Effect Of Stretchable Conductive Ink On Electrical Conductivity Under Tensile Stress

Lin, Soong Jin (2019) Effect Of Stretchable Conductive Ink On Electrical Conductivity Under Tensile Stress. Project Report. UTeM, Melaka, Malaysia. (Submitted)

Text (24 Pages) Effect Of Stretchable Conductive Ink On Electrical Conductivity Under Tensile Stress.pdf - Submitted Version Download (359kB)

Abstract

Conductive ink is widely used in industry especially in the electronic printed industry. Conductive ink is more flexible, smaller and multi-purpose compare with the traditional wire and electronic devices. There are several types of conductive ink such as copper nanoparticle conductive ink, conductive polymer, carbon complex ink and others. Each type of conductive ink has different mechanical properties and function. The conductive ink can be printed on the substrates by different method such as laser printing, screen printing and so on. The aim of this research is to investigate the conductivity of the conductive ink under tensile stress. The carbon conductive ink needs to print on the thermoplastic polyurethane (TPU) and cure in the oven by using 120°C and 30 minutes. The conductive ink is clamp on the stretching equipment and stretch in different elongation. The resistivity is measure by multimeter and the sheet resistance is measured by four-point probe. Surface structure of the conductive ink is observed by using microscope and recorded down in computer. The result shows that the resistance increased when the elongation increased. For 40mm length of conductive ink, the initial resistance is 0.562 kΩ and its become 1.217 kΩ when stretch until18% of its initial length. The sheet resistance of the conductive ink also increased due to the defection on the surface of conductive ink when under tensile stress. For 40mm length of conductive ink, the sheet resistance is 793.17 R/sq at initial state and become 3059.37 R/sq when stretch until 18% of its initial length. By comparing the different length of the conductive ink, the cracking point for 40mm length of conductive ink when stretching with 5.6mm of elongation while the strain level is 0.14. Besides, the cracking point of 60mm length of conductive ink is 9.6mm of elongation with 0.16 of the strain level. The strain level of the cracking point between different length are very closed. As conclusion, when under tensile stress, the sheet resistance and resistivity will increase which mean the drop of conductivity. The conductive ink will start to crack when the strain level is reach around 0.15.

Actions (login required)

View Item