RSS-Feed abonnieren
DOI: 10.1055/a-1637-8678
Flexible Resistance-Type Strain Sensors toward Monitoring Finger Movements
This work was supported by the Earth Engineering Center, Columbia University and by the Center for Advanced Materials for Energy and Environment, Columbia University.
![](https://www.thieme-connect.de/media/synlett/202119/lookinside/thumbnails/st-2021-k0283-l_10-1055_a-1637-8678-1.jpg)
Abstract
Flexible strain sensors with superior flexibility and high sensitivity are critical to artificial intelligence, and it is favorable to develop highly sensitive strain sensors by simple and cost-effective methods. We have prepared carbon-nanotubes-enhanced thermal polyurethane nanocomposites with good mechanical and electrical properties for the fabrication of highly sensitive strain sensors. The nanomaterials were prepared through a simple but effective solvent-evaporation method, and cheap polyurethane was used as the main raw material. Only a small quantity of carbon nanotubes (mass content 5%) was doped into a polyurethane matrix with aim of enhancing the mechanical and electrical properties of the nanocomposite. The resulting flexible nanocomposite films show a highly sensitive resistance response under an external strain stimulus. Strain sensors based on these flexible composite films deliver excellent sensitivity and conformality under mechanical conditions, and can detect finger movements precisely at various bending angles.
Key words
nanocomposites - flexible films - strain sensors - polyurethanes - carbon nanotubes - electrical propertiesPublikationsverlauf
Eingereicht: 06. August 2021
Angenommen nach Revision: 04. September 2021
Accepted Manuscript online:
06. September 2021
Artikel online veröffentlicht:
24. September 2021
© 2021. Thieme. All rights reserved
Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany
-
References and Notes
- 1a Wang X, Gu Y, Xiong Z, Cui Z, Zhang T. Adv. Mater. (Weinheim, Ger.) 2014; 26: 1336
- 1b Ma Y, Liu N, Li L, Hu X, Zou Z, Wang J, Luo S, Gao Y. Nat. Commun. 2017; 8: 1207
- 1c Lu C, Chen X. Acc. Chem. Res. 2020; 53: 1468
- 2a Sun J.-Y, Keplinger C, Whitesides GM, Suo Z. Adv. Mater. (Weinheim, Ger.) 2014; 26: 7608
- 2b Wang Y, Chang Q, Zhan R, Xu K, Wang Y, Zhang X, Li B, Luo G, Xing M, Zhong W. J. Mater. Chem. A 2019; 7: 24814
- 2c Lu C, Chen X. J. Mater. Chem. A 2021; 9: 753
- 3 Liu N, Fang G, Wan J, Zhou H, Long H, Zhao X. J. Mater. Chem. 2011; 21: 18962
- 4 Lu C, Liao X, Fang D, Chen X. Nano Lett. 2021; 21: 5369
- 5 Yu G.-F, Yan X, Yu M, Jia M.-Y, Pan W, He X.-X, Han W.-P, Zhang Z.-M, Yu L.-M, Long Y.-Z. Nanoscale 2016; 8: 2944
- 6a Boutry CM, Kaizawa Y, Schroeder BC, Chortos A, Legrand A, Wang Z, Chang J, Fox P, Bao Z. Nat. Electronics 2018; 1: 314
- 6b Wang X, Liu Z, Zhang T. Small 2017; 13: 1602790
- 6c Lu C, Chen X. Chem. Phys. Lett. 2020; 755: 137814
- 7a Li T, Li Y, Zhang T. Acc. Chem. Res. 2019; 52: 288
- 7b Rathod VT, Mahapatra DR, Jain A, Gayathri A. Sens. Actuators, A 2010; 163: 164
- 7c Chen R, Xu X, Yu D, Xiao C, Liu M, Huang J, Mao T, Zheng C, Wang Z, Wu X. J. Mater. Chem. C 2018; 6: 11193
- 8a Wang A, Wang Y, Zhang B, Wan K, Zhu J, Xu J, Zhang C, Liu T. Chem. Eng. J. (Amsterdam, Neth.) 2021; 411: 128506
- 8b Gu Z, Xu Y, Chen L, Fang R, Rong Q, Jin X, Jiang L, Liu M. Macromol. Mater. Eng. 2018; 303: 1800339
- 8c Lu C, Chen X. Nano Lett. 2020; 20: 1907
- 9 Xiang C, Cox PJ, Kukovecz A, Genorio B, Hashim DP, Yan Z, Peng Z, Hwang C.-C, Ruan G, Samuel EL. G, Sudeep PM, Konya Z, Vajtai R, Ajayan PM, Tour JM. ACS Nano 2013; 7: 10380
- 10 Liao H, Guo X, Wan P, Yu G. Adv. Funct. Mater. 2019; 29: 1904507
- 11 Preparation of TPU Films and TPU/CNTs Films and Strain Sensors TPU (1 g; Hufen Thermoplastic Polyurethane Co., Ltd.) was dissolved in DMSO (20 mL) with stirring for 2 h. CNTs (50 mg; Sinopharm Chemical Reagent Co., Ltd.) were added to the solution with ultrasonication for 1 h. The mixture was then cast into a mold at 50 °C for 4 h, then vacuum dried overnight. The composite film was then peeled off the mold. A pristine TPU film was similarly prepared without addition of the CNTs. Strain sensors were prepared by attaching a platinum collector at each end of the TPU/CNTs composite film.