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서울토토사이트 추천 일베교 융합과학기술토토사이트 추천 일베원 헬스케어융합학과에서 연구세미나를 아래와 같이 개최합니다.

- 일시: 2025. 6. 9.(월) 12시-13시
- 강연자: 박원철 교수(서울토토사이트 추천 일베교 융합과학기술토토사이트 추천 일베원 응용바이오공학과)
- 강연 주제:40교과과정Wearable and stretchable conductive polymer composites for strain sensors
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Wearable and stretchable conductive polymer composites play a key role in advanced strain sensors due to their flexibility, durability, and stable conductivity under strain. By incorporating conductive fillers like carbon nanotubes, graphene, or metallic nanowires into a polymer matrix, these composites adjust their electrical resistance in response to mechanical deformation. Applications of these strain sensors include monitoring human motion, detecting physiological signals, and integration in soft robotics.
Despite this progress, challenges persist in creating highly sensitive sensors that endure harsh environments and enable multidirectional monitoring. Here, a flexible, multifunctional, and wearable conductive nanofiber composite (WCNC) strain sensor with a simple fabrication process is introduced. The WCNC combines elastic thermoplastic polyurethane (TPU) with acid-modified carbon nanotubes (ACNTs), silver nanowires (AgNWs), and solidified polydimethylsiloxane (PDMS). These layers work together to enhance the conductivity, superhydrophobicity, and strain sensitivity of the TPU-based nanofibrous membrane. The WCNC (TPU/ACNTs/AgNWs/PDMS) shows low resistance (1.22 Ω/cm²), high conductivity (up to 3506.8 S/m), and excellent superhydrophobicity (contact angle of 153.04°) with a self-cleaning function. It also demonstrates remarkable sensitivity, with a gauge factor of nearly 1.36 × 10⁵ and a working strain range from 38% to 100%—a performance level unique in strain sensing. Thanks to these outstanding features, the WCNC strain sensor can accurately monitor diverse human body movements and capture multidirectional signals for highly precise results.
At present, flexible, stretchable, and wearable strain sensors show great potential in healthcare for their ability to instantly and accurately monitor human health and body movements, making them particularly beneficial for patients with joint injuries and movement disorders. Among these, strain sensors using traditional flexible polymers and polymer nanofibers doped with conductive nanofillers have gained attention due to their easy preparation and excellent performance. However, because many wearable sensors come into direct contact with skin, they can promote bacterial growth in a sweat-rich environment, potentially leading to skin issues.To address this, a multifunctional conductive nanofiber composite (M-CNC) strain sensor with reliable antibacterial properties has been developed. The M-CNC strain sensor uses thermoplastic polyurethane (TPU) nanofibers as a substrate, decorated with acid-modified carbon nanotubes (ACNTs) and in situ self-assembled silver nanoflowers (AgNFs), creating double-shell conductive networks. The M-CNC (TPU/ACNT/AgNF) achieves stable conductivity (up to 7.5 × 10⁵ S/m) and greatly enhanced sensing performance, with a gauge factor of 55,352 at a strain range of 42% to 100%. The outer AgNF shell remains stable even after 1,000 cyclic tests at 50% strain, and the AgNFs also provide strong antibacterial properties, effectively inhibiting the growth of Gram-negative Pseudomonas aeruginosa and Gram-positive Staphylococcus aureus.

- Zoom 링크: https://snu-ac-kr.zoom.us/j/83276652324?pwd=aL8ey1oCyVNUf9vIBz6h8Ej7FihyuN.1
*회의 ID: 832 7665 2324 / Zoom 회의 PW: 488671
*별도의 사전신청 없이 참여 가능합니다.

- 문의: 헬스케어융합학과 행정실(ddttww0830@snu.ac.kr / 031-787-8169)

- 헬스케어융합학과 홈페이지: https://hst.snu.ac.kr/category/board_3_GN_44WyCJtw_20201202131822/

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