Abstract: In view of the problems of complicated process, limited wire width, high cost, poor flexibility existing in the preparation of conductive lines on fabric surface, a method of forming of the conductive lines on fabric surface based on droplet ejection technology combined with chemical reaction is proposed. Using built pneumatic double nozzle droplet ejection systems, stability ejection experimental research on ascorbic acid and silver nitrate solution is carried out. On this basis, deposition experiment of dot matrix and conductive lines with different substrate speed on the cotton fabric substrate is conducted; width and square resistance measurements and microstructure observations of formed conductive lines are conducted. The results show that the ejection system can achieve controlled injection and fixed deposition reaction of the two solutions, and point size of formed dot matrix by fixed deposition reaction is uniform, products are predominantly silver particles. Results of line width and square resistance measurement and SEM photos show that with the increasing substrate motion speed, line width first increases and then decreases, the number of the silver particles after the reaction first increases and then reduces, the mean of square resistance and standard deviation of conductive lines first decrease and then increase, and at the speed of 0.40 mm/s, formed conductive lines have good uniformity, formed silver layer is more dense, the mean of square resistance and standard deviation are minimum.

Key words: conductive lines, droplets, fabric, reactive deposition