In this research, a new type of conductive composite with high tensile strength, high elasticity, and cost competitiveness has been developed through solution mixing–spraying–rolling methods. Naturel rubber (NR) latex with chitin nanocrystals (ChNCs) as reinforcing filler and carbon black (CB) are thermally sprayed on glass substrate layer by layer, and then, spirally structured conductive composites are obtained by rolling the sheets. When the CB content is 4.44%, the conductivity of the NR/ChNCs-CB composite can reach 6.92 s/m. The tensile strength of 5% ChNCs reinforced conductive composites is 3.47 MPa, which is 3.1 times that of NR-CB composites without ChNCs. The strain sensor exhibits a high gauge factor (GF ≈ 5) and electrical conductivity stability in a small deformation range and still shows good stability and recoverability upon 25%, 50%, and 100% strain. The high-sensitivity strain sensors are further employed for monitoring human activities such as finger movements and pronunciation, which shows good reproducibility and reliability. This study provides a routine of preparing highly stretchable and multifunctional strain sensors based on inexpensive raw materials by a simple manner, which opens up new opportunities for the development of stretchable electronic devices.

中文翻译：

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基于碳黑，几丁质纳米晶体和天然橡胶的螺旋结构复合材料的高性能应变传感器

在这项研究中，通过溶液混合-喷涂-轧制方法开发了一种新型的具有高拉伸强度，高弹性和成本竞争力的导电复合材料。将几丁质纳米晶体（ChNCs）作为增强填料和炭黑（CB）的Naturel橡胶（NR）乳胶逐层热喷涂到玻璃基板上，然后通过滚动片材获得螺旋结构的导电复合材料。当CB含量为4.44％时，NR / ChNCs-CB复合材料的电导率可达到6.92 s / m。5％ChNCs增强导电复合材料的拉伸强度为3.47 MPa，是不具有ChNCs的NR-CB复合材料的3.1倍。应变传感器在较小的变形范围内具有较高的应变系数（GF≈5）和电导率稳定性，并且在25％时仍显示出良好的稳定性和可恢复性，50％和100％应变。高灵敏度应变传感器还用于监视人类活动，例如手指运动和发音，显示出良好的可重复性和可靠性。这项研究提供了一种以廉价的方式，以廉价的原材料为基础，制备高度可拉伸的多功能应变传感器的程序，这为可拉伸电子设备的开发开辟了新的机遇。