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From Sea Cucumbers to Soft Robots: A Photothermal-Responsive Hydrogel Actuator with Shape Memory

文献类型： 外文期刊

作者： Zhao, Jinxue 1 ; Zhai, Xuejing 2 ; Li, Peiyi 1 ; Wang, Xinghai 1 ; Wen, Yahui 1 ; Xia, Wei 2 ; Luo, Tuyan 6 ; Wu, Lidong 1 ;

作者机构： 1.Shanghai Ocean Univ, Coll Food Sci & Technol, Shanghai 201306, Peoples R China

2.Chinese Acad Fishery Sci, State Key Lab Mariculture Biobreeding & Sustainabl, Qingdao 266071, Shandong, Peoples R China

3.Chinese Acad Fishery Sci, Beijing 100141, Peoples R China

4.Dalian Ocean Univ, Coll Food Sci & Engn, Dalian 116023, Peoples R China

5.Beijing Univ Technol, Coll Environm Sci & Engn, Beijing 100020, Peoples R China

6.Fujian Acad Agr Sci, Inst Agr Qual Stand & Testing Technol, Fuzhou 350002, Peoples R China

关键词： Sea cucumber peptides; actuator; hydrogel; liquid metal; stimuli-response

期刊名称：ACS APPLIED MATERIALS & INTERFACES （ 影响因子：8.2； 五年影响因子：8.5 ）

ISSN： 1944-8244

年卷期： 2025 年 17 卷 4 期

页码：

收录情况： SCI

摘要： Soft robotics has undergone considerable progress driven by materials that can effectively transduce external stimuli into mechanical actuation. Here, we report the development of a photothermal-responsive hydrogel actuator with shape memory capabilities inspired by the adaptive locomotion of sea cucumbers. This actuator is based on sea cucumber peptides (SCP) and a liquid metal (LM) hydrogel network that is responsive to near-infrared (NIR) light. Upon NIR irradiation, the hydrogel undergoes a phase transition from a swollen to a collapsed state, resulting in a controlled volumetric and shape change. Incorporating a shape memory polymer (SMP) into the hydrogel matrix facilitates the actuator's retention of its deformed configuration following stimulus removal, thereby enabling intricate, multiphase shape transformations. This SCP/LM hydrogel overcomes the limitations of traditional hydrogels and achieves good stretchability (3,000%) and enough adhesion (21 kPa), exhibiting no toxicity to human cells. Furthermore, the actuator exhibited significant bending and complex deformation within 100 s of NIR exposure. This photothermal-responsive hydrogel actuator offers new opportunities for soft robotics and biomedical applications, showcasing a potential pathway for incorporating shape memory and photothermal-responsive materials into the next generation of smart soft devices.

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