Anti-oxidation low-cost degradable agricultural starch-based composite mulching film

Abstract

The invention discloses an anti-oxidation low-cost degradable agricultural starch-based composite mulching film. The composite mulching film is prepared from, by weight, 64-70 parts of dry basis corn starch, 23-26 parts of ethanol, 11-15 parts of monochloro acetic acid, 14-16 parts of silicon dioxide, 0.08-0.1 part of epoxy chloropropane, 60-80 parts of dimethylformamide, 1-3 parts of maltitol, 4-6 parts of medical stone fiber, 14-17 parts of orange peel powder, 4-5 parts of tea polysaccharide, 5-6 parts of polyvinyl alcohol, 2-3 parts of barium-zinc heat stabilizer, an appropriate amount of 85% ethanol solution and an appropriate amount of deionized water. The degradable agricultural mulching film has the good heat retaining property, pest removing property and oxidation resistance and is good in water blocking and air blocking properties, the film is easily formed and can be completely degraded and digested by microorganisms in the nature, and green and environmental protection are achieved.

Description

technical field [0001] The invention relates to the technical field of agricultural mulch, in particular to a degradable agricultural starch-based composite mulch with low oxidation resistance cost. 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 resou...

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.