Dielectric properties in textile materials: a theoretical study

Mukherjee, Prabir K.

doi:10.1080/00405000.2018.1473710

Cited by 11 publications

(5 citation statements)

References 21 publications

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“…This observation was substantiated by the evidence that the yarns (and hence fibers) in the woven samples were oriented more in the fabric thickness (out-of-plane) direction than in the case of knitted samples (Figure 8)-according to the extended Maxwell Garnett theory [8], the orientation of high aspect ratio materials affects the permittivity of the mixture and the permittivity in the fabric thickness direction will be higher if the fibers (yarns) are aligned more in this direction [7]. A theoretical model that predicts the dielectric properties of textile materials from the moisture content was proposed by Mukherjee in 2018 [84]. According to this model, the real ( ' r,m  ) and imaginary ( '' r,m  ) components of the relative permittivity are expressed as a function of moisture by: A theoretical model that predicts the dielectric properties of textile materials from the moisture content was proposed by Mukherjee in 2018 [84].…”

Section: Dielectric Properties Of Fabrics-the Air-fiber-moisture Systemmentioning

confidence: 99%

“…A theoretical model that predicts the dielectric properties of textile materials from the moisture content was proposed by Mukherjee in 2018 [84]. According to this model, the real ( ' r,m  ) and imaginary ( '' r,m  ) components of the relative permittivity are expressed as a function of moisture by: A theoretical model that predicts the dielectric properties of textile materials from the moisture content was proposed by Mukherjee in 2018 [84]. According to this model, the real ( ' r,m  ) and imaginary ( '' r,m  ) components of the relative permittivity are expressed as a function of moisture by: A theoretical model that predicts the dielectric properties of textile materials from the moisture content was proposed by Mukherjee in 2018 [84].…”

Section: Dielectric Properties Of Fabrics-the Air-fiber-moisture Systemmentioning

confidence: 99%

“…According to this model, the real ( ' r,m  ) and imaginary ( '' r,m  ) components of the relative permittivity are expressed as a function of moisture by: A theoretical model that predicts the dielectric properties of textile materials from the moisture content was proposed by Mukherjee in 2018 [84]. According to this model, the real ( ' r,m  ) and imaginary ( '' r,m  ) components of the relative permittivity are expressed as a function of moisture by: A theoretical model that predicts the dielectric properties of textile materials from the moisture content was proposed by Mukherjee in 2018 [84]. According to this model, the real (ε r,m ) and imaginary (ε r,m ) components of the relative permittivity are expressed as a function of moisture by:…”

Section: Dielectric Properties Of Fabrics-the Air-fiber-moisture Systemmentioning

confidence: 99%

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Dielectric Properties of Textile Materials: Analytical Approximations and Experimental Measurements—A Review

Mukai

2022

Textiles

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Deciphering how the dielectric properties of textile materials are orchestrated by their internal components has far-reaching implications. For the development of textile-based electronics, which have gained ever-increasing attention for their uniquely combined features of electronics and traditional fabrics, both performance and form factor are critically dependent on the dielectric properties. The knowledge of the dielectric properties of textile materials is thus crucial in successful design and operation of textile-based electronics. While the dielectric properties of textile materials could be estimated to some extent from the compositional profiles, recent studies have identified various additional factors that have also substantial influence. From the viewpoint of materials characterization, such dependence of the dielectric properties of textile materials have given rise to a new possibility—information on various internal components could be, upon successful correlation, extracted by measuring the dielectric properties. In view of these considerable implications, this invited review paper summarizes various fundamental theories and principles related to the dielectric properties of textile materials. In order to provide an imperative basis for uncovering various factors that intricately influence the dielectric properties of textile materials, the foundations of the dielectrics and polarization mechanisms are first recapitulated, followed by an overview on the concept of homogenization and the dielectric mixture theory. The principal advantages, challenges and opportunities in the analytical approximations of the dielectric properties of textile materials are then discussed based on the findings from the recent literature, and finally a variety of characterization methods suitable for measuring the dielectric properties of textile materials are described. It is among the objectives of this paper to build a practical signpost for scientists and engineers in this rapidly evolving, cross-disciplinary field.

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Section: Dielectric Properties Of Fabrics-the Air-fiber-moisture Systemmentioning

confidence: 99%

Section: Dielectric Properties Of Fabrics-the Air-fiber-moisture Systemmentioning

confidence: 99%

Section: Dielectric Properties Of Fabrics-the Air-fiber-moisture Systemmentioning

confidence: 99%

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Dielectric Properties of Textile Materials: Analytical Approximations and Experimental Measurements—A Review

Mukai

2022

Textiles

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“…Sifat dielektrik pada material tekstil telah diamati sebagai bagian dari upaya untuk mengurangi fenomena listrik statis dalam industri tekstil (Morton & Hearle, 1993). Pada beberapa penelitian lainnya, sifat dielektrik tekstil digunakan untuk mengukur kadar air pada material tekstil [13,14], untuk mendeteksi variasi massa pada material benang dan sliver [15,16,17], untuk mengobservasi transmisi kelembapan dari material tekstil [16,17], serta untuk aplikasi kegunaan lainnya. Bahan tekstil seperti kain dan benang pada merupakan material yang tersusun atas serat.…”

Section: Pendahuluanunclassified

Pengukuran Permitivitas Dielektrik Bahan Kain Non Woven Menggunakan Kapasitansi Meter Arduino Uno Dan Prinsip Kerja Kapasitor Plat Sejajar

Wijayono

Putra

2020

J. Fis. Indones.

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Pada penelitian ini telah dilakukan penentuan konstanta permitivitas dielektrik bahan kain non woven secara eksperimen dengan menggunakan kapasitansi meter berbasis Arduino Uno dan prinsip kerja kapasitor plat sejajar. Penentuan konstanta permitivitas bahan kain non woven dilakukan dengan cara mengukur nilai kapasitansi yang divariasikan terhadap jarak antara plat yang berisi bahan dielektrik kain non woven. Pengukuran kapasitansi dilakukan dengan prinsip pengisian dan pengosongan kapasitor menggunakan perangkat mikrokontroler Arduino Uno. Proses pengisian dan pengosongan dilakukan dengan menggunakan susunan seri rangkaian resistor-kapasitor (RC) dengan tegangan sumber 5 Volt. Pada eksperimen ini telah digunakan sebuah plat sejajar dengan ukuran 29 × 30 cm sebagai elektroda kapasitor, serta sebuah perangkat resistor dengan ukuran 125 megaOhm. Hasil penelitian menunjukan bahwa perilaku pengisian dan pengosongan perangkat kapasitor plat-sejajar memiliki nilai R square > 0,9, yang menunjukan korelasi cukup baik antara hasil prediksi dan eksperimen pada pengukuran kapasitansi. Terdapat lima bahan dielektrik kain yang ditentukan dengan hasil dari yang terkecil sampai yang terbesar berturut-turut yaitu kain non woven polipropilen 31,44 gsm sebesar 1,0598, kain non woven polipropilen 43,72 gsm sebesar 1,0996, kain non woven polipropilen 52,31 gsm sebesar 1,1288, kain non woven polipropilen 74,12 gsm sebesar 1,1963, kain non woven polipropilen 80,87 gsm sebesar 1,2279. Telah ditemukan hubungan antara parameter gramasi (GSM) kain non woven polipropilen terhadap besaran nilai konstanta dielektrik terukur.

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“…This is due to the fact that it depends on factors such as the working frequency, temperature, moisture and packing density. 35 All of these factors need to be considered in the design and material selection in order to achieve good performance and stability against environmental variations.…”

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confidence: 99%

An investigation into the fabrication parameters of screen-printed capacitive sensors on e-textiles

Ferri

Llopis

Moreno

et al. 2020

Textile Research Journal

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The design and development of textile-based capacitive sensors requires the implementation of textile capacitors with a determined capacitance. One of the main techniques to obtain these sensors is the screen-printing of conductive and dielectric inks on textiles. This paper investigates the fabrication parameters that have the most influence when designing and implementing a screen-printed capacitive sensor. In this work, a textile has been used directly as the dielectric part, influencing sensitively the value of the permittivity and the thickness of the dielectric of the capacitor. These are two fundamental parameters for the estimation of its capacitance. The choice of the conductive ink, its viscosity and solid content, as well as printing parameters, such as printing direction, also impact on the manner for obtaining the electrodes of the capacitive sensor. Although the resulting electrodes do not represent an important parameter for the estimation of the capacitance, it determines the selection of fabrics that can be printed. As a result of the investigation, the paper provides a guideline to choose the materials, such as fabrics or inks, as well as the printing parameters, to implement e-textile applications based on projected capacitive technologies. The experiments carried out on different fabrics and inks have provided results with capacities of less than 60 pF, the limit where the sensors based on capacitive technologies are located.

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Dielectric properties in textile materials: a theoretical study

Cited by 11 publications

References 21 publications

Dielectric Properties of Textile Materials: Analytical Approximations and Experimental Measurements—A Review

Dielectric Properties of Textile Materials: Analytical Approximations and Experimental Measurements—A Review

Pengukuran Permitivitas Dielektrik Bahan Kain Non Woven Menggunakan Kapasitansi Meter Arduino Uno Dan Prinsip Kerja Kapasitor Plat Sejajar

An investigation into the fabrication parameters of screen-printed capacitive sensors on e-textiles

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