Degradable biological starch film capable of being repeatedly used

Abstract

The invention discloses a degradable biological starch film capable of being repeatedly used. The degradable biological starch film is prepared from the following raw materials in parts by weight: 64 to 70 parts of dry basis corn starch, 23 to 26 parts of ethyl alcohol, 11 to 15 parts of monochloroacetic acid, 14 to 16 parts of silicon dioxide, 0.08 to 0.1 part of epoxy chloropropane, 60 to 80 parts of dimethylformamide, 3 to 4 parts of laminarin, 2 to 4 parts of glycerin, 4 to 6 parts of tributyl citrate, 0.2 to 0.3 part of antioxidants 1010, 6 to 8 parts of polyving akohol, a proper amount of 85-percent ethanol solution and a proper amount of deionized water. The prepared starch film has the full degradation performance; the environment pollution caused by conventional plastics can be avoided; no hard is caused on soil; green and environment-friendly effects are achieved; the preparation process is simple; the cost is low; the degradable biological starch film is worthy of being popularized.

Description

technical field [0001] The invention relates to the technical field of agricultural mulching films, in particular to a reusable and degradable biological starch film. 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 has a wide r...

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.