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Preparation method for cellulose fatty acid ester water-soluble chemical fertilizer microcapsule

A technology of fatty acid ester and cellulose ester, applied in urea compound fertilizer, nitrogen fertilizer, potash fertilizer and other directions, can solve the problems of increased intermolecular force of polymers, increased flow viscosity of polymers at high temperature, difficult processing and molding, etc., and achieves low molecular weight. , Control the release rate, the effect of lasting fertilization effect

Inactive Publication Date: 2017-07-14
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the molecular weight increases, the force between the polymer molecules also increases accordingly, so that the high-temperature flow viscosity of the polymer also increases, which brings certain difficulties to processing and molding.

Method used

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  • Preparation method for cellulose fatty acid ester water-soluble chemical fertilizer microcapsule
  • Preparation method for cellulose fatty acid ester water-soluble chemical fertilizer microcapsule

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A preparation method of cellulose fatty acid ester water-soluble chemical fertilizer microcapsules, comprising the steps of:

[0033] (1) first dissolve the water-soluble fertilizer in 15% gum arabic solution to obtain the water phase; the water-soluble fertilizer is urea; the mass-to-volume ratio of the water-soluble fertilizer to the 15% gum arabic solution is 1:10;

[0034] (2) Dissolving the mechanically activated cellulose ester in an organic solvent to obtain an oil phase; the mass volume ratio of the mechanically activated cellulose ester to the organic solvent is 1:5; the mechanically activated cellulose ester is mechanically activated Cellulose acetate butyrate; Described organic solvent is chloroform;

[0035] (3) Mix the water phase obtained in step (1) with the oil phase obtained in step (2), add a surfactant, stir, and make a microemulsion; the surfactant is Tween or Span, which The amount added is 5% of the mass of the water phase and the oil phase; the s...

Embodiment 2

[0039] A preparation method of cellulose fatty acid ester water-soluble chemical fertilizer microcapsules, comprising the steps of:

[0040] (1) earlier water-soluble fertilizer is dissolved in 15% gum arabic solution, obtains aqueous phase; Described water-soluble fertilizer is potassium chloride; The mass volume ratio of described water-soluble fertilizer and 15% gum arabic solution is 1: 20;

[0041] (2) Dissolving the mechanically activated cellulose ester in an organic solvent to obtain an oil phase; the mass volume ratio of the mechanically activated cellulose ester to the organic solvent is 1:20; the mechanically activated cellulose ester is mechanically activated Cellulose acetate n-octanoate; Described organic solvent is dichloromethane;

[0042] (3) Mix the water phase obtained in step (1) with the oil phase obtained in step (2), add a surfactant, stir, and make a microemulsion; the surfactant is Tween or Span, which The amount added is 20% of the mass of the water...

Embodiment 3

[0046] A preparation method of cellulose fatty acid ester water-soluble chemical fertilizer microcapsules, comprising the steps of:

[0047] (1) earlier water-soluble fertilizer is dissolved in 15% gum arabic solution, obtains water phase; Described water-soluble fertilizer is ammonium sulfate; The mass volume ratio of described water-soluble fertilizer and 15% gum arabic solution is 1:15 ;

[0048] (2) Dissolving the mechanically activated cellulose ester in an organic solvent to obtain an oil phase; the mass volume ratio of the mechanically activated cellulose ester to the organic solvent is 1:10; the mechanically activated cellulose ester is mechanically activated Cellulose acetate laurate; Described organic solvent is chloroform;

[0049] (3) Mix the water phase obtained in step (1) with the oil phase obtained in step (2), add a surfactant, stir, and make a microemulsion; the surfactant is Tween or Span, which The amount added is 10% of the mass of the water phase and th...

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Abstract

A preparation method for a cellulose fatty acid ester water-soluble chemical fertilizer microcapsule includes the steps of: (1) dissolving a water-soluble fertilizer in Arabic gum solution to obtain a water phase; (2) dissolving mechanically activated cellulose ester in an organic solvent to obtain an oil phase; (3) mixing the water phase in the step (1) and the oil phase in the step (2), adding a surfactant, and stirring the mixture to prepare a micro-emulsion; (4) at constant rotation speed, uniformly dropwise adding the micro-emulsion to a 2% polyvinyl alcohol solution, and stirring the mixture at room temperature and stepwise increasing the temperature; and (5) continuously stirring the mixture for 40-60 min, stopping stirring, performing suction filtration and drying the filter residue to obtain the cellulose fatty acid ester water-soluble chemical fertilizer microcapsule. The cellulose fatty acid ester water-soluble chemical fertilizer microcapsule can effectively prevent loss of nutrients, controls releasing speed of the water-soluble chemical fertilizer well and increases utilization rate of the fertilizer, thereby reducing frequency of fertilization and prolonging effective period.

Description

technical field [0001] The invention belongs to the technical field of research and development of agricultural fertilizers, and in particular relates to a preparation method of cellulose fatty acid ester water-soluble fertilizer microcapsules. Background technique [0002] Water-soluble fertilizer (Water Soluble Fertilizer, referred to as WSF) is a multi-component compound fertilizer that can be completely dissolved in water. It can be quickly dissolved in water, more easily absorbed by crops, and its absorption and utilization rate is relatively high. Water-soluble fertilizers have higher nutrient content than ordinary compound fertilizers, and the dosage is relatively small. Direct flushing can easily cause burnt seedlings, root damage, and weak seedlings. The most important principle of fertilization is in line with the characteristics of continuous nutrient absorption by plant roots, and reduces the leaching loss caused by one-time large-scale fertilization. Therefore,...

Claims

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Application Information

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IPC IPC(8): C05G5/00C05G3/00
CPCC05C3/00C05C9/00C05D1/02C05G3/00C05G5/35
Inventor 黄爱民李大玉胡华宇张燕娟杨梅黄祖强覃宇奔沈芳覃杏珍伍娟冯振飞
Owner GUANGXI UNIV
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