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A Liquid Crystal Elastomer-Based Unprecedented Two-Way Shape-Memory Aerogel
Advanced Science ( IF 14.3 ) Pub Date : 2021-09-26 , DOI: 10.1002/advs.202102674 Meng Wang 1 , Ying Song 1 , Hari Krishna Bisoyi 2 , Jian-Feng Yang 1 , Li Liu 1 , Hong Yang 1 , Quan Li 1, 2
Advanced Science ( IF 14.3 ) Pub Date : 2021-09-26 , DOI: 10.1002/advs.202102674 Meng Wang 1 , Ying Song 1 , Hari Krishna Bisoyi 2 , Jian-Feng Yang 1 , Li Liu 1 , Hong Yang 1 , Quan Li 1, 2
Affiliation
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With the advantage of reversible shape-morphing between two different permanent shapes under external stimuli, the two-way shape-memory aerogel is expected to become a preferred aerogel for developing practical applications in actuators, sensors, robotics, and more. Herein, the first two-way shape-memory liquid crystal elastomer (LCE)-based aerogel is prepared by an orthogonal heat and light curing strategy coupled with an intermediate mechanical stretching step. The differential scanning calorimetry, temperature-varied wide-angle X-ray scattering, and polarizing optical microscope results indicate that the aerogel possesses a liquid crystal phase and the insider mesogens are well-oriented along the stretching direction. In addition to having superior compressibility and excellent shape stability, this LCE-based aerogel can perform a reversible shape deformation during the heating/cooling cycles with a shrinkage ratio of 37%. The work, that is disclosed here, realizes a truly two-way shape-memory behavior rather than the one-way shape deformation of traditional polymer aerogel materials, and may promote potential applications of this novel LCE-based aerogel material in control devices, soft actuators, and beyond.
中文翻译：
基于液晶弹性体的前所未有的双向形状记忆气凝胶
凭借在外部刺激下两种不同永久形状之间可逆形状变形的优势，双向形状记忆气凝胶有望成为在执行器、传感器、机器人等领域开发实际应用的首选气凝胶。在此，第一个基于双向形状记忆液晶弹性体（LCE）的气凝胶是通过正交热和光固化策略与中间机械拉伸步骤相结合而制备的。差示扫描量热法、随温度变化的广角X射线散射和偏光显微镜结果表明，气凝胶具有液晶相，并且内部介晶沿拉伸方向良好取向。除了具有优异的可压缩性和优异的形状稳定性之外，这种基于LCE的气凝胶还可以在加热/冷却循环过程中进行可逆的形状变形，收缩率为37%。这里公开的这项工作实现了真正的双向形状记忆行为，而不是传统聚合物气凝胶材料的单向形状变形，并且可能促进这种新型基于LCE的气凝胶材料在控制设备、软体等方面的潜在应用。执行器等等。
更新日期：2021-11-17
中文翻译：
基于液晶弹性体的前所未有的双向形状记忆气凝胶
凭借在外部刺激下两种不同永久形状之间可逆形状变形的优势，双向形状记忆气凝胶有望成为在执行器、传感器、机器人等领域开发实际应用的首选气凝胶。在此，第一个基于双向形状记忆液晶弹性体（LCE）的气凝胶是通过正交热和光固化策略与中间机械拉伸步骤相结合而制备的。差示扫描量热法、随温度变化的广角X射线散射和偏光显微镜结果表明，气凝胶具有液晶相，并且内部介晶沿拉伸方向良好取向。除了具有优异的可压缩性和优异的形状稳定性之外，这种基于LCE的气凝胶还可以在加热/冷却循环过程中进行可逆的形状变形，收缩率为37%。这里公开的这项工作实现了真正的双向形状记忆行为，而不是传统聚合物气凝胶材料的单向形状变形，并且可能促进这种新型基于LCE的气凝胶材料在控制设备、软体等方面的潜在应用。执行器等等。
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