Atmospheric Water Harvesting by Large-Scale Radiative Cooling Cellulose-Based Fabric.
Nano Lett
; 22(7): 2618-2626, 2022 04 13.
Article
en En
| MEDLINE
| ID: mdl-35364813
ABSTRACT
Atmospheric water harvesting (AWH) has received tremendous interest because of population growth, limited freshwater resources, and water pollution. However, key challenges remain in developing efficient, flexible, and lightweight AWH materials with scalability. Here, we demonstrated a radiative cooling fabric for AWH via its hierarchically structured cellulose network and hybrid sorption-dewing mechanisms. With 8.3% solar absorption and â¼0.9 infrared (IR) emissivity, the material can drop up to 7.5 °C below ambient temperature without energy consumption via radiative cooling. Water adsorption onto the hydrophilic functional groups of cellulose is dominated by sorption at low relative humidity (RH) and dewing at high RH. The cellulose network provides desirable mechanical properties with entangled high-aspect-ratio fibers over tens of adsorption-extraction cycles. In the field test, the cellulose sample exhibited water uptake of 1.29 kg/kg at 80% RH during the night. The profusion of radiative cooling fabric features desirable cost effectiveness and allows fast deployment into large-scale AWH applications.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Agua
/
Celulosa
Idioma:
En
Revista:
Nano Lett
Año:
2022
Tipo del documento:
Article
País de afiliación:
Estados Unidos