阅读说明：本技术 一种松香包埋处理辣椒素防污剂及其制备方法与应用 (Rosin-embedded capsaicin antifouling agent and preparation method and application thereof ) 是由 张占平 高强 齐育红 于 2019-11-19 设计创作，主要内容包括：本发明提供一种松香包埋处理辣椒素防污剂及其制备方法与应用,所述防污剂包括辣椒素、多孔粉体和松香树脂；所述辣椒素负载于多孔粉体上形成负载体；所述松香树脂包覆所述负载体；所述防污剂的组成质量比为辣椒素：多孔粉体：松香树脂＝1:2～4:0.05～0.15。本发明利用松香在海水中的溶解性以及与有机溶剂、树脂的良好相容性,采用松香对辣椒素进行包埋处理,一方面可以实现对辣椒素的表面保护,防止其在防污涂料的生产制造过程中和防污涂料的涂装应用过程中持续释放弥散在空气中,造成生产和涂装工人的皮肤刺激和过敏等健康危害,防止辣椒素在空气中持续释放、降低防污功效。(The invention provides a capsaicin anti-fouling agent for rosin embedding treatment and a preparation method and application thereof, wherein the anti-fouling agent comprises capsaicin, porous powder and rosin resin; the capsaicin is loaded on the porous powder to form a loading body; the rosin resin coats the load body; the antifouling agent comprises the following components in percentage by mass: porous powder: the rosin resin is 1: 2-4: 0.05-0.15. According to the invention, by utilizing the solubility of rosin in seawater and good compatibility of rosin with organic solvents and resins, and adopting rosin to carry out embedding treatment on capsaicin, on one hand, the surface protection of capsaicin can be realized, the capsaicin is prevented from being continuously released and dispersed in the air in the production and manufacturing process of the antifouling paint and the coating application process of the antifouling paint, so that the health hazards of skin irritation, allergy and the like of production and coating workers are prevented, the capsaicin is prevented from being continuously released in the air, and the antifouling effect is reduced.)

1. A capsaicin antifoulant is characterized in that the antifoulant comprises capsaicin, porous powder and rosin resin; the capsaicin is loaded on the porous powder to form a loading body; the rosin resin coats the load body; the antifouling agent comprises the following components in percentage by mass: porous powder: the rosin resin is 1: 2-4: 0.05-0.15.

2. The capsaicin antifoulant according to claim 1, wherein the porous powder is at least one of diatomaceous earth, carbon nanotubes, porous titanium dioxide, porous zinc oxide, and porous silica; the aperture of the porous powder is 0.3 nanometer to 2 micrometers.

3. The capsaicin antifoulant of claim 1, wherein the rosin resin is 60% rosin resin 422.

4. A capsaicin antifoulant according to claim 1, wherein the capsaicin is a synthetic capsaicin, a natural capsaicin.

5. A method for preparing a capsaicin anti-fouling agent according to claim 1, comprising the steps of:

(1) dissolving capsaicin in deionized water, and stirring at 80-90 ℃ for 0.25-1 h to obtain a capsaicin suspension; the mass concentration of the capsaicin suspension is 4-12%;

(2) adding porous powder into the capsaicin suspension to disperse the porous powder into the capsaicin suspension, stirring at 80-90 ℃ for 0.1-0.25 h, cooling to room temperature-40 ℃, and stirring for 0.5-1 h to separate out capsaicin crystals to obtain a porous powder loaded capsaicin solution;

(3) and (3) adding a rosin resin solution into the porous powder loaded capsaicin solution obtained in the step (2), stirring for 1-2 h at room temperature-40 ℃, filtering, and drying to obtain the capsaicin anti-fouling agent.

6. The production method according to claim 5, wherein the rosin resin solution is prepared by dissolving 30 to 50 parts by mass of rosin in 70 to 50 parts by mass of ethanol or acetone.

7. The preparation method according to claim 5, wherein the stirring speed in the step (1) is 200-300 r/min; the stirring speed in the step (2) is 300-450 r/min, and the stirring speed in the step (3) is 200-300 r/min.

8. A capsaicin antifouling paint, which is characterized by comprising the capsaicin antifouling agent.

9. An antifouling coating, wherein said coating is prepared by applying the antifouling paint according to claim 8.

Technical Field

The invention belongs to the technical field of marine antifouling paint and underwater paint. In particular to a rosin embedded capsaicin anti-fouling agent and a preparation method and application thereof.

Background

The pollution problem of marine organisms always limits the development and utilization of marine resources by people, the navigation resistance of ships is increased due to the attachment of various marine organisms, the fuel consumption is increased, the metabolic products of the marine organisms corrode the ships, the maintenance cost of the ships is increased, the sailing rate of the ships is reduced, the marine organisms block various pipelines, valves and meshes of culture cages at the bottom of the sea, and the economic loss is difficult to estimate. In order to prevent and remove marine organisms, the application of antifouling paint is the only economically and efficiently important way to solve the fouling problem and widely apply.

With the enhancement of environmental awareness, the search for an environmentally-friendly natural product antifouling agent has become a research hotspot in the field of antifouling coatings, and the successful application of capsaicin as a repellent for insects and animals has prompted us to use it as a possible antifouling agent. The characteristics of no toxicity, no biocidal activity, no leaching and the like make the organic tin compound a feasible substitute. At present, many reports on capsaicin synthetic antifouling agents are reported, and the development of chemically synthetic capsaicin antifouling agents further enhances the antifouling performance of the capsaicin synthetic antifouling agents. The development of the efficient, low-toxicity and even non-toxic environment-friendly natural product antifouling agent can meet the antifouling requirement on the basis of protecting the ecological environment, and is an important direction for future development.

For example, linopenfort and the like compound active substances in hot pepper with organic clay to prepare a coating, so that capsaicin can play a good antifouling effect under the condition of keeping bioactivity; CN1477166A discloses a capsaicin self-polishing antifouling paint prepared by mixing capsaicin with active acrylic resin and pigments and fillers; CN106905780A discloses a capsaicin environment-friendly antifouling paint and a preparation method thereof, wherein an organic solvent is used for completely dissolving high-concentration capsicum oleoresin, and then the capsicum oleoresin is mixed with other components by stirring and ball mill grinding to obtain the capsaicin environment-friendly antifouling paint. However, relevant experimental studies of the inventor show that, on one hand, during the production and coating application processes of the capsaicin antifouling paint, capsaicin is easy to volatilize into the air, which causes respiratory tract and skin allergic reactions of production and construction personnel, and on the other hand, the release rate of capsaicin in the cured coating is difficult to control effectively, and the antifouling coating sometimes has defects of foaming, peeling, falling off and the like.

Disclosure of Invention

Based on the above background technology, the invention aims to provide the capsaicine embedded with rosinThe rosin is dissolved in a plurality of organic solvents such as ethanol, ether, acetone, benzene, carbon disulfide, turpentine, oil and alkali solution, but is insoluble in water and slightly soluble in hot water, so the rosin can be used as an excellent antifouling agent exudation auxiliary agent to be mixed and added into the poison releasing antifouling paint. The rosin is composed of 90% abietic acid, and the dissolution rate of the rosin in seawater with the pH value of 8.1-8.3 is 100 mu g/cm²D. Due to the dissolution of rosin in the antifouling paints, the channels for dissolving and seeping the antifouling agent are dredged, the effect of continuously updating the surface of the antifouling paint film is achieved, and the continuous and effective release of the antifouling agent in the antifouling paint film is ensured.

In order to reduce the waste of capsaicin and effectively control the stable release of capsaicin from the antifouling coating into seawater. According to the invention, the rosin is used for embedding capsaicin by utilizing the solubility of the rosin in seawater and good compatibility with organic solvents and resins, so that on one hand, the surface protection of the capsaicin can be realized, the capsaicin is prevented from being continuously released and dispersed in the air in the production and manufacturing process of the antifouling paint and the coating application process of the antifouling paint, the health hazards of skin irritation, allergy and the like of production and coating workers are prevented, the capsaicin is prevented from being continuously released in the air, and the antifouling effect is reduced; meanwhile, the controllable slow release of the capsaicin in the seawater is realized, and when the capsaicin sustained-release oil-based antifouling paint is used in an antifouling marine paint, the compatibility of the capsaicin in the oily paint and a film-forming substance, the dispersibility of the capsaicin in the paint, the mechanical property and the anti-settling property of the antifouling paint can be improved, the slow release rate of the capsaicin in the antifouling paint in the seawater can be regulated and controlled, the capsaicin waste is reduced, and the antifouling effect of the capsaicin is fully exerted.

The purpose of the invention is realized by the following technical scheme:

the invention provides a rosin embedding capsaicin antifouling agent, which comprises capsaicin, porous powder and rosin resin; the capsaicin is loaded on the porous powder to form a loading body; the rosin resin coats the load body; the antifouling agent comprises the following components in percentage by mass: porous powder: rosin resin 1: 2-4: 0.05 to 0.15.

Based on the technical scheme, preferably, the porous powder is at least one of diatomite, carbon nano tubes, porous titanium dioxide, porous zinc oxide and porous silicon dioxide; the aperture of the porous powder is 0.3 nanometer to 2 micrometers.

Based on the technical scheme, preferably, the rosin resin is 60% of rosin resin 422.

Based on the technical scheme, preferably, the capsaicin is synthetic capsaicin or natural capsaicin.

The invention also provides a preparation method of the capsaicin anti-fouling agent embedded with rosin, which comprises the following steps:

(1) dissolving capsaicin in deionized water, and stirring at 80-90 ℃ for 0.25-1 h to obtain a capsaicin suspension; the mass concentration of the capsaicin suspension is 4-12%;

(2) adding porous powder into the capsaicin suspension to disperse the porous powder into the capsaicin suspension, stirring at 80-90 ℃ for 0.1-0.25 h, cooling to room temperature (20) -40 ℃, and stirring for 0.5-1 h to separate out capsaicin crystals to obtain a porous powder loaded capsaicin solution; the room temperature is preferably 20 ℃.

(3) And (3) adding the rosin resin solution into the porous powder loaded capsaicin solution obtained in the step (2), stirring for 1-2 h at room temperature-40 ℃, filtering, and drying to obtain the capsaicin anti-fouling agent.

Based on the technical scheme, preferably, the rosin with the concentration of 30-50 parts by mass of the rosin resin solution is dissolved in 70-50 parts by mass of ethanol or acetone.

Based on the technical scheme, preferably, the stirring speed in the step (1) is 200-300 r/min; the stirring speed in the step (1) is 200-300 r/min; the stirring speed in the step (2) is 300-450 r/min, and the stirring speed in the step (3) is 200-300 r/min.

The specific steps can be expressed as: adding 1 part by mass of synthetic capsaicin into a four-neck flask, adding 100-500 mL of sterilized deionized water until the liquid level does not cover a stirring paddle, heating and stirring the four-neck flask on a constant-temperature water bath kettle, setting the initial temperature of the constant-temperature water bath kettle to be 80-90 ℃, setting the rotating speed of a stirring rod to be 200-300 r/min, dissolving the synthetic capsaicin in the sterilized deionized water after half an hour, then reducing the rotating speed of the stirring paddle, weighing 2-4 parts by mass of diatomite, slowly adding the diatomite into the four-neck flask, increasing the rotating speed to 400-450 r/min, uniformly dispersing the diatomite in a capsaicin suspension, removing the water bath kettle after 10-15 minutes, reducing the rotating speed to 200-300 r/min, simultaneously introducing cooling water to the surface of the four-neck flask until the liquid in the four-neck flask is cooled to room temperature, and precipitating capsaicin crystals and depositing in micropores and on the surface of the diatomite, and after 30-60 minutes, reducing the rotating speed, dropwise adding a rosin solution with the mass of 5-30% of the sum of the capsaicin and the diatomite into the four-mouth flask, increasing the rotating speed to 400-450 r/min again, continuously stirring to enable the rosin resin to be separated out and wrap on the diatomite on which the capsaicin is deposited, pouring out the mixed liquid in the four-mouth flask after 1-2 hours, filtering and drying, and collecting dried powder, namely the capsaicin antifouling agent, which can be used for preparing the capsaicin antifouling paint.

According to another aspect of the present invention, there is provided a capsaicin paint, which comprises the rosin-embedded capsaicin antifoulant.

The invention also provides a coating which is characterized by being prepared by coating the coating.

Advantageous effects

(1) According to the invention, by utilizing the solubility of rosin in seawater and good compatibility of rosin with organic solvents and resins, and adopting rosin to carry out embedding treatment on capsaicin, on one hand, the surface protection of capsaicin can be realized, the capsaicin is prevented from being continuously released and dispersed in the air in the production and manufacturing process of the antifouling paint and the coating application process of the antifouling paint, so that the health hazards of skin irritation, allergy and the like of production and coating workers are prevented, the capsaicin is prevented from being continuously released in the air, and the antifouling effect is reduced.

(2) The invention can realize the controllable slow release of the capsaicin in the seawater, the release rate of the capsaicin after the embedding treatment is reduced by more than 50 percent, the waste of the capsaicin is reduced, and the antifouling efficiency of the capsaicin is fully exerted.

(3) The capsaicin sustained-release paint can be used in marine antifouling paint, can improve the compatibility of capsaicin with film-forming substances in oily paint, the dispersibility in paint, the mechanical property and the anti-settling property of antifouling paint, realize the regulation and control of the sustained-release rate of capsaicin in the antifouling paint in seawater, realize the controllable sustained-release, reduce the waste of capsaicin and fully exert the antifouling effect of capsaicin.

Drawings

FIG. 1 is a graph showing capsaicin release profiles of antifouling agents prepared in examples 1 to 5 and comparative examples 1 to 5.

Detailed Description