Fruit-vegetables fresh-keeping technology based on single oxygen oxidation

Abstract

The invention relates to a fruit and vegetable fresh-keeping technology based on the singlet oxygen oxidation and belongs to the fruit and vegetable fresh-keeping field. The technology adopts the photosensitive method and the chemical method to act on a packaging material and directly generate the singlet oxygen; and further uses the generated singlet oxygen to sterilize fruits and vegetables in the packaging material and eliminate the ethylene emitted from the fruits and the vegetables. The photosensitive method includes irradiating the packaging material coated with the photosensitizer which generates triplet excitation state substance after absorbing photons and obtaining the singlet oxygen. The chemical method includes coating the packaging material with the chemical substance which generates the singlet oxygen and obtaining the singlet oxygen through chemical reactions. The singlet oxygen has high active oxidation and is capable of killing various microbes causing rot and deterioration of the fruits and the vegetables and effectively reducing the ethylene content of the plant incretion, therefore, the fresh-keeping periods of the picked fruits and the vegetables are lengthened effectively. Owing to the short reaction time of the singlet oxygen, no chemical residual generates on the fruits and the vegetables after the reaction and the usage is safe and convenient.

Description

Technical field [0001] The invention belongs to the field of preservation of melons, fruits and vegetables. The technology uses photosensitization or chemical methods to generate singlet oxygen for the packaging and processing of melons, fruits and vegetables, which can be antiseptic and fresh, and extend storage and shelf life. Background technique [0002] Modern preservation technology plays an important role in the storage and transportation of fruits and vegetables, which can effectively reduce decay, reduce losses, and improve economic benefits. However, the preservation of fruits and vegetables is a complex problem. Different varieties of melons and fruits have different reasons for rot or quality degradation, which means that the types of pathogenic bacteria are different. For this reason, many different agents are often used. Therefore, there are many technologies related to the preservation of fruits and vegetables. As of the end of 2007, there were more than 2,000 pate...

AI Technical Summary

Problems solved by technology

However, due to the short lifetime of singlet oxygen, it can only diffuse about 100nm in aqueous solution [8] , making it difficult to use singlet oxygen produced by these physical or chemical methods in practical applications

Therefore, there is no application of using this method to disinfect fruits and vegetables and remove ethylene.