In this work,carbon black/polydimethylsiloxane(CB/PDMS)composites were precisely fabricated into flexible micro-lattices with different structural types by 3D printing process with a direct ink writing.An optical microscopy was used to characterize the fabrication quality and structural differences of the composites.The compositions of printing slurries were optimized via the rheology and electric conductivity measurements.A stable filament diameter of 600 μm was achieved through the optimization of manufacturing parameters such as printing speed and extrusion pressure.The effects of structure types on the mechanical and sensing performances were investigated.The results show that the sensitivity of the optimized simple cubic micro-lattice structures is up to 10.33,and the response time is 370 ms.The applications of flexible micro-lattices in the field of wearable devices are demonstrated,exhibiting their excellent capabilities of real-time dynamic monitoring.This work provides a new idea for the fast and low-cost fabrication of flexible multifunctional devices,and the flexible micro-lattices have a broad application prospect in the fields such as flexible electronics.
关键词
3D打印/复合材料/柔性应变传感器/碳黑/聚二甲基硅氧烷/微网格
Key words
3D Printing/Composite/Flexible Strain Sensor/Carbon Black/Polydimethylsiloxane/Micro-lattice
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