A nanocomposite packaging material that inhibits the production of endogenous formaldehyde in shiitake mushrooms

Abstract

The invention discloses a nano-composite packaging material capable of inhibiting generation of endogenous formaldehyde in lentinula edodes.The nano-composite packaging material is prepared with the method including the following steps that, by mass, 15-20% of nano-composite powder, 45-50% of low-density polyethylene, 20-25% of low-density linear polyethylene, 5-10% of a dispersing agent and 3-5% of wax are taken and mixed at a high speed, the mixture is kneaded and extruded by a double-screw extruder, cooling sizing is carried out in a cold water trough, then cutting is performed, and nanometer masterbatch is obtained; by mass, 6-10% of the nanometer masterbatch, 8-12% of anti-fogging agent masterbatch and 80-85% of low-density linear polyethylene are taken and mixed evenly, the mixture is subjected to casting through a double-layer co-extrusion casting machine, and a nanometer preservative film with the thickness of 40 micrometers is formed.The nano-composite packaging material is used for packaging lentinula edodes, a high-temperature and low-oxygen environment is formed in the storage process of lentinula edodes, generation of endogenous formaldehyde in lentinula edodes is effectively inhibited, the storage quality of picked lentinula edodes is well maintained, and the quality safety of lentinula edodes is effectively controlled.

Description

technical field [0001] The invention belongs to the field of quality and safety control of agricultural products, and relates to a nanocomposite packaging material for inhibiting endogenous formaldehyde from shiitake mushrooms. Background technique [0002] my country is a big producer and exporter of edible fungi, among which shiitake mushrooms are the main edible fungi traditionally exported in my country. At present, the annual output of shiitake mushrooms in my country has reached more than 90,000 tons, accounting for more than 78% of the output of shiitake mushrooms in the world. my country's shiitake mushroom products are mainly sold to 117 countries and regions in Europe, America and Southeast Asia, accounting for 92% of the global shiitake mushroom export market. Shiitake mushrooms are delicious, have high nutritional value, and contain a variety of biologically active substances such as polysaccharides, antioxidant substances, dietary fiber, ergosterol, VB1, VB2, f...

AI Technical Summary

Problems solved by technology

However, due to the unsatisfactory performance of the packaging materials in the traditional modified atmosphere packaging, it is difficult to control the precise composition of the gas, which will cause physiological diseases of shiitake mushrooms

However, my country's cold chain system is not in sufficient condition, and the construction of cold storage requires large investment and high energy consumption, which greatly increases the cost, making it difficult to promote it on a large scale across the country.

Different drying methods have better effects and can significantly reduce the formaldehyde content in shiitake mushrooms, but limit the related industries of fresh mushrooms and limit the practical scope

However, chemical methods still have problems in food safety and consumer acceptance due to the addition of chemical reagents.

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