通过冻融促进的非溶剂诱导相分离实现辐射冷却分层对齐多孔聚偏氟乙烯薄膜

IF 4.1 2区 化学 Q2 POLYMER SCIENCE Chinese Journal of Polymer Science Pub Date : 2024-05-07 DOI:10.1007/s10118-024-3128-2
Yiting Zhang, Jiahui Sun, Yufeng Wang, Yunchen Wu, Chun Huang, Chao Zhang, Tianxi Liu
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引用次数: 0

摘要

被动式日间辐射冷却(PDRC)是一种创新的可持续冷却技术,在解决能源危机方面潜力巨大。尽管有关辐射冷却器的报道不胜枚举,但设计一种简单、高效、易于生产的系统仍然是一项挑战。在本文中,我们介绍了通过冻融促进非溶剂诱导相分离策略开发的分层排列多孔聚偏二氟乙烯(HAP-PVDF)薄膜。这种薄膜具有定向微孔阵列和随机纳米孔,可在阳光直射条件下实现高效的辐射冷却性能。在 HAP-PVDF 薄膜中同时加入微孔和纳米孔后,其太阳反射率高达 97%,红外热发射率高达 96%,从而在晴天和阴天分别以 18.3°C 和 13.1°C 的温度进行亚环境制冷。此外,HAP-PVDF 薄膜还具有优异的柔韧性和疏水性。理论计算进一步证实,在太阳光强度为 1000 W-m-2 的情况下,辐射冷却功率为 94.8 W-m-2,其性能可与大多数已报道的辐射冷却器相媲美。
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A Radiative-Cooling Hierarchical Aligned Porous Poly(vinylidene fluoride) Film by Freeze-Thaw-Promoted Nonsolvent-Induced Phase Separation

Passive daytime radiative cooling (PDRC) is an innovative and sustainable cooling technology that holds immense potential for addressing the energy crisis. Despite the numerous reports on radiative coolers, the design of a straightforward, efficient, and readily producible system remains a challenge. Herein, we present the development of a hierarchical aligned porous poly(vinylidene fluoride) (HAP-PVDF) film through a freeze-thaw-promoted nonsolvent-induced phase separation strategy. This film features oriented microporous arrays in conjunction with random nanopores, enabling efficient radiative cooling performance under direct sunlight conditions. The incorporation of both micro- and nano-pores in the HAP-PVDF film results in a remarkable solar reflectance of 97% and a sufficiently high infrared thermal emissivity of 96%, facilitating sub-environmental cooling at 18.3 °C on sunny days and 13.1 °C on cloudy days. Additionally, the HAP-PVDF film also exhibits exceptional flexibility and hydrophobicity. Theoretical calculations further confirm a radiative cooling power of 94.8 W·m−2 under a solar intensity of 1000 W·m−2, demonstrating a performance comparable to the majority of reported radiative coolers.

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来源期刊
Chinese Journal of Polymer Science
Chinese Journal of Polymer Science 化学-高分子科学
CiteScore
7.10
自引率
11.60%
发文量
218
审稿时长
6.0 months
期刊介绍: Chinese Journal of Polymer Science (CJPS) is a monthly journal published in English and sponsored by the Chinese Chemical Society and the Institute of Chemistry, Chinese Academy of Sciences. CJPS is edited by a distinguished Editorial Board headed by Professor Qi-Feng Zhou and supported by an International Advisory Board in which many famous active polymer scientists all over the world are included. The journal was first published in 1983 under the title Polymer Communications and has the current name since 1985. CJPS is a peer-reviewed journal dedicated to the timely publication of original research ideas and results in the field of polymer science. The issues may carry regular papers, rapid communications and notes as well as feature articles. As a leading polymer journal in China published in English, CJPS reflects the new achievements obtained in various laboratories of China, CJPS also includes papers submitted by scientists of different countries and regions outside of China, reflecting the international nature of the journal.
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