摘要
Liquid metal(LM) has shown potential values in different areas. Attempts to implement LM are tending to develop new functions and make it versatile to improve its performance for practical applications.Here, we present an unprecedented LM-integrated ultra-elastic microfiber with distinctive features for wearable electronics. The microfiber with a polyurethane shell and an LM core was continuously generated by using a sequenced microfluidic spinning and injection method. Due to the precise fluid manipulation of microfluidics, the resultant microfiber could be tailored with tunable morphologies and responsive conductivities. We have demonstrated that the microfiber could act as dynamic force sensor and motion indicator when it was embedded into elastic films. In addition, the values of the LMintegrated ultra-elastic microfiber on energy conversions such as electro-magnetic or electro-thermal conversions have also been realized. These features indicate that LM-integrated microfiber will open up new frontiers in LM-integrated materials and the wearable electronics field.
液体金属作为室温下呈现出液态的金属是推动未来发展的新材料.目前已有不少研究基于液体金属开发具有新功能的材料、设备和器件,并不断优化它们在实际应用中的性能.本文提出了集成液体金属的超弹纤维,其展现出独特的性质,并有望被应用于可穿戴电子设备.利用程式化微流控纺丝和灌注技术,可以连续地制备具有超弹聚氨酯外壳和液体金属内核的纤维材料.微流控技术能够对微量的液体进行方便又精确的控制,该方法制备的纤维材料具有可调节的结构形貌,并具备不同的导电能力.将制备所得纤维进一步集成到弹性薄膜中,所构成的复合薄膜材料由于发生形变而表现出电阻的变化,因此能够用于压力传感器和运动指示器.此外,利用液体金属卓越的性质,能够实现电磁和电热等不同形式能量的转换.所制备的集成液体金属的超弹纤维为可穿戴电子设备、液体金属集成材料的研究开辟了新思路.
作者
Yunru Yu
Jiahui Guo
Biao Ma
Dagan Zhang
Yuanjin Zhao
余筠如;郭佳慧;马标;张大淦;赵远锦(Department of Rheumatology and Immunology,the Affiliated Drum Tower Hospital of Nanjing University Medical School,Nanjing 210008,China;Department of Clinical Laboratory.Nanjing Drum Tower Hospital,Clinical College of Xuzhou Medical University,Nanjing 210008,China;State Key Laboratory of Bioelectronics,School of Biological Science and Medical Engineering,Southeast University,Nanjing 210096,China)
基金
supported by the National Natural Science Foundation of China (61927805)
the Natural Science Foundation of Jiangsu (BE2018707)
the Scientific Research Foundation of Nanjing University
the Scientific Research Foundation of Drum Tower Hospital。
