Radiative Cooling Nanofabric for Personal Thermal Management

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

40 Scopus Citations
View graph of relations


  • Mohammad Irfan Iqbal
  • Fengxin Sun
  • Hau Him Lee
  • Chi-Wai Kan

Related Research Unit(s)


Original languageEnglish
Pages (from-to)23577–23587
Journal / PublicationACS Applied Materials and Interfaces
Issue number20
Online published12 May 2022
Publication statusPublished - 25 May 2022


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 °C when compared to skin covered by a cotton textile. A heat-Transfer 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.

Research Area(s)

  • cooling textiles, electrospinning, energy saving, personal cooling, radiative cooling

Citation Format(s)

Radiative Cooling Nanofabric for Personal Thermal Management. / Iqbal, Mohammad Irfan; Lin, Kaixin; Sun, Fengxin et al.
In: ACS Applied Materials and Interfaces, Vol. 14, No. 20, 25.05.2022, p. 23577–23587.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review