Affiliation:
1. Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China
2. University of Chinese Academy of Sciences Beijing 100049 China
3. Department of Chemistry Renmin University of China Beijing 100872 China
Abstract
AbstractVarious physical and chemical reaction processes occur in non‐aqueous liquid systems, particularly in oil phase systems. Therefore, achieving efficient, accurate, controllable, and cost‐effective movement and transfer of substances in the oil phase is crucial. Liquid‐phase photothermal actuators (LPAs) are commonly used for material transport in liquid‐phase systems due to their remote operability and precise control. However, existing LPAs typically rely on materials like hydrogels and flexible polymers, commonly unsuitable for non‐aqueous liquids. Herein, a 3D porous poly(vinylidene fluoride) (PVDF)/Ti3C2Tx actuator is developed using a solvent displacement method. It demonstrates directional movement and controlled material transport in non‐aqueous liquid systems. When subject to infrared light irradiation (2.0 W cm−2), the actuator achieves motion velocities of 7.3 and 6 mm s−1 vertically and horizontally, respectively. The actuator's controllable motion capability is primarily attributed to the foam's oil‐wettable properties, 3D porous oil transport network, and the excellent photothermal conversion performance of Ti3C2Tx, facilitating thermal diffusion and the Marangoni effect. Apart from multidimensional directions, the actuator enables material delivery and obstacle avoidance by transporting and releasing target objects to a predetermined position. Hence, the developed controllable actuator offers a viable solution for effective motion control and material handling in non‐aqueous liquid environments.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Beijing Municipality
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry