【作者】 方一；

【导师】 李路海；

【作者基本信息】 北京印刷学院 ， 材料物理与化学， 2009， 硕士

【摘要】 为了研究适用于薄膜印刷电子产业的喷墨导电墨水,得到厚度薄、表面电阻低的导电层。在制备得到粒径小、浓度较高的纳米银稳定悬浮液后,通过对其进行喷墨印刷适性调试,得到可上机打印的喷墨导电墨水,并对打印样张的导电性能及其影响因素进行了研究。采用液相化学还原法,通过调节银盐和水合肼的摩尔比,在高分子保护剂聚乙烯吡咯烷酮(PVP)的作用下,反应得到平均直径为50 nm的纳米银悬浮液。利用丙酮和去离子水清洗反应后的悬浮液,除去反应杂质,然后在高速离心的作用下,分离得到较为纯净的高浓度的纳米银沉淀。将纳米银沉淀重新分散,调整其pH值、粘度、电导率和表面张力等参数,最终得到了银含量为2.5%的喷墨导电墨水。经耐候性测试实验发现,常温下,喷墨导电墨水在较长时间内的稳定性能良好。在EPSON ME1+打印机上进行墨水打印测试,通过对不同打印精度、打印次数和不同介质的样张进行对比,得出最佳打印条件。对得到的打印样张进行不同手段的后处理,比较后处理前后样张导电性能的变化。研究发现,喷墨导电墨水在高精度打印设置下,在相纸上重复打印三遍形成导电层的导电性能较好,其厚度小于1μm。在对样张进行水洗、低温烧结和激光扫描后处理后,导电性能进一步改善,最低可达到4Ω／□。更多还原

【Abstract】 To study the inkjet printing conductive ink applied to the film electronic industry, to obtain thin,low surface resistance conductive coating.Stable nanosized silver suspension of small size and high concentrations was prepared in this thesis and through its inkjet Printability adjusting,finally obtain the conductive ink which could be on the ink-jet printing,the conductive properties of the printing sample and its effects Factors were studied.Adopting the liquid-phase chemical reduction,by regulating the molar ratio of the silver salt and hydrazine hydrate, in the polymer agent PVP role,the response has been an average diameter of 50 nm nanosized silver suspension. To washing the suspension using acetone and deionized water, to remove impurities,and then in the role of high-speed centrifuge,isolated pure high concentration nanosized silver deposition.The nanosized silver precipitation will be re-distributed,to adjust its pH value,viscosity, surface tension and electrical conductivity, and other parameters, and finally the silver content of 2.5 percent of the conductive ink-jet ink. After weathering testing,it found that the conductive ink has good performance and stability in an extended period in the room temperature.The printer EPSON ME1+was used for the printing tests by different printing accuracy, the numbers of printing and different printing stock. After comparing the samples,obtain the best printing condition.The print samples were treated by different means of post-treatment. The conductivity of the samples were compared before and after post-treatment. It found that in the set of high-precision,and repeat to print three times in the printing stock, the conductive performance of the conductive layer is good,and its thickness is less than 1μm.The samples after water washing,sintering processing and laser scanning,have a better electric conductivity, the minimum can reached 4Ω/□.更多还原