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Tree Ring‑Inspired Fibrous Helix for uv shielding and warning Based on Photo‑electricity‑Acoustic Energy Conversion

Advanced Fiber Materials 2023年第2期5卷 681-693页

作者： Yan Wang Ziyi Guo Jie Xiong Jingchong Liu Yong Zhao Fengyun Guo Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province School of Textile Science and Engineering(International Silk Institute)Zhejiang Sci-Tech UniversityHangzhou 310018China Key Laboratory of Bioinspired Intelligent Interface Science and Technology Ministry of Education School of Chemistry Beihang UniversityBeijing 100191China Beijing Key Laboratory for Bioengineering and Sensing Technology Daxing Research InstituteSchool of Chemistry and Biological EngineeringUniversity of Science and Technology BeijingBeijing 100083China

Flexible wearable ultraviolet(uv)shielding,monitoring and warning devices have important applications in civil and mili-tary fields.However,most flexible wearable uv devices show unsatisfactory performance due to their poor stability and easy failure at large strains.Herein,inspired by tree rings,we engineered a hierarchical composite nanofibrous helix with an alternately stacked Archimedes spiral structure via a cost-effective strategy.Based on a photo-electricity-acoustic energy conversion system,we fabricated an all-in-one device exhibiting strain-insensitive uv protection at 0–500%strain for uv shielding as well as strain-sensitive uv monitoring at 500–1500%strain for uv early warning.Compared with previously reported common nanofibrous membrane devices,the as-prepared composite nanofibrous helix shows great advantages in terms of stability and uv protection,especially at large strains.Furthermore,the helix demonstrates multiple functions of wear resistance,antibacterial properties,biodegradation and knittability.This versatile strategy holds great promise for wearable electronics and multifunctional devices.

关键词： Electrospinning Nanofibrous helix Energy conversion uv shielding and warning Multifunction Flexible electronics

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