Bamboo fiber-added degradable starch-based agricultural mulching film

Abstract

The invention discloses a bamboo fiber-added degradable starch-based agricultural mulching film. The agricultural mulching film is prepared from the following raw materials in parts by weight: 64-70 parts of dried corn starch, 23-26 parts of ethanol, 11-15 parts of monochloroacetic acid, 14-16 parts of silicon dioxide, 0.08-0.1 part of epoxy chloropropane, 60-80 parts of dimethylformamide, 6-8 parts of bamboo fiber, 5-7 parts of algal polysaccharide, 5-6 parts of polypropylene resin emulsion, 0.3-0.4 part of lauryl sodium sulfate, 2-3 parts of epoxy castor oil, 3-5 parts of cedar wood oil, a right amount of 85% ethanol solution and a right amount of deionized water. The mulching film prepared by the invention is simple in production process, high in stability and good in film-forming property; and the mulching film can be completely degraded without any pollution, has no harm to the soil, can effectively prevent pests and diseases, reduces pesticide hazard to the soil and is worthy of popularization.

Description

technical field [0001] The invention relates to the technical field of agricultural mulch, in particular to a degradable starch-based agricultural mulch added with bamboo fiber. 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 h...

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.