Dispersion Investigation of Barium Chromate and Zirconium Microparticles in Aqueous Solution of Thermal Paper Using Different Surfactants

Thermal paper as a pyrotechnic source of thermal batteries is typically including combinations of barium chromate, zirconium and mineral fibers. For the deposition of barium chromate and zirconium microparticles on thermal paper, these should be dispersing in solution. In this study, dispersion of these particles in aqueous medium by using sodium dodecyl sulfate (SDS), Triton X-114, carboxymethyl cellulose (CMC), cetyltrimethylammonium bromide (CTAB), cetylpyridinium chloride (CPC) surfactants and using of UV-Visible spectroscopy were investigated. In this regard to determine the optimal condition, the effect of parameters of milling time, mixing time and temperature has been studied. First the medium pH must be adjusted lower that the isoelectric point (pH=6.5-6.8) because the particle surface charges opposite to the surfactant charge. The results showed that in comparison with the other surfactants, CMC is more effective for the both particle. Condition Optimization for 0.005 M of barium chromate and 0.022 M of zirconium indicated that the milling times of 120 and 180 minutes, the stirring times of 180 and 120 minutes and the temperatures of 70 and 80 °C were optimize respectively.