Preparation method of liquid covering material for agricultural purposes

Abstract

The invention relates to a preparation method of a liquid covering material for agricultural purposes. The method comprises: mixing 0.01-20?parts of polyethylene glycol, 0.01-10?parts of diacid, 0.01-10?parts of diol, and 0.01-1 part of a catalyst by mole ratio, and subjecting the mixture to a stirring reaction in an oil bath of 50DEG C-250DEG C so as to obtain a compound; by mass, taking 0.1-10 parts of the compound, adding 0.1-20 parts of water soluble cellulose, 0.1-10 parts of a membrane-forming agent, 0.1-10 parts of a surfactant, 0.2-10 parts of a plasticizer, 0.1-10 parts of a wet strength agent, 0.05-5 parts of a stabilizer, 0.1-10 parts of a crosslinking agent and 100-1000 parts of water, and subjecting the mixture to a stirring reaction at 30DEG C-100DEG ; then reducing the pressure to remove foams, and conducting cooling to room temperature; and adding water to perform dilution, and carrying out filtration, thus obtaining the liquid covering material. The liquid covering material for agricultural purposes prepared in the invention can disperse or dissolve in water, can coagulate into a membrane after being sprayed in soil and can achieve a good effect. The prepared material has the characteristics of low economic cost, no residue, no toxicity and harmlessness.

Description

technical field [0001] The invention belongs to the technical field of polymer liquid material production, and in particular relates to a preparation method of an agricultural liquid covering material. Background technique [0002] Agricultural liquid mulch, also known as liquid mulch, is a new type of composite material that has a certain viscosity and can form a colloidal film after spraying. It has good water retention capacity, temperature increase and moisture retention, and is biodegradable. The product can be used as organic The use of fertilizer can improve soil composition, improve soil nutrition, increase the stress resistance of crops, have no harmful effects on soil, groundwater quality and environment, and can prevent insects and weeds, and have a certain promotion effect on crop growth. Due to its non-toxic Environmentally friendly, it can improve soil structure, promote crop growth, improve crop quality and yield, so it can be used as a new material to replace...

AI Technical Summary

Problems solved by technology

[0003] Natural polymers such as cellulose, starch, lignin and other raw materials are easy to obtain and cheap, and most of them contain hydrophilic groups such as hydroxyl and carboxyl groups, which are easy to disperse in water, easy to apply, and the effect is good; but when used alone, the film-forming effect Poor, mechanical properties and mechanical strength properties need to be strengthened

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