Measurement of Water Absorption Perpendicular to Fabric Plane by Pressure Sensor Method and its Analysis
Measurement of Water Absorption Perpendicular to Fabric Plane by Pressure Sensor Method and its Analysis
复制标题
压力传感器法测量垂直织物平面吸水率及其分析
DOI：
10.2115/fiber.49.5_243
复制
发表时间：
1993
期刊：
影响因子：
--
通讯作者：
M. Niwa
中科院分区：
文献类型：
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作者：
Morihiro Yoneda;M. Niwa
翻译后摘要：一种压力传感器的方法，以测量垂直于织物平面的自发吸水。水的吸收是由放置在蓄水池底部的压力传感器检测的。用该装置测定了几种机织物的吸水率。吸水率M（t）（g/cm ~ 2）与时间平方根t（s）的关系可用一阶回归方程拟合。根据该关系式，可以求出吸水速度常数λ（g/cm 2/），可以使用λ和最大吸水率Mmax（g/cm 2/）来评价吸水率。通过泡点法测定织物的平均孔径，证明垂直于织物平面的吸水率不符合Washburn定律。用非线性扩散方程很好地解释了吸水现象，用[]很好地回归了M（t）。如果用晶格空间模拟纤维间的开孔结构，并将毛细作用引起的水在该网络中的流动视为无规行走，则可以理解，垂直于织物平面的吸水可以用扩散模型来解释。的运输机制是不同的面内毛细水流在以前的文件和水的吸收垂直于织物平面报道这里。因此，认为必须估计每个方向的吸水率，即。e.分别平行和垂直于织物。（1992年9月10日）
Abstract:A pressure sensor method was developed in order to measure spontaneous water uptake perpendicular to fabric plane. Water absorption was detected by a pressure sensor which was placed at the bottom of a water reservoir. Using this apparatus, water absorption of some types of woven fabrics was measured. Relation between water absorption, M (t) (g/cm2) and square root of time elapsed,t (s) is well fitted by first order regression equation. From this relation, water absorption rate constant kv (g/cm2/) can be obtained and water absorptivity can be evaluated using kv and Mmax (g/cm), maximum water absorption. Based on the measurement of mean pore diameter by bubble point method, it is shown that water absorption perpendicular to fabric plane does not follow Washburn's law. Water absorption phenomena is explained well by non-linear diffusion equation and the fact that M (t) is regressed well by [ is also explained by this model. If open pore structure between fibers is modelled by lattice space and water flow by capillary action is considered to be random walk within this network, it is understandable that water absorption perpendicular to fabric plane can be explained by diffusion model. The transport mechanism is different between in-plane capillary water flow reported in a previous paper and water absorption perpendicular to fabric plane reported here. Therefore, it is considered that water absorptivity has to be estimated for each direction, i. e. parallel and perpendicular to fabric, respectively. (Received September 10, 1992)