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Updated: Jun 2, 2025

Free-form Light Actuators — Fabrication and Control of Actuation in Microscopic Scale

Free-form Light Actuators — Fabrication and Control of Actuation in Microscopic Scale

Published on: May 25, 2016

在印刷液晶弹性体中进行空间编程的对齐和启动.

Rodrigo Telles¹, Arda Kotikian¹, Guillaume Freychet²

¹John A. Paulson School of Engineering and Applied Sciences and Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138.

Proceedings of the National Academy of Sciences of the United States of America

|January 15, 2025

概括

液晶弹性体 (LCE) 可以通过3D打印,并具有可控的形状变形功能. 优化喷嘴几何和打印参数,如怀森堡数 (Wi),确保统一的导演对齐,以提高性能.

关键词:

通过3D打印打印3D打印.在操作中的X射线散射.液晶弹性体的液晶弹性体.

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Published on: May 25, 2016

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科学领域:

材料科学材料科学材料科学
聚合物科学聚合物科学
软物质物理学软物质物理学

背景情况:

液晶弹性体 (LCEs) 具有独特的形状变形特性,由其从阴性到同位素的过渡驱动.
3D打印LCE为工程师提供了一条复杂的,功能性的材料的途径.
在打印过程中控制阴性导体的调整对于实现所需的材料特性至关重要.

研究的目的:

为了研究墨水组成,喷嘴几何和打印参数对3D打印LCEs内马特导体对齐的影响.
确定威森伯格数 (Wi) 作为预测导演对齐的关键参数.
探索在LCE架构中实现空间控制的形状变形过渡的方法.

主要方法:

风病学测量以确定墨水流动行为并计算韦森伯格数 (Wi).
3D打印实验使用形和高压喷嘴来评估导向对齐.
COMSOL模拟和操作中的X射线测量以分析导体对齐和流场.
不同的打印参数,包括流量,在打印过程中操纵Wi.

主要成果:

森伯格数 (Wi) 有效地预测了3D打印过程中的LCE导体对齐.
导向对齐在Wi < 1的圆喷嘴中是辐射不均的,而Wi ≫ 1的均.
过高的喷嘴产生更均的导向对齐相比,缩的喷嘴在相当的Wi.
使用高压喷嘴打印显著提高了LCE的刚性和驱动应变.
在打印过程中Wi的动态调整可以创建具有局部编码的形状变形行为的LCE.

结论:

喷嘴几何和打印条件,特别是韦森伯格数,对于控制3D打印LCE中的导向对齐至关重要.
超标喷嘴设计为导演对齐提供了更好的控制,从而改善了材料性能.
动态控制Wi的能力为制造具有定制功能的复杂LCE结构开辟了新的可能性.