Study of Shaped Shapes of Cellulose Acetate Films Based on Mie Scattering

Chenbo Zhi; Yihan Zhang; Yingqin Shi; Xiaoyu Zhou; Fengjia Sun

doi:10.62051/ijmsts.v3n1.05

Authors

Chenbo Zhi
Yihan Zhang
Yingqin Shi
Xiaoyu Zhou
Fengjia Sun

DOI:

https://doi.org/10.62051/ijmsts.v3n1.05

Keywords:

Cellulose acetate, Mie scattering, Heteromorphic shape, Scattering efficiency, Backscattering efficiency factor

Abstract

The emerging cellulose acetate film is also a composite material with excellent cooling properties due to its excellent flexibility and good film-forming properties, and nowadays it has become a key material used for radiation cooling. Since the cross-section of the columnar skeleton of cellulose acetate film is irregular and heterogeneous, which is not the traditional circular shape, at present, domestic and foreign research mainly analyses the circular shape, and does not explore the influence of the heterogeneous shape on the scattering effect of cellulose acetate film in depth. Therefore, in this paper, through the Mie scattering formula, the complex refractive index of cellulose acetate film in actual measurement is substituted into the formula for the simulation of scattering efficiency, extinction efficiency, absorption efficiency and backward scattering efficiency factor of the particles, and on the basis of this, different size parameters of the particles are simulated to obtain the relationship between the scattering direction of the particles and the size parameters. After that, the heteromorphic shape was modelled and simulated based on the Fourier formula in polar coordinates, which was substituted into the simulation software for comparing the light scattering cross section of the heteromorphic shape with that of the traditional circular shape, and then the heteromorphic shape was adjusted and optimized on the basis of the same cellulose acetate film. It is found that the heteromorphic shape has a larger surface area than a circle, and its special shape can form an asymmetric radiation route, which can scatter the light emitted from the side better, thus providing a feasible graphical solution for the preparation of cellulose acetate radiation-cooled films.

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