基于光-热效应的水凝胶驱动器研制及应用

Development and Application of Hydrogel Actuators Based on the Light-Heat Effect

摘要

本研究成功制备了PAMPS/PNIPAM-GO双层水凝胶驱动器，并系统分析了其微观结构、溶胀性能、温度响应弯曲行为及力学特性。SEM表征显示，GO的引入使凝胶孔径减小、孔洞增多，形成更为致密的三维多孔结构。实验结果表明，PAMPS/PNIPAM-GO水凝胶表现出良好的溶胀性能，双层水凝胶的弯曲角度可达180°，并成功实现了对约1g木棍的稳定夹持与提起，展示了优异的温度响应致动能力。力学性能测试显示，加入30mg GO后，水凝胶的最大应力从98 kPa提升至358.1 kPa，最大拉伸位移从6.1 mm增加至9.337 mm，力学性能显著增强。本研究为开发快速响应、高力学强度的柔性光-热驱动器提供了实验依据，有望推动水凝胶材料在软体机器人、智能夹持及生物医疗等领域的应用。

Abstract

In this study, a bilayer hydrogel actuator of PAMPS/PNIPAM-GO was successfully fabricated, and its microstructure, swelling performance, temperature-responsive bending behavior, and mechanical properties were systematically analyzed. SEM characterization revealed that the introduction of GO reduced the gel pore size and increased the number of pores, forming a more compact three-dimensional porous structure. Experimental results showed that the PAMPS/PNIPAM-GO hydrogel exhibited excellent swelling performance, with the bending angle of the bilayer hydrogel reaching approximately 180°, and it successfully achieved stable grasping and lifting of a wooden stick weighing about 1g, demonstrating outstanding temperature-responsive actuation ability. Mechanical property tests indicated that after adding 30mg of GO, the maximum stress of the hydrogel increased from 98 kPa to 358.1 kPa, and the maximum tensile displacement increased from 6.1 mm to 9.337 mm, significantly enhancing the mechanical properties. This study provides experimental evidence for the development of fast-response, high-mechanical-strength flexible light-heat actuators and is expected to promote the application of hydrogel materials in soft robotics, intelligent grasping, and biomedical fields.

关键词

双层水凝胶 / 氧化石墨烯 / 力学性能 / 光驱动

Key words

bilayer hydrogel / graphene oxide / mechanical properties / light-driven

参考文献

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基金资助

北京市大学生科研与创业行动计划项目(X202610011024)