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Preparation method of microcapsules coated with liquid alkene

A microcapsule, liquid state technology is applied in the field of preparation of microcapsules, which can solve the problems of cumbersome control of reaction conditions, complicated operation process and low level, and achieve the effects of simplifying the preparation process of capsules, the efficient preparation method and the preparation process.

Active Publication Date: 2015-11-25
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And these traditional methods have two shortcomings: 1. The reaction time is long, the operation process is complicated, the reaction condition control is loaded down with trivial details and the dispersibility of the obtained capsule is difficult to control; 2. Most of the preparation process adopts emulsifier as stabilizer, and the emulsion prepared is stable Poor resistance, easy to aggregate and low coating efficiency

Method used

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  • Preparation method of microcapsules coated with liquid alkene
  • Preparation method of microcapsules coated with liquid alkene

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: the preparation of encapsulating ethylenic restorative agent microcapsules

[0028] Mix 0.5g trimethylolpropane tris(3-mercaptopropionate), 0.42g isophorone diisocyanate and 2.14g triallyl isocyanurate to form an oil phase, and mix 0.15g SiO 2 The particles were added to 15g of water and stirred to disperse evenly to form a water phase. Add the obtained oil phase and water phase into a three-necked flask equipped with a stirrer, start the stirring and control the rotation speed at 1000rpm, and stir for 10min to obtain an oil-in-water Pickering emulsion; then, drop 1mL of three Butylamine was reacted under the catalysis of amine for 10 minutes to obtain microcapsules coated with vinyl repair agent, washed with distilled water, filtered through a Buchner funnel, and dried in air to obtain dry microcapsules coated with vinyl repair agent.

Embodiment 2

[0029] Embodiment 2: the preparation of encapsulating ethylenic restorative agent microcapsules

[0030] Mix 0.5g trimethylolpropane tris(3-mercaptopropionate), 0.42g isophorone diisocyanate and 2.14g glycidyl methacrylate to form an oil phase, and mix 0.75g SiO 2 The particles were added to 15g of water and stirred to disperse evenly to form a water phase. Add the obtained oil phase and water phase into a three-necked flask equipped with a stirrer, start stirring and control the rotation speed at 2000rpm, stir for 10min to obtain an oil-in-water Pickering emulsion; then, drop 1.5mL of Tributylamine, reacted under the catalysis of amine for 10min to obtain the microcapsules coated with ethylenic repair agent, washed with distilled water, filtered through Buchner funnel, and dried in air to obtain dry microcapsules coated with ethylenic repair agent .

Embodiment 3

[0031] Embodiment 3: the preparation of encapsulating ethylenic restorative agent microcapsules

[0032] 0.5g trimethylolpropane three (3-mercapto propionate), 0.42g isophorone diisocyanate and 2.14g tripropylene glycol diacrylate are mixed uniformly to form an oil phase, and 0.05g SiO 2 The particles were added to 10g of water and stirred to disperse evenly to form a water phase. Add the obtained oil phase and water phase into a three-neck flask equipped with a stirrer, start stirring and control the rotation speed at 1000rpm, and stir for 10min to obtain an oil-in-water Pickering emulsion; then, dropwise add 0.5mLN to the obtained Pickering emulsion , N-dimethylacetamide, under the catalysis of amine, reacted for 10min to obtain the microcapsules of the encapsulation repair agent, washed with distilled water, filtered through the Buchner funnel, and dried in the air to obtain the dry encapsulation agent Microcapsules of restoratives.

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Abstract

The invention relates to a preparation method of microcapsules coated with liquid alkene. An oil-in-water type Pickering emulsion is prepared with solid particles being stabilizers, a mercaptan, isocyanate and alkene monomer mixture serves as an oil phase, and the microcapsules coated with alkene monomers can be fast prepared due to the characteristics that mercaptan-isocyanate has a click reaction under the condition of alkali catalysts and the alkene monomers do not participate in the reaction. By means of the method, the capsule preparation process is greatly shortened and simplified, and a new, fast and efficient preparation method is provided for preparing the microcapsules. Due to the fact that the reaction is fast, the requirement for the stability of the emulsion is low, and microcapsules coated with different core materials can be prepared through the same preparing technology. The method has very great application potential in the aspect of microcapsule preparation in the fields of drug-controlled release, phase transformation materials, catalysis and the like.

Description

technical field [0001] The invention belongs to a preparation method of microcapsules, in particular to a preparation method of coated liquid alkene microcapsules, using thiol, isocyanate and alkene monomers as the oil phase, through the click reaction of thiol-isocyanate under an alkali catalyst Quickly obtain microcapsules coated with ethylenic monomers. Background technique [0002] Microcapsules have important applications in various fields such as controlled drug release, catalysis, food encapsulation, and phase change materials. In the past ten years, the emergence of self-healing materials has made microcapsules receive extensive attention and research. The capsules coated with the liquid repair agent are dispersed in the polymer matrix, and when the matrix cracks, the capsules are forced to rupture to release the repair agent to complete the repair process. At present, the methods for preparing microcapsules are mainly interfacial polymerization and in-situ polymer...

Claims

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Application Information

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IPC IPC(8): B01J13/14
Inventor 张秋禹李春梅谭蕉君范丽莉
Owner NORTHWESTERN POLYTECHNICAL UNIV
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