Research progress on preparation methods of yarn based flexible strain sensors
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摘要: 纱线基柔性应变传感器作为一维传感器具有较好的柔韧性、可编织特性以及可拉伸性能,使得其在人体运动监测方面有很大的应用优势。纱线基柔性应变传感器的制备方法主要包括纺丝法、纺纱法、后整理以及复合方法,以其制备方法为切入点阐述了各类纱线基柔性应变传感器的制备过程及研究进展,并归纳了各类制备方法的特征和优缺点,最后提出了纱线基柔性应变传感器的未来研究方向,为进一步制备和研究该类传感器提供参考。Abstract: As a one-dimensional sensor, yarn-based flexible strain sensor has good flexibility, braidability and stretchability, which makes it have great application advantages in human motion monitoring. The preparation methods of yarn-based flexible strain sensors mainly include filature method, spinning method, finishing method and composite method, and the preparation process and research progress of various yarn-based flexible strain sensors are expounded from the preparation method, and the characteristics, advantages and disadvantages of various preparation methods are summarized, and finally the future research direction of yarn-based flexible strain sensors is proposed, which provides a reference for further preparation and research of such sensors.
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Key words:
- yarn-based /
- strain sensor /
- wearable electronic devices /
- sensing performance /
- preparation method
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图 4 CNTS/TPU芯鞘纤维的制备。CNTs/TPU皮芯纤维同轴湿法纺丝工艺图(a)及基于微裂纹的皮芯纤维以及TPU和CNT在微裂纹结构处的分布示意图(b)及光纤传感器微裂纹结构形成示意图(c)[42]
Figure 4. Preparation of CNTS/TPU core sheath fibers. Schematic diagram of coaxial wet spinning process of CNTs/TPU core fibers (a), schematic diagram of the distribution of microcrack-based cortex fibers, TPU and CNT at microcrack structure (b) and microcrack structure formation of optical fiber sensor (c)[42]
表 1 纱线基柔性应变传感器制备方法及其优缺点
Table 1. Preparation methods for Yarn-based flexible strain sensors and their advantage and disadvantage
Preparation of yarn-based sensors Preparation characteristics Advantages Disadvantages Melt spinning A conductive substance is added to the spinning stock solution to spin and form, and it is cured into silk in hot air The spinning speed is faster and it is easy to achieve industrial production There is limitations in the volume fraction of the filler, which damages the mechanical properties Wet spinning The conductive substance is added to the spinning stock solution to spin and mold, and the silk is cured into silk in a coagulation bath The conductive material is more evenly dispersed, the fiber fineness is more consistent, and a special leather core structure can be spun The spinning speed is low and the cost is high Electrospinning Polymers or melts are mixed with conductive substances and spun
directly in a strong electric fieldStrong spinnability, strong designability, low production cost Low production efficiency Spinning Using traditional spinning technology, conductive materials are combined
with flexible materialsThe operation is simple and the equipment is mature It is often necessary to combine with other preparation techniques Coating method Conductive materials are coated on the yarn matrix The preparation process is simple and fast The coating is easy to peel off Impregnation method Immersing the yarn in a solution containing a conductive substance for
a certain period of time, so that the conductive substance is deposited on the yarnThe conductive material is well combined with the flexible matrix The conductive layer is prone to detachment Composite method Yarn-based flexible strain sensors are produced by combining two or more preparation methods The operation is more complicated The shortcomings of a single approach can be improved -
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