基于锦纶滤膜喷墨印花制备镓-铟合金液态金属电路

针对因镓-铟合金(EGaIn)液态金属(LM)具有极大的表面张力导致难以润湿基底的问题,筛选出合适的表面活性剂并利用探头超声波得到稳定的EGaIn电子墨水。利用扫描电子显微镜、透射电子显微镜、X射线光电子能谱、傅里叶红外光谱仪、X射线能量色散谱表征液态金属纳米微球的微观形貌和表面元素分布,优化得到最佳制备工艺;并通过喷墨打印在锦纶滤膜基底上成功制备图案化导电电路测试其导电性能。结果表明:用聚乙烯吡咯烷酮(PVP)作为表面活性剂,当其添加量为200 mg,超声波处理时间大于30 min时,电子墨水展现出优异的分散稳定性;当打印次数大于6,烧结后的图案化电路电阻低于150 Ω,可成功点亮发光二极管。

Ink-jet printed circuit of gallium-indium alloy liquid metal based on polyamide film

In order to solve the problem that it is difficult to wet the substrate due to great surface tension of gallium-indium alloy(EGaIn) liquid metal (LM), a suitable surfactant was selected and a stable EGaIn electronic ink was fabricated by the probe ultrasonic method. The micro-morphology and surface element distribution of liquid metal nanospheres were characterized by scanning electron microscope, transmission electron microscope, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy (FT-IR) and X-ray energy dispersion spectroscopy, and the best preparation process was optimized. The patterned conductive circuit was successfully prepared on the polyamide filter film by ink-jet printing to test its electrical conductivity. The results show that when polyvinylpyrrolidone (PVP) is used as surfactant, PVP is added to 200 mg, ultrasonic time is longer than 30 min, the electronic ink shows excellent dispersion stability. The resistance of the patterned circuit after sintering reached lower than 150 Ω after printing more than 6 times, and a LED was lit successfully.