基于时域有限差分法的TiO2纳米纤维膜光学数值模拟及优化设计
Simulation and optimization design of optical properties of TiO2 nanofiber membranes based on finite difference time domain(FDTD)
晏榆洋 1郭竑宇 2斯阳3
作者信息
- 1. 广安职业技术学院经济管理学院,四川广安
- 2. 东华大学纺织科技创新中心,上海;东华大学纺织学院,上海
- 3. 东华大学纺织科技创新中心,上海
- 折叠
摘要
针对高太阳光反射率和低成本的材料开发需求,基于时域有限差分法模拟TiO2纳米纤维膜中结构参数对膜材料反射性能的影响规律,结果表明:当TiO2纳米纤维直径为300 nm时,材料具有最优的宽带散射性能,其太阳光波段内的积分散射率为2.462;太阳光反射率与纤维膜厚度呈正相关,当纤维膜厚度增至150 μm时,膜材料具有优异的太阳光反射性能.通过调控静电纺丝工艺参数和纺丝时间,制备出不同纤维直径和不同厚度的TiO2纳米纤维膜材料.膜材料的太阳光反射率测试结果表明:当所制备的TiO2纳米纤维平均直径为293.2 nm、膜厚度为155 μm时,膜材料具有高太阳光反射率(94.50％).
Abstract
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％.
关键词
时域有限差分法/TiO2/纳米纤维膜/数值模拟Key words
finite difference time domain/TiO2/nanofiber membrane/numerical simulation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据