Preparation and FTIR spectroscopic studies of SiO2-ZnO nanoparticles suspension for the development of carrageenan-based bio-nanocomposite film

Abstract

Fourier Transform Infrared Spectroscopy (FTIR) is very sensitive to the chemical surface of nanoparticles. FTIR spectra were measured and used to identify functional groups in the material. A simple comparison of standard spectra and samples proves that the FTIR technique is useful for monitoring functional groups in a mixed suspension. In this study, the chemical interaction between silica dioxide (SiO2) and zinc oxide (ZnO) nanoparticles with SDS surfactant and water was evaluated using FTIR spectroscopy with wave numbers of 500-4000 cm−1. FTIR analysis was carried out on nanoparticle suspension material and SiO2−ZnO nanoparticle suspension with different ratios (1:1, 1:2 and 1:3% w/w carrageenan). The SiO2−ZnO nanoparticle suspension will be used as a filler in carrageenan bio-nanocomposite films through beads milling process. The results showed that in all suspension formulations identified a new functional group (Si−OH) as an interaction between Si elements and OH (hydroxyl groups) from water. Typical functional groups in each material are identified in nanoparticle suspension in shifting wave numbers.