Abstract
Heat transfer through an expanded polytetrafluorethylene (ePTFE) membrane used in functional clothing is a key process in the design of membrane-based clothing. A fractal model for the thermal conductivity of an ePTFE membrane is demonstrated by considering the specific microstructure within the ePTFE membrane with the “nodes-fibrils” model. The prediction results from the proposed model are compared with calculated values from another theoretical model and are also validated by experimental data. The present model is more suitable for evaluating the effective thermal conductivity of a biaxial stretching PTFE membrane.
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