A kind of preparation method of seed coating agent

Abstract

A method for preparing a seed coating agent comprises the following steps that (1) corn straw is pre-processed; (2) an acrylate solution is prepared; (3) the seed coating agent is prepared, wherein an initiator of potassium persulfate and a crosslinking agent of N,N'-methylene bisacrylamide are added into water and dissolved and then are mixed with the stand-by acrylate solution obtained in the step (2), the obtained mixture is stirred evenly, then N,N,N',N'- tetramethyl ethylenediamine aqueous solution with the concentration of 0.198mol / L is added into the mixture, then the mixture is evenly stirred, after air bubbles of a system disappear, the stand-by corn straw pre-processed in the step (1) is added, the mixture is stirred evenly and then the seed coating agent is prepared. The method does not require heating and can be conducted under a normal temperature condition, raw materials are low in price and easy to obtain, the production cost is low, the process is simple, and the method is convenient to operate and suitable for being used for large-scale industrial production. Experiments prove that the water absorption amount of the seed coating agent can be forty times of the mass of the materials comprising seeds at most.

Description

technical field [0001] The invention relates to a preparation method of a seed coating agent, in particular to a preparation method of a seed coating agent with corn stalks and polymers as the matrix. Background technique [0002] Among the countries in the world, my country is one of the countries with the most water shortages. Drought and water shortage are important factors restricting the sustainable development of my country's agriculture. Implementing high-efficiency and water-saving agriculture is the only way for my country's sustainable development. Water-retaining agent is a new type of functional polymer energy-saving material, which contains a large number of strong water-absorbing groups with specific structures, which can absorb pure water several times or even thousands of times its own mass. The water-retaining agent is non-toxic and harmless, and can release and absorb water repeatedly. Therefore, people in agriculture compare it to a "miniature reservoir". ...

AI Technical Summary

Problems solved by technology

In polyacrylate, if the polymer monomer is sodium type, long-term use will increase the content of sodium ions in the soil, making the soil harden, which is not good for plants

(2) Cellulose, the main component is hydroxymethyl cellulose cross-linked body, this type of water absorption rate is low, due to technical problems, it is difficult to realize industrial production

For example, the prior art CN201210528797.3 discloses a method for preparing an agricultural composite water-retaining agent. This invention uses natural organic polymer starch and crop straw as raw materials, and has the advantages of starch and cellulose-based water-retaining agents. In the process, the flour and pretreated straw powder need to be heated to 80-95°C, gelatinized for 30-60 minutes, and then cooled to 60-70°C. The reaction steps are cumbersome and cannot be produced at room temperature. , needs to consume a large amount of food crops, which affects food security to a certain extent and makes the production cost higher

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