基于液晶弹性体的灵活电容传感器
Lvzhou Li1, Hongyu Bai2, Xu Dong1
1Institute of Technology for Carbon Neutralization, Yangzhou University, School of Mechanical Engineering, Yangzhou University, Yangzhou 225127, P. R. China.
Langmuir : the ACS journal of surfaces and colloids
|August 24, 2023
概括
研究人员为灵活的传感器开发了具有高介电常数的先进液晶弹性体 (LCE). 这些LCE使灵敏的温度和压力感应能够快速恢复,从而推进可穿戴技术.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 传感器技术 传感器技术
背景情况:
- 液晶弹性体 (LCE) 由于在外部场下的分子转换而表现出热可逆形状记忆.
- 在LCE中极性液晶分子的定向极化有助于高介电常数,对电容传感器来说是有前途的.
研究的目的:
- 为了研究RM257-LCE薄膜的高介电常数,用于灵活的电容传感器应用.
- 通过分子链操纵和键和金属离子的结合来增强LCE的介电性质.
主要方法:
- 改变LCE分子链的灵活性.
- 在LCE的主要链中引入键和金属离子.
- 使用工程LCE制造灵活的电容温度和压力传感器.
主要成果:
- 在LCE中实现了显著增强的相对介电常数62 (在100Hz),比PDMS高23倍.
- 在特定温度范围内的增强介电常数中证明了正温度系数.
- 设计了高度灵敏的灵活温度传感器和具有0-2MPa范围的灵活压力传感器.
- 在90°C时,压力传感器的电容恢复时间为0.8秒.
结论:
- 具有高介电常数的工程LCE适用于先进的灵活电容传感器.
- 开发的传感器具有出色的灵敏度,广泛的压力传感范围和快速响应.
- 这项研究为设计各种技术应用的新型灵活传感器提供了基础.
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