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Preparation process for thermosensitive controlled-release material for marine antifouling agent

A marine antifouling agent and controlled-release material technology, applied in antifouling/underwater coatings, botanical equipment and methods, microsphere preparation, etc. Control the release rate of antifouling agent and other issues to achieve the effect of improving antifouling effect and utilization rate, improving utilization rate and high embedding efficiency

Active Publication Date: 2013-06-26
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to achieve the above purpose, the release control technology of the present invention for the existing antifouling agent can only slow down the release rate, and cannot adjust and control the release rate of the antifouling agent according to the change in the amount of fouling organisms, which affects the effective utilization rate of the antifouling agent A kind of marine antifouling agent temperature-sensitive controlled release material is proposed, using chitosan as raw material, chitosan temperature-sensitive material as the outer membrane, microencapsulated antifouling agent as the core, and the antifouling agent with core-shell structure is prepared. Antifouling agent temperature-sensitive controlled-release material, which can regulate the release of antifouling agent with temperature changes, has good controlled-release performance, is environmentally friendly, and has potential application prospects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: Preparation of Chitosan-loaded Antifouling Agent Microparticles

[0012] In this example, 200 mg of chitosan with a degree of deacetylation of 95% was dissolved in 50 mL of 0.1 mol / L acetic acid solution, 8 g of Tween 80, 50 mL of an acetone solution of 4 mg / ml antifouling agent paeonol was added, and the stirring speed was 1500rp, ultrasonic treatment for 10 minutes, adding cosolvent isopropanol 10mL, the solution finally showed emulsification without turbidity; then 100g sodium tripolyphosphate was added dropwise to the above solution to solidify the microspheres, stirred for 30min, and the obtained solution was filtered out of the solution , the solid is washed with acetone and deionized water for residual solvent, freeze-drying in vacuum, to obtain the product of solid chitosan-loaded antifouling agent microparticles.

Embodiment 2

[0013] Example 2: Preparation of marine antifouling agent temperature-sensitive controlled release material

[0014] In this example, 200 mg of chitosan with a degree of deacetylation of 80% was dissolved in 9 mL of 0.1 mol / L acetic acid solution; 600 mg of β-sodium glycerophosphate was dissolved in 12 mL of distilled water, and the prepared β-glycerophosphate was stirred in an ice-water bath. - The sodium glycerophosphate solution was added dropwise to the chitosan solution, and after continuing to stir for 30 min, the pH was adjusted to 7.0 with a saturated sodium hydrogen phosphate solution; 100 mg of the chitosan-loaded antifouling agent microparticles prepared in 10 mL of distilled water is dispersed and added dropwise to the above solution, and stirring is continued for 30 min in an ice bath to obtain a chitosan temperature-sensitive gel embedded with antifouling agent particles. After freezing, centrifugation and freeze-drying, the marine antifouling agent temperature-se...

Embodiment 3

[0015] Example 3: Release experiment of antifouling agent with temperature

[0016] In this example, 1 g of acrylic resin is mixed with 0.4 g of rosin, and 10 mg of paeonol and a xylene solution of thermosensitive chitosan-loaded antifouling agent particles containing equal amount of paeonol are respectively added to make a coating, which is coated on a 2cm× The surface of the 4cm glass slide was dried at room temperature and placed in 150ml of seawater at different temperatures to conduct the antifouling agent release experiment. Four different temperatures of 15°C, 20°C, 25°C and 30°C were taken respectively, and the standard curve method was used to periodically (1 times / day) to analyze the release of antifouling agent, and test the release of antifouling agent during the gradient heating and cooling process (the process of increasing from 15 °C to 30 °C and then dropping to 15 °C). The antifouling agent microcapsules coated with sugar temperature-sensitive material have st...

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PUM

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Abstract

The invention relates to a preparation process for a thermosensitive controlled-release material for a marine antifouling agent, which belongs to the field of marine antifouling technologies. The process comprises the following steps: dissolving chitosan in an HAc solution, adding tween 80 and acetone, carrying out high speed stirring and ultrasonic treatment, then adding isopropanol to form an oil / water dispersion system which is in an emulsified clear state, adding sodium tripolyphosphate for a cross-linking solidification reaction, carrying out filtration so as to remove liquor, flushing aresidual solvent with acetone and water, and carrying out refrigeration and vacuum drying so as to obtain microencapsulated particles; dissolving chitosan in the HAc solution again, dissolving sodiumbeta-glycerophosphate in water, adding a sodium beta-glycerophosphate solution into a chitosan solution under the conditions of ice water bath and stirring, continuing stirring, and adjusting the pH value of the solution to be 7.0; and dispersing the microencapsulated particles with water, then adding the dispersed particles into the chitosan solution, carrying out stirring, and then carrying outcentrifugation and drying so as to obtain the thermosensitive controlled-release material. The preparation process is simple and is convenient to control; and the prepared material has good quality, good controlled release performance, environment friendliness and a good application effect.

Description

Technical field: [0001] The invention relates to a preparation method of a marine antifouling agent temperature-sensitive controlled-release material, which can realize the effect of adjusting the release rate of the antifouling agent with the temperature change, improve the utilization rate of the antifouling agent, and prolong the antifouling period, belonging to marine antifouling. technical field. Background technique: [0002] At present, marine engineering and ships mainly prevent marine biofouling by coating anti-fouling coatings. Marine anti-fouling coatings are mainly diffused to the surface of materials through the release of marine anti-fouling agents, interacting with marine fouling organisms, killing or Repel fouling organisms, thereby effectively preventing marine organisms from attaching to the surface of the material. However, since the antifouling agent cannot be effectively controlled during the release process, there is generally an explosive release proc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N25/28A01N35/04C09D7/12C09D5/16B01J13/02
Inventor 许凤玲蔺存国郑纪勇
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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