Novel fruit and vegetable fresh-keeping film and preparation method thereof

Abstract

The invention discloses a novel fruit and vegetable fresh-keeping film and a preparation method thereof. The novel fruit and vegetable fresh-keeping film is prepared from the following raw material components: polyethylene, polyethylene glycol, glycerinum, dodecyl alcohol ester, herba andrographitis extract liquid, radix sophorae flavescentis extract liquid, herba portulacae extract liquid, and functional filler. The preparation method comprises the following steps: (1) mixing the polyethylene, polyethylene glycol, glycerinum and dodecyl alcohol ester, emulsifying and stirring at a high speed,and forming a film matrix; (2) mixing herba andrographitis extract liquid, radix sophorae flavescentis extract liquid and herba portulacae extract liquid, adding the functional filler, heating, stirring, drying, and obtaining powder; (3) adding the powder in step (2) into the film matrix in step (1), stirring, heating, preserving the heat, cooling to room temperature, pouring into a two-screw extruder, plasticating, film blowing, drying, and obtaining the fruit and vegetable fresh-keeping film. The fruit and vegetable fresh-keeping film prepared in the invention is simple in preparation process, low in cost, capable of effectively improving the fresh-keeping quality of fruits and vegetables and prolonging the fresh period of the fruits and vegetables, and safe, environment-friendly and nontoxic.

Description

Technical field [0001] The invention belongs to the technical field of fruit and vegetable storage, and specifically relates to a novel fruit and vegetable fresh-keeping film and a preparation method thereof. Background technique [0002] In recent years, with consumers' increasing demand for fresh fruits and vegetables, and increasing attention to the freshness and safety of fruits and vegetables, the market has put forward higher requirements for the quality of fruits and vegetables. After most fruits and vegetables are picked, the supply of water and nutrients is interrupted. Respiration and transpiration continue to consume the nutrients of fruits and vegetables, and the ethylene produced during transportation and storage will accelerate the aging and decay of fruits and vegetables, thereby breeding bacteria, which is not conducive to the preservation of fruits and vegetables. [0003] The existing fruit and vegetable fresh-keeping film is generally added or coated with an ethy...

AI Technical Summary

Problems solved by technology

This type of plastic wrap has a limited amount of ethylene adsorption, resulting in a short preservation time, and the bacteria contained in the fruits and vegetables will multiply and the fruits and vegetables will lose their freshness.