Biological degradation liquid film and preparation method

Abstract

The invention belongs to a biodegradation liquid mulching film and the preparation method thereof. The invention prepares polyvinyl alcohol into an aqueous solution with mass fraction of 5-10 percent; carboxymethyl cellulose is also prepared into an aqueous solution with mass fraction of 5-10 percent; starch with mass fraction of 5-10 percent is added into a reactor having an agitator, a condenser and a thermometer and is gelatinized for 30 minutes under 75-85 DEG C and then becomes transparent and slabby starch paste, the prepared polyvinyl alcohol solution and carboxymethyl cellulose solution are then added into the reactor, and surfactant and plasticizer are also added into the solution. The PH value is set as 2-4, cross-linking agent is then added, and the biodegradation liquid mulching film is obtained after 1-2-hour reaction under 85-90 DEG C. The film can be sprayed to the land surface through spray method after being thinned up.

Description

technical field [0001] The invention relates to a biodegradable liquid mulch film and a preparation method thereof, belonging to the technical field of preparation of polymer materials. Background technique [0002] Drought and water shortage are a worldwide problem, and the efficient use of water resources is the key technology for the sustainable development of agriculture in the 21st century. The scientific circles at home and abroad have carried out and are conducting arduous explorations on water-saving technology in theory and practice. At the same time, land desertification also seriously affects economic development, and is a common issue faced by all countries in the world in environmental protection. my country's land degradation, an average of 2100 square kilometers of newly added desertified land every year, seriously affects and restricts the further development of my country's national economy. Soil desertification in Northwest my country is becoming more and...

AI Technical Summary

Problems solved by technology

[0003] The use of plastic film cultivation technology has become one of the top ten agricultural technologies well known in the last century. The application of plastic film can meet the needs of crops for heat preservation, moisture conservation, and fertility to increase production and income. It has brought certain benefits to the growth and high yield of crops, but plastic The mulch film is a plastic film made of polyethylene or polystyrene by a blow molding machine. It mainly has the following disadvantages: 1. The raw material is difficult to decompose, causing great environmental pollution; 2. The adhesion between the film and the soil is insufficient and the adhesion is poor; 3. , Manual rupture of the membrane is required, which is labor-intensive and time-consuming; 4. The cost is relatively high

Chinese patent, application number 98107594 discloses titled "a kind of liquid mulch and its preparation method", the raw material of the liquid mulch prepared by this method has a large amount of asphalt, after using this liquid mulch, it is easy to cause secondary damage to the environment. Pollution, and high cost, difficult to promote