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首页> 外文期刊>Advanced Functional Materials >Gradient Porous Elastic Hydrogels with Shape-Memory Property and Anisotropic Responses for Programmable Locomotion
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Gradient Porous Elastic Hydrogels with Shape-Memory Property and Anisotropic Responses for Programmable Locomotion

机译：具有形状记忆特性和各向异性响应的可编程运动梯度多孔弹性水凝胶

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摘要

Programmable locomotion of responsive hydrogels has gained increasing attention for potential applications in soft robotics, microfluidic components, actuators, and artificial muscle. Modulation of hydrogel pore structures is essential for tailoring their mechanical strength, response speeds, and motion behaviors. Conventional methods forming hydrogels with homogeneous or stepwise-distributed pore structures are limited by the required compromise to simultaneously optimize these aspects. Here, a heterobifunctional crosslinker enabled hydrothermal process is introduced to synthesize responsive hydrogels with well-defined gradient pore construction. According to gradient porosity controls, the hydrogels simultaneously exhibit rapid responses to external stimuli, high elasticity/compressibility, and programmable locomotion capability. By incorporating polypyrrole nanoparticles as photothermal transducers, photo/thermal responsive composite hydrogels are formed to enable programmable control of locomotion such as bending, curving, twisting, and octopus-like swimming under near-infrared laser stimulation. The tunable pore structures, mechanical properties, and locomotion of this new class of materials make these gradient porous hydrogels potentially suitable for a variety of applications.
机译：响应性水凝胶的可编程运动已经越来越受到人们的关注，这些潜力可用于软机器人，微流体组件，执行器和人造肌肉中。水凝胶孔结构的调节对于调整其机械强度，响应速度和运动行为至关重要。形成具有均质或逐步分布的孔结构的水凝胶的常规方法受到同时优化这些方面所需的折衷的限制。在这里，引入了具有异双功能交联剂的水热工艺来合成具有明确定义的梯度孔结构的响应性水凝胶。根据梯度孔隙度控制，水凝胶同时显示出对外部刺激的快速响应，高弹性/可压缩性和可编程的运动能力。通过将聚吡咯纳米颗粒作为光热转换器，可以形成光/热响应复合水凝胶，以可编程控制运动，例如在近红外激光刺激下弯曲，弯曲，扭曲和像章鱼一样游泳。这种新型材料的可调节孔结构，机械性能和移动性使这些梯度多孔水凝胶潜在地适合于各种应用。

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