石墨烯基导电墨水的制备及性能

摘要

为了提高碳基导电墨水的综合性能，以量产石墨烯为导电填料，和环氧树脂共混制备了导电墨水并测试其性能。采用扫描电子显微镜分析、X 射线衍射分析、热重分析、机械性能测试、红外光谱分析和电阻测试研究了导电墨水固化后的微观形貌、晶体结构、热稳定性、力学性能、固化状态及导电性能。TGA 和 FTIR 结果显示：导电墨水具有良好的耐热性能并且达到了良好的固化状态；导电墨水的力学性能良好，当石墨烯质量分数为12％时，导电墨水的断裂强度为34 MPa；对导电墨水的电阻率与石墨烯质量分数之间的关系研究结果表明，当石墨烯质量分数为24％时，导电墨水的电阻率为5．23Ω·cm。%To improve the properties of carbon-based conductive ink,the conductive ink was prepared and its properties were test-ed by using commercial graphene and epoxy resin.The micro-morphology,crystal structure,heat resistance,mechanical proper-ties,curing state and resistivity of the cured conductive ink was investigated by SEM,X-Ray Diffraction (XRD),thermogravime-tric analysis(TGA),mechanical property tester,fourier transform infrared spectroscopy (FTIR)and electric resistancer.TGA and FTIR shows that the conductive ink possesses good heat resistance and has been cured completely.The conductive ink exhib-its high mechanical properties according to the results that the fracture strength of the cured polymers with 12% graphene content is 34 MPa.Furthermore,the relationship between graphene contents and the resistivity of conductive ink was discussed.The re-sults indicate that the resistivity of the cured polymers with 24% (mass ratio)graphene content is 5.23 Ω·cm.