3D Printing Preparation of Thermal-management PVDF/MXene Porous Composite Materials
Radiative heat management is an important research area for passive cooling and heating of objects.However,regulating the unique electromagnetic spectrum reflection and emission properties of materials remains a challenge.To address this issue,PVDF/MXene layered composite porous materials with asymmetric MXene content distribution were fabricated using 3D printing.The cooling side(PVDF side)of the composite exhibited exceptional radiative cooling performance,with high reflectance(98.0％)in the solar band and high emissivity(95.4％)in the atmospheric window.The heating side(MXene side)demonstrated good radiative cooling performance,with low mid-infrared emissivity(18.2％)and high emissivity(70.5％)for solar absorption.Under cooling conditions,the composite porous material achieved a daytime radiative cooling power of 105.8 W·m-2 and an average cooling of 4.1 ℃.Under heating conditions,the heating side of the composite porous material heated up to 9.8 ℃ with an average warming of approximately 5.7 ℃.
万方数据
维普
