Design of Surface-Aligned Main-Chain Liquid-Crystal Networks Prepared under Ambient, Light-Free Conditions Using the Diels–Alder Cycloaddition
Design of Surface-Aligned Main-Chain Liquid-Crystal Networks Prepared under Ambient, Light-Free Conditions Using the Diels–Alder Cycloaddition
复制标题
使用 Diels-Alder 环加成法在环境、无光条件下制备表面对准主链液晶网络的设计
DOI：
10.1021/acsmacrolett.2c00616
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发表时间：
2023
影响因子：
7.015
通讯作者：
Read de Alaniz, Javier
中科院分区：
文献类型：
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作者：
Park, Minwook;Stricker, Friedrich;Campos, Jesus Guillen;Clark, Kyle D.;Lee, Jaejun;Kwon, Younghoon;Valentine, Megan T.;Read de Alaniz, Javier
表面对准液晶网络（LCN）为开发能够执行一系列任务的功能材料提供了解决方案，包括驱动、形状记忆和表面图案化。在这里，我们展示了狄尔斯-阿尔德环加成反应可用于在温和的环境条件下制备平面排列的 LCN 的主链，而无需添加添加剂或紫外线照射。该网络的机械性能具有强大的粘弹性模量和刚度，并且在物理老化时具有可逆的局部自由体积变化。这项研究展示了基于无添加剂逐步增长狄尔斯-阿尔德聚合设计表面取向 LCN 的新机会，并有可能将更广泛的光致变色材料纳入 LCN 中。
Surface-aligned liquid-crystal networks (LCNs) offer a solution for developing functional materials capable of performing a range of tasks, including actuation, shape memory, and surfaces patterning. Here we show that Diels–Alder cycloaddition can be used to prepare the backbone of planar aligned LCNs under mild ambient conditions without the addition of additives or UV irradiation. The mechanical properties of the networks have robust viscoelastic modulus and stiffness with a reversible local free volume change upon physical aging. This study shows new opportunities to design surface-aligned LCNs based on additive free step-growth Diels–Alder polymerization and enables the potential to incorporate a wider range of photochromic materials into LCNs.