Simulation and optimization design of optical properties of TiO2 nanofiber membranes based on finite difference time domain(FDTD)
Focusing on the imperative requirement for materials possessing both high solar reflectivity and low cost,by utilizing the finite difference time domain method,the relationship between the fiber diameters and the solar reflectivity of TiO2 nanofiber membranes was simulated.The results indicate that,at a TiO2 nanofiber diameter of 300 nm,the material demonstrates optimal broadband scattering capabilities,yielding an integrated scattering coefficient of 2.462 within the solar spectrum;the solar reflectivity demonstrates a direct correlation with the thickness of the fiber film,and the membrane material exhibits exceptional sunlight reflection performance while the thickness of the fiber film surpasses 150 μm.By manipulating the electrospinning process parameters and duration of spinning,TiO2 nanofiber membranes with varying fiber diameters and thicknesses were meticulously crafted.The solar reflectance test findings of the membrane material reveal that when the mean diameter of the fabricated TiO2 nanofibers is 293.2 nm and the thickness of the membrane is 155 μm,the membrane material exhibits a substantial solar reflectivity of 94.50％.
finite difference time domainTiO2nanofiber membranenumerical simulation
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