Passive cooling technologies have shown great interest recently due to their free electricity, especially for radiative cooling (RC), and evaporation cooling (EC). While single-mode passive cooling is often limited by environmental conditions, such as sunlight, clouds, and humidity, resulting in a limited cooling performance. To address these issues, an adhesive hydrogel paint is designed for passive heat dissipation in the daytime or high workload via radiative coupled evaporation cooling (REC), which also can realize water self-replenishment at night or low workload by RC-assisted adsorption for moisture capture. Solar reflectance = 0.91 and thermal emittance = 0.94 are obtained for RC. Excellent passive heat dissipation performance can be achieved by painting it on the 3D W-shaped substrate. Compared with the flat RC paint, the REC paint on a W-shape substrate achieves a temperature drop of 5.4 °C at the heating density of 100 W m, which is further increased to 11.4 °C at 400 W m due to multi-passive cooling strategies. This structural and material design provides a potential adhesive hydrogel paint for outdoor passive heat dissipation.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/smll.202412221 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Adhesive Hydrogel Paint for Passive Heat Dissipation via Radiative Coupled Evaporation Cooling.
Small
March 2025
School of Energy Science and Engineering, Central South University, Changsha, 430001, China.
Passive cooling technologies have shown great interest recently due to their free electricity, especially for radiative cooling (RC), and evaporation cooling (EC). While single-mode passive cooling is often limited by environmental conditions, such as sunlight, clouds, and humidity, resulting in a limited cooling performance. To address these issues, an adhesive hydrogel paint is designed for passive heat dissipation in the daytime or high workload via radiative coupled evaporation cooling (REC), which also can realize water self-replenishment at night or low workload by RC-assisted adsorption for moisture capture.
View Article and Find Full Text PDFDurable asymmetric silk fabric with rapid heat conduction, spectral selectivity and sweat transfer capabilities for effective personal thermal-moisture management.
J Colloid Interface Sci
March 2025
Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, China. Electronic address:
Silk fabric (SF) is a high-end textile frequently utilized in summer apparel. However, its ultraviolet absorption reduces the solar energy reflection, and the inherent hydrophilicity impedes effective sweat evaporation, thereby significantly compromising thermal-moisture comfort. Herein, we fabricated a multifunctional Janus SF with rapid heat dissipation, unidirectional moisture conduction and radiative cooling capabilities through a feasible two-step process.
View Article and Find Full Text PDFPhotoluminescent Core-Shell Structural Porous Fibers-Based Metafabric for Colored Daytime Passive Radiative Cooling.
ACS Nano
March 2025
National Engineering Research Center for Dyeing and Finishing of Textiles, Innovation Center for Textile Science and Technology, College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, P.R. China.
Passive radiative cooling technology provides a sustainable thermal management strategy for outdoor workers under extremely hot environments. However, daytime radiative cooling textiles typically appear white or mirror-like due to the near-complete reflection of sunlight, which poses a significant limitation for outdoor applications where visual aesthetics are important. Herein, we designed colored photoluminescent radiative cooling (CPRC) metafabrics, which are woven from carbon-dot-based coaxial porous fibers, to achieve effective radiative cooling without sacrificing color aesthetics.
View Article and Find Full Text PDFRetinal and cerebral hemodynamics redistribute to favor thermoregulation in response to passive environmental heating and heated exercise in humans.
Temperature (Austin)
October 2024
School of Human Sciences (Exercise and Sport Sciences), The University of Western Australia, Perth, Australia.
Core temperature (T) changes, alongside exercise, affect hemodynamic responses across different conduit and microvascular beds. This study investigated impacts of ecologically valid environmental heat and exercise exposures on cerebral, skin and retinal vascular responses by combining physiological assessments alongside computational fluid dynamics (CFD) modeling. Young, healthy participants ( = 12) were exposed to environmental passive heating (PH), and heated exercise (HE) (ergometer cycling), in climate-controlled conditions (50 mins, 40°C, 50% relative humidity) while maintaining upright posture.
View Article and Find Full Text PDFFacial cooling improves thermal perceptions and maintains the interleukin-6 response during passive heating: A sex comparison.
Temperature (Austin)
September 2024
School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK.
Passively elevating body temperature can trigger a potentially beneficial acute inflammatory response. However, heat therapy often causes discomfort and negative thermal perceptions, particularly in females who generally have lower heat tolerance than males. This study aimed to evaluate the impact of facial cooling on thermal comfort and interleukin-6 concentration in response to 60 minutes of dry heat exposure, and to investigate sex differences in physiological responses and perceptions.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!