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Recyclable self-repairing elastic bio-based coating material and preparation method thereof

A coating material and bio-based technology, applied in layered/coated fertilizers, fertilizer mixtures, agriculture, etc., to achieve high mechanical properties, simple preparation process, and improved controlled release effect

Active Publication Date: 2021-09-03
SHANDONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bio-based coating material of the present invention can be applied to a variety of different types of bio-based coated controlled-release fertilizers, and the dynamic covalent bond self-repairing technology solves the problem of holes and cracks that are prone to occur during the production and use of slow-controlled release fertilizers. problem of interpretation

Method used

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  • Recyclable self-repairing elastic bio-based coating material and preparation method thereof
  • Recyclable self-repairing elastic bio-based coating material and preparation method thereof
  • Recyclable self-repairing elastic bio-based coating material and preparation method thereof

Examples

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preparation example Construction

[0039] The preparation method of the magnetic nanocellulose is as follows: specifically, fully disperse 1-2g of hydroxypropyl methylcellulose in 20mL of hot water, stir to make the added product swell completely, and then add 80mL of cold water, Stir until the water temperature is below room temperature, then dissolve the hydroxypropyl methylcellulose in water, then add 0.1-0.5g of mesoporous nano-iron oxide powder, oscillate ultrasonically for 10 hours, and take out the hydroxypropyl methylcellulose-mesoporous The nano-iron oxide composite material is washed and dried to obtain magnetic nano-cellulose.

[0040] The magnetic nanocellulose prepared by the method of the present invention has good compatibility with the bio-based coating material, and can be uniformly dispersed in the bio-based coating material, and the dispersion is even, so the bio-based coating material can be easily passed through the magnetic field. for recycling ( figure 2 ).

[0041] The dynamic modific...

Embodiment 1

[0052] In this example, a recyclable self-healing elastic bio-based polyurethane coating material is prepared by introducing dynamic oxime urethane bonds, hydrogen bonds, and calcium coordination bonds into the bio-based polyurethane coating material, and a coating material is provided. Layer recyclable self-healing elastic bio-based polyurethane coated controlled-release fertilizer. The preparation method is as follows:

[0053] (1) Fully disperse 1g of hydroxypropyl methylcellulose in 20mL of hot water, stir to make the added product swell completely, then add 80mL of cold water, and stir until the water temperature is below room temperature, the hydroxypropyl methylcellulose can be made Dissolve methylcellulose in water, then add 0.1g of mesoporous nano-iron oxide powder, and after ultrasonic stirring for 10 h, take out the hydroxypropyl methylcellulose-mesoporous nano-iron oxide composite material and wash it twice with deionized water, and then in 60 The magnetic nanocel...

Embodiment 2

[0058] In this example, a recyclable self-healing elastic bio-based epoxy resin coating material is prepared by introducing dynamic borate bonds, hydrogen bonds, and magnesium coordination bonds into the bio-based epoxy resin coating material, and provides A coated recyclable self-healing elastic bio-based epoxy-coated controlled-release fertilizer. The preparation method is as follows:

[0059] (1) Fully disperse 1.5g of hydroxypropyl methylcellulose in 20mL of hot water, stir to make the added product swell completely, then add 80mL of cold water, and stir until the water temperature is below room temperature, then the hydroxypropyl methylcellulose can be made Dissolve hydroxypropyl methylcellulose in water, then add 0.2g of mesoporous nano-iron oxide powder, and after ultrasonic stirring for 10 h, take out the hydroxypropyl methylcellulose-mesoporous nano-iron oxide composite material and wash it twice with deionized water, and then in Vacuum drying at 60°C for 24 hours pr...

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Abstract

The invention discloses a recyclable self-repairing elastic bio-based coating material and a preparation method thereof. The recoverable self-repairing elastic bio-based coating material is prepared from the following raw materials in parts by weight: 100 parts of bio-based resin, 5-20 parts of a dynamic modifying material and 0.1-0.3 part of magnetic nano cellulose. The bio-based coating material disclosed by the invention can be applied to various different types of bio-based coated controlled-release fertilizers, and the problem that the controlled-release effect is influenced by holes and cracks which are easily generated in the production and use processes of the controlled-release fertilizers is solved through a dynamic covalent bond self-repairing technology. Meanwhile, the preparation process is simple, the production cost is low, the controlled-release fertilizer coating can be recycled, the production cost of the controlled-release fertilizer is reduced, the waste of resources is avoided, and the pollution to the environment is reduced.

Description

technical field [0001] The invention relates to the technical field of controlled-release fertilizer production, in particular to a recyclable self-repairing elastic bio-based coating material and a preparation method thereof. Background technique [0002] Chemical fertilizer is the most basic and important material input in agricultural production activities. In my country, a large amount of chemical fertilizer is applied to agricultural production every year, which greatly improves soil fertility and crop yield. However, its unreasonable application methods and low nutrient utilization efficiency will not only waste more fertilizer resources, but also cause a series of problems such as soil degradation and environmental pollution. The slow and controlled release fertilizer prepared by wrapping a layer of polymer waterproof polymer film on the surface of the fertilizer can slowly release the nutrients of the fertilizer to the outside world, which is an important technical w...

Claims

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Application Information

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IPC IPC(8): C05G3/40C05G5/30
CPCC05G3/40C05G5/37C05G5/38
Inventor 杨越超于震程冬冬姚媛媛张淑刚解加卓
Owner SHANDONG AGRICULTURAL UNIVERSITY
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