织物湿扩散系数的实验研究

为了对人体着装稳态情况下织物内水分传输特性的进行有效的测定及评价。本文采用三步法分别实验测试了不同液面高度下装置的总湿阻、织物上表面空气层1湿阻、织物下表面与水表面之间的空气层2湿阻，利用回归方法确定水蒸汽在空气层2的等效扩散系数，进而计算出有空气层存在情况下织物的有效湿扩散系数。此方法能有效规避空气层对织物透湿性测试精度的影响，测试结果能深刻反映出织物传质的特性，为深入研究织物的舒适性提供了实验基础。

Experimental study of moisture diffusivity for fabrics

In order to measure and value the moisture transfer within the fabric used in the clothing under stead state. Three-step method were employed to determine the water vapor resistance of the whole apparatus, the water vapor resistance of the air layer 1 upon fabric surface and the water vapor resistance of the air layer 2 between the fabric’s lower surface and the water surface. The effective moisture diffusion coefficient in air layer 2 was determined by the regressive method, and then calculated the effective moisture diffusion coefficient of fabric on the condition of air layer exists. This method can effectively avoid the influence of the air layer on the test accuracy of measuring water vapor permeability of fabrics. The test results can reflect the mass transfer characteristics of the fabrics and provided a experimental basis for the fabric comfort study.