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Preparation method of microcapsule with double-coated structure, and microcapsule prepared thereby

A double-layer coating, microcapsule technology, applied in microcapsule preparation, microsphere preparation, coating and other directions, can solve the problems of difficult to meet coating repair needs and limited repair ability, and achieve excellent and good comprehensive weather resistance improvement. The effect of repairing resistance and suppressing destructive factors

Active Publication Date: 2019-11-12
CHENGDU TECHCAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the problem that microcapsules in the prior art often can only produce repairing effects for some situations, and the repairing ability is limited and it is difficult to meet the repairing needs of complicated situations such as coating damage or cracks, and to provide a new microcapsule preparation method and its Prepared microcapsule product

Method used

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  • Preparation method of microcapsule with double-coated structure, and microcapsule prepared thereby
  • Preparation method of microcapsule with double-coated structure, and microcapsule prepared thereby
  • Preparation method of microcapsule with double-coated structure, and microcapsule prepared thereby

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Preparation of microcapsules with double-layer coating structure

[0073] (1) Polystyrene / coated tung oil

[0074] Weigh 0.05g of initiator AIBN and add it to 12g of styrene (ST), stir thoroughly in a round bottom flask, then heat in a water bath at 80°C for 1.5h, and cool to room temperature for use. Weigh 5g of tung oil, add 1g of emulsifier sodium dodecylbenzenesulfonate, add 20g of deionized water, add 10g of the above-mentioned PS prepolymer, adjust the stirring rate, and emulsify and disperse the mixed solution in a three-necked flask for 10min to obtain a uniform emulsion . Add 0.5g resorcinol to the obtained emulsion, slowly raise the temperature to 60°C, and react for 2.5h. After the end, cool the microcapsule mixture to room temperature, wash the microcapsules with a mixed solution of ethanol and water and suction filter, and dry the product at low temperature .

[0075] (2) Polystyrene / polyaniline / tung oil

[0076]First, 0.466g of aniline was added to wat...

Embodiment 2

[0084] Preparation of microcapsules with double-layer coating structure

[0085] (1) Polystyrene / coated tung oil

[0086] Weigh 12g of styrene (ST) into a flask, add 0.06g of initiator AIBN, stir well, heat in a water bath at 80°C for 1.5h, cool to room temperature at 26°C, and set aside to obtain PS prepolymer. Weigh 5g of tung oil into a three-necked flask, add 1g of emulsifier sodium dodecylbenzenesulfonate, add 20g of deionized water, add 5g of the above PS prepolymer, adjust the magnetic stirring speed to 200r / min, and make the mixed solution in the three-necked flask Emulsify and disperse in the flask for 10 minutes to obtain a uniform emulsion. Add 0.5g resorcinol to the obtained emulsion, slowly heat up to 60°C at a rate of 2°C / min, and react for 2.5h. After the end, cool the microcapsule mixture to room temperature 26°C, wash the microcapsules with 60v% ethanol aqueous solution and pump Filter, and vacuum-dry the product at 45°C to obtain polystyrene / coated tung oil...

Embodiment 3

[0100] A method for preparing microcapsules with a double-layer coating structure, comprising the following steps:

[0101] (1) Polystyrene / coated linseed oil, tung oil

[0102] Weigh 15g of styrene (ST) into a flask, add 0.06g of initiator AIBN, stir well, heat in a water bath at 78°C for 1.5h, cool to room temperature at 26°C, and set aside to obtain PS prepolymer. Weigh 5g of linseed oil and 5g of tung oil into a three-necked flask, add 1g of emulsifier sodium dodecylbenzenesulfonate, add 30g of deionized water, and stir evenly. Add 2-3 drops of n-octanol dropwise, then add 8g of the above PS prepolymer, adjust the magnetic stirring speed to 200r / min, and emulsify and disperse the mixed solution in a three-necked flask for 20min to obtain a uniform emulsion. Add 0.6g resorcinol to the obtained emulsion, slowly heat up to 65°C at a rate of 3°C / min, and react for 2 hours. After the end, cool the microcapsule mixture to room temperature 26°C, wash the microcapsules with 60v% ...

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Abstract

The invention discloses a preparation method of a microcapsule with a double-coated structure. The preparation method comprises the following steps: (1) reacting styrene to obtain a PS prepolymer, adding an emulsifier to a repairing solution, adding the PS prepolymer to obtain an emulsion, adding resorcinol, performing a reaction, and performing separation to obtain a PS / repairing solution microcapsule; (2) dissolving aniline in water, adding the PS / repairing solution microcapsule, allowing the aniline to swell into PS / repairing solution particles;, adding potassium persulfate, dropwise addinghydrochloric acid, and performing polymerization to obtain a polystyrene / polyaniline / repairing solution microcapsule; (3) adding the polystyrene / polyaniline / repairing solution microcapsule to an aqueous solution of CaCl2 and an aqueous solution of Na2CO3, performing mixing to precipitate calcium carbonate in order to obtain a multilayer microcapsule, and removing the polystyrene template to obtain a calcium carbonate-coated polyaniline double-layer self-repairing microcapsule; and (4) adding the calcium carbonate-coated polyaniline double-layer self-repairing microcapsule to tung oil, performing stirring and reacting, filtering the obtained system, and centrifuging and washing the obtained material to obtain the calcium carbonate / polyaniline / tung oil microcapsule.

Description

technical field [0001] The invention relates to a microcapsule, in particular to a multi-repair polyaniline / calcium carbonate double-layer coated tung oil microcapsule. The invention belongs to the technical field of polymer coating product additive microcapsules. [0002] The microcapsules of the present invention have multiple repairing structures, can respond to pH changes and crack expansion and damage, and exert multiple repairing effects, and play an important role in maintaining the structural integrity of the paint. Background technique [0003] Microcapsules refer to thin-walled micro-containers or wraps made of polymers or inorganic substances. They have great application potential in the field of material crack self-healing, and are also a research hotspot that is gradually emerging in the field of new materials. [0004] The forming mechanism of microcapsules includes chemistry, physics and physical chemistry. Physical microcapsules include different microcapsul...

Claims

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Application Information

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IPC IPC(8): B01J13/14B01J13/02C08F112/08C08G73/02C09D7/61C09D7/65C09D5/08
CPCB01J13/14B01J13/02C08F112/08C08G73/0266C09D7/70C09D5/08
Inventor 廖益均吴晓莉周理曹剑飞文皓范超
Owner CHENGDU TECHCAL UNIV
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