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一种具有大应变和超高能量密度的介电弹性体,用于快速移动的软机器人

Wenwen Feng¹, Lin Sun¹, Zhekai Jin¹

¹Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, 100084, Beijing, China.

Nature communications

|May 18, 2024

概括

研究人员为软机器人开发了先进的介电弹性体 (DE). 这些DE可以在低电场下实现高性能,从而实现更快,更高效的软机器人驱动.

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
聚合物科学聚合物科学

背景情况:

介电弹性体驱动器 (DEAs) 对软机器人至关重要,需要高的驱动应变和能量密度.
目前的DEA需要高电场 (>100 MV m−1) 由于低介电常数和介电弹性体 (DE) 的高刚性.

研究的目的:

设计一种具有增强介电性质和机械特性的新型介电弹性体 (DE).
为了实现在较低电场下运行的高性能DEA,用于软机器人应用.

主要方法:

将极性化基组纳入DE结构.
在DE设计中使用长基侧链聚合的纳米域.
描述了开发的DE的介电常数,模量,执行应变和能量密度.

主要成果:

经过修改的DE在46 MV m-1.1的低电场下实现了253%的最大面积应变.
在40 MV m-1下记录了225 J kg-1的超高特异能,明显超过了自然肌肉和最先进的DE.
使用这种DE的软机器人证明了20.6BLs-1.1的创纪录运行速度.

结论:

新的DE设计克服了传统DE的局限性,在减少的电场下提供高性能.
这一进步为更快,更节能,更高能力的软机器人系统铺平了道路.
开发的材料代表了先进软机器人的DEA技术的重大突破.

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