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A composite humic acid sponge bionic soil matrix and its preparation method and application

A kind of humic acid and composite technology, applied in the direction of planting substrate, botanical equipment and methods, applications, etc., can solve the problems of difficult to promote plant root growth and nutrients, difficult to collect natural rainwater, difficult to meet the requirements, etc.

Active Publication Date: 2022-01-28
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, due to the weight, transportation and storage of plant growth substrates such as ordinary soil flowerpots and ceramsite flowerpots, it is difficult to meet the requirements in the construction of sponge city green walls and urban roof gardens. At the same time, it is difficult for such substrates to collect natural rainwater , to provide plants with longer water supply, but also difficult to promote plant root growth and nutrients, wasting resources

Method used

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  • A composite humic acid sponge bionic soil matrix and its preparation method and application
  • A composite humic acid sponge bionic soil matrix and its preparation method and application
  • A composite humic acid sponge bionic soil matrix and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 2

[0039] Under alkaline conditions, after dissolving 3 parts of humic acid in 30 parts of water, add 0.4 parts of zinc stearate and sodium dodecylbenzene sulfonate with a mass ratio of 1:1, at 65 °C at 500 r / After stirring at a speed of 30 min, the modified humic acid was obtained after suction filtration, water washing, and drying at 80°C.

[0040] 1 part of the modified humic acid solution with a mass concentration of 15% and 0.8 part of isophorone diisocyanate (IPDI) prepared from the above-mentioned modified humic acid were respectively weighed as foaming agents for later use. Add 6 parts of polytetrahydrofuran, 18 parts of N-methylpyrrolidone, 0.3 parts of dibutyltin dilaurate, 0.5 parts of trimethylolpropane and 0.8 parts of N-methyldiethanolamine into a dry three-necked flask, and place in a water bath at 65 °C Stir for 10 minutes to fully dissolve, turn on the stirring device and raise the temperature to 75°C at a rate of 2°C / min, drop in 4 parts of IPDI at a rate of 1 ...

Embodiment 3

[0042] Under alkaline conditions, after dissolving 3 parts of humic acid in 30 parts of water, add 0.4 parts of zinc stearate and sodium lauryl sulfate with a mass ratio of 1:1, at 60°C at 500r / min After stirring at a high speed for 30 minutes, the modified humic acid was obtained by suction filtration, washing with water, and drying at 80°C.

[0043] Weigh 2 parts of the modified humic acid solution with a mass concentration of 15% and 1 part of isophorone diisocyanate (IPDI) prepared from the above-mentioned modified humic acid as foaming agent for later use. Add 8 parts of polytetrahydrofuran, 20 parts of N-methylpyrrolidone, 0.4 parts of dibutyltin dilaurate, 0.7 parts of trimethylolpropane and 1 part of N-methyldiethanolamine into a dry three-necked flask, at 65 °C Stir in a water bath for 10 minutes to fully dissolve, turn on the stirring device and raise the temperature to 75°C at a rate of 3°C / min, drop in 5 parts of IPDI at a rate of 1 drop / s, stir for 2 hours until t...

Embodiment 4

[0045] Under alkaline conditions, dissolve 4 parts of humic acid in 40 parts of water, add 0.3 parts of sodium lauryl sulfate, stir at 500 r / min for 30 minutes at 65 ° C, then wash with suction and wash at 80 ° C The modified humic acid was obtained after drying under the lower temperature.

[0046] Weigh 2 parts of the modified humic acid solution with a mass concentration of 10% and 0.8 parts of IPDI prepared from the above-mentioned modified humic acid as foaming agents for later use. Add 5 parts of polytetrahydrofuran, 15 parts of N-methylpyrrolidone, 0.3 parts of dibutyltin dilaurate, 0.5 parts of trimethylolpropane and 0.8 parts of N-methyldiethanolamine into a dry three-necked flask, at 65 °C Stir in a water bath for 10 minutes to fully dissolve, turn on the stirring device and raise the temperature to 75°C at a rate of 2°C / min, drop in 5 parts of isophorone diisocyanate at a rate of 1 drop / s, and stir for 2 hours until the system becomes Pale yellow and slightly visco...

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Abstract

The invention discloses a composite humic acid sponge bionic soil matrix, a preparation method and application thereof, and belongs to the technical field of material preparation and environmental treatment. After mixing polyether polyol and N-methylpyrrolidone, under the action of catalyst, cross-linking agent and chain extender, after stirring in a water bath, isocyanate is added dropwise to obtain polyurethane emulsion. In the foaming stage of polyurethane sponge, humic acid and The composite humic acid sponge biomimetic soil matrix is ​​obtained. It has both the growth effect of humic acid on plants, the complexation and adsorption effect on pollutant ions, and the light water absorption effect of sponge. The method has the advantages of simple operation, readily available raw materials, low equipment requirements and low cost. The prepared product is light in weight, uniform in pores, high in water absorption and water retention rate, can effectively promote plant growth, purify water quality, and is safe and environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of material preparation and environmental treatment, and in particular relates to a composite humic acid sponge bionic soil substrate and its preparation method and application. Background technique [0002] In recent years, the concept of ecological sponge city has become the ultimate construction goal of urban development, but with the further acceleration of urbanization, urban green land has also become tense. At the same time, people's requirements for a healthy environment and building green vision are becoming increasingly strong , the vertical greening mode of the building wall came into being. Therefore, under the background of sponge city construction and roof garden city construction, an ultra-light substrate suitable for growing plants in various interfaces and spaces of the city has great significance for urban greening construction and solving roof load-bearing problems. [0003] At present, d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32C08J9/08A01G24/20A01G24/35A01G24/48
CPCC08G18/6677C08G18/4854C08G18/3206C08J9/08A01G24/20A01G24/35A01G24/48C08J2375/08C08J2203/02C08J2203/18
Inventor 牛育华宋洁王晨赵轩柯如媛窦玉芳韩星星
Owner SHAANXI UNIV OF SCI & TECH
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