Starch-based composite mulching film with good water resistance performance

Abstract

The invention discloses a starch-based composite mulching film with good water resistance performance. The starch-based composite mulching film comprises, by weight, 64-70 parts of dry-basis corn starch, 23-26 parts of ethyl alcohol, 11-15 parts of monochloroacetic acid, 14-16 parts of silicon dioxide, 0.08-0.1 part of epoxy chloropropane, 60-80 parts of dimethyl formamide, 4-5 parts of silicone, 4-5 parts of adhesives, 2-3 parts of brown seaweed polysaccharide, 0.05-0.08 part of glutaraldehyde, 4-5 parts of polyacrylonitrile-based carbon fibers, 3-5 parts of dioctyl phthalate, 0.2-0.3 part of antioxygen BHT, appropriate parts of 85% of ethanol solution and appropriate parts of deionized water. The degradable agricultural mulching film can be completely decomposed by microorganisms, does not influence environment, and has excellent performance and high water, aging and impact resistance; film forming property is excellent, production efficiency is high, and cost is reduced.

Description

technical field [0001] The invention relates to the technical field of agricultural mulching films, in particular to a starch-based composite mulching film with good water blocking performance. 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, ...

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.