Self-powered wearable human-computer interaction system based on kapok cellulose nanofibers

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2024-05, Vol.488, p.151059, Article 151059
• Main Authors: Shi, Yating, Lin, Changmei, Deng, Peiwei, Cao, Leo N.Y., Wang, Weiguo, Li, Wanjing, Lin, Hezhi, Yang, Yun, Wang, Hao, Ye, Meidan, Xu, Zijie, Cao, Shilin, Guo, Wenxi
• Format: Article
• Language: English
• Subjects: Flexible wearable electronic devices; Kapok cellulose nanofiber film; Self-powered tactile sensing; Triboelectric nanogenerator
• ISSN: 1385-8947; 1873-3212
• DOI: 10.1016/j.cej.2024.151059

Figure C1 KCNF-TENG builds multi-channel, fast-response self-powered wearable sensing systems for human–computer interaction and control hardware. [Display omitted] •kapok cellulose nanofiber film (KCNF) with superior optical, mechanical and biological properties was prepared.•The KCNF dielectric enhancement formed after mechanical treatment significantly improves the electrical output performance of TENG devices.•Self-powered human–computer interaction systems, e.g., five-finger input, smart medicine, and intelligent games, were established. As wearable devices in the fields of medical health, human–computer interaction, and motion detection continue to diversify in their materials and forms, they show vast application potential. Cellulose materials are emerging as prominent materials for fabricating flexible wearable electronic devices because of their favorable skin compatibility, cost-effectiveness, and abundance. However, there is little research on the use of kapok cellulose in wearable electronics. This study addresses this knowledge gap by exploring the high-yield production and waste recycling potential of kapok cellulose. To overcome the limitations of conventional cellulose films, such as poor flexibility, high haze, and limited light transmittance, a kapok cellulose nanofiber film (KCNF) with a transparency of > 90 % and a tensile strain of > 20 % is prepared. The use of the KCNF as a friction electric material in the triboelectric nanogenerator (TENG) improves its electrical output performance by 228 % and permits its comfortable long-term attachment to the skin for self-powered tactile sensing applications, including game control, text input, and smart medical devices. This study demonstrates that the exploration of KCNF materials expands the options available for developing wearable electronic devices with numerous potential applications.