dbf","owner":[],"postedDate":"February 11th, 2026","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"under-review","subjectAreas":[],"tags":[],"updatedAt":"2026-05-08T10:55:23+00:00","versionOfRecord":[],"versionCreatedAt":"2026-02-11 02:58:48","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-8772424","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-8772424","identity":"rs-8772424","version":["v1"]},"buildId":"XKTyCvWXoU3ODBz1xrDgd","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}