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A water-resistant and degradable plant nutrient slow-release material and its preparation method

A slow-release material and nutrient technology, applied in organic fertilizers, fertilizer mixtures, agriculture, etc., can solve the problems of multiple fertilization and nutrient loss, and achieve the effects of easy degradation, load reduction, and industrialized large-scale production

Active Publication Date: 2019-04-05
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of low utilization rate of traditional fertilizers, need for multiple fertilization, serious environmental pollution caused by a large amount of nutrient loss, etc., the present invention provides a water-resistant and degradable plant nutrient slow-release material and a preparation method thereof, aiming at avoiding the trouble of manual fertilization and improving Fertilizer utilization rate, increasing surface vegetation coverage, reducing environmental pollution

Method used

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  • A water-resistant and degradable plant nutrient slow-release material and its preparation method
  • A water-resistant and degradable plant nutrient slow-release material and its preparation method
  • A water-resistant and degradable plant nutrient slow-release material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The water-resistant degradable plant nutrient sustained-release material of this embodiment is prepared as follows:

[0034] (1) Weigh 20 g of corn starch into 5 g of distilled water, then add 12 g of citric acid and 8 g of glycerin, stir evenly and then stand for 24 hours to obtain modified corn starch.

[0035] Add 45 g of modified corn starch to 10 mL of distilled water to prepare a starch solution; put the starch solution in a three-necked flask and stir while heating at 95°C for 0.5 h to obtain gelatinized starch;

[0036] Weigh 5 g of PVA, add 1.25 g of distilled water, heat to dissolve at 97°C, and cool the resulting solution to 80°C to prepare a PVA solution.

[0037] Add the PVA solution to the gelatinized starch, and then stir while heating at 95°C for 0.5h, and the resulting product is cooled to below 80°C to obtain the binder;

[0038] (2) Measure 2mL of glacial acetic acid in a 100mL volumetric flask, dilute with distilled water to make the volume; add 2g of chitosan...

Embodiment 2

[0045] In this example, the nutritional sustained-release material was prepared in the same manner as in Example 1, except that the volume of the porogen DBP in step (3) was 12 mL.

[0046] The scanning electron micrograph of the porous composite microspheres obtained in this example is as follows figure 1 (b) Shown.

Embodiment 3

[0048] In this example, the nutritional sustained-release material was prepared in the same manner as in Example 1, except that the volume of the porogen DBP in step (3) was 16 mL.

[0049] The scanning electron micrograph of the porous composite microspheres obtained in this example is as follows figure 1 (c) and figure 2 (a) Shown.

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Abstract

The invention discloses a waterproof degradable plant-nutrient slow-release material and a preparing method thereof. The waterproof degradable plant-nutrient slow-release material is prepared from modified corn flour, a PVA solution, a chitosan acetic acid solution, a zinc-humic acid compound fertilizer, oil-phase emulsion, a crosslinking agent glutaraldehyde and waste straw. The nutrient slow-release material has the waterproof function, the degradable function, the slow-release function and the like, is free of pollution, low in cost, simple in production technology, convenient to operate, small in equipment investment, capable of bringing convenience to industrial large-scale production and broad in market prospect.

Description

Technical field [0001] The invention relates to a new water-resistant and degradable nutrient material and a preparation method thereof, and belongs to the field of landscaping. Background technique [0002] Chitin is widely present in the crustaceans of shrimps, crabs and other crustaceans, the cell walls of mushrooms and other fungi, and the organs of molluscs such as squid. It is 2-acetamide-2-deoxy-D-glucose through β-1 , The linear polysaccharide formed by 4 glycoside chains is a new type of natural biopolymer material that has emerged in recent years. After removing the acetyl group, chitin becomes chitosan, which is the most important and widely used derivative of chitin. It is non-toxic, tasteless, heat-resistant, alkali-resistant, corrosion-resistant, biodegradable and unique in physiology. The characteristics have attracted great attention. At present, its development, research and utilization in many fields such as pharmaceutical industry, food industry, water treatm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00
CPCC05F11/00C05G3/00C05G1/00
Inventor 刘雪霆王幸李孙峰
Owner HEFEI UNIV OF TECH
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