目的 提高有机聚合物导电墨水直写图案的导电性。方法 在聚乙撑二氧噻吩-聚（苯乙烯磺酸盐）导电墨水中掺入纳米银颗粒（AgNPs）制备混合型导电墨水，并用于制备直写导电图案。结果 直写图案的电阻率测试结果表明，当AgNPs的质量分数从0提高到10%时，图案电阻率从8.7×107 μΩ∙cm下降到931.7 μΩ∙cm；经过20 MPa的施压处理10 min后，图案电阻率均进一步下降，当AgNPs的质量分数为0和10%时图案电阻率分别降到4.2×107和93.8 μΩ∙cm。当AgNPs的质量分数大于10%时，纳米颗粒会出现严重团聚，颗粒与聚合物混合不均匀，从而导致图案电阻不均匀；由于微观组织中孔隙增加，所以图案电阻率增加。结论 在导电聚合物中掺入适量的纳米银颗粒是提高其直写图案导电性的有效途径，该直写图案不需要经过高温烧结，因此对基底材料的选择没有局限性，纳米银颗粒对直写图案导电性的促进作用机制在于为电子提供了更多的通路。该PP/AgNPs复合型墨水有望用于打印射频识别标签中的天线。

The work aims to improve the electrical conductivity of direct-writing patterns of organic polymer conductive ink. Silver nanoparticles (AgNPs) were added to the poly (3,4-ethylenedioxythiophene): polystyrene sulfonate conductive ink to prepare the composite conductive ink and used to prepare the direct-writing conductive patterns. The resistivity test results of direct-writing patterns indicated that, when the mass fraction of AgNPs was improved from 0 to 10%, the pattern resistivity was reduced from 8.7×107 μΩ∙cm to 931.7 μΩ∙cm. After the 20 MPa pressure treatment for 10 min, the pattern resistivity was further reduced. When the mass fraction of AgNPs was 0 and 10%, the pattern resistivity was respectively reduced to 4.2×107 and 93.8 μΩ∙cm. When the mass fraction of AgNPs was more than 10%, nanoparticles would be subject to severe agglomeration. The particles and polymer were not uniformly mixed, thus resulting in non-uniform pattern resistance. As the voids in the microstructure were increased, the pattern resistivity was increased. Addition of a proper amount of silver nanoparticles to the conductive polymer is a feasible way to improve the electrical conductivity of its direct-writing patterns. There is no limitation in substrate material selection because such direct-writing patterns require no high temperature sintering. The mechanism of the electrical conductivity improvement of direct-writing patterns by the silver nanoparticles is that more paths are provided for the electrons. The PP/AgNPs composite ink is expected to be used for printing the antenna of RFID (Radio Frequency Identification) tag.