Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (06): 55-60.doi: 10.13475/j.fzxb.20191002606

• Textile Engineering • Previous Articles     Next Articles

Estimating water content of acetate fiber spunlaced nonwovens with dielectric spectroscopy

LÜ Hanming1(), WANG Xiangyu1, LIU Fengkun2   

  1. 1. School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
    2. China Textile Information Center, Beijing 100025, China
  • Received:2019-10-14 Revised:2020-03-15 Online:2020-06-15 Published:2020-06-28

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Abstract:

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.

Key words: acetate spunlaced nonwoven fabric, moisture content, dielectric spectrum, three-stage drying method, dielectric constant

CLC Number: 

  • TS101

Fig.1

Sample capacitor structure and capacitor. (a)Sample capacitor structure; (b)Samplecapacitance"

Fig.2

Dielectric spectra of samples with different moisture contents"

Fig.3

Dielectric constant of different volume fractions of dried samples"

Fig.4

Relationship between volume fraction and dielectric constant of samples at 1 Hz and 1×106 Hz in dry samples"

Tab.1

Relationship between volume fraction and dielectric constant of sample at different frequencies"

频率/Hz 拟合曲线 R2
1×106 Y=0.013 80X+0.992 64 0.979 98
8×105 Y=0.013 87X+0.990 51 0.980 49
6×105 Y=0.013 95X+0.989 61 0.980 63
4×105 Y=0.014 04X+0.989 39 0.981 16
2×105 Y=0.014 31X+0.983 66 0.981 33
1×105 Y=0.014 57X+0.981 97 0.981 65
4×104 Y=0.014 73X+0.984 59 0.984 29
1×104 Y=0.015 08X+0.983 50 0.983 23
4×103 Y=0.015 24X+0.984 69 0.984 30
1×103 Y=0.015 42X+0.980 95 0.984 35
4×102 Y=0.015 44X+0.984 29 0.985 22
1×102 Y=0.015 69X+0.982 33 0.986 10
4×10 Y=0.015 42X+0.986 80 0.983 73
1×10 Y=0.015 86X+0.984 00 0.985 21
4 Y=0.015 86X+0.991 38 0.985 23
1 Y=0.018 71X+0.993 29 0.976 54

Fig.5

Relationship between volume fraction of water and dielectric constant in samples"

Fig.6

Relationship between volume fraction of water and dielectric constant at 1 Hz (a) and 1×106 Hz (b)"

Fig.7

Relationship between water content and dielectric constant of sample at 1×106 Hz (a) and 1 Hz (b)"

Fig.8

Relationship between water content and rate of change of dielectric constant per unit mass"

[1] 李晓峰. 新型纤维水分快速检测原理与方法的研究[D]. 长沙:湖南大学, 2002: 1-7.
LI Xiaofeng. Research on the principle and method of rapid detection of new fiber moisture[D]. Changsha: Hunan University, 2002: 1-7.
[2] 国萃. 检测木材含水率的电容传感器数学模型及其算法研究[D]. 哈尔滨:哈尔滨工程大学, 2014: 14-31.
GUO Cui. Mathematical model of capacitive sensor for detecting wood moisture content and its algorithm[D]. Harbin:Harbin Engineering University, 2014: 14-31.
[3] 吕汉明, 王晓叶, 马崇启. 基于电容传感器的醋酸纤维含油率检测[J]. 纺织学报, 2017,38(6):106-110,129.
LÜ Hanming, WANG Xiaoye, MA Chongqi. Detection of oil content of acetate fiber based on capacitive sensor[J]. Journal of Textile Research, 2017,38(6):106-110,129.
[4] PEETERS M. Independent evaluation of the dry mass and the moisture content of running textile yarns with a capacity-tipr meter[J]. Textile Research Journal, 1969,39(12):1081-1088.
[5] KAUSIK B, KOTHARI V K. Permittivity of woven fabrics: a comparison of dielectric formulas for air-fiber mixture[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2010,17(3):881-889.
[6] KAUSIK B, KOTHARI V K. Dielectric behaviour of polyamide monofilament fibers containing moisture as measured in woven form[J]. Fibers and Polymers, 2014,15(8):1745-1751.
[7] LÜ Hanming, WANG Xiaoye, MA Chongqi, et al. Estimating the dielectric constant of cellulose acetate fiber aggregation with its components volume fraction[J]. Journal of Engineered Fibers and Fabrics, 2017,12(3):72-80.
[8] LÜ Hanming, MA Li, MA Chongqi, et al. Estimation of the moisture regain of cotton fiber using the dielectric spectrum[J]. Textile Research Journal, 2014,84(19):2056-2064.
[9] 彭富兵, 焦晓宁, 叶小芳. 水刺非织造布烘燥工艺与优化[J]. 产业用纺织品, 2007(5):24-27.
PENG Fubing, JIAO Xiaoning, YE Xiaofang. Drying process and optimization of spunlaced nonwovens[J]. Technical Textiles, 2007(5):24-27.
[10] 王晓叶. 醋酸纤维含油率在线检测技术研究[D]. 天津:天津工业大学, 2017: 9-11
WANG Xiaoye. Research on on-line detection technology of acetate oil content[D]. Tianjin: Tiangong University, 2017: 9-11
[11] 马丽. 醋酸纤维集合体的介电常数测试及数学模型的建立[D]. 天津:天津工业大学, 2016: 19-21.
MA Li. Dielectric constant test of acetic acid fiber aggregate and establishment of mathematical model[D]. Tianjin: Tiangong University, 2016: 19-21.
[12] DONALD W L, JARVIS A S, JOHN G. The dielectric properties of various cotton varieties[J]. Textile Research Journal, 1973,43(2):110-114.
[13] LÜ Hanming, MA Chongqi. Experimental study on the dielectric spectrum of cotton fiber aggregation[J]. Advanced Materials Research, 2013,821/822:1475.
doi: 10.4028/www.scientific.net/AMR.821-822
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