杰纳斯薄膜将辐射制冷和制热结合在一起,实现全天候主动/被动个人热管理

IF 10 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Xin Meng, Qi Zhao, Zhaochuan Chen, Qiang Li, Xuemei Chen
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引用次数: 0

摘要

人们开发了具有被动辐射冷却(PRC)/被动辐射加热(PRH)功能的纺织品,以解决不同气候条件下的人体热舒适问题。虽然具有单一被动辐射冷却/被动辐射加热功能的材料已有报道,但它们往往只具有冷却或加热一种功能,这对实现高效、可控的个人热管理造成了限制。在此,我们提出了一种由 PVDF-HFP/ZrO2 冷却层和 Mxene/CNT 加热层组成的双模 Janus 薄膜,可实现全天候高效 PRC/PRH。由于 ZrO2 纳米粒子的天然高折射率和 PVDF-HFP 纳米纤维对太阳光的强烈散射,冷却层的太阳反射率高达 97.1%。在大气窗口中,冷却侧的红外线发射率为 93%,白天的亚环境冷却温度为 8.8 °C,夜间为 7 °C。同时,Mxene/CNT 的协同作用使加热面具有很高的太阳吸收率和导电率,从而使 PRH 能力显著提高,最高可达 19 °C,并具有出色的主动焦耳加热能力,可作为温度补偿。双模 Janus 薄膜只需翻转接口,改变面向天空的一面,就能切换冷却/加热模式,从而在复杂多变的环境中实现高效、持续的个人热管理。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Janus film coupling radiative cooling and heating for all-day active/passive personal thermal management

Textiles with passive radiative cooling (PRC)/passive radiative heating (PRH) capabilities have been developed to address human thermal comfort in different climate scenarios. Although materials with single PRC/PRH function have been reported, they tended to exhibit only one function of either cooling or heating, which was restrictive in achieving efficient and controllable personal thermal management. Herein, we propose a dual-mode Janus film composed of a PVDF-HFP/ZrO2 cooling layer and a Mxene/CNT heating layer for efficient all-day PRC/PRH. Owing to the natural high refractive index of ZrO2 nanoparticles and the strong scattering of sunlight by the PVDF-HFP nanofibers, the cooling side exhibits a high solar reflectance of 97.1 %. With an infrared emittance of 93 % in atmospheric window, the cooling side achieves subambient cooling temperatures of 8.8 °C during daytime and 7 °C during nighttime. Meanwhile, the Mxene/CNT synergy enables the heating side to exhibit high solar absorbance and electrical conductivity, resulting in a significant PRH capability of up to 19 °C and an outstanding active Joule heating capability as a temperature compensation. The dual-mode Janus film is able to switch cooling/heating modes by simply flipping the interface to alter the sky-facing side, enabling efficient and continuous personal thermal management in complex and changeable environments.

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来源期刊
Materials Today Physics
Materials Today Physics Materials Science-General Materials Science
CiteScore
14.00
自引率
7.80%
发文量
284
审稿时长
15 days
期刊介绍: Materials Today Physics is a multi-disciplinary journal focused on the physics of materials, encompassing both the physical properties and materials synthesis. Operating at the interface of physics and materials science, this journal covers one of the largest and most dynamic fields within physical science. The forefront research in materials physics is driving advancements in new materials, uncovering new physics, and fostering novel applications at an unprecedented pace.
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