在低电场下具有超高功率密度的高响应频率双模网络聚烯酸弹性体
Li-Juan Yin1, Boyuan Du2, Hui-Yi Hu1
1State Key Laboratory of Power System Operation and Control, Department of Electrical Engineering, Tsinghua University, Beijing, China.
Nature communications
|November 13, 2024
概括
我们开发了一种新的双模网络聚烯酸介电弹性体,可以为软机器人实现超高功率密度. 这种材料能够在低电场下快速移动和高效工作,超越了以前的限制.
科学领域:
- 材料科学 材料科学 材料科学
- 机器人技术 机器人技术 机器人技术
- 聚合物化学 聚合物化学
背景情况:
- 介电弹性体对于软机器人执行器至关重要,但通常具有低功率密度.
- 聚烯酸乙烯弹性体受到低响应频率的限制,阻碍了快速运动.
- 在低电场下实现高功率密度对于实用的软机器人技术至关重要.
研究的目的:
- 开发一种具有高功率密度和广泛驱动频率带宽的聚烯酸介电弹性体.
- 为了克服弹性体中介电和机械性能之间的内在合.
- 为了使低电场软执行器具有快速和高效的操作.
主要方法:
- 制造双模网络聚烯酸介电弹性体.
- 介电常数,扬模和频率响应的表征.
- 开发和测试使用新弹性质的旋转电机.
主要成果:
- 双模网络弹性体表现出高介电常数,低扬模和宽频带宽 (~200 Hz).
- 在20 MV m-1和200 Hz下达到154 W kg-1的超高功率密度,比10 Hz增加了75倍.
- 开发了一种可达到1245rpm的旋转电机,其转速为19.6 MVm-1和125Hz,与基于的电机相美.
结论:
- 双模网络策略有效地打破了聚烯酸弹性质中的介电机械性质合.
- 这种新材料为适用于低电场软执行器的高功率密度介电弹性体提供了一种多功能方法.
- 这些发现为先进的软机器人铺平了道路,提高了速度和效率.
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