A Study Of Percolation Threshold On Graphene Conductive Ink Filled Resin Epoxy

Hosnie, Aina Natasha (2020) A Study Of Percolation Threshold On Graphene Conductive Ink Filled Resin Epoxy. Project Report. UTeM, Melaka, Malaysia. (Submitted)

Text (24 Pages) A Study Of Percolation Threshold On Graphene Conductive Ink Filled Resin Epoxy.pdf - Submitted Version Download (500kB)

Abstract

Nowadays, there is a new technology that undergoes well development, which has the ability to conduct electricity by using the utility of the ink. This technology is called conductive ink and has been launch recently with the implementation of different materials. In most cases, materials such as silver, carbon, and other conductive materials are used as a filler in the composition of the conductive ink. Additionally, there is a material that still new in this conductive ink industry which is graphene. Graphene is a new treasure so-called “wonder material” that has excellent properties in conducting electricity. The use of graphene as a conductive material in the formulation of ink might give many advantages but some factors can be affecting the performance of the graphene during conducting electricity. One of the factors is the properties and behaviors of the graphene, which can be affecting the ink and its percolation threshold. These factors are a new thing that still undergoes a study by the researchers, as the use of graphene in conductive ink technology is still new. Based on the existing formulation of conductive ink, which is graphene as a filler, a study on the effect of properties and behavior on conductive ink and its percolation threshold has been conducted. The study is used graphene as a filler, epoxy resin works as binder and polytheramine as a hardener. These materials have been blend together by using the centrifugal mixer to form the samples of conductive ink. After that, the samples are undergone the printing and curing process at 100°C for thirty minutes. Samples of the ink have been patterned into four different types which are a straight line, zigzag, curve, and square pattern. Each pattern is print out with three different widths, which are 1mm, 2mm, and 3mm. In this study, to achieve the objectives, there are four tests have been conducted which are voltage and sheet resistivity test by using the four-point probe, hardness test by using nanoindentation, microstructure test on the top surface of ink by using image analyser and study on the existence of an electron by using a scanning electron microscope. This study is carried out both theoretically and experimentally to find out the results. Based on this study, it can be concluded that curve is the best pattern followed by straight line while vice versa with zigzag, and based on the width, 1mm samples has the less efficient in conducting electricity compared to a 3mm samples. Besides that, it is proved that the properties and behavior of graphene affecting the percolation of ink as it found out at the end of the study. These findings of this study will be used in the future for increases the performance of graphene in conductive ink technology.

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