Degradable seedling culture container, and preparation method and application thereof

A seedling raising container and quality technology, applied in the field of degradable seedling raising container and preparation thereof

Active Publication Date: 2012-06-20
JIANGSU ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011]The purpose of the present invention is: for the processing and production of biodegradable seedling containers such as crop stalks and forest product processing waste, there is a lack of suitable adhesives, and the processing and production are difficult Large, low yield, or insufficient water resistance of the adhesive (such as gelatinized starch glue), the container is easy to disintegrate when exposed to water, or the adhesive has poor degradation performance (such as urea-formaldehyde resin glue), and the container is difficult to disintegrate in a short time, making it difficult for the root system to penetrate , or the high salinity of the adhesive (alkali gelatinized starch glue, sodium hypochlorite oxidized starch glue, etc.) affects the root growth of plant seedlings, etc., to provide a new type of biodegradable seedling container special adhesive production and application method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Get 600kg of potato starch and 1400kg of water, add them together in the reactor, turn on the stirrer, and stir at 60 rpm. After 10 minutes, the heating device was turned on, and the starch suspension in the reaction kettle was heated in a water bath, and the temperature rise rate was controlled at about 2°C / min. Pour 20kg of 30% hydrogen peroxide solution (6kg of hydrogen peroxide) into the liquid feed container on the reactor. When the temperature rises to 35°C, open the hydrogen peroxide solution drip valve, and add the hydrogen peroxide solution dropwise at an even rate, with the dropping rate controlled at about 0.8kg / min. Observe the rate of temperature rise, and adjust the drop rate of hydrogen peroxide solution at any time. When the temperature rises to 85°C, add all the hydrogen peroxide solution, and keep warm at 85°C for 30 minutes. After 30 minutes of heat preservation, add 60kg of pre-dissolved 10% polyvinyl alcohol aqueous solution with a degree of alcoh...

Embodiment 2

[0044] Get wheat starch 700kg, water 1300kg, in the reaction kettle that adds together, open stirrer, stir with 80 rpm. After 10 minutes, turn on the heating device, and heat the starch suspension in the reaction kettle in a water bath, and control the temperature rise rate at about 1°C / min. Pour 35kg of 30% hydrogen peroxide solution (10.5kg of hydrogen peroxide) into the liquid feed container on the reactor. When the temperature rises to 35°C, open the hydrogen peroxide solution drip valve, and add the hydrogen peroxide solution dropwise at an even rate, with the dropping rate controlled at about 1.4 kg / min. Observe the rate of temperature rise, and adjust the drop rate of hydrogen peroxide solution at any time. When the temperature rises to 85°C, add all the hydrogen peroxide solution, and keep warm at 85°C for 40 minutes. After 40 minutes of heat preservation, add 100kg of pre-dissolved 14% polyvinyl alcohol aqueous solution with a degree of alcoholysis of 90%, 28kg of u...

Embodiment 3

[0049] Take 800kg of cornstarch and 1200kg of water, add them together to the reaction kettle, turn on the stirrer, and stir at 120 rpm. After 10 minutes, the heating device was turned on, and the starch suspension in the reaction kettle was heated in a water bath, and the temperature rise rate was controlled at about 3°C / min. Pour 45.7kg of 35% hydrogen peroxide solution (approximately 16kg of hydrogen peroxide) into the liquid feed container on the reactor. When the temperature rises to 35°C, open the hydrogen peroxide solution drip valve, and add the hydrogen peroxide solution dropwise at an even rate, with the dropping rate controlled at about 1.83 kg / min. Observe the rate of temperature rise, and adjust the drop rate of hydrogen peroxide solution at any time. When the temperature rises to 85°C, add all the hydrogen peroxide solution, and keep warm at 85°C for 60 minutes. After 60 minutes of heat preservation, add 200kg of pre-dissolved 12% polyvinyl alcohol aqueous solu...

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Abstract

The invention relates to a degradable seedling culture container, and a preparation method and application thereof. The seedling culture container comprises preparation raw materials consisting of adhesive, a biomass powder material and a cross-linking agent and is characterized in that the adhesive is unsalted modified oxidized starch adhesive formed through formulation by taking plant starch asa base material, taking hydrogen peroxide as an oxidizer and taking an urea resin prepolymer and polyvinyl alcohol as modifiers; the plant starch is wheat starch or corn starch or potato starch; the biomass powder material is rice hull powder or straw powder or saw dust powder or other agricultural and forestry waste powder; and the cross-linking agent is low molecular polyamide. The preparation method of the seedling culture container comprises the following steps of: after oxidizing the plant starch through the oxidizer, modifying the plant starch through the modifiers to form the adhesive;and adding the adhesive and the cross-linking agent into the biomass powder material, and obtaining the degradable seedling culture container after stirring, dehydrating, moulding and forming. The degradable seedling culture container disclosed by the invention can be synchronously transplanted with seedlings after a seedling breeding period.

Description

Technical field: [0001] The invention relates to a seedling-raising container and its preparation method and application, in particular to a degradable seedling-raising container using salt-free modified oxidized starch glue and its preparation method and application. technical background: [0002] In recent years, with the increasing pressure on resources and environment and the improvement of public environmental awareness, biodegradable products are gradually becoming the new darling of the market, especially the rapid development of organic, green and ecological agriculture has greatly increased the demand for agricultural environment-friendly inputs, while the domestic market Environmentally friendly and degradable agricultural container products are almost blank. At present, the total annual vegetable container seedlings in my country are about 300 billion, forestry greening seedlings are about 25 billion, flower seedlings are about 3 billion, and more than 90% of dome...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08L3/10C08L77/00C08L29/04C08L61/24C08B31/18A01G9/10
Inventor 黄红英常志州唐双凌叶小梅马艳
Owner JIANGSU ACAD OF AGRI SCI
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