Analysis of the moisture diffusion transfer through fibrous porous membrane used for waterproof breathable fabrics |
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| Authors: | Fanglong Zhu Yu Zhou Suyan Liu |
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| Institution: | 1. Department of Textile and Clothing, Zhongyuan University of Technology, Zhengzhou, People’s Republic of China
2. Shanghai Fire Research Institute of MPS, Shanghai, People’s Republic of China
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| Abstract: | In this paper, we propose a new fractal model to determine the moisture effective diffusivity of porous membrane such as expanded polytetrafluorethylene membrane, by taking account of both parallel and perpendicular channels to diffusion flow direction. With the consideration of both the Knudsen and bulk diffusion effect, a relationship between micro-structural parameters and effective moisture diffusivity is deduced. The effective moisture diffusivities predicted by the present fractal model are compared with moisture diffusion experiment data and calculated values obtained from other theoretical models. |
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