压电
材料科学
纳米纤维
静电纺丝
生物材料
纳米技术
极化
壳体(结构)
聚合物
相(物质)
芯(光纤)
复合材料
光电子学
化学
有机化学
电介质
铁电性
作者
Tong Li,Yongjiu Yuan,Long Gu,Jun Li,Yan Shao,Shancheng Yan,Yunhe Zhao,Corey Carlos,Yutao Dong,Hong Qian,Xiong Wang,Wenlong Wu,S. Wang,Zuankai Wang,Xudong Wang,Xudong Wang,Xudong Wang
出处
期刊:Science Advances
[American Association for the Advancement of Science (AAAS)]
日期:2024-07-19
卷期号:10 (29): eadn8706-eadn8706
被引量:45
标识
DOI:10.1126/sciadv.adn8706
摘要
Poly( l -lactic acid) (PLLA) is a widely used U.S. Food and Drug Administration–approved implantable biomaterial that also possesses strong piezoelectricity. However, the intrinsically low stability of its high-energy piezoelectric β phase and random domain orientations associated with current synthesis approaches remain a critical roadblock to practical applications. Here, we report an interfacial anchoring strategy for fabricating core/shell PLLA/glycine (Gly) nanofibers (NFs) by electrospinning, which show a high ratio of piezoelectric β phase and excellent orientation alignment. The self-assembled core/shell structure offers strong intermolecular interactions between the -OH groups on Gly and C=O groups on PLLA, which promotes the crystallization of oriented PLLA polymer chains and stabilizes the β phase structure. As-received core/shell NFs exhibit substantially enhanced piezoelectric performance and excellent stability. An all NF–based nonwoven fabric is fabricated and assembled as a flexible nanogenerator. The device offers excellent conformality to heavily wrinkled surfaces and thus can precisely detect complex physiological motions often found from biological organs.
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