基于介电谱的醋酸酯水刺非织造布含水率估算  

Estimating water content of acetate fiber spunlaced nonwovens with dielectric spectroscopy

作　　者：吕汉明[1] 王翔宇 刘凤坤[2] LV Hanming;WANG Xiangyu;LIU Fengkun(School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China;China Textile Information Center, Beijing 100025, China)

机构地区：[1]天津工业大学纺织科学与工程学院,天津300387 [2]中国纺织信息中心,北京100025

出　　处：《纺织学报》2020年第6期55-60,共6页Journal of Textile Research

基　　金：国家自然科学基金项目(51003075,51403152)。

摘　　要：为估算醋酸酯水刺非织造布含水率,测试了不同体积分数与不同含水率醋酸酯非织造布的介电谱,分析了干燥醋酸酯非织造布的体积分数以及非织造布中水分的体积分数对其介电常数的影响,并建立了单位质量醋酸酯非织造布介电常数变化率与含水率的关系。实验结果显示:在干燥状态下醋酸酯的介电常数对电场频率不敏感,醋酸酯的体积分数与其介电常数都存在显著的线性关系;在非织造布-水两相集合体中水分的体积分数与其介电常数呈指数函数关系,在电场频率为1 Hz和1×106 Hz时含水率与其介电常数之间为指数函数关系,试样的含水率与其单位质量介电常数变化率之间存在幂函数关系。In order to estimate the moisture content of acetate spunlaced nonwovens,the dielectric spectra of acetate nonwovens with different volume fractions and different water contents were tested.The effect of the volume fraction of dry acetate nonwovens and the effect of the volume fraction of moisture on its dielectric constant were analyzed.And the relationship between the dielectric constant change rate of the unit mass acetate nonwoven and the water content was established.The experimental results show that the dielectric constant of dry acetate is not sensitive to the electric field frequency.There is a significant linear relationship between the volume fraction of acetate and its dielectric constant.At the same time,the volume fraction of water in the nonwoven fabric-water aggregate is exponentially related to the dielectric constant.When the electric field frequency is 1 Hz and 1×106 Hz,the moisture content of the sample has an exponential function relationship with its dielectric constant.There is a power function relationship between the moisture content of the sample and the change rate of the dielectric constant per unit mass.

关 键 词：醋酸酯水刺非织造布 含水率 介电谱 三段烘燥法 介电常数 

分 类 号：TS101[轻工技术与工程—纺织工程] TS171[轻工技术与工程—纺织科学与工程]