Radiative Cooling Nanofabric for Personal Thermal Management

被引:60
|
作者
Iqbal, Mohammad Irfan [1 ]
Lin, Kaixin [1 ]
Sun, Fengxin [2 ]
Chen, Siru [1 ]
Pan, Aiqiang [1 ]
Lee, Hau Him [1 ]
Kan, Chi-Wai [3 ]
Lin, Carol Sze Ki [1 ]
Tso, Chi Yan [1 ]
机构
[1] City Univ Hong Kong, Sch Energy & Environm, Kowloon, Hong Kong 999077, Peoples R China
[2] Jiangnan Univ, Coll Text Sci & Engn, Key Lab Ecotext, Minist Educ & Lab Soft Fibrous Mat, Wuxi 214122, Jiangsu, Peoples R China
[3] Hong Kong Polytech Univ, Inst Text & Clothing, Kowloon, Hong Kong 999077, Peoples R China
基金
中国国家自然科学基金;
关键词
cooling textiles; electrospinning; energy saving; personal cooling; radiative cooling;
D O I
10.1021/acsami.2c05115
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A wearable textile that is engineered to reflect incoming sunlight and allow the transmission of mid-infrared radiation simultaneously would have a great impact on the human body's thermal regulation in an outdoor environment. However, developing such a textile is a tough challenge. Using nanoparticle-doped polymer (zinc oxide and polyethylene) materials and electrospinning technology, we have developed a nanofabric with the desired optical properties and good applicability. The nanofabric offers a cool fibrous structure with outstanding solar reflectivity (91%) and mid-infrared transmissivity (81%). In an outdoor field test under exposure of direct sunlight, the nanofabric was demonstrated to reduce the simulated skin temperature by 9 degrees C when compared to skin covered by a cotton textile. A heattransfer model is also established to numerically assess the cooling performance of the nanofabric as a function of various climate factors, including solar intensity, ambient air temperature, atmospheric emission, wind speed, and parasitic heat loss rate. The results indicate that the nanofabric can completely release the human body from unwanted heat stress in most conditions, providing an additional cooling effect as well as demonstrating worldwide feasibility. Even in some extreme conditions, the nanofabric can also reduce the human body's cooling demand compared with traditional cotton textile, proving this material as a feasible solution for better thermoregulation of the human body. The facile fabrication of such textiles paves the way for the mass adoption of energy-free personal cooling technology in daily life, which meets the growing demand for healthcare, climate change, and sustainability.
引用
收藏
页码:23577 / 23587
页数:11
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