Effect of Caboxymethyl Cellulose Sodium on the Properties of Nano Silver Conductive Ink
HE Jun, LI Sha, WANG Hong, ZOU Jing
Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical
Engineering and Technology, Tianjin University, Tianjin 300072, Chin
Abstract：
The effect of caboxymethyl cellulose sodium (CMC) on the properties of nanosilver conductive ink was investigated. Nanosilver particles with diameter around 70 nm were synthesized by liquid phase chemical reduction method using formaldehyde as reducing agent and polyvinyl pyrrolidone as protective agent. The prepared sample was separated by centrifugation and purified by washing for four times to obtain concentrated and relatively pure silver colliod. After adding CMC and other additives, the stable waterbased conductive ink was obtained under ultrasonic treatment. Here, CMC not only acted as the binder agent but also played a vital role in improving the stability of the prepared ink. The zetapotential of the ink was -42.8±0.96 mV, which indicated that it was quite stable. The pattern was fabricated on photo paper by a dropondemand thermal printer. The sheet resistance of the printed pattern decreased significantly from 30.48 kΩ/□ to 0.87 Ω/□ after heating at 150 ℃ for 30 min. According to tape tear test, the adhesion of the pattern to paper substrate was good.
HE Jun, LI Sha, WANG Hong, ZOU Jing.Effect of Caboxymethyl Cellulose Sodium on the Properties of Nano Silver Conductive Ink[J]. Chemcial Industry and Engineering, 2012,29(4): 1-5
2012, Vol. 29 
