Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.
Macromol Rapid Commun. 2024 Jul;45(13):e2400038. doi: 10.1002/marc.202400038. Epub 2024 May 7.
Self-oscillating gel systems exhibiting an expanded operating temperature and accompanying functional adaptability are showcased. The developed system contains nonthermoresponsive main-monomers, such as N,N-dimethylacrylamide (DMAAm) or 2-acrylamido-2-methylpropane sulfonic acid (AMPS) or acrylamide (AAm) or 3-(methacryloylamino)propyl trimethylammonium chloride (MAPTAC). The gels volumetrically self-oscillate within the range of the conventional (20.0 °C) and extended (27.0 and 36.5 °C) temperatures. Moreover, the gels successfully adapt to the environmental changes; they beat faster and smaller as the temperature increases. The period and amplitude are also controlled by tuning the amount of main-monomers and N-(3-aminopropyl) acrylamide. Furthermore, the record amplitude in the bulk gel system consisting of polymer strand and cross-linker at 36.5 °C is achieved (≈10.8%). The study shows new self-oscillation systems composed of unprecedented combinations of materials, giving the community a robust material-based insight for developing more life-like autonomous biomimetic soft robots with various operating temperatures and beyond.
展示了具有扩展工作温度和伴随功能适应性的自激胶体制备。所开发的体系包含非热响应性的主单体，如 N,N-二甲基丙烯酰胺（DMAAm）或 2-丙烯酰胺基-2-甲基丙磺酸（AMPS）或丙烯酰胺（AAm）或 3-（甲基丙烯酰氨基）丙基三甲基氯化铵（MAPTAC）。凝胶在常规（20.0°C）和扩展（27.0 和 36.5°C）温度范围内体积自激振荡。此外，凝胶成功适应环境变化；随着温度升高，它们的振动速度加快，幅度减小。通过调整主单体和 N-（3-氨丙基）丙烯酰胺的用量，还可以控制周期和幅度。此外，在由聚合物链和交联剂组成的 36.5°C 的块状凝胶体系中实现了创纪录的大振幅（≈10.8%）。该研究展示了由前所未有的材料组合组成的新型自激振荡体系，为开发具有各种工作温度的更逼真的自主仿生软机器人提供了基于材料的强大见解。
