The invention discloses a green and quick preparation method of antibacterial material
sodium alginate-
ascorbic acid nano-silver. The method includes the following steps that (1) a
sodium alginate water solution is prepared; (2) the
sodium alginate water solution is heated and magnetically stirred overnight; (3) a
silver nitrate solution is dropwise added into the overnight stirred sodium alginatewater solution in accompaniment with vortex treatment; (4) an
ascorbic acid solution is dropwise added into the mixture obtained in the step (3) in accompaniment with vortex treatment; (5) ultrasonictreatment is carried out on a mixing
system; and (6) the mixing
system obtained after ultrasonic treatment is centrifuged, supernate is discarded, washing is carried out,
sediment is refrigerated ina refrigerator at the temperature of minus 80 DEG C and subjected to
freeze drying through a vacuum freezer dryer at the temperature of minus 40 DEG C, and
sodium alginate nano-
silver particles are obtained. According to the method, the
sodium alginate-
ascorbic acid nano-silver material is prepared through
ultrasound, quick and green preparation is achieved, and the
sodium alginate-ascorbic acid nano-silver material is a fresh-keeping packaging material with
high potential and is used for prolonging the practical
shelf life of products to be packaged.