Force through transpiration: biomimetic nanomechanical actuation

通过蒸腾产生的力：仿生纳米机械驱动

• 批准号: 0556271
• 负责人: Khalil Najafi
• 金额: --
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-07-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0556271&HistoricalAwards=false
• 关键词: Force; through; transpiration; biomimetic; nanomechanical

Force through transpiration:biomimetic nanomechanical actuationThis work will develop a new class of bio-mimetic actuators which harness the energy in evaporating water to generate distributed forces across nano / microscale materials. Inspired by hygroscopic spore dispersal mechanisms in plants, the proposed mechanism would enable the infusion of common materials with distributed and programmable force generation. Specifically, we will: 1) design, fabricate and test a family of transpiration actuators with feature sizes ranging from 10-1000 nm, 2) develop a predictive model for the sub-micron scale interactions between water and elastomer, 3) employ the model to design and fabricate materials with embedded actuation which self-actuate and self-assemble into stable configurations by 'adding water'. As part of this last task, transient surface tension forces generated during evaporation will be used to shift the actuated materials between different stable shapes. Synthetic, distributed nano-actuation capable of scavenging energy from water to generate mN/mm2 force densities will also be demonstrated.

通过蒸腾作用产生的力：仿生纳米机械驱动这项工作将开发一种新型仿生驱动器，它利用蒸发水的能量在纳米/微尺度材料上产生分布式力。受植物吸湿孢子扩散机制的启发，所提出的机制将使普通材料的注入具有分布式和可编程的力产生。具体来说，我们将：1)设计、制造和测试一系列特征尺寸在10-1000纳米之间的蒸腾致动器；2)为水和弹性体之间的亚微米尺度相互作用开发一个预测模型；3)利用该模型设计和制造具有嵌入式致动器的材料，这些材料可以通过“加水”自驱动和自组装成稳定的结构。作为最后一项任务的一部分，蒸发过程中产生的瞬态表面张力将用于在不同的稳定形状之间移动被驱动材料。还将演示能够从水中清除能量以产生mN/mm2力密度的合成分布式纳米驱动。