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Composite fulvic acid antibacterial sponge matrix and preparation method and application thereof

A fulvic acid and composite technology, which is applied to the composite fulvic acid antibacterial sponge matrix and the field of preparation thereof, can solve the problems of decreased greening rate, rotten roots of plants, increased production cost, etc. The effect of promoting crop growth and improving stress resistance

Active Publication Date: 2020-04-21
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, people pay great attention to the beauty and comfort of the ecological environment. Therefore, with the concept of sponge ecological city construction, various urban greening methods emerge in endlessly. However, due to the low green area available in urban space, there is no one It is suitable for growing plants on various interfaces of the city and can collect a large amount of rainwater to maintain a long-lasting moisture matrix
Moreover, the sponge matrix used in some small plant factories is soaked in water for a long time, and the contact with the plant root system is prone to produce plant rotten roots, matrix mildew, etc., resulting in increased production costs, decreased greening rate, and loss of human and financial resources.

Method used

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  • Composite fulvic acid antibacterial sponge matrix and preparation method and application thereof
  • Composite fulvic acid antibacterial sponge matrix and preparation method and application thereof
  • Composite fulvic acid antibacterial sponge matrix and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 3 parts of 10% fulvic acid solution, 6 parts of acrylic acid with a neutralization degree of 50%, and 2 parts of antibacterial natural macromolecular chitosan solution, add them to a three-necked flask with a water bath temperature of 50°C, stir to fully dissolve, Continue to stir at a speed of 300r / min and raise the temperature to 70°C at a speed of 2°C / min. At the same time, dropwise add 7 parts of an aqueous solution containing 0.5 parts of potassium persulfate and 0.2 parts of KH550 dissolved in advance at a speed of 1 drop / s. After reacting for 2 hours, it was dried and crushed into fulvic acid water-retaining agent particles with a particle size of less than 1mm. In addition, 5 parts of polytetrahydrofuran and 15 parts of N-methylpyrrolidone were weighed and mixed, and then 0.3 part of dibutyltin dilaurate, 0.5 part of trimethylolpropane, and 0.5 part of N-methyldiethanolamine were added to a dry three-necked flask. Heat and stir in a water bath at 65°C for ...

Embodiment 2

[0035] Take by weighing 4 parts of 12% fulvic acid solution, 7 parts of acrylic acid with a neutralization degree of 50%, 2 parts of chitosan as a natural antibacterial macromolecule, add to a three-necked flask with a water bath temperature of 50 ° C, and continue to use 300 r / Stir at a speed of 1 min and heat up to 70 °C at a speed of 2 °C / min. At the same time, dropwise add 8 parts of an aqueous solution containing 0.6 parts of potassium persulfate and 0.2 parts of KH550 dissolved in advance at a speed of 1 drop / s, and react for 1.5 hours. Fulvic acid water-retaining agent particles that are crushed into particles with a particle size of less than 1 mm are dried. Weigh 6 parts of polytetrahydrofuran, 15 parts of N-methylpyrrolidone, 0.3 parts of dibutyltin dilaurate, 0.5 parts of trimethylolpropane, and 0.6 parts of chain extender into a dry three-necked flask, and heat it in a water bath at 65°C Stir for 10 minutes to fully dissolve, start the stirring device to stir at ...

Embodiment 3

[0037] Weigh 6 parts of 15% fulvic acid solution, 10 parts of acrylic acid with a neutralization degree of 40%, 4 parts of chitosan, peanut shell extract, and coconut shell extract concentrate antibacterial in a mass ratio of 2:1:1 Add the natural macromolecules into a three-necked flask with a water bath temperature of 55°C, stir to fully dissolve, continue to stir at a speed of 400r / min and raise the temperature to 75°C at a speed of 2°C / min, and drop at a speed of 1 drop / s Add 8 parts of pre-dissolved aqueous solution containing 0.5 parts of potassium persulfate and 0.3 parts of KH550, react for 1.5 hours, dry and pulverize into fulvic acid water retaining agent particles with a particle size of less than 1 mm. In addition, 6 parts of polytetrahydrofuran and 18 parts of N-methylpyrrolidone were weighed and mixed, and then 0.5 part of dibutyltin dilaurate, 0.6 part of trimethylolpropane, and 0.8 part of N-methyldiethanolamine were added to a dry three-necked flask. Heat and ...

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Abstract

The invention discloses a composite fulvic acid antibacterial sponge matrix and a preparation method and application thereof, belonging to the technical field of material preparation and environmentalgovernance. The preparation method comprises the following steps: polymerizing fulvic acid, acrylic acid and antibacterial natural macromolecules under the conditions of an initiator and a cross-linking agent to obtain a fulvic acid water-retaining agent, polymerizing polytetrahydrofuran with isocyanate, N-methylpyrrolidone, a catalyst, a cross-linking agent and the like to form a polyurethane emulsion, and compounding the polyurethane emulsion with the fulvic acid water-retaining agent to obtain the composite fulvic acid antibacterial sponge matrix. Components contained in the water-retaining fulvic acid composite antibacterial sponge matrix are environment-friendly materials and are non-toxic; and the porous structure of the sponge matrix and a large number of hydrophilic groups such asacrylic acid and polyurethane endow the sponge matrix with good water storage capacity, and rainwater can be effectively stored in the sponge matrix and purified. Antibacterial macromolecules are added to prevent the sponge from mildewing, root rotting and the like due to long-term contact with water, so the sponge matrix can be widely applied as a soilless culture substrate in sponge city construction.

Description

technical field [0001] The invention belongs to the technical field of material preparation and environmental treatment, and in particular relates to a composite fulvic acid antibacterial sponge matrix and its preparation method and application. Background technique [0002] At present, people pay great attention to the beauty and comfort of the ecological environment. Therefore, with the concept of sponge ecological city construction, various urban greening methods emerge in endlessly. However, due to the low green area available in urban space, there is no one It is suitable for growing plants on various interfaces of the city and can collect a large amount of rainwater to maintain a long-lasting moisture matrix. Moreover, the sponge matrix used in some small plant factories is soaked in water for a long time, and the contact with the plant root system is prone to produce plant rotten roots, matrix mildew, etc., resulting in increased production costs, decreased greening r...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/75C08G18/63C08G18/66C08G18/48C08G18/32C08F251/00C08F289/00C08F220/06C08F283/04C08G101/00
CPCC08G18/7671C08G18/755C08G18/63C08G18/667C08G18/6688C08G18/4854C08G18/3206C08G18/3275C08F251/00C08F289/00C08F283/04C08G2110/0083C08F220/06
Inventor 牛育华柯如媛王晨赵轩宋洁窦玉芳韩星星
Owner SHAANXI UNIV OF SCI & TECH
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