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Silicone oil microcapsule with slow-release characteristics and preparation method thereof

A technology of microcapsule and silicone oil, applied in the direction of coating, can solve the problems of poor heat resistance of silicone oil microcapsule wall, complicated preparation process, poor environmental protection, etc., and achieve the effects of low cost, simple process and easy control.

Inactive Publication Date: 2011-04-27
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned silicone oil microcapsules all use organic resins (such as polyacrylic acid resin, urea-formaldehyde resin, polyamide resin, polysulfone resin) as shells, which have the disadvantages of complex preparation process, poor environmental protection, and poor heat resistance of the silicone oil microcapsule wall.

Method used

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  • Silicone oil microcapsule with slow-release characteristics and preparation method thereof
  • Silicone oil microcapsule with slow-release characteristics and preparation method thereof
  • Silicone oil microcapsule with slow-release characteristics and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Dissolve 0.25 g of sodium dodecylsulfonate and 0.75 g of high-carbon fatty alcohol polyoxyethylene ether in 100 g of deionized water, and then add 10 g of simethicone, 10 g of TEOS, and 1 g of octadecyl trimethyl The oil phase mixture composed of oxysilane was pre-emulsified and stirred for 15 minutes in an ice-water bath environment, and then ultrasonically fine-emulsified for 20 minutes using a cell pulverizer to obtain a fine emulsion. Adjust the pH value of the miniemulsion to 7.5, and stir at a high speed at room temperature for 24 hours to obtain a milky white silicone oil microcapsule suspension.

[0024] 3.91 g of the above silicone oil microcapsule suspension, 10 g of water, 3.76 g of silicone acrylic emulsion (solid content 46%), 3 g of titanium dioxide, and 0.06 g of BYK-1540.06 g were prepared into a coating, coated, and dried at room temperature for 12 hours to obtain a hydrophobic coating.

Embodiment 2

[0026] Dissolve 0.25 g of sodium dodecylsulfonate and 0.75 g of alkylphenol polyoxyethylene ether in 100 g of deionized water, then add 10 g of simethicone, 7 g of TEOS, and 1.5 g of cetyl trimethoxy Oil phase mixture composed of base silane. Pre-emulsified and stirred for 15 minutes in an ice-water bath environment, and then ultrasonically fine-emulsified for 20 minutes using a cell pulverizer to obtain a fine emulsion. Adjust the pH value of the miniemulsion to 8, and stir at a high speed at room temperature for 24 hours to obtain a milky white silicone oil microcapsule suspension.

[0027] 3.25 grams of the above silicone oil microcapsule suspension, 10 grams of water, 3.11 grams of silicone acrylic emulsion (solid content 46%), 3 grams of titanium dioxide, and 0.06 grams of BYK-1540.06 were formulated into a coating, coated, and dried at room temperature for 12 hours to obtain a hydrophobic coating.

Embodiment 3

[0029] Dissolve 0.25 g of sodium dodecylsulfonate and 0.75 g of alkylphenol polyoxyethylene ether in 100 g of deionized water, then add 10 g of simethicone, 10 g of TEOS, and 1.5 g of octadecyl trimethoxy The oil phase mixture composed of base silane was pre-emulsified and stirred for 15 minutes in an ice-water bath environment, and then ultrasonically fine-emulsified for 20 minutes using a cell pulverizer to obtain a fine emulsion. Adjust the pH value of the miniemulsion to 7.5, and stir at a high speed at room temperature for 24 hours to obtain a milky white silicone oil microcapsule suspension.

[0030] 3.41 grams of the above silicone oil microcapsule suspension, 10 grams of water, 3.26 grams of silicone acrylic emulsion (solid content 46%), 3 grams of titanium dioxide, and 0.06 grams of BYK-1540.06 were formulated into a coating, coated, and dried at room temperature for 12 hours to obtain a hydrophobic coating.

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Abstract

The invention provides a silicone oil microcapsule with slow-release characteristics and a preparation method thereof, relating to the field of new chemical materials. In the invention, ethyl orthosilicate or methyl orthosilicate, non-functional linear silicone oil and silane coupling agents with long-chain alkyl are used as oil phases, silicone oil microcapsule dispersion liquid taking silicon dioxide as a shell is prepared by the following steps of: compounding anionic surface active agents with nonionic surface active agents into emulsifying agents; carrying out ultrasonic emulsification to obtain miniemulsion; stirring at room temperature for hydrolysis; and finally regulating pH value; wherein the silicone oil microcapsule dispersion liquid taking silicon dioxide has grain diameter of 140-260 nanometers and solid content of 13%-20%. The silicone oil microcapsule has high storage stability and good slow-release characteristics and can be directly used for the preparation of high-durability hydrophobic coating.

Description

technical field [0001] The invention relates to the field of new chemical materials, in particular to a silicone oil microcapsule with slow-release properties and a preparation method thereof. Background of the invention [0002] The prior art discloses that silicone oil has the characteristics of small viscosity-temperature coefficient, high and low temperature resistance, oxidation resistance, high lightning, low volatility, good insulation, low surface tension, no corrosion to metal, non-toxic, low vapor pressure, etc., and can be used for advanced Lubricating oil, insulating oil, defoaming agent, release agent, brightening agent, antifouling coating, etc. Studies have shown that in addition to the above-mentioned uses, microcapsules containing silicone oil can also be used as high-efficiency corrosion inhibitors for weapons, organic pollutant extraction agents, biological oxidation reaction storage, slow-release hydrophobic agents, slow-release antifouling agents, etc. ...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08K3/36C09D183/04
Inventor 周树学庞宏波武利民陈敏顾广新
Owner FUDAN UNIV
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