Li counterion-exchanged TEMPO-oxidized cellulose nanofibers as a copper electrode seal for short-circuit failure inhibition
Short-circuit failure caused by water or moisture should be avoided in electronic devices. Traditionally, electrodes are sealed with epoxy resin to prevent failure. We previously reported that sealing copper electrodes with sodium-type 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized cellulose...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-03-01
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| Series: | Carbohydrate Polymer Technologies and Applications |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666893924002287 |
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| author | Chenyang Li Hitomi Yagyu Shun Ishioka Takaaki Kasuga Hirotaka Koga Masaya Nogi |
| author_facet | Chenyang Li Hitomi Yagyu Shun Ishioka Takaaki Kasuga Hirotaka Koga Masaya Nogi |
| author_sort | Chenyang Li |
| collection | DOAJ |
| description | Short-circuit failure caused by water or moisture should be avoided in electronic devices. Traditionally, electrodes are sealed with epoxy resin to prevent failure. We previously reported that sealing copper electrodes with sodium-type 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized cellulose nanofibers (TOCNs) inhibited failure. Sodium carboxylate groups in TOCNs are counterion-exchangeable, and then ion exchange in TOCNs changes their properties, such as hydrophilicity, and oxygen permeability. In this study, we evaluated the properties of different ion-exchanged TOCNs as copper electrode seals. TOCN ion-exchanged with lithium carboxyl groups (TOCN–Li) showed equivalent water swelling ability with TOCNs with sodium carboxylate groups (TOCN–Na). Therefore, the TOCN–Li-sealed electrodes successfully prevented short circuit, as long as the TOCN–Na. Moreover, TOCN–Li layers have low coefficient of thermal expansion that limits the thermal exfoliation of the substrates, high adhesion strength that prevents physical peeling from substrates, and self-extinguishing, inhibits burning. These findings are expected to accelerate the development of sustainable electronic devices. |
| format | Article |
| id | doaj-art-a7f71d13591d471183a9f4eeeddb159d |
| institution | DOAJ |
| issn | 2666-8939 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Carbohydrate Polymer Technologies and Applications |
| spelling | doaj-art-a7f71d13591d471183a9f4eeeddb159d2025-08-20T02:52:23ZengElsevierCarbohydrate Polymer Technologies and Applications2666-89392025-03-01910064810.1016/j.carpta.2024.100648Li counterion-exchanged TEMPO-oxidized cellulose nanofibers as a copper electrode seal for short-circuit failure inhibitionChenyang Li0Hitomi Yagyu1Shun Ishioka2Takaaki Kasuga3Hirotaka Koga4Masaya Nogi5SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Ibaraki, Osaka 567-0047, JapanSANKEN (The Institute of Scientific and Industrial Research), Osaka University, Ibaraki, Osaka 567-0047, JapanSANKEN (The Institute of Scientific and Industrial Research), Osaka University, Ibaraki, Osaka 567-0047, JapanSANKEN (The Institute of Scientific and Industrial Research), Osaka University, Ibaraki, Osaka 567-0047, JapanSANKEN (The Institute of Scientific and Industrial Research), Osaka University, Ibaraki, Osaka 567-0047, JapanCorresponding author.; SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Ibaraki, Osaka 567-0047, JapanShort-circuit failure caused by water or moisture should be avoided in electronic devices. Traditionally, electrodes are sealed with epoxy resin to prevent failure. We previously reported that sealing copper electrodes with sodium-type 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized cellulose nanofibers (TOCNs) inhibited failure. Sodium carboxylate groups in TOCNs are counterion-exchangeable, and then ion exchange in TOCNs changes their properties, such as hydrophilicity, and oxygen permeability. In this study, we evaluated the properties of different ion-exchanged TOCNs as copper electrode seals. TOCN ion-exchanged with lithium carboxyl groups (TOCN–Li) showed equivalent water swelling ability with TOCNs with sodium carboxylate groups (TOCN–Na). Therefore, the TOCN–Li-sealed electrodes successfully prevented short circuit, as long as the TOCN–Na. Moreover, TOCN–Li layers have low coefficient of thermal expansion that limits the thermal exfoliation of the substrates, high adhesion strength that prevents physical peeling from substrates, and self-extinguishing, inhibits burning. These findings are expected to accelerate the development of sustainable electronic devices.http://www.sciencedirect.com/science/article/pii/S2666893924002287Electrochemical migrationTEMPO-oxidized cellulose nanofibersCopper electrode sealShort-circuit failure Water swellingFlame retardance |
| spellingShingle | Chenyang Li Hitomi Yagyu Shun Ishioka Takaaki Kasuga Hirotaka Koga Masaya Nogi Li counterion-exchanged TEMPO-oxidized cellulose nanofibers as a copper electrode seal for short-circuit failure inhibition Carbohydrate Polymer Technologies and Applications Electrochemical migration TEMPO-oxidized cellulose nanofibers Copper electrode seal Short-circuit failure Water swelling Flame retardance |
| title | Li counterion-exchanged TEMPO-oxidized cellulose nanofibers as a copper electrode seal for short-circuit failure inhibition |
| title_full | Li counterion-exchanged TEMPO-oxidized cellulose nanofibers as a copper electrode seal for short-circuit failure inhibition |
| title_fullStr | Li counterion-exchanged TEMPO-oxidized cellulose nanofibers as a copper electrode seal for short-circuit failure inhibition |
| title_full_unstemmed | Li counterion-exchanged TEMPO-oxidized cellulose nanofibers as a copper electrode seal for short-circuit failure inhibition |
| title_short | Li counterion-exchanged TEMPO-oxidized cellulose nanofibers as a copper electrode seal for short-circuit failure inhibition |
| title_sort | li counterion exchanged tempo oxidized cellulose nanofibers as a copper electrode seal for short circuit failure inhibition |
| topic | Electrochemical migration TEMPO-oxidized cellulose nanofibers Copper electrode seal Short-circuit failure Water swelling Flame retardance |
| url | http://www.sciencedirect.com/science/article/pii/S2666893924002287 |
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