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Kirigami-processed cellulose nanofiber films for smart heat dissipation by convection
NPG Asia Materials ( IF 9.7 ) Pub Date : 2021-09-24 , DOI: 10.1038/s41427-021-00329-5
Kojiro Uetani 1 , Yintong Huang 1 , Hirotaka Koga 1 , Masaya Nogi 1 , Keitaro Kasuya 2 , Jiahao Wang 2 , Rikuya Watanabe 3 , Toshifumi Satoh 3 , Shota Tsuneyasu 4
Affiliation  

Heat dissipation has become increasingly important in electronics. Conventional convection cooling systems have significant material and dimensional constraints, and they have difficulty meeting the heat dissipation, miniaturization, and flexibility requirements of next-generation smart electronics. Here, we used kirigami (the traditional art of paper cutting) with a thermally conductive cellulose nanofiber film to propose a flexible cooling system through convective heat dissipation. By stretching the Amikazari (net decoration) pattern produced by kirigami and allowing air convection through its aperture at 3.0 m/s, the thermal resistance was reduced to approximately one-fifth of that without kirigami and convection. The kirigami apertures defined the outlet air velocity, resulting in a significant increase in the heat-transfer coefficient. Our kirigami heat dissipation concept enables the design of electronics using a variety of film materials as shape-variant cooling structures, which will inspire a wide range of thermal engineering and electronics applications.



中文翻译:

Kirigami 处理的纤维素纳米纤维薄膜通过对流进行智能散热

散热在电子产品中变得越来越重要。传统的对流冷却系统具有明显的材料和尺寸限制,难以满足下一代智能电子产品的散热、小型化和灵活性要求。在这里,我们使用带有导热纤维素纳米纤维薄膜的剪纸(传统剪纸艺术)提出了一种通过对流散热的灵活冷却系统。通过拉伸Amikazari剪纸制作的(网状装饰)图案,允许空气以 3.0 m/s 的速度通过其孔径对流,热阻减少到没有剪纸和对流的情况下的五分之一左右。剪纸孔定义了出口空气速度,导致传热系数显着增加。我们的 kirigami 散热概念使使用各种薄膜材料作为形状变化的冷却结构的电子设计成为可能,这将激发广泛的热工程和电子应用。

更新日期:2021-09-24
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