Fourier Transformed Infrared (FTIR) spectroscopy for analysis of cholesteryl acrylate liquid crystall-indium tin oxide composites

Abstract

The aim of this research is to synthesis composites and polymerizations of cholesteryl acrylate with dopan of Indium Tin Oxide (ITO). Composite of cholesteryl acrylate-ITO was made by using casting solution technique at 75°C for 30 minutes. Monomer cholesteryl acrylate and ITO have succeeded in becoming a composite with blending process in variations concentrations of ITO. The photopolymerization process by UV curing method with variation of UV lamp power that is 10, 25, 40 and 55 watt. Analysis of functional group with FTIR showed vibration of In-OH bond with C-O at wave number 1056,99 cm-1. Other peak in wave number 2929,87 cm-1 for vibration of groups in bond C-H in vinyl, wave number at 2860,01 cm-1 for vibration bond of C-H alyfatic. Spectrum FTIR of ITO showed at wave numbers: 437,84; 487,99; 534,28; 619,15 cm-1. Therefore, after photopolymerizations process, peak at 2100 cm-1 has disappeared in spectrum FTIR of Cholesteryl acrylate which showed molecule of cholesteryl acrylate had polymerized. Conductivity of composite of cholesteryl acrylate-ITO was determined using by LCR meter. In general conductivity value and permittivity of composite of cholesteryl acrylate-ITO increase with the increasing of the concentration of dopan ITO was added to the composites. SEM images of composite of cholesteryl acrylate-ITO show that pores of cholesteryl acrylate had been filled by ITO particles. The SEM-EDX data show that the content of the elements contained in the composite cholesteryl acrylate-ITO are: C 76.91%, O 3.13% and In 5.13%. The value conductivity (σ) of composite of cholesteryl acrylate-ITO is 4.078 x 10-10S/m, therefore polymer of cholesteryl acrylate-ITO of σ is 11.2 x 10-10S/m.