Lanzhou Institute of Materials 3D printing paper base photothermal reversible drive device research progress

China Instrument Network Instrument Development The driver is a device that can generate displacement response or provide mechanical output when stimulated by an external signal source. The device converts electricity, heat, light and other forms of energy into mechanical energy according to established procedures. In recent years, flexible paper-based drives have attracted attention because of their light weight, low cost, and bendability. However, due to the poor water resistance, solvent resistance, and heat resistance of paper-based materials, how to prepare structures on paper substrates Driven devices have become one of the bottlenecks that restrict their development.

The schematic diagram of 3D printing paper base double brake and its opening and closing process of bionic flower brake

Recently, the Research Group of Materials Surface Interface of the Lanzhou Institute of Chemical Physics of the Chinese Academy of Sciences adopted 3D printing to realize the rapid preparation of paper-based photothermal driving devices. Researchers developed MWCNTs-PLA composite wires by incorporating multi-walled carbon nanotubes (MWCNTs) with excellent photothermal effects in polylactic acid (PLA), and then printed on general office paper using a melt deposition (FDM) additive manufacturing process. Paper-based two-layer structure driving device was prepared, and the stability of the two-layer structure of the driver, the thickness of the print layer of the functional layer composite and the design of the print layer structure on the actuation effect of the driver, and the influence on near-infrared (NIR) light were deeply studied. Factors that cause mechanical response behavior. Using the advantages of free design and manufacturing with 3D printing technology, based on the principle of bionic structure design, the simulation and demonstration of the reversible process of bionic petal actuator under the control of NIR laser flowering were studied and simulated.

This work was recently published on J. Mater. Chem. C (2018, 6, 2123-2131). Not long ago, the research group also reported on the assembly-free manufacturing of magnetically driven devices using additive manufacturing advanced technology (Adv. Mater. Interfaces, 2017, 4, 1700629). The work on the construction of 3D printed flexible optical and magnetic driving devices has provided new construction methods and solutions for the research and application of intelligent machines, robots, and other functions to realize bending, deformation, and cargo transportation. The above work was supported and supported by the National Natural Science Foundation of China (51775538, 51573199), the Science and Technology Plan of Gansu Province (17JR5RA318, 1606RJZA051) and the "Guangxi Light of the West" Talent Cultivation Program of the Chinese Academy of Sciences.

(Original Title: Advances in Research on Photothermal Reversible Driving Devices for 3D Printing Paper Based on Lanzhou Institute of Materials)