{"id":4530,"date":"2024-07-21T15:22:12","date_gmt":"2024-07-21T06:22:12","guid":{"rendered":"https:\/\/tuat-chemphys.net\/?p=4530"},"modified":"2024-07-21T15:34:56","modified_gmt":"2024-07-21T06:34:56","slug":"%e3%83%9d%e3%83%aa%e3%82%a4%e3%83%9f%e3%83%89%e7%a0%94%e7%a9%b6%e3%81%ae%e7%94%bb%e6%9c%9f%e7%9a%84%e9%80%b2%e5%b1%95%ef%bc%9a%e5%88%86%e5%ad%90%e6%8b%a1%e6%95%a3%e3%81%ab%e9%96%a2%e3%81%99%e3%82%8b","status":"publish","type":"post","link":"https:\/\/tuat-chemphys.net\/?p=4530","title":{"rendered":"\u30dd\u30ea\u30a4\u30df\u30c9\u7814\u7a76\u306e\u9032\u5c55\uff1a\u5206\u5b50\u62e1\u6563\u306b\u95a2\u3059\u308b\u65b0\u305f\u306a\u77e5\u898b Polyimide Research: New Insights into Molecular Diffusion"},"content":{"rendered":"\n

\u30dd\u30ea\u30a4\u30df\u30c9\u7814\u7a76\u306e\u753b\u671f\u7684\u9032\u5c55\uff1a\u5206\u5b50\u62e1\u6563\u306b\u95a2\u3059\u308b\u65b0\u305f\u306a\u77e5\u898b Breakthrough in Polyimide Research: New Insights into Molecular Diffusion<\/strong><\/p>\n\n\n\n

\u5927\u6a4b\u7814\u7a76\u5ba4\u3068\u5171\u540c\u7814\u7a76\u8005\u305f\u3061\u304c\u30dd\u30ea\u30a4\u30df\u30c9\u3068\u305d\u306e\u524d\u99c6\u4f53\u306b\u304a\u3051\u308b\u5206\u5b50\u62e1\u6563\u30d7\u30ed\u30bb\u30b9\u306e\u7406\u89e3\u306b\u5927\u304d\u306a\u9032\u5c55\u3092\u9042\u3052\u307e\u3057\u305f\u30022024\u5e743\u67087\u65e5\u306b Industrial & Engineering Chemistry Research \u8a8c\uff08\u7c73\u56fd\u5316\u5b66\u4f1a\u96d1\u8a8c\uff09<\/a>\u306b\u63b2\u8f09\u3055\u308c\u305f\u7814\u7a76\u8ad6\u6587\u306f\u3001\u524d\u99c6\u4f53\u30ef\u30cb\u30b9\u3068\u56fa\u4f53\u30dd\u30ea\u30a4\u30df\u30c9\u306b\u304a\u3051\u308b\u5206\u5b50\u306e\u62e1\u6563\u4fc2\u6570\u306b\u95a2\u3059\u308b\u65b0\u305f\u306a\u6d1e\u5bdf\u3092\u63d0\u6848\u3057\u3066\u3044\u307e\u3059\u3002\u7814\u7a76\u30c1\u30fc\u30e0\u306f\u3001\u30d1\u30eb\u30b9\u78c1\u5834\u52fe\u914d\u6838\u78c1\u6c17\u5171\u9cf4\u6cd5\u3084\u30ad\u30e3\u30d4\u30e9\u30ea\u30fc\u30ab\u30e9\u30e0\u9006\u30ac\u30b9\u30af\u30ed\u30de\u30c8\u30b0\u30e9\u30d5\u30a3\u30fc\u306a\u3069\u306e\u5148\u7aef\u6280\u8853\u3092\u7528\u3044\u3066\u3001\u30ef\u30cb\u30b9\u3084\u30dd\u30ea\u30a4\u30df\u30c9\u30de\u30c8\u30ea\u30c3\u30af\u30b9\u4e2d\u306e\u30b8\u30e1\u30c1\u30eb\u30a2\u30bb\u30c8\u30a2\u30df\u30c9\uff08DMAc\uff09\u3068\u30dd\u30ea\u30a2\u30df\u30c3\u30af\u9178\uff08PAA\uff09\u306e\u62e1\u6563\u4fc2\u6570\u3092\u6e2c\u5b9a\u3057\u307e\u3057\u305f<\/a>\u3002Researchers (Ohashi Lab and collaborators) have made significant progress in understanding the molecular diffusion process in polyimides and their precursors. A study published in Industrial & Engineering Chemistry Research<\/a> (an ACS journal, 2024) sheds light on the diffusion coefficients of molecules in precursor varnishes and solid polyimides<\/a>.The research team used advanced techniques such as pulsed-field gradient nuclear magnetic resonance and capillary column inverse gas chromatography to measure the diffusion coefficients of dimethylacetamide (DMAc) and poly(amic acid) (PAA) in varnishes and polyimide matrices<\/a>.<\/p>\n\n\n\n

Key findings include:<\/strong> \u4e3b\u306a\u767a\u898b\u306b\u306f\u4ee5\u4e0b\u304c\u542b\u307e\u308c\u307e\u3059<\/p>\n\n\n\n

    \n
  1. DMAc\u306e\u62e1\u6563\u6027\u306fPAA\u3068\u306e\u76f8\u4e92\u4f5c\u7528\u306b\u5f37\u304f\u5f71\u97ff\u3055\u308c\u308b DMAc diffusivity is strongly influenced by its interaction with PAA<\/li>\n\n\n\n
  2. PAA\u306e\u62e1\u6563\u306f\u6fc3\u5ea6\u306e\u5897\u52a0\u306b\u4f34\u3044\u3001\u30dd\u30ea\u30de\u30fc\u9396\u306e\u7d61\u307f\u5408\u3044\u306b\u3088\u308a\u6e1b\u5c11\u3059\u308b PAA diffusion decreases with increasing concentration due to polymer chain entanglement<\/li>\n\n\n\n
  3. \u30dd\u30ea\u30a4\u30df\u30c9\u30de\u30c8\u30ea\u30c3\u30af\u30b9\u4e2d\u306eDMAc\u306e\u62e1\u6563\u306e\u7bc4\u56f2 DMAc diffusion in polyimide matrices ranges from 10-12<\/sup>\u304b\u308910-10<\/sup> cm2<\/sup> s-1<\/sup> at 180-220\u00b0C<\/li>\n<\/ol>\n\n\n\n

    \u3053\u308c\u3089\u306e\u57fa\u790e\u7684\u306a\u30c7\u30fc\u30bf\u306f\u30a4\u30df\u30c9\u5316\u30d7\u30ed\u30bb\u30b9\u4e2d\u306e\u5206\u5b50\u62e1\u6563\u3092\u7406\u89e3\u3059\u308b\u4e0a\u3067\u91cd\u8981\u3067\u3042\u308a\u3001\u30dd\u30ea\u30a4\u30df\u30c9\u306e\u5de5\u696d\u751f\u7523\u306e\u6539\u5584\u306b\u3064\u306a\u304c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059<\/a>\u3002\u3053\u306e\u753b\u671f\u7684\u306a\u7814\u7a76\u306f\u9ad8\u5206\u5b50\u79d1\u5b66\u306e\u5206\u91ce\u306b\u8ca2\u732e\u3057\u3001\u30dd\u30ea\u30a4\u30df\u30c9\u6750\u6599\u306b\u4f9d\u5b58\u3059\u308b\u3055\u307e\u3056\u307e\u306a\u7523\u696d\u3078\u306e\u5fdc\u7528\u304c\u671f\u5f85\u3055\u308c\u307e\u3059\u3002These fundamental data are crucial for understanding molecular diffusion during the imidization process and could lead to improvements in industrial production of polyimides<\/a>.This groundbreaking research contributes to the field of polymer science and has potential applications in various industries that rely on polyimide materials.<\/p>\n\n\n

    \n
    \"\"<\/a>
    https:\/\/doi.org\/10.1021\/acs.iecr.3c03748<\/a><\/figcaption><\/figure>\n<\/div>","protected":false},"excerpt":{"rendered":"

    \u30dd\u30ea\u30a4\u30df\u30c9\u306e\u5de5\u696d\u751f\u7523\u306e\u6539\u5584\u306b\u3064\u306a\u304c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002could lead to improvements in industrial production of polyimides.<\/p>\n","protected":false},"author":1,"featured_media":4531,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[9],"tags":[14,16],"class_list":["post-4530","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research","tag-advanced-materials-creation","tag-measurement-devices"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/tuat-chemphys.net\/wp-content\/uploads\/2024\/07\/ohashi-2024.gif?fit=500%2C282&ssl=1","jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":6764,"url":"https:\/\/tuat-chemphys.net\/?p=6764","url_meta":{"origin":4530,"position":0},"title":"Seminar 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carboxylic acids \u2014 SPR\u30bb\u30f3\u30b5\u30fc\uff1a\u9162\u9178\u306a\u3069\u306e\u30ab\u30eb\u30dc\u30ad\u30b7\u30eb\u57fa\u3092\u6301\u3064\u5206\u5b50\u306e\u9ad8\u9078\u629e\u7684\u691c\u51fa","author":"unet","date":"2025-11","format":false,"excerpt":"\u672c\u7814\u7a76\u306f\u3001\u8868\u9762\u30d7\u30e9\u30ba\u30e2\u30f3\u5171\u9cf4\uff08SPR\uff09\u30bb\u30f3\u30b5\u30fc\u306b\u30dd\u30ea\u30a8\u30c1\u30ec\u30f3\u30a4\u30df\u30f3\uff08PEI\uff09\u3092\u88c5\u98fe\u3059\u308b\u3053\u3068\u3067\u3001\u9162\u9178\u306a\u3069\u306e\u30ab\u30eb\u30dc\u30ad\u30b7\u30eb\u57fa\u3092\u6301\u3064\u5206\u5b50\u3092\u9ad8\u9078\u629e\u7684\u306b\u691c\u51fa\u3067\u304d\u308b\u3053\u3068\u3092\u793a\u3057\u307e\u3057\u305f\u3002This work demonstrates that decorating SPR sensors with PEI enables highly selective detection of carboxylic acid like acetic acid.","rel":"","context":"In "Research Topics"","block_context":{"text":"Research 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