Page 62 - 《精细化工》2020年第4期

第 37 卷第 4 期 精 细 化 工 Vol.37, No.4
202 0 年 4 月 FINE CHEMICALS Apr. 2020

功能材料
水基石墨烯-铜复合导电浆料的制备及性能

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梅 超 ，屈银虎 ，成小乐 1,2 ，符寒光 1,3 ，张学硕 ，何 炫
（1. 西安工程大学 材料工程学院，陕西 西安 710048；2. 金属挤压与锻造装备技术国家重点实验室，
陕西 西安 710032；3. 北京工业大学 材料科学与工程学院，北京 100124）
摘要：采用水基载体替代有机载体，以粒径为 5 和 15 μm 的混合铜粉作为主导电相，添加少量石墨烯为导
电增强相，按一定的质量配比制备水基石墨烯-铜复合导电浆料。用四探针测试仪、SEM 等分析测试手段研
究水基载体对浆料性能的影响，分析其导电机理并建立导电相连接模型。结果表明，在 m（去离子水）∶
m〔羧甲基纤维素钠（CMC）〕∶m〔聚乙二醇（PEG）〕∶m（消泡剂）=96.9∶1.5∶1.5∶0.1 的条件下制备
的水基载体性能较好；水基载体含量为 30%（质量分数）时，制备的水基石墨烯-铜复合导电浆料具有优良
的印刷性能，且电阻率较小，为 1.65 mΩ·cm；添加石墨烯的水基复合浆料较纯铜浆料电阻率降低了 97.1%，
较有机载体制备的石墨烯-铜复合浆料电阻率降低了 75.78%。制得的导电膜更平坦、致密，导电相间的接
触更紧密，大量的石墨烯在铜粉间隙之间或横向搭接，或径向填充，与铜粉形成并联或串联的导电通道，
从而形成致密的导电网络，改善复合浆料的导电性能。
关键词：石墨烯；水基载体；铜复合浆料；导电机理；功能材料
中图分类号：TM241 文献标识码：A 文章编号：1003-5214 (2020) 04-0696-07

Preparation and properties of water-based graphene-
copper composite conductive paste

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MEI Chao , QU Yinhu , CHENG Xiaole , FU Hanguang , ZHANG Xueshuo , HE Xuan
（1. School of Materials Science & Engineering, Xi′an Polytechnic University, Xi′an 710048, Shaanxi, China; 2. State
Key Laboratory of Metal Extrusion and Forging Equipment Technology, Xi′an 710048, Shaanxi, China; 3. College of
Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China）
Abstract: Water-based graphene-copper composite conductive paste was prepared using water-based
carrier instead of organic carrier, inwhich, mixed copper powder with particle size of 5 and 15 μm as mainly
conductive phase and a small amount of graphene as conductive reinforcement phase. The effect of
water-based carrier on the paste performance was studied by four-probe tester and scanning electron
microscope(SEM). The possible conductive mechanism of water-based graphene-copper composite
conductive paste was discussed and the conductive connection model was established. The results show that
the prepared water-based carriers have better performance when m(deionized water)∶m 〔sodium
carboxymethyl cellulose (CMC)〕∶m〔polyethylene glycol (PEG)〕∶m(defoamer) being 96.9∶1.5∶1.5∶
0.1. When the content of water-based carrier is 30% (mass fraction), the prepared water-based graphene-
copper composite conductive paste has excellent printing performance and a small electrical resistivity of
1.65 mΩ·cm. The resistivity of water-based composite paste with graphene is 97.1% lower than that of pure
copper paste, and 75.78% lower than that of graphene-copper composite paste prepared with organic
carrier.The prepared conductive film is flatter and denser, and the contact between conductive phases is
more compact. A large number of graphene overlaps laterally or fills radially the gap between copper
powders, forming conductive channels in parallel or in series with copper powders and forming a dense

收稿日期：2019-09-11; 定用日期：2019-11-11; DOI: 10.13550/j.jxhg.20190863
基金项目：陕西省重点研发计划项目（2018GY-130）；西安市科技计划项目-高校院所人才服务企业工程（2017074CG/RC037
（XAGC007））；陕西省科学技术研究发展计划-工业攻关资助项目（2013K09-33）；西安工程大学研究生创新基金项目（chx2019063）
作者简介：梅 超（1993—），男，硕士生，E-mail：1138610069@qq.com。联系人：屈银虎（1962—），男，教授，E-mail：quyinhu@
xpu.edu.cn。