| Autor: |
Jing Ge, Mengmeng Qin, Xu Zhang, Xiaoyu Yang, Ping Yang, Hui Wang, Gejun Liu, Xinlei Zhou, Bo Zhang, Zhiguo Qu, Yiyu Feng, Wei Feng |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
SmartMat, Vol 5, Iss 6, Pp n/a-n/a (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2688-819X |
| DOI: |
10.1002/smm2.1300 |
| Popis: |
Abstract Low‐temperature energy harvest, delivery, and utilization pose significant challenges for thermal management in extreme environments owing to heat loss during transport and difficulty in temperature control. Herein, we propose a light‐driven photo‐energy delivery device with a series of photo‐responsive alkoxy‐grafted azobenzene‐based phase‐change materials (a‐g‐Azo PCMs). These a‐g‐Azo PCMs store and release crystallization and isomerization enthalpies, reaching a high energy density of 380.76 J/g even at a low temperature of −63.92 °C. On this basis, we fabricate a novel three‐branch light‐driven microfluidic control device for distributed energy recycling that achieves light absorption, energy storage, controlled movement, and selective release cyclically over a wide range of temperatures. The a‐g‐Azo PCMs move remote‐controllably in the microfluidic device at an average velocity of 0.11–0.53 cm/s owing to the asymmetric thermal expansion effect controlled by the temperature difference. During movement, the optically triggered heat release of a‐g‐Azo PCMs achieves a temperature difference of 6.6 °C even at a low temperature of −40 °C. These results provide a new technology for energy harvest, delivery, and utilization in low‐temperature environments via a remote manipulator. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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