期刊
ACS MATERIALS LETTERS
卷 4, 期 12, 页码 2459-2468出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsmaterialslett.2c00798
关键词
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资金
- National Natural Science Foundation of China [61822405, 62074111]
- Science & Technology Foundation of Shanghai [19JC1412402, 20JC1415600]
- Shanghai Social Development Science and Technology Project [20dz1201800]
- Beijing National Laboratory for Molecular Sciences [BNLMS201904]
- Shanghai Education Development Foundation
- Shanghai Municipal Education Commission [18SG20]
- Fundamental Research Funds for the Central Universities [22120220180]
This article reports on the preparation of a highly flexible pressure sensor based on a gradient PIL (poly(ionic liquid)) ionogel. The sensor exhibits an ultrabroad detection range of 10 Pa to 1 MPa and is able to monitor both low and high pressures during human body movements. This work provides a powerful strategy for the preparation of flexible gradient materials for wearable electronics with wide pressure detection range.
Recently, with the increasing demand for artificial skins and human bodily motion/physical signals monitoring, flexible pressure sensors with a wide detection range are urgently needed. Transparent and stretchable gels with ionic conductivities are considered to be ideal candidates for flexible pressure sensors. However, the gel-based pressure sensors usually show a relatively narrow detection range, which significantly limits their practical applications. Herein, we report an unprecedented bioinspired highly flexible modulus/conductivity-dual-gradient poly(ionic liquid) (PIL) ionogel, which is achieved by constructing three layers of PIL ionogels with different monomer concentrations via a layer-by-layer gelation method. The flexible pressure sensor based on the gradient PIL ionogel exhibits an ultrabroad detection range of 10 Pa-1 MPa. This wearable pressure sensor is highly stable in environments and able to monitor both the tiny pressures as low as 10-100 Pa and the high pressures up to 0.1-1 MPa during human body movements. This work provides a powerful strategy for the preparation of flexible gradient materials that are promising for wearable electronics with a wide pressure detection range.
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