Wetting behavior and drying mechanism of a cellulosed-based aqueous coating solution on the spherical propellant.

In order to determine the wetting and drying mechanism of Surelease®-Nitrocellulose aqueous coating solution during the coating of small-sized spherical propellant, and thus to provide theoretical guidance for the preparation of the coated spherical propellant. In this paper, combining with the surface wetting theory, the adhesion work, interfacial tension and the spreading coefficient of the coating system on the surface of the spherical propellant were calculated. The infrared spectrometer was used to explore the chemical interaction between the coating layer and the matrix propellant. In addition, based on the emulsion film-forming principle, the drying kinetics of the coating system was investigated in detail, and the influences of nitrocellulose content on the drying process were investigated. Meanwhile, the macro and micro morphology of the aqueous coating solution during the drying process were also investigated with the help of camera and scanning electron microscope. [ABSTRACT FROM AUTHOR]