Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (05): 78-83.doi: 10.13475/j.fzxb.20180200806

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Influence of process conditions on silver conductive lines by micro-droplet jet printing solution reaction

XIAO Yuan(), YIN Bo, LI Lanxin, LIU Huanhuan   

  1. College of Mechanical & Electrical Engineering, Xi'an Polytechnic University, Xi'an, Shaanxi 710048, China
  • Received:2018-01-30 Revised:2019-01-21 Online:2019-05-15 Published:2019-05-21

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Abstract:

In order to prepare flexible circuit with good electrical conductivity, the influence of the process conditions of droplet jet printing forming the chemical deposition on the performance of the formed conductive circuit was investigated. The double nozzle pneumatic micro-droplet injection system was applied by changing the concentration of two kinds of reaction solution, the concentration of PVP and the pH of the solution. Under the stable system to proceed wire jet printing, the microstructure produced under different conditions were observed and the square resistance were measured. The results shows that when the silver nitrate concentration and the ascorbic acid concentration are 50% and 30%, respectively, the average square resistance of the silver wire is 2.92 Ω/□, and the standard deviation is 0.46 Ω/□, PVP has the effect of controlling the size of silver particles and improving the agglomeration between particles during the reaction of silver conductive lines. When PVP content is 6%, the scanning electron microscopy images show that the silver particles are rice-like, and the connection between particles present a network structure. The reaction conditions vary with pH value, and when the pH value is 2 to 3, more silver particles are prepared and the grain shape is uniform.

Key words: micro-droplet ejection, liquid reduction method, conductive line, microstructure, conductive property

CLC Number: 

  • TH16

Fig.1

Double nozzle pneumatic micro-droplet injection system"

Tab.1

Silver nitrate droplet jet process parameters"

微滴
类型		 供气压力/
MPa		 脉冲宽度/
ms		 喷射
频率/Hz		 球阀开口/
(°)
硝酸银 0.03 1.953 1 45
抗坏血酸 0.04 1.953 1 25

Fig.2

Silver nitrate droplet jet process"

Fig.3

Ascorbic acid droplet ejection process"

Tab.2

Specific implementation scheme of conductive line jet injection printing"

序号 组合质量体积比/% PVP质量体积比/
%		 pH值
硝酸银 抗环血酸
30 18
1 50 30 0 2~3
70 42
90 54
0
2
2 50 30 4 2~3
6
8
2~3
3 50 30 0 8
10

Fig.4

Spray prints in different solution conditions. (a) Different concentrations of jet printing;(b) Different PVP dosages to spray print line forming;(c) Print the silver conductive lines at different pH values"

Fig.5

SEM images of conductive lines deposited on substrate under different concentrations of silver nitrate and ascorbic acid"

Fig.6

Four groups of conductive lines square resistance"

Fig.7

SEM images of deposited conductive lines on substrate under different concentrations of PVP"

Fig.8

SEM images of conductive lines deposited on substrate under different pH values. (a) pH value is 2~3; (b) pH=8; (c) pH=10"

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