Analysis on the mixing process and the substrate surface treatment of the stretchable conductive ink

Mohd Yusoff, Nur Arifah (2022) Analysis on the mixing process and the substrate surface treatment of the stretchable conductive ink. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

This research demonstrates the optimized mixing parameters of stretchable conductive on the sheet resistivity performance and the effect of chemical surface treatment on the substrate of the stretchable conductive ink. The mixing parameter was divided into three ranges which are 400 rpm in 10 minutes, 1500 rpm in 30 minutes, and 2000 rpm in 60 minutes. A rectangular shape of TPU is used as the substrate in this experiment. The mixture of ink consists of GNPS as a filler, PEDOT:PSS as a functional binder, and a few types of solvents used such as DMSO, EG, and Triton X-100. Sheet resistivity performance measured for all samples shows that the best mixing parameter is 400 rpm in 10 minutes reached the lowest sheet resistivity compared to another sample. Two types of adhesion promoters were used in this experiment as chemical surface treatment such as Methyl Ethyl Ketone (MEK) and Anchor Spray Paint (ASP). The adhesion promoter was applied on the TPU substrate before printing the conductive ink. Then, the sheet resistivity performance was measured on the sample and plot the comparison with the sample without adhesion promoter. Thus, it can be concluded that the sample with adhesion promoter reached the lowest sheet resistivity performance.

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