The Effect of Sodium Hydroxide (NaOH) Activator on Bamboo-Activated Carbon on the Shielding Effectiveness of Electromagnetic Wave Interference (SE-EMI)

Abstract

This study describes NaOH's role in synthesising bamboo activated carbon (BAC) for the effectiveness of electromagnetic wave radiation shielding (SE-EMI). The process begins with BAC 325 mesh sieving and continues with NaOH activation. The dissolved NaOH will become ions, activating the dipole force and causing a dipole moment. As the reaction between carbon and NaOH increases, the ions diffuse and damage the carbon wall. It opens new pores or widens existing pores and increases surface area. The results of this study show the influence of NaOH activators on bamboo-activated carbon, namely the formation of a microporous structure with an increase in specific surface area of 152.6320 m2 / g. High porosity and wide material surface affect the conductivity value of the material, thereby increasing the absorption of electromagnetic wave radiation indicated by the SE value of 13.2 dB. Adding NaOH has no significant effect on aromatic functional groups in BAC. The aromatic group will cause a magnetic moment on the surface of BAC, affecting the absorption of electromagnetic wave radiation. EMI radiation shielding materials prepared using simple treatment can produce materials with high porosity, large surface area and considerable effectiveness value. This could be an essential reference for subsequent EMI radiation shielding research.