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Degradable, environment-friendly and antifouling microcapsules as well as preparation method and application thereof

A microcapsule and antifouling technology, applied in the directions of microcapsule preparation, microsphere preparation and application, can solve the problems of inability to provide protection effect for a long time, inability to achieve long-term effect, injury to construction personnel, etc., and achieve sustained and stable slow release. effect, excellent encapsulation performance, the effect of ensuring stability

Inactive Publication Date: 2019-07-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although capsaicin has a good antibacterial and bactericidal effect, it can be used in antifouling agents, but if it is used directly, it will cause great harm to the construction personnel, and it cannot provide protective effect for a long time
In addition, capsaicin will cause certain losses due to factors such as light and heat in the process of storage, transportation, and landfill. As an antifouling and antibiological drug, its action time is short and its stability is poor.
The simple use of capsaicin will easily lead to the rapid release of the active substance in a short period of time, and the long-term effect cannot be achieved
[0004] However, the existing microcapsule antifouling agent will disperse in the environment during production, storage and application because the shell layer is not easy to degrade, causing pollution problems

Method used

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  • Degradable, environment-friendly and antifouling microcapsules as well as preparation method and application thereof
  • Degradable, environment-friendly and antifouling microcapsules as well as preparation method and application thereof
  • Degradable, environment-friendly and antifouling microcapsules as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A preparation process of degradable environment-friendly and antifouling microcapsules: dissolve 5g of chitosan (degree of deacetylation ≥70%) with 1g of hydrochloric acid, add 200g of water, add 5g of capsaicin and fully stir to form a stable suspension with viscosity , and then squeeze the suspension into small droplets (the injection rate of the syringe pump is 0.05mL / min, and the air flow rate is 1mL / min) through the electric uniform speed syringe pump, and then drop into the CaCl 2(mass percentage 1%) in a salt water bath, after 0.5h of solidification, the degradable environment-friendly antifouling microcapsules are obtained.

[0040] Take 5g of degradable environmental protection and antifouling microcapsules, put them in a 50mL open conical flask, put them in a constant temperature oven at 50°C, take samples in real time to measure the quality of the samples, and compare the sustained release performance of the microcapsules by measuring the loss rate of the samp...

Embodiment 2

[0046] A kind of preparation process of degradable environment-friendly antifouling microcapsules: dissolving 5g chitosan (deacetylation degree ≥ 70%) with 1g acetic acid, and adding 200g water, adding 5g dihydrocapsaicin and fully stirring to form a viscous Stabilize the suspension, and then squeeze the suspension into small droplets through an electric constant-speed syringe pump (the injection rate of the syringe pump is 0.05mL / min; the gas shear rate is 1mL / min), and drop it into the CaCl 2 (mass percentage 1%) in a salt water bath, after 0.5h of solidification, the degradable environment-friendly antifouling microcapsules are obtained.

[0047] Take 5g of degradable environmental protection and antifouling microcapsules, put them in a 50mL open conical flask, put them in a constant temperature oven at 50°C, take samples in real time to measure the quality of the samples, and compare the sustained release performance of the microcapsules by measuring the loss rate of the sa...

Embodiment 3

[0053] A preparation process of degradable environmental protection and antifouling microcapsules: dissolve 5g chitosan with 1g hydrochloric acid and add 200g water, add 5g nordihydrocapsaicin and stir well to form a stable suspension with viscosity Syringe pump, squeeze the suspension into small droplets (the injection rate of the syringe pump is 0.05mL / min, the flow rate of the air is 1mL / min), drop into the CaCl 2 (mass percentage 1%) in a salt water bath, after 0.5h of solidification, the degradable environment-friendly antifouling microcapsules are obtained.

[0054] Take 5g of degradable environmental protection and antifouling microcapsules, put them in a 50mL open conical flask, put them in a constant temperature oven at 50°C, take samples in real time to measure the quality of the samples, and compare the sustained release performance of the microcapsules by measuring the loss rate of the sample quality. The results are shown in Table 3 below.

[0055] The microcapsu...

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Abstract

The invention belongs to the technical field of microcapsules and discloses degradable, environment-friendly and antifouling microcapsules as well as a preparation method and an application thereof. The method comprises steps as follows: 1) a solution is prepared from chitosan by use of acid, and a chitosan solution is obtained; the chitosan solution and capsaicin compounds are mixed uniformly, and a suspension is obtained; 2) the suspension is dropwise added to a calcium chloride solution in a liquid drop form, curing is performed, and the degradable, environment-friendly and antifouling microcapsules are obtained. The method is simple and low in cost, the prepared microcapsules are degradable, the stability of capsaicin is improved, too large irritation of the capsaicin to a human body during use is avoided, and the environmental protection problem is solved; meanwhile, the microcapsules have excellent encapsulating performance, lasting and stable slow release effect and a better antifouling effect. The microcapsules are applied in the fields of food, medicines and coatings.

Description

technical field [0001] The invention belongs to the technical field of microcapsules, and in particular relates to a degradable environment-friendly antifouling microcapsule and a preparation method and application thereof. The application of the degradable environment-friendly antifouling microcapsules in food, medicine and functional coatings. Background technique [0002] Although microencapsulation technology started in the 1930s, it has developed very rapidly. So far, it has been widely used in food, medicine, cosmetics and other fields. Microencapsulation technology refers to the technology of encapsulating solids, liquids or gases in tiny and sealed capsules so that they are released at a certain rate under specific conditions. Among them, the encapsulated material is called the core material, and the material that encapsulates the core material to achieve microencapsulation is called the wall material. The core material can be oil-soluble, water-soluble compound o...

Claims

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Application Information

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IPC IPC(8): B01J13/04A23L3/3562A23L3/358C09D5/16A61K47/18
CPCA23L3/3562A23L3/358A23V2002/00A61K47/18B01J13/04C09D5/1625A23V2250/511A23V2250/1578
Inventor 胡剑峰来鑫瞿金清
Owner SOUTH CHINA UNIV OF TECH
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