Stable degradable biological starch mulch

Abstract

The invention discloses a stable degradable biological starch mulch which is prepared from, by weight, 64-70 parts of dry-based corn starch, 23-26 parts of alcohol, 11-15 parts of monochloric acetic acid, 14-16 parts of silicon dioxide, 0.08-0.1 part of epoxy chloropropane, 60-80 parts of dimethyl formamide, 6-8 parts of polylactic acid, 3-4 parts of Pulan polysaccharide, 2-3 parts of micrystalline wax, 4-5 parts of epoxy soybean oil, 3-4 parts of waste plant oil, 3-4 parts of citric acid and proper amounts of 85% alcohol and deionized water. A preparation method is simple in step, easy to operate, high in stability, extensive in raw material and low in cost, and the mulch prepared by the method has good performance in resisting bacteria and aging and blocking air and is worthy of popularization, and service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of agricultural mulch films, in particular to a stable degradable bio-starch mulch film. Background technique [0002] At present, plastic film mulching technology has been widely promoted in agriculture, and has been applied to the planting of wheat, rice, corn, soybean, sorghum, cotton and other crops, and the effect of increasing production is obvious. It is neither corroded by microorganisms nor decomposed by itself. If things go on like this, it will inevitably bring pollution hazards that are difficult to solve for future generations. Therefore, research on degradable mulch has gradually attracted attention. Starch is an abundant renewable resource in nature. It is non-toxic, harmless, and completely biodegradable. However, its poor mechanical properties and waterproof properties limit its application. Its application is limited. Starch is a renewable resource, which not only has a wide range of so...

AI Technical Summary

Problems solved by technology

[0003] In the article "Study on Hydrophobic Modified Starch / PVA Biodegradable Plastic Mulch Film", the author used corn starch as raw material, which was double-modified by carboxymethyl etherification and cross-linking. The molar ratio of starch is 1.85, the etherification time is 2.33h, and the concentration of ethanol is 84.65%. The dosage is 1.5%, and then get cross-linked carboxymethyl starch with strong thermoplasticity, and then use it to blend with PVA. After cross-linking, speed-up, and hydrophobic modification, the mechanical properties of the film meet the standard requirements, and the water absorption rate is greatly improved. However, its comprehensive performance is still not up to the needs of actual use, and it needs to be further modified to meet various use requirements, so as to improve the mechanical properties, toughness, strength and other properties of starch films, and expand the scope of application.