Liu Yongjiao, Sun Ning, Duan Jingzhong, Liu Xiaoxuan, Dong Jinfeng, Wang Tian, Long Xiaojing, Nie Zhaoguang, Wang Bingbing, Xia Yanzhi
College of Chemistry and Chemical Engineering, State Key Laboratory of Bio-fibers and Eco-textiles, College of materials science and engineering, Shandong Collaborative Innovation Center of Marine Bio-based Fibers and Ecological Textiles, Qingdao University, Qingdao 266071, PR China.
Longkou Conor Glass Science and Technology Co., Ltd, Yantai 265716, PR China.
Int J Biol Macromol. 2025 Mar;296:139680. doi: 10.1016/j.ijbiomac.2025.139680. Epub 2025 Jan 8.
In this experiment, we studied a technique that permits the continuous fabrication of electrochromic alginate fibers because there hasn't been much research on electrochromic alginate fibers. Therefore, it's important to investigate ways to increase the application areas of alginate fibers. AgNP‑calcium alginate fibers with high electrical conductivity were prepared by Ag substitution method. Electrochromic alginate fibers were successfully prepared by sequentially coating the fibers with PEDOT:PSS, WO, and PVDF:HFP to form a WO/PEDOT:PSS composite color-changing layer and a PVDF:HFP stable electrolyte layer. Fifty electrochromic alginate fibers with a length of 7 cm were tested, and their resistance values ranged from 2 to 12 Ω, of which 78 % were between 3 and 8 Ω, providing excellent electrical conductivity. In the electrolyte from 0.1 V to -0.7 V, the color of the fiber changes from the original state to the colored state in only 5 s. Ten minutes after the voltage is disconnected, the color changes to the original color of the AgNP-Calcium Alginate fibers and the color change are reversible. The solid fibers can change from light blue to dark blue and the color change is uniform in the upright and bent state. This study lays a solid research foundation for the industrial production and intelligent application of electrochromic alginate fibers.
在本实验中，我们研究了一种可连续制造电致变色藻酸盐纤维的技术，因为此前对电致变色藻酸盐纤维的研究较少。因此，研究增加藻酸盐纤维应用领域的方法很重要。通过银置换法制备了具有高电导率的AgNP-海藻酸钙纤维。通过依次在纤维上涂覆PEDOT:PSS、WO和PVDF:HFP，成功制备了电致变色藻酸盐纤维，形成了WO/PEDOT:PSS复合变色层和PVDF:HFP稳定电解质层。对50根长度为7厘米的电致变色藻酸盐纤维进行了测试，其电阻值在2至12Ω之间，其中78%在3至8Ω之间，具有优异的导电性。在0.1V至-0.7V的电解质中，纤维颜色仅需5秒就从原始状态变为显色状态。断开电压10分钟后，颜色变回AgNP-海藻酸钙纤维的原始颜色，且颜色变化是可逆的。固体纤维可从浅蓝色变为深蓝色，且在直立和弯曲状态下颜色变化均匀。本研究为电致变色藻酸盐纤维的工业化生产和智能应用奠定了坚实的研究基础。
