A Moisture-Driven Actuator Based on Polydopamine-Modified MXene/Bacterial Cellulose Nanofiber Composite Film,Advanced Functional Materials

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A Moisture-Driven Actuator Based on Polydopamine-Modified MXene/Bacterial Cellulose Nanofiber Composite Film
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2021-04-23 , DOI: 10.1002/adfm.202101378
Luyu Yang ₁ , Jian Cui ₁ , Lei Zhang ₁ , Xuran Xu ₁ , Xiao Chen ₁ , Dongping Sun ₁

Affiliation

As a new 2D material, MXene (Ti₃C₂T_x) shows great potential as a smart multifunctional humidity-responsive actuator due to its high hydrophilicity and conductivity but suffers from ambient oxidation and mechanical brittleness. Inspired by the mussels, the authors overcome these weaknesses by designing and fabricating a nacre-like and lamellar-structured composite film that consists of polydopamine-modified MXene and bacterial cellulose nanofibers, which shows improved properties as a moisture-driven actuator. The actuator has high conductivity (2848 S cm^–1), excellent tensile strength (406 MPa), and toughness (15.3 MJ m^–3). Moreover, the actuator is highly sensitive to moisture with the advantages of fast response (1.6 s), large deformation (176°), and high actuation force output (6.5 N m^–2). It is additionally demonstrated that the actuator works as the electrical switch, robotic arm, and motor in a moisture-driven manner. Overall, it is believed that this work improves the drawbacks of current MXene-based actuators, laying the groundwork for their wider applications as moisture-driven devices.

中文翻译：

基于聚多巴胺修饰的MXene/细菌纤维素纳米纤维复合膜的水分驱动驱动器

作为一种新型二维材料，MXene (Ti ₃ C ₂ T _x ) 由于其高亲水性和导电性而显示出作为智能多功能湿度响应执行器的巨大潜力，但会受到环境氧化和机械脆性的影响。受贻贝的启发，作者通过设计和制造由聚多巴胺改性的 MXene 和细菌纤维素纳米纤维组成的珍珠层状和层状结构复合薄膜克服了这些弱点，该薄膜显示出作为水分驱动的驱动器的改进性能。执行器具有高电导率 (2848 S cm ^–1 )、优异的拉伸强度 (406 MPa) 和韧性 (15.3 MJ m ^–3）。此外，该执行器对水分高度敏感，具有响应速度快（1.6 s）、变形大（176°）和执行力输出高（6.5 N m ^–2）等优点。另外还证明了执行器以湿气驱动的方式作为电气开关、机械臂和电机工作。总的来说，这项工作被认为改善了当前基于 MXene 的执行器的缺点，为其作为湿气驱动设备的更广泛应用奠定了基础。

更新日期：2021-04-23

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