Modified starch degradable mulching film with good light transmittance performance

Abstract

The invention discloses a modified starch degradable mulching film with good light transmittance performance. The modified starch degradable mulching film is prepared from the following raw materials in parts by weight: 64-70 parts of dry basis corn starch, 23-26 parts of ethyl alcohol, 11-15 parts of monochloro acetic acid, 14-16 parts of silicon dioxide, 0.08-0.1 part of epoxy chloropropane, 0.5-1 part of ultraviolet light absorber, 4-5 parts of superfine calcium carbonate, 2-3 parts of polyoxyethylene wax, 16-20 parts of papermaking waste liquor, 0.1-0.2 part of silane coupling agent, 0.2-0.3 part of antioxygen 1010, 2-3 parts of Arabic gum, 60-80 parts of dimethylformamide, a proper quantity of 85% ethanol solution and a proper quantity of deionized water. The agricultural mulching film with the light transmittance has the advantages of simple preparation technology, good toughness, high strength, excellent light transmittance performance and good environment protection performance, meets the requirements of crops on illumination, does not damage soil and is worth popularizing.

Description

technical field [0001] The invention relates to the technical field of agricultural mulching films, in particular to a modified starch degradable mulching film with good light transmission 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 re...

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.