Yu Rufang, Zhu Chengyan, Wan Junmin, Li Yongqiang, Hong Xinghua
College of Textiles (International Silk Institute), Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, China.
Tongxiang Research Institute, Zhejiang Sci-Tech University, Tongxiang 314599, China.
Polymers (Basel). 2021 Jan 1;13(1):151. doi: 10.3390/polym13010151.
Graphene-based textile strain sensors were reviewed in terms of their preparation methods, performance, and applications with particular attention on its forming method, the key properties (sensitivity, stability, sensing range and response time), and comparisons. Staple fiber strain sensors, staple and filament strain sensors, nonwoven fabric strain sensors, woven fabric strain sensors and knitted fabric strain sensors were summarized, respectively. (i) In general, graphene-based textile strain sensors can be obtained in two ways. One method is to prepare conductive textiles through spinning and weaving techniques, and the graphene worked as conductive filler. The other method is to deposit graphene-based materials on the surface of textiles, the graphene served as conductive coatings and colorants. (ii) The gauge factor (GF) value of sensor refers to its mechanical and electromechanical properties, which are the key evaluation indicators. We found the absolute value of GF of graphene-based textile strain sensor could be roughly divided into two trends according to its structural changes. Firstly, in the recoverable deformation stage, GF usually decreased with the increase of strain. Secondly, in the unrecoverable deformation stage, GF usually increased with the increase of strain. (iii) The main challenge of graphene-based textile strain sensors was that their application capacity received limited studies. Most of current studies only discussed washability, seldomly involving the impact of other environmental factors, including friction, PH, etc. Based on these developments, this work was done to provide some merit to references and guidelines for the progress of future research on flexible and wearable electronics.
对基于石墨烯的纺织应变传感器的制备方法、性能和应用进行了综述，特别关注其形成方法、关键性能（灵敏度、稳定性、传感范围和响应时间）以及比较。分别总结了短纤维应变传感器、短纤维和长丝应变传感器、无纺布应变传感器、机织织物应变传感器和针织织物应变传感器。(i) 一般来说，基于石墨烯的纺织应变传感器可以通过两种方式获得。一种方法是通过纺丝和编织技术制备导电纺织品，石墨烯作为导电填料。另一种方法是将基于石墨烯的材料沉积在纺织品表面，石墨烯用作导电涂层和着色剂。(ii) 传感器的应变片系数 (GF) 值反映其机械和机电性能，是关键的评估指标。我们发现，基于石墨烯的纺织应变传感器的 GF 绝对值根据其结构变化大致可分为两种趋势。首先，在可恢复变形阶段，GF 通常随应变增加而降低。其次，在不可恢复变形阶段，GF 通常随应变增加而增加。(iii) 基于石墨烯的纺织应变传感器的主要挑战在于其应用能力的研究有限。目前的大多数研究只讨论了耐洗性，很少涉及其他环境因素的影响，包括摩擦、酸碱度等。基于这些进展，开展这项工作是为了为柔性和可穿戴电子产品未来研究的进展提供一些参考和指导。
