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Method for preparing nano rose essence capsules

A technology of essence capsules and nano roses, which is applied in the preparation of microspheres, microcapsule preparations, essential oils/flavors, etc., can solve the problems that the aroma of end products is not stable enough, the fragrance holding time is short, and achieve good biodegradability and compatibility. The effect of stability, aroma stability and uniform particle size distribution

Inactive Publication Date: 2010-09-01
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large amount of volatile terpenes contained in rose essence, the problems of insufficient fragrance stability and short duration of fragrance of the end product have not been resolved.

Method used

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  • Method for preparing nano rose essence capsules
  • Method for preparing nano rose essence capsules
  • Method for preparing nano rose essence capsules

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] The preparation method of described nano-rose sustained-release essence capsule comprises the following steps:

[0021] a. Mix 0.3-0.8% by weight of rose essence and 2.0-3.2% by weight of polyoxyethylene (20) sorbitan monolaurate, stir for five minutes under 1100rpm magnetic stirring, and slowly inject deionized water along the beaker wall water, stirring magnetically until a homogeneous emulsion forms. Then adjust the pH value of the system to 2.0 with a 1mol / L hydrochloric acid solution;

[0022] b. Slowly add 0.6-1.6 weight percent n-butyl cyanoacrylate into the emulsion prepared in step a at a rate of 3 drops / min under stirring. After the dropwise addition is completed, react for 2 to 4 hours under stirring conditions, adjust the pH value of the system to 7.0 with 1 mol / L sodium hydroxide solution, and react for 0.5 hours under stirring conditions until the reaction is terminated.

Embodiment 1

[0024] In the beaker, add the rose essence of 0.6 weight percent and the polyoxyethylene (20) sorbitan monolaurate of 2.6 weight percent, mix and fully stir five minutes under the speed of magnetic stirring 1100rpm, and slowly add in the beaker Ionized water, continue to stir at the same speed until the emulsion is uniform. Then slowly add 1mol / L hydrochloric acid solution dropwise under magnetic stirring to adjust the pH value of the system to 2.0, then slowly add 1.2% by weight of n-butyl cyanoacrylate, stir while dropping, after the dropwise addition is completed, close the bottle mouth, Continue to stir to make it fully polymerized, terminate the reaction after 4 hours, adjust the pH value of the system to 7.0 with 1mol / L sodium hydroxide solution, and continue to stir for 0.5 hours to prepare the nano-rose essence capsule emulsion.

[0025] The nano-flavor capsule emulsion was obtained in the experiment, and the system existed stably, but the blue light phenomenon was not...

Embodiment 2

[0027] Add 0.8% by weight of rose essence and 2.0% by weight of polyoxyethylene (20) sorbitan monolaurate in the beaker, mix and fully stir for five minutes at a speed of 1100rpm with magnetic stirring, and slowly add to the beaker Ionized water, continue to stir at the same speed until the emulsion is uniform. Then slowly add 1mol / L hydrochloric acid solution dropwise under magnetic stirring to adjust the pH value of the system to 2.0, then slowly add 1.6% by weight of n-butyl cyanoacrylate, stir while dropping, after the dropwise addition is completed, close the bottle mouth, Continue to stir to make it fully polymerized, terminate the reaction after 2 hours, adjust the pH value of the system to 7.0 with 1mol / L sodium hydroxide solution, and continue to stir for 0.5 hours to prepare the nano-rose essence capsule emulsion.

[0028] The experiment obtained the nano essence capsule emulsion with blue light, and the system existed stably. After being tested by a dynamic laser l...

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Abstract

The invention discloses a method for preparing nano rose essence capsules, which comprises the following steps of: a, mixing 0.3 to 0.8 weight percent of rose essence and 2.0 to 3.2 weight percent of polyoxyethylene (20) sorbitan monolaurate, stirring the mixture at the rotation speed of 1,100rpm, adding deionized water into the mixture and stirring to form a uniform emulsion; and b, dripping 0.6 to 1.6 weight percent of N-butyl cyanoacrylate into the emulsion, reacting for 2 to 4 hours, adjusting the pH value of the system with 1mol / L solution of sodium hydroxide to 7.0, and continuously reacting for 0.5 hour until the reaction is completed. The nano rose essence capsules prepared by the emulsion polymerization method of the invention have an average particle size of 91nm and a peak width of 16.8nm, have uniform particle size distribution and can be applied to goods for everyday consumption, such as textiles, cosmetics and detergents and the like.

Description

technical field [0001] The invention relates to a preparation method of rose-flavored essential oil or fragrance sample, and more specifically relates to a method for preparing nanometer rose essence capsules by emulsion polymerization. Background technique [0002] Rose essence is an important additive that is deeply loved by consumers. It is currently mainly used in daily consumer products such as textiles, cosmetics, and detergents, and rose fragrance plays a vital role in the quality of end products. However, because the rose essence contains a large amount of volatile terpenes, the problems such as the fragrance of the end product is not stable enough and the duration of the fragrance is short have not been solved. At home and abroad, the research on improving the aroma stability of flavors only stays in the microencapsulation technology, and the particle size of flavors can reach 3-500 μm. Due to the small size of nanocapsules, it is easy to disperse and suspend in wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02C11B9/00
Inventor 肖作兵胡静周如隽牛云蔚马双双戴水平
Owner SHANGHAI INST OF TECH
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