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Environmental protection type slow-release fertilizer coating material preparation method

An environmentally friendly, coating material technology, applied in fertilizer mixtures, fertilization devices, agriculture, etc., can solve problems such as degradable slow-release fertilizer coating materials that have not yet been seen, and achieve good toughness and buried soil degradability, The effect of stable response and simple process

Active Publication Date: 2016-02-03
HAINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, there have been no relevant reports at home and abroad on the use of natural rubber for modification to prepare degradable slow-release fertilizer coating materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 21g of 1.5% Pingping O to 97.31g of natural rubber clear, stir slowly for 0.5h to obtain stable natural rubber clear, dilute 15.75g of tapioca starch with 141.75g ​​of distilled water, paste, and place in a 90°C water bath gelatinized in medium for 1 hour, then cooled the gelatinized starch to room temperature, added 0.14 g of potassium persulfate, mixed evenly, placed in a 60°C water bath and continued to stir for 45 minutes to obtain modified starch. Add the stable natural rubber serum to the modified starch and mix quickly, stir in a water bath at 60°C for 3 hours, then add 0.21g sodium hexametaphosphate and 0.05g hydrogen peroxide and stir for 2 hours, cool to room temperature, filter, The starch-grafted modified natural skim emulsion is obtained, which is an environment-friendly slow-release fertilizer coating material.

[0023] Performance test: directly dry the starch-modified natural skim emulsion on a polytetrafluoroethylene board to form a film, and its el...

Embodiment 2

[0026] Add 21g of 1.5% Pingping O to 330.86g of natural rubber clear, stir slowly for 0.5h to obtain stable natural rubber clear, dilute 3.15g of tapioca starch with 28.35g of distilled water, paste, and place in a 90°C water bath gelatinized in medium for 1 hour, then cooled the gelatinized starch to room temperature, added 0.14 g of ammonium persulfate, mixed uniformly, placed in a 60°C water bath and continued to stir for 45 minutes to obtain modified starch. Add the stable natural rubber clear to the modified starch and mix quickly, stir in a water bath at 60°C for 3 hours, then add 0.11g epichlorohydrin and 0.05g potassium persulfate and stir for 2 hours, cool to room temperature, filter, The starch-grafted modified natural skim emulsion is obtained, which is an environment-friendly slow-release fertilizer coating material.

[0027] Performance test: Directly dry starch-modified natural skim emulsion on a polytetrafluoroethylene board to form a film, and its elongation at...

Embodiment 3

[0030] Add 21g of 1.5% Pingping O to 233.55g of natural rubber clear, stir slowly for 0.5h to obtain stable natural rubber clear, dilute 8.40g of tapioca starch with 75.60g of distilled water, paste, and place in a 90°C water bath gelatinized in medium for 1 h, then cooled the gelatinized starch to room temperature, added 0.20 g of potassium persulfate, mixed evenly, placed in a 60°C water bath and continued to stir for 45 min to obtain modified starch. Add the stable natural rubber clear to the modified starch and mix quickly, stir in a water bath at 60°C for 3 hours, then add 0.32g N, N-methylenebisacrylamide and 0.07g potassium persulfate, stir for 2 hours, cool to room temperature, and filtered to obtain starch graft modified natural skim emulsion, which is an environmentally friendly slow-release fertilizer coating material.

[0031]Performance test: Directly dry starch-modified natural skim emulsion on a polytetrafluoroethylene board to form a film. The elongation at bre...

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PUM

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Abstract

The present invention belongs to the technical field of slow-release fertilizer coating material preparation, and relates to an environmental protection type slow-release fertilizer coating material preparation method, which comprises: taking a natural skim rubber, pre-treating, taking manihot esculenta starch, and modifying to obtain modified starch for spare; and adding the modified starch to the natural skim rubber, rapidly and uniformly mixing, adding a cross-linking agent and a short chain starch activator, and carrying out a reaction to obtain a starch grafted and modified natural skim rubber emulsion, ie., the environmental protection type slow-release fertilizer coating material. According to the present invention, the pre-activation short chain starch emission grafting technology is used, the process is simple, and the reaction is stable; and according to the obtained slow-release fertilizer coating material, the slow-release property of the fertilizer can be regulated, the coating has good toughness and good soil burying degradation property, the high added value utilization of the natural skim rubber is easily achieved, the natural environment protection and the l petrochemical resource saving are easily achieved, and the traditional agriculture is easily converted into the green organic agriculture.

Description

technical field [0001] The invention belongs to the technical field of preparation of slow-release fertilizer coating materials, and in particular relates to a preparation method of slow-release film materials based on natural rubber modified polymers. Background technique [0002] Fertilizers are important chemical products that provide nutrients to plants and promote their growth. In this century, with the rapid increase of population and the needs of society, my country's agriculture has accelerated the increase in grain and feed production, and the amount of chemical fertilizers has risen sharply. Since most chemical fertilizers are water-soluble or easy to volatilize at room temperature, during their application, most of them do not reach the plant root system, are not absorbed by the plant and are lost in vain, which not only causes huge losses, but also causes environmental pollution. . In recent years, slow-release fertilizers have gradually become the focus of res...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08L3/04C08C19/00C05G3/00
Inventor 赵富春吴春萍牛超群王小慧陈开梅廖双泉
Owner HAINAN UNIVERSITY
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