Preparation method of essence microcapsules

A technology of flavor microcapsules and flavors, which is applied in the direction of microcapsule preparation, microsphere preparation, essential oils/fragrances, etc., which can solve the difficulty of ensuring the effectiveness of double-layer capsule wall flavor microcapsules, without mentioning the size of the capsule, and washing resistance Reduce the number of times and other problems, achieve the effect of improving chemical stability and mechanical strength, long-lasting fragrance performance, and washing resistance

Inactive Publication Date: 2011-05-04
广州市戴文高分子材料科技有限公司 +1
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Problems solved by technology

Chinese invention patent 200910035028.8 provides a method for preparing double-walled microcapsule essence by complex coacervation method. Sodium alginate and carboxymethyl cellulose are used to form the inner wall of the capsule, and gelatin-gum arabic is used to form the outer wall of the capsule. Whether the inner wall or the outer wall is not chemically cross-linked, they will be dissolved in aqueous solutions with different pH conditions, thus losing the capsule shape and encapsulation. Especially in the printing and dyeing process of textiles, the printing and dyeing solution will be adjusted according to the requirements of the dye. Alkaline or acidic, it is difficult to ensure the effectiveness of this double-walled essence microcapsule; in addition, the patent does not mention the size of the capsule, if the capsule size is too large, the effective time of adhesion on the surface of the fabric will be reduced. Significantly shortened, the number of washing resistance will be greatly reduced

Method used

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  • Preparation method of essence microcapsules
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Examples

Experimental program
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Effect test

Embodiment 1

[0033] The chitosan that molecular weight is 800,000 is dissolved in the acetic acid solution that mass concentration is 1% is the chitosan acetic acid solution that the mass concentration of chitosan is prepared into; 0.25g HLB value is 14.9 Tween 60 and Add 5g of rose essence to 100g of the above-mentioned chitosan acetic acid solution, emulsify and disperse at a high speed of 8000 rpm for 10 minutes to obtain chitosan essence emulsion; add 1g of sodium alginate and 0.1g of sodium tripolyphosphate to 48.9ml of aqueous solution Dissolve evenly in the medium, and add it dropwise to the above-mentioned chitosan essence emulsion at a speed of 0.5ml per minute. During this process, the stirring speed of the system is kept at 500 revolutions per minute; The NaOH solution adjusted the pH value of the system to 5 to obtain coagulated essence microcapsules; under the same stirring speed, 0.1g epichlorohydrin was added to the above-mentioned agglomerated essence microcapsule system, an...

Embodiment 2

[0035]The molecular weight is 40,000 chitosan dissolved in the acetic acid solution that the mass concentration is 3% and the mass concentration of chitosan is prepared to be the chitosan acetic acid solution of 3%; Add the essence to 100g of the above-mentioned chitosan acetic acid solution, emulsify and disperse at a high speed at 15,000 rpm for 20 minutes to obtain the chitosan essence emulsion; add 2.5g of sodium alginate and 0.6g of sodium tripolyphosphate to deionized water for configuration into a 50g aqueous solution, and dropwise added to the above-mentioned chitosan flavor emulsion at a rate of 5ml per minute, the process keeps the stirring speed of the system at 1000 revolutions per minute; NaOH solution adjusted the pH value of the system to 7 to obtain agglomerated essence microcapsules; under the same stirring speed, 1.1 g of glutaraldehyde was added to the above-mentioned agglomerated essence microcapsule system, and the essence microcapsules were chemically cros...

Embodiment 3

[0037] It is the chitosan acetic acid solution of 1.8% that the mass concentration that is prepared into chitosan is that 400,000 chitosan is dissolved in the acetic acid solution that mass concentration is 2% by mass concentration; 2.16g cetearyl ether-20 and 27g Add pineapple essence to 100g of the above-mentioned chitosan acetic acid solution, emulsify and disperse at high speed for 30 minutes at 13,000 rpm to obtain chitosan essence emulsion; add 4.5g of sodium alginate and 0.25g of sodium tripolyphosphate into deionized water It is configured into 100g aqueous solution, and is added dropwise to the above-mentioned chitosan flavor emulsion at a speed of 3ml per minute. During this process, the stirring speed of the system is kept at 800 revolutions per minute; The pH value of the NaOH solution adjustment system is 6, and the agglomerated essence microcapsules are obtained; under the same stirring speed, 0.95g glutaraldehyde is added to the above-mentioned agglomerated essen...

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Abstract

The invention discloses a preparation method of essence microcapsules. The preparation method comprises the following steps: (1) dissolving chitosan in acetum; (2) adding emulsifier and essence into the chitosan acetum for high-speed emulsification and dispersion to obtain the chitosan essence emulsion; (3) adding the mixed solution of sodium alginate and sodium tripolyphosphate dropwise into the chitosan essence emulsion; (4) adjusting the pH value of the system to 5-7 with NaOH solution to obtain the condensed essence microcapsules; and (5) adding cross-linking agent into the condensed essence microcapsule system to perform chemical cross-linking process on the condensed essence microcapsules to obtain the essence microcapsules. For the essence microcapsules prepared according to the method disclosed by the invention, as chemical cross-linking process is implemented on the walls of the capsules, the density of the capsule walls and the resistance to the solution alkalinity/acidity are improved, and the application stability of the essence microcapsules is increased; moreover, with small size, the capsules can easily permeate into textile fiber, and the water-washing resistance of the textile fiber is greatly improved.

Description

technical field [0001] The invention relates to a preparation method of essence microcapsules. Background technique [0002] The long-lasting fragrance of cotton fabrics is becoming a very promising variety of functional cotton fabrics, especially as underwear products are being more and more sought after, the price is expensive, the product has high added value and strong competitiveness. The aroma of fragrance is the "soul" of fragranced products, but because most of the components in fragrance are highly volatile, sensitive to light, heat and oxygen, they are easy to react with other components, and the volatility causes the fragrance to gradually disappear , For products that require long-lasting aroma, direct application of essence and aroma cannot meet the demand. Therefore, people are eager to find a method that can protect flavor substances well, improve their stability and processability. Microcapsule technology is a technology that completely encapsulates unifor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/14C11B9/00D06M23/12D06M15/03D06M101/06
Inventor 石光李志诚黄杨罗穗莲林立
Owner 广州市戴文高分子材料科技有限公司
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