Method for preparing urea formaldehyde foam powder for plant culture medium through one-step method

Abstract

The invention discloses a method for preparing urea formaldehyde foam powder for a plant culture medium through a one-step method and relates to a preparation method of plant cultivated culture medium. The urea formaldehyde foam powder for the plant culture medium is prepared by the following steps: preparing urea, a formaldehyde solution or paraformaldehyde solution into a mixed solution according to a proportion, adding a foaming agent and a curing agent, mixing uniformly, continuously stirring in the foaming process, and drying to obtain the urea formaldehyde foam powder after the urea formaldehyde resin forms a dispersed wet urea formaldehyde foam granule. The obtained powder is pollution-free, toxin-free and degradable, can be directly mixed with soil and can provide a rich nitrogen source for the plant; because the specific surface area of the foam is large and the water-absorption and water-retention properties are strong, the nutrient contents for each plant can be added so that the urea formaldehyde foam powder is very suitable for being used as a plant cultivated culture medium material in the agricultural field. The urea formaldehyde resin foam prepared by taking the urea-formaldehyde as the raw material through the one-step method can be widely used in the plant cultivation field.

Description

technical field [0001] The invention relates to a preparation method of a plant culture medium material, in particular to a method for preparing urea-formaldehyde foam powder used in a plant culture medium by a one-step method. Background technique [0002] Foam plastic is a kind of polymer material formed by a large number of gas micropores dispersed in solid plastic. Compared with pure plastic, foam plastic has low density, light weight and high specific strength. Its strength increases with the increase of density. It has the ability to absorb impact load, has excellent cushioning and shock absorption performance, sound insulation and sound absorption performance, low thermal conductivity, good heat insulation performance, excellent electrical insulation performance, and has corrosion resistance and mold resistance. Urea-formaldehyde foam is a kind of foam plastic, which is a kind of porous rigid foam plastic. It is mainly used as thermal insulation material and also ...

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Problems solved by technology

[0010] In summary, it can be seen that in the existing process of preparing urea-formaldehyde foam powder as a plant medium, the route is long and the process is complicated, and it is not cost-effective from an economic point of view. Therefore, the inherent characteristics of the reaction between urea and formaldehyde are used to achieve It is possible to prepare urea-formaldehyde foam powder for plant culture medium in one step