Discrete Bubbles Infrared, Millimeter Wave Extinction Performance Study

Discrete bubbles are different from the traditional aerosol, and have a nice military foreground with sustained light attenuation effect by using safely and proportioning conveniently.The formation of discrete bubbles and principle of discrete bubbles stability, as well as the factors affecting the bubbles stability which were molecule structure of surfactants, surface electric charge, surface tension, surface conglutination, temperature and pressure were discussed. The principle of extinction performance was studied by two aspects which were the special structure of the single bubble and the consumption of the electromagnetic wave by discrete bubbles. The infrared extinction performances of static bubble, dynamic bubble, single bubble and bubbles were studied experimently using FTIR; the attenuation performance of discrete bubbles to millimeter wave (MMW) was also studied. The results show that discrete bubbles have a better infrared extinction performance and the attenuation would have an obvious increase as the increase of bubble density on the optical path.Owing to the not perfect result of MMW experiments, some functional additions were added to vesicant to improve the attenuation on MMW. The adsorption mechanism between additions and surfactants was discussed and some factors affecting the adsorption (e.g., the lengths of hydrocarbon chain in the surfactants, temperature, pH, electrolyte, surface character of solid) were discussed preliminarily. Although the effect of the four additions( SiC, AlN, Si₃N₂, Fe₃O₄) was not obvious, to some extent it paved a way for the subsequent research.