Related Experiment Video
Updated: May 15, 2025

Fabric Moisture Uniform Control to Study the Influence of Air Impingement Parameters on Fabric Drying Characteristics
Published on: August 19, 2019
A Self-Cleaning Janus Textile for Highly Efficient Heating and Cooling Management
Li Yuan1, Siyuan Jia1, Sujin Shao1
1Key Laboratory for Intelligent Nano Materials and Devices of Ministry of Education, State Key Laboratory of Mechanics and Control for Aerospace Structures, and International Institute for Frontier Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
Abstract:
Textiles capable of achieving both solar heating and radiative cooling play a pivotal role in outdoor thermal management. Despite significant advancements, further improvements are necessary to enhance the optical performance and versatility. In this study, we developed a Janus textile comprising a porous poly(vinylidene fluoride-co-hexafluoropropylene) [P(VdF-HFP)HP] cooling layer (96.4% solar reflectance and 95.3% mid-infrared emissivity) and a Cu-nanoparticle-based heating layer (95.5% solar absorption and 89.1% mid-infrared reflectance). After 30 washing cycles, its performance remains stable. Field tests demonstrate impressive temperature differentials of +41.1 °C for heating and -4.5 °C for cooling relative to ambient conditions, thereby extending the thermal regulation range by 26.6 °C compared to conventional cotton textiles. Additionally, nanostructured surfaces impart hydrophobicity, oleophobicity, and fouling resistance. This design offers a sustainable solution with superior thermal management, stability, and self-cleaning ability for outdoor protection.
Related Concept Videos
Mechanism of heat transfer
Mechanisms of Heat Transfer
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
Mechanisms of Heat Transfer II
Heating and Cooling Curves
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance,...
Mechanisms of Heat Transfer I
Refrigerators and Heat Pumps
A household refrigerator removes heat from...

