材料沉积喷墨打印及
涂层系统解决方案

技术支持

Inkjet、EHD、Ultra-sonic等多种微流体控制技术相关文件、视频资料。

喷墨印刷聚二甲基硅氧烷的弹性微结构作为压力传感器的图案化介电层

发布时间:2017-06-29
发布人:

Abstract

A direct inkjet printing process was developed to fabricate patterned elastic microstructures for pressure sensors using n-butyl acetate diluted polymethylsiloxane (PDMS). The diluted PDMS precursor mixture with a cross-linker exhibited a controllable viscosity below 14 cP in 48 h at 25 °C, and the PDMS film had lower elastic modulus and hardness values than the non-diluted PDMS precursor after curing. The capacitor using the printed PDMS film as the microstructured dielectric layer showed a very high pressure sensitivity of up to 10.4 kPa⁻¹ under the pressure below 70 Pa, and the pressure sensitivity would be dramatically decreased to 0.043–0.052 kPa⁻¹ under the pressure between 2 and 8 kPa. Furthermore, the triboelectric sensors could be structured with an inkjet printed PDMS film and controllably generate the voltage signals up to 1.23 V without any amplification. The results suggest that mechanical properties and patterned elastic microstructures play the key roles in PDMS-based sensor devices, and the PDMS dielectric layer with controlled mechanical properties and microstructures fabricated via directly inkjet printing opens up the applications of the PDMS and its composites in functional devices.

Peng Y ,  Xiao S ,  Yang J , et al. The elastic microstructures of inkjet printed polydimethylsiloxane as the patterned dielectric layer for pressure sensors[J]. Applied Physics Letters, 2017, 110(26):261904.