Urea-formaldehyde foam plant cultivation substrate and method for preparing the same

A technology of cultivation substrate and urea-formaldehyde foam, which is applied in the field of plant cultivation substrate and its preparation, can solve the problems of complicated process and high production cost, and achieve the effects of good water absorption, low cost and few varieties of raw materials

Active Publication Date: 2008-03-05
BEIJING ACADEMY OF AGRICULTURE & FORESTRY SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process for manufacturing the urea-formaldehyde foam plant cultivation substrate is complex, and the material components in the foam substrate are diverse, and contain chemical components that have indirect toxic effects on plant growth, and the production cost is relatively high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1, the preparation of urea-formaldehyde foam plant cultivation substrate and its effect detection

[0028] A commercially available formaldehyde solution with a concentration of 36%-38% is formulated into a formaldehyde solution with a concentration of 30%.

[0029] 1) Preparation of urea-formaldehyde resin solution

[0030] Weigh 843.6 grams of the above-mentioned 30% formaldehyde solution (about 785ml in volume) and add it into a three-necked bottle, start the mixer to stir fully, take a sample of the formaldehyde solution to measure its pH value, adjust the pH with 90 drops of 10% sodium hydroxide solution by mass percentage The value is between 6.4-6.7.

[0031] Weigh 210 grams of the first batch of urea, which is 75% of the total amount of 279.6 grams of urea added, and add it to a three-necked bottle, and add water at 20-30° C. to dissolve it. After the first batch of urea is completely dissolved, turn on the water bath heating furnace, and raise the ...

Embodiment 2

[0049] Embodiment 2, the preparation of urea-formaldehyde foam plant cultivation substrate and its effect detection

[0050] A commercially available formaldehyde solution with a concentration of 36%-38% is formulated into a formaldehyde solution with a concentration of 30%.

[0051] 1) Preparation of urea-formaldehyde resin solution

[0052] Add 60.25 kg of 29.83% formaldehyde into the reaction kettle, add 210 ml of 10% sodium hydroxide, adjust the pH to 6.7, start the stirrer, and add 15 kg of the first batch of urea at the same time. Start heating after the urea is completely dissolved, raise the internal temperature to 60°C within 40 minutes, continue heating, and then raise the internal temperature to 90°C after 60 minutes, keep the temperature at 90°C-94°C, and keep the temperature constant for 30 minutes. Measure the pH value, adjust the pH value between 5.8-6.5 with 10% sodium hydroxide solution, and determine its consumption according to actual needs.

[0053] Add t...

Embodiment 3

[0069] Embodiment 3, the effect detection of urea-formaldehyde foam plant cultivation substrate

[0070] Sprinkle high sheep's spear, corn and wheat seeds respectively on three urea-formaldehyde foam plant cultivation substrates provided by the present invention. At the same time, in the same cultivation environment, the seeds of tall sheep's spear, corn and wheat were sprinkled into the traditional soil cultivation substrate respectively. The surface of the seeds is covered with crushed substrate 0.5cm, watered thoroughly, and the emergence of the above-mentioned plant seeds in these two kinds of cultivation substrates is observed. The comparative data results of the emergence rate are shown in Table 3.

[0071] Table 3, use plant cultivation medium of the present invention and use the emergence rate comparison of the plant of traditional soil cultivation

[0072] Cultivation medium

[0073] As can be seen from Table 3, using the urea-formaldehyde foam plant cultiv...

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Abstract

The present invention discloses one kind of urea-formaldehyde foam as plant cultivating matrix and its preparation process. The urea-formaldehyde foam as plant cultivating matrix is prepared through the following steps: 1. mixing formaldehyde and urea to produce polycondensation reaction to obtain urea-formaldehyde resin solution; 2. mixing sodium butyl naphthalenesulfonate to obtain foaming liquid; 3. foaming the urea-formaldehyde resin solution with the foaming liquid in a foaming machine to obtain liquid foam; 4. solidifying the liquid foam and drying to operate foamed matrix; and 5. eliminating aldehyde group from the matrix to obtain urea-formaldehyde foam as plant cultivating matrix. The preparation process is simple and low in cost, and the prepared urea-formaldehyde foam as plant cultivating matrix has penetrating porous structure, high hydroscopicity and high soil-less culturing character.

Description

technical field [0001] The invention relates to a plant cultivation substrate and a preparation method thereof, in particular to a urea-formaldehyde foam plant cultivation substrate and a preparation method thereof. Background technique [0002] Soil is known as the most basic carrier of plant cultivation, but with the increasing shortage of land resources and the special cultivation requirements of plants, to some extent, the traditional cultivation substrate can no longer meet the needs of modern agricultural production. As the soilless cultivation product of alternative soil cultivation, people pay more and more attention to it, and relevant research reports are also increasing, such as CN1323514A (disclosure date is November 28, 2001) and CN1059819 (disclosure date is April, 1992) 1 day). Most of the soilless cultivation substrates adopted in these patents are composite carriers, mainly utilizing foamed plastics, sawdust, plant decay, etc. as the carriers of plant growt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G12/36C08J9/00A01G31/00C08K5/42C08K3/32
CPCY02P60/21
Inventor 谷佳林李亚星徐秋明杨宜斌衣文平
Owner BEIJING ACADEMY OF AGRICULTURE & FORESTRY SCIENCES
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