2025 AIChE Annual Meeting

(555f) Sustainable High-Yield Synthesis of Silver Nanowires Using Tannic Acid for Conductive Ink: Green Chemistry, Economic Feasibility, and Rheology

Authors

Shohreh Hemmati - Presenter, Oklahoma State University
Sina Kaabipour, Oklahoma State University
Finley Neal, Unoversity of Southern Mississippi
Silver nanowires (AgNWs) have garnered significant attention during the past decade thanks to their applications in conductive inks used for electronic applications. The polyol process, widely used for AgNW synthesis, is known for its effectiveness in producing high aspect ratio and high yield nanowires. However, this process suffers from drawbacks such as high energy consumption and use of unsustainable reagents derived from non-renewable resources, which makes its large-scale utilization and economic feasibility challenging. In contrast, green synthesis methods offer potential solutions by employing environmentally friendly and cost-effective approaches. In this study, we offer a high-yield (90 %) approach for the inexpensive, environmentally friendly, and sustainable synthesis of AgNWs, and show that the production cost per grams of AgNWs can be reduced by 33.2 % compared to the polyol process. In addition, we investigate the rheological behavior of the synthesized AgNW-based conductive ink under screen printing and direct writing conditions using flow sweep, peak hold, and frequency sweep tests. The rheological behavior of the AgNW-based conductive ink provides valuable information regarding its use for various printing applications. The proposed cheaper and more sustainable method can serve as a promising alternative for industrial conductive ink manufacturing for printed electronic appliances such as printed circuit boards (PCBs) and flexible transparent conductive films (TCFs).