(Adv. Sci.) A Liquid Crystal Elastomer-Based Unprecedented Two-Way Shape-Memory Aerogel
作者：Wang, M.; Song, Y.; Bisoyi, H. K.; Yang, J.; Liu, L.; Yang, H.*; Li, Q.*
關(guān)鍵字：aerogel
論文來源：期刊
具體來源：Advanced Science, 2021, 8, 2102674.
發(fā)表時間：2021年
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.