A transparent and flexible double-layer protective film composed of PVDF-TPU for efficient radiative cooling

IF 6.3 2区材料科学 Q2 ENERGY & FUELS Solar Energy Materials and Solar Cells Pub Date : 2025-06-15 Epub Date: 2025-02-26 DOI:10.1016/j.solmat.2025.113546

Chao Shi , Shengyu Chen , Xiongbo Yang , Guiguang Qi , Yiteng Tu , Weiwei Hu , Junxia Mao , Yunqi Wang , Yulong Qiao , Xinyu Tan

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Abstract

Radiative cooling (RC) is a passive cooling technique that operates without requiring energy input, which can effectively alleviate the strain on car cooling systems caused by high temperatures during summer, particularly in the context of the widespread adoption of electric vehicles. A flexible transparent double-layer radiative cooling film based on Polyvinylidene Fluoride (PVDF) and Thermoplastic Polyurethane (TPU) as car protective film is proposed in this work. The transparency of the PVDF-TPU (PT) film reaches 71 %, preserving the aesthetic appearance of the vehicle, while exhibiting an emissivity rate of 98 %. The outdoor cooling experiments conducted on a clear summer day in China Three Gorges University (Yichang city) resulted in a significant sub-ambient temperature reduction of 17.3 °C. Furthermore, the flexible PT double-layer film can be tailored and applied to precisely conform to the unique contours of each vehicle, effectively protecting its paint from potential scratches caused by external elements such as sand or branches.

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由 PVDF-TPU 组成的透明柔性双层保护膜，可实现高效辐射冷却

辐射冷却（RC）是一种无需能量输入的被动冷却技术，可以有效缓解夏季高温对汽车冷却系统造成的压力，特别是在电动汽车广泛采用的背景下。提出了一种以聚偏氟乙烯（PVDF）和热塑性聚氨酯（TPU）为保护膜的柔性透明双层辐射冷却膜。PVDF-TPU （PT）薄膜的透明度达到71%，保留了车辆的美观外观，同时显示出98%的发射率。在一个晴朗的夏季，三峡大学（宜昌）进行了室外降温实验，亚环境温度显著降低了17.3°C。此外，灵活的PT双层膜可以定制和应用，以精确符合每辆车的独特轮廓，有效地保护其油漆免受沙子或树枝等外部因素造成的潜在划痕。

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麦克林

DMAC

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PVDF

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DMAC

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PVDF

来源期刊

Solar Energy Materials and Solar Cells 工程技术-材料科学：综合

CiteScore

12.60

自引率

11.60%

发文量

513

审稿时长

47 days

期刊介绍： Solar Energy Materials & Solar Cells is intended as a vehicle for the dissemination of research results on materials science and technology related to photovoltaic, photothermal and photoelectrochemical solar energy conversion. Materials science is taken in the broadest possible sense and encompasses physics, chemistry, optics, materials fabrication and analysis for all types of materials.