CA/FAS/SiO2纳米纤维膜的制备及性能OA

To address the problems of poor biodegradability and insufficient air&moisture permeability of current thermal management materials,CA/FAS/SiO2 nanofibrous membranes were prepared using one-step electrospinning technology with renewable cellulose acetate(CA)as the matrix material,perfluorodecyl triethoxy silane(FAS)as the hydrophobic modifier,and SiO2 as the functional filler.The effects of FAS concentration on the microstructure,surface wettability,pore size,air and moisture permeability,mechanical property and radiative cooling performance of the fibrous membranes were investigated.The results showed when the FAS concentration was 11%,the prepared membrane exhibited optimal comprehensive performance,with a water contact angle of 147.0°,moisture permeability of 4 510 g/(m2·d),and air permeability of 146.7 mm/s.In terms of spectral performance,the nanofibrous membrane was achieved an average reflectance of 93.22%in the solar wavelength range(0.3 μm~2.5 μm)and the average emissivity was 82.31%in the atmospheric window band(8 μm~13 μm).Under outdoor testing conditions with average solar irradiance of 758 W/m²,the surface temperature of the membrane was reduced by a maximum of 9.0℃compared to the ambient temperature,demonstrating excellent passive radiative cooling effects.It is considered that the study provides a new technological pathway for developing textile materials that combine biodegradability with efficient thermal management functionality.