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Anti-biological microcapsule as well as preparation method and application thereof

A microcapsule and biological technology, applied in the direction of microcapsule preparation, microsphere preparation, biocide-containing paint, etc., can solve the problem that the application range is greatly affected by the ambient temperature and humidity, the storage of bio-repellents is unstable, and the bio-repellents have long-term effects Insufficient stability and other problems, to achieve the effect of ensuring quality stability and storage stability, long-term anti-biological effect, and sustained and stable slow-release effect

Inactive Publication Date: 2019-07-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a bio-repellent microcapsule and its preparation for the problems that the bio-repellant is unstable in storage, its application range is greatly affected by the ambient temperature and humidity, it pollutes the environment, and its long-term effect on repelling organisms is not enough. method

Method used

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  • Anti-biological microcapsule as well as preparation method and application thereof
  • Anti-biological microcapsule as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A preparation method of anti-biological microcapsules, comprising the following steps:

[0047] (1) Preparation of melamine prepolymer: Mix 7.5g melamine (purity≧95%, moisture≦2%) and 14.46g formaldehyde solution (density 1.090~1.111g / ml, purity 37±2%, methanol content 3.0± 2%, formic acid content≦0.5%) is placed in the reaction vessel and stirred and mixed, and 0.2g of the first class pH regulator triethylamine (purity≧99%, moisture≦0.2%) is added to adjust the pH value of the system to 8~9. Heat and stir the mixed solution of melamine and formaldehyde in a water bath at 65°C. After about 10 minutes, the system becomes transparent. Add distilled water of the same quality as the formaldehyde solution and continue the reaction for 50 minutes to obtain a transparent and low molecular weight water-soluble melamine-formaldehyde prepolymer that is dense. Amine prepolymer;

[0048] (2) Preparation of melamine resin and polyurea resin double-shell microcapsules: 30g emulsifie...

Embodiment 2

[0052] A preparation method of anti-biological microcapsules, comprising the following steps:

[0053] (1) Preparation of melamine prepolymer: mix 7.5g melamine (purity≧95%, moisture≦2%) and 16.87g formaldehyde solution (density 1.090~1.111g / ml, purity 37±2%, methanol content 3.0± 2%, formic acid content≦0.5%) is placed in the reaction vessel and stirred and mixed, and 0.2g of the first class pH regulator triethylamine (purity≧99%, moisture≦0.2%) is added to adjust the pH value of the system to 8~9. Heat and stir the mixed solution of melamine and formaldehyde in a water bath at 65°C. After about 10 minutes, the system becomes transparent. Add distilled water of the same quality as the formaldehyde solution and continue the reaction for 50 minutes to obtain a transparent and low molecular weight water-soluble melamine-formaldehyde prepolymer that is dense. Amine prepolymer;

[0054] (2) Preparation of melamine resin and polyurea resin double-shell microcapsules: 30g emulsifie...

Embodiment 3

[0058] A preparation method of anti-biological microcapsules, comprising the following steps:

[0059] (1) Preparation of melamine prepolymer: mix 7.5g melamine (purity≧95%, moisture≦2%) and 19.28g formaldehyde solution (density 1.090~1.111g / ml, purity 37±2%, methanol content 3.0± 2%, formic acid content≦0.5%) is placed in the reaction vessel and stirred and mixed, and 0.2g of the first class pH regulator triethylamine (purity≧99%, moisture≦0.2%) is added to adjust the pH value of the system to 8~9. Heat and stir the mixed solution of melamine and formaldehyde in a water bath at 65°C. After about 10 minutes, the system becomes transparent. Add distilled water of the same quality as the formaldehyde solution and continue the reaction for 50 minutes to obtain a transparent and low molecular weight water-soluble melamine-formaldehyde prepolymer that is dense. Amine prepolymer;

[0060] (2) Preparation of melamine resin and polyurea resin double-shell microcapsules: 30g emulsifie...

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Abstract

The invention belongs to the technical field of microcapsules, and discloses an anti-biological microcapsule as well as a preparation method and application thereof. The method comprises the followingsteps: 1) mixing melamine with formaldehyde, adjusting the pH value to 8-9, conducting stirring and reacting at 65-70 DEG C until the solution is transparent, adding water, and continuing to conductreaction for 20-50 minutes to obtain a melamine prepolymer; and 2) uniformly mixing the melamine prepolymer, a chain extender and an emulsifier, adjusting the pH value to 1-6, adding a curing agent, acapsaicin compound and an organic solvent, conducting emulsifying under an ice bath condition, conducting heating to 40-65 DEG C, conducting stirring and reacting for 3-5 hours, adjusting the pH value to be greater than or equal to 6, and stopping the reaction to obtain the anti-biological microcapsule. The method provided by the invention is simple, and the prepared microcapsule has a relativelygood slow release effect and encapsulation efficiency on a core material, so that the core material is prevented from being released in a large amount within a short time, and the duration of an antifouling effect is prolonged; the stability of the core material is improved, and the anti-biological effect time is long; the environment is protected; and the method and the microcapsule are appliedto the fields of antibiosis, pollution prevention and biology prevention.

Description

technical field [0001] The invention belongs to the technical field of microcapsules, and in particular relates to an anti-biological microcapsule and its preparation method and application. The microcapsules are suitable for application in coatings for preventing insects, preventing rodents from biting and avoiding marine organisms. Background technique [0002] Microcapsule technology first started in the 1930s. After decades of development, it has been widely used in food, medicine, cosmetics and other fields. Under the background of multidisciplinary applications, microcapsule technology has a tendency to expand to new fields such as resins and coatings. The so-called microcapsule technology refers to the technology of encapsulating solid, liquid or gas in tiny and sealed capsules by physical or chemical methods, and releasing them at a certain rate by controlling environmental conditions. Among them, the encapsulated substance is called the active core material, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/14B01J13/16B01J13/18C09D5/14C09D5/16
CPCB01J13/14B01J13/16B01J13/18C09D5/14C09D5/1687
Inventor 胡剑峰来鑫瞿金清
Owner SOUTH CHINA UNIV OF TECH
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