具有可交换硼酸酯键的可再编程液晶弹性体的三维打印技术

IF 5.4 1区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY GIANT Pub Date : 2024-07-31 DOI:10.1016/j.giant.2024.100331
Xinzi Yu , Changyue Liu , Liqian Wang , Tianyu Li , Lingxin Yuan , Jiping Yang , Rui Xiao , Zhijian Wang
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引用次数: 0

摘要

液晶弹性体(LCE)是一种具有较大可逆形变能力的软执行材料,可作为 "马达 "产生复杂形变,驱动软机器人运动。LCE 的变形取决于整体结构的三维(3D)形状和介质的排列模式。人们采用了各种方法来制造具有所需形状和中原排列的 LCE 结构。然而,传统的三维打印 LCE 需要持续输入热能以保持其驱动形状。LCE 固化后无法进行再加工和再编程。在此,我们在油墨中引入了动态硼酸酯键,这样打印出的 LCE 结构就能从多域状态重新编程为单域状态,反之亦然。我们进一步探讨了印刷参数和动态共价键含量对致动性能和重编程能力的影响。用有限元方法可以很好地预测驱动形状。本文开发的动态可印刷 LCE 为 LCE 结构提供了新的策略和广阔的设计空间。
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3D printing of reprogrammable liquid crystal elastomers with exchangeable boronic ester bonds

Liquid crystal elastomers (LCEs) are a kind of soft actuating materials with large reversible deformation ability, which can work as the “motor” to exhibit complex deformations and drive the locomotion of soft robots. The deformation of LCEs depends on the three-dimensional (3D) shape of whole structure and alignment patterns of mesogens. Various methods have been employed to fabricate the LCE structure with desired shapes and mesogen alignments. However, conventional 3D printed LCEs require continuous thermal energy input to maintain their actuated shapes. The LCEs cannot be reprocessed and reprogrammed once cured. Herein, we introduce dynamic boronic ester bonds into the ink, with which the printed LCE structures are capable of being reprogrammed from polydomain into monodomain state and vice versa. We further explore the effects of printing parameters and content of dynamic covalent bonds on the actuation performance and reprogramming ability. The actuated shape could be well predicted with finite element method. The dynamic printable LCEs developed here offer new strategy and large design space for LCE structures.

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来源期刊
GIANT
GIANT Multiple-
CiteScore
8.50
自引率
8.60%
发文量
46
审稿时长
42 days
期刊介绍: Giant is an interdisciplinary title focusing on fundamental and applied macromolecular science spanning all chemistry, physics, biology, and materials aspects of the field in the broadest sense. Key areas covered include macromolecular chemistry, supramolecular assembly, multiscale and multifunctional materials, organic-inorganic hybrid materials, biophysics, biomimetics and surface science. Core topics range from developments in synthesis, characterisation and assembly towards creating uniformly sized precision macromolecules with tailored properties, to the design and assembly of nanostructured materials in multiple dimensions, and further to the study of smart or living designer materials with tuneable multiscale properties.
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