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Significant Stretchability Enhancement of a Crack-Based Strain Sensor Combined with High Sensitivity and Superior Durability for Motion Monitoring.
ACS Appl Mater Interfaces 2019; 11(7):7405-7414AA

Abstract

Flexible strain sensors have attracted tremendous interest due to their potential application as intelligent wearable sensing devices. Among them, crack-based flexible strain sensors have been studied extensively owing to their ultrahigh sensitivity. Nevertheless, the detection range of a crack-based sensor is quite narrow, limiting its application. In this work, a stretchable strain sensor based on a designed crack structure was fabricated by spray-coating carbon nanotube (CNT) ink onto an electrospun thermoplastic polyurethane (TPU) fibrous mat and prestretching treatment to overcome the trade-off relationship. Our sensor exhibited combined features of high sensitivity in a greatly widened workable sensing range [a gauge factor of 428.5 within 100% strain, 9268.8 for a strain of 100-220%, and larger than 83982.8 for a strain of 220-300%], a fast response time (about 70 ms), superior durability (>10 000 stretching-releasing cycles), and excellent response toward bending. The microstructural evolution of CNT branches extending from two edges of the cracks and the excellent stretchability of TPU fibrous mats are mainly related to the remarkable sensing properties. Our sensor is then assembled to detect various human motions and physical vibrational signals, demonstrating its potential applications in intelligent devices, electronic skins, and wearable healthcare monitors.

Authors+Show Affiliations

School of Materials Science and Engineering , Zhengzhou University , Zhengzhou 450001 , China.School of Materials Science and Engineering , Zhengzhou University , Zhengzhou 450001 , China.School of Materials Science and Engineering , Zhengzhou University , Zhengzhou 450001 , China.School of Materials Science and Engineering , Zhengzhou University , Zhengzhou 450001 , China.School of Materials Science and Engineering , Zhengzhou University , Zhengzhou 450001 , China.Center for Advanced Materials Research, School of Materials and Chemical Engineering , Zhongyuan University of Technology , Zhengzhou 450007 , China.School of Materials Science and Engineering , Zhengzhou University , Zhengzhou 450001 , China.School of Materials Science and Engineering , Zhengzhou University , Zhengzhou 450001 , China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30698944

Citation

Zhou, Yujie, et al. "Significant Stretchability Enhancement of a Crack-Based Strain Sensor Combined With High Sensitivity and Superior Durability for Motion Monitoring." ACS Applied Materials & Interfaces, vol. 11, no. 7, 2019, pp. 7405-7414.
Zhou Y, Zhan P, Ren M, et al. Significant Stretchability Enhancement of a Crack-Based Strain Sensor Combined with High Sensitivity and Superior Durability for Motion Monitoring. ACS Appl Mater Interfaces. 2019;11(7):7405-7414.
Zhou, Y., Zhan, P., Ren, M., Zheng, G., Dai, K., Mi, L., ... Shen, C. (2019). Significant Stretchability Enhancement of a Crack-Based Strain Sensor Combined with High Sensitivity and Superior Durability for Motion Monitoring. ACS Applied Materials & Interfaces, 11(7), pp. 7405-7414. doi:10.1021/acsami.8b20768.
Zhou Y, et al. Significant Stretchability Enhancement of a Crack-Based Strain Sensor Combined With High Sensitivity and Superior Durability for Motion Monitoring. ACS Appl Mater Interfaces. 2019 Feb 20;11(7):7405-7414. PubMed PMID: 30698944.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Significant Stretchability Enhancement of a Crack-Based Strain Sensor Combined with High Sensitivity and Superior Durability for Motion Monitoring. AU - Zhou,Yujie, AU - Zhan,Pengfei, AU - Ren,Miaoning, AU - Zheng,Guoqiang, AU - Dai,Kun, AU - Mi,Liwei, AU - Liu,Chuntai, AU - Shen,Changyu, Y1 - 2019/02/08/ PY - 2019/1/31/pubmed PY - 2019/1/31/medline PY - 2019/1/31/entrez KW - carbon nanotube KW - crack KW - electrospun fibrous mat KW - flexible strain sensor KW - ultrastretchable SP - 7405 EP - 7414 JF - ACS applied materials & interfaces JO - ACS Appl Mater Interfaces VL - 11 IS - 7 N2 - Flexible strain sensors have attracted tremendous interest due to their potential application as intelligent wearable sensing devices. Among them, crack-based flexible strain sensors have been studied extensively owing to their ultrahigh sensitivity. Nevertheless, the detection range of a crack-based sensor is quite narrow, limiting its application. In this work, a stretchable strain sensor based on a designed crack structure was fabricated by spray-coating carbon nanotube (CNT) ink onto an electrospun thermoplastic polyurethane (TPU) fibrous mat and prestretching treatment to overcome the trade-off relationship. Our sensor exhibited combined features of high sensitivity in a greatly widened workable sensing range [a gauge factor of 428.5 within 100% strain, 9268.8 for a strain of 100-220%, and larger than 83982.8 for a strain of 220-300%], a fast response time (about 70 ms), superior durability (>10 000 stretching-releasing cycles), and excellent response toward bending. The microstructural evolution of CNT branches extending from two edges of the cracks and the excellent stretchability of TPU fibrous mats are mainly related to the remarkable sensing properties. Our sensor is then assembled to detect various human motions and physical vibrational signals, demonstrating its potential applications in intelligent devices, electronic skins, and wearable healthcare monitors. SN - 1944-8252 UR - https://www.unboundmedicine.com/medline/citation/30698944/Significant_Stretchability_Enhancement_of_a_Crack_Based_Strain_Sensor_Combined_with_High_Sensitivity_and_Superior_Durability_for_Motion_Monitoring_ L2 - https://dx.doi.org/10.1021/acsami.8b20768 DB - PRIME DP - Unbound Medicine ER -