导电油墨复合材料的制备及性能研究

Study on Preparation and Properties of the Conductive Ink Composite Materials

以热固性酚醛改性环氧树脂作为联结剂,以石墨/炭黑为导电填料,制备了改性环氧树脂基导电油墨。采用电阻仪、热重分析仪、力学性能测试及扫描电镜研究了其导电、耐热、力学性能及形貌特征。导电填料,钛酸丁酯,聚乙二醇,磷酸三丁酯的最佳比例分别为:60%,5%,0.5%和0.3%。导电油墨的起始分解温度为348℃,在600℃的残炭率为30%。弯曲强度、弯曲模量和弯曲应变较纯的环氧树脂体系分别提高了66.2%、29.2%和49.3%。

Conductive ink composed of modified epoxy resin and conductive graphite / carbon black had been successfully prepared.The conductivity,heat resistance,mechanical properties and morphology of the conductive ink were investigated by electric resistance instrument,thermogravimetric analysis（TGA）,mechanical property test and SEM analysis.Conductive ink exhibited excellent conductivity when the conductive fillers,tetrabutyl titanate,polyethylene glycol and tributyl phosphate contents reached 60 wt%,5 wt%,0.5 wt% and 0.3 wt%,respectively.The initial decomposition temperature of conductive ink was 348 ℃.The char yield at 600 oC is 30 %.Flexible strength,flexible modulus and fracture flexible strain increased by 49.3 %,29.2 % and 66.2% in comparison to the pure epoxy resin,respectively.