Biodegradable non-cut water-holding film for shiitake mushroom sticks and preparation method thereof

Abstract

The invention discloses biodegradable non-cut water-holding film for shiitake mushroom sticks, prepared from, by weight, 60-80 parts of polylactic acid, 30-40 parts of starch, suitable distilled water, 12-20 parts of Na-montmorillonite, 4-10 parts of sodium tripolyphosphate, 3-5 parts of urea, suitable glycine-hydrochloric acid buffer solution, suitable dichloromethane, 1-3 parts of glycerol, and 1-2 parts of propanetriol. Polylactic acid is used as a basic film-forming agent combined with starch and montmorillonite to obtain the non-cut water-holding film, shiitake mushroom can grow out by means of its growing force, deformed mushroom is avoided, the shape and quality of shiitake mushroom are improved greatly, good water-holding property is acquired, and the non-cut water-holding film can effectively inhibit the evaporation of water in mushroom sticks and maintain the water inside and breathability.

Description

Technical field [0001] The invention relates to the technical field of light industrial products, in particular to a biodegradable shiitake mushroom stick cutting-free water retention film and a preparation method thereof. Background technique [0002] At present, the conventional bagged mushroom cultivation method is to use ordinary polyethylene resin plastic film bags to directly charge the material. During the fruiting process, when mushroom buds appear on the sticks, the polyethylene resin plastic film bags need a lot of toughness. Manually cut the plastic bag covering the fungus sticks so that the mushroom buds can break through the resistance and grow into shiitake mushrooms. However, this process is time-consuming and labor-intensive, not only causing malformation of edible fungi, but also prone to infection of bacteria and other miscellaneous bacteria, and the discarded plastic bags after planting will also produce white pollution, which causes environmental problems. [0...

AI Technical Summary

Problems solved by technology

However, this process is labor-intensive and time-consuming, which will not only cause deformity of edible fungi, but also easily cause infection by bacteria and other miscellaneous bacteria, and the discarded plastic bags after planting will also produce white pollution, causing environmental problems

[0003] Starch is an environmentally friendly film-forming material that has been researched and developed at home and abroad, but its application is limited due to its low film-forming strength. In the article "Application in Degradable Plastic Film", the porous starch with increased surface area compared to the original starch was prepared first, and then the phosphate starch with a higher degree of substitution was obtained by dry process, and then the modified starch was blended with PVA, and passed Fully biodegradable plastics are prepared by single-screw extruder extrusion granulation, compression molding and other processes, and the mechanical properties of the obtained biodegradable film are improved, and the biodegradability is also improved