The invention relates to
carrageenan special for empty capsules and a preparation method and application of the
carrageenan, and belongs to the field of material science, the method comprises the following steps: dissolving
carrageenan as a
raw material in an acid solution with the pH value of 3.1-3.5 to prepare a glue solution with the
mass percent of 10%, carrying out
hydrolysis by utilizing acidification high temperature, stopping
hydrolysis until the
viscosity is 300-2000mPa. S, and cooling to
room temperature to obtain the carrageenan. And neutralizing, dialyzing to remove impurities,
drying and crushing to obtain the carrageenan special for the empty
capsule. According to the invention, carrageenan is partially degraded by controlling
reaction conditions, only the
fragment size of the carrageenan is reduced, the obtained low-
viscosity carrageenan does not lose the gelling property and film-forming property and can successfully replace
gelatin to prepare hollow capsules, a new
raw material is provided for hollow
capsule products, the problem that the use amount of macromolecular carrageenan applied to the hollow capsules is limited is solved, and the application prospect is wide. The current situation that carrageenan empty capsules do not exist in the market is solved.