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  1. ساخت و شناسایی پارچه الکترونیکی بر پایه الیاف نانوسلولز

Fabrication and Characterization of Electronic Textiles Based on Nanocellulose

Taherkhani, Maedeh | 2025

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 58790 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Pircheraghi, Gholamreza; Mohammadpour, Raheleh
  7. Abstract:
  8. With the advancement of modern technologies and the growing use of wearable electronic devices, the demand for sustainable energy sources has become increasingly evident. Consequently, the development of energy-harvesting systems capable of capturing and converting small-scale, wasted environmental energies has gained significant importance. In this regard, triboelectric nanogenerators (TENGs), which operate by harvesting and converting mechanical energy from everyday human motions into electricity, have attracted considerable attention. This study focuses on the investigation and development of fiber‑based TENGs for wearable applications. The primary emphasis is on creating nanogenerators with high performance, excellent flexibility, and easy integration into garments and other wearable devices. In line with the growing interest in the use of natural polymers, cellulose nanofibers were extracted from two types of plant weeds, namely Lolium temulentum and Veronica persica, to serve as the triboelectric layer in this project. The extracted cellulose nanofibers were then composited with poly(vinyl alcohol) (PVA) at different weight ratios of 70:30, 50:50, and 30:70, and subsequently used to coat conductive stainless steel yarns. Furthermore, the prepared weft yarns were woven with two different warp materials—polypropylene and silicone rubber—and the properties of the resulting fabrics were compared. Ultimately, the optimal fabric, generating a current of 0.37μA and a voltage of 22.7V, was selected and employed as both a power generator and motion sensor. This fabric successfully detected various human body movements
  9. Keywords:
  10. Triboelectric Nanogenerator ; Motion Sensor ; Cellulose Nanofiber ; Wearable Electronics ; Smart Textiles ; Electronic Textiles

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