Waterproof and Conductive Tough Fibers for Washable E-textile
- 주제(키워드) Electronic textile , Conductive tough fiber , Waterproofing , Washability , Capillary tube-assisted coating , Dry electrode , Physiological signal monitoring
- 발행기관 아주대학교 일반대학원
- 지도교수 박성준
- 발행년도 2025
- 학위수여년월 2025. 2
- 학위명 석사
- 학과 및 전공 일반대학원 지능형반도체공학과
- 실제URI http://www.dcollection.net/handler/ajou/000000034374
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Conductive fibers are essential for wearable electronics, especially in electronic textiles (e-textiles) used as skin-interfaced sensors and interconnects. Achieving sustainable e-textiles with integrated toughness, waterproofing, and washability remains a challenge. We present waterproof conductive tough fibers (CTFs) fabricated via a scalable, continuous capillary tube-assisted coating (CTAC) process. These fibers have a multilayer structure with a stretchable polyester-rayon core, an Ag flake– waterborne polyurethane (AF–WPU) composite middle layer, and an outer eutectic gallium-indium (EGaIn) shell for high conductivity. The CTFs demonstrate a conductivity of 6.42 kS/cm, mechanical toughness of 6.22 MPa, and 70% strain at break. With lengths exceeding 20 m, a native oxide layer on the EGaIn shell ensures waterproofing capability based on the IPX8 standard, maintaining reliable performance at depths of up to 1.5 m and retaining consistent performance after 24 days of water immersion. After 20 washing cycles, the CTFs exhibit a resistance change that is 100 times lower than that of AF-WPU-coated fibers, resulting in a conductivity exceeding 4.00 kS/cm, with the difference increasing dramatically as the number of cycles increases. As a proof-of-concept, they enable wireless power transfer and reliable monitoring of electrocardiogram and electromyogram signals, establishing a robust platform for sustainable e-textiles.
more목차
1. Background 1
1.1 Core fiber characteristics 1
1.2 Metal–polymer composite 2
1.3 Eutectic gallium-indium (EGaIn) shell 4
1.4 Coating method for conductive fiber fabrication 5
2. Introduction 8
2.1 Emergence of conductive fibers 8
2.2 Limitations of single-material approaches 8
2.3 Advancements in multilayer fiber architectures 9
2.4 Unresolved challenges in sustainable e-textile development 10
2.5 Introducing waterproof conductive tough fibers (CTFs) 11
3. Results and discussion 12
3.1 Continuous manufacturing of multilayered CTFs 12
3.2 Morphological, chemical, and mechanical analysis 13
3.3 Scalable production and environmental stability 15
3.4 Sustainable washing and versatile applications 16
4. Conclusions 18
5. Experimental Section 19
5.1 Preparation of inner and outer shell coating materials 19
5.2 Capillary tube-assisted coating (CTAC) method 19
5.3 Electrical and mechanical measurement 19
5.4 XPS measurements 19
5.5 Immersion Testing Procedure for CTFs According to IPX8 Standard 20
5.6 Submersion and washing procedures for CTFs in sewn textiles 20
5.7 Wireless power transmission test using CTFs 20
5.8 Impedance measurement 20
5.9 Physiological signal measurement with CTFs 21
6. References 47
