Degradable biological starch mulching film capable of increasing yield of crops

Abstract

The invention discloses a degradable biological starch mulching film capable of increasing yield of crops. The degradable biological starch mulching film is prepared from, by weight parts, 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 epichlorohydrin, 60-80 parts of dimethylformamide, 1-2 parts of zinc barium compound stabilizer, 2-3 parts of calcium stearate, 5-7 parts of tea polysaccharide, 8-11 parts of vermiculite, 2-3 parts of urea, 2-3 parts of PE wax, an appropriate amount of ethanol solution with a concentration of 85% and an appropriate amount of deionized water. The prepared mulching film is quick in degrading speed, can improve soil environment and fertility and promote crop yield increase, does not contain toxic or harmful substance, and is safe in ingredient, economical and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of agricultural mulching films, in particular to a degradable bio-starch mulching film that can increase the yield of crops. 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, w...

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.