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Slow-release essence microcapsule and preparation method thereof

A flavor microcapsule and slow-release technology, which is applied in the field of daily chemical industry, can solve the problems of sensitivity, fragrance retention period cannot be guaranteed, flavor is easy to volatilize, etc., and achieve the effect of increasing solubility, slowing down the loss of rapid volatilization, and low cost

Active Publication Date: 2016-08-10
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, since the fragrance is easy to volatilize and is sensitive to light and heat, if it is directly added to daily products, the retention period of the fragrance cannot be guaranteed

Method used

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  • Slow-release essence microcapsule and preparation method thereof
  • Slow-release essence microcapsule and preparation method thereof
  • Slow-release essence microcapsule and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of β-cyclodextrin / paraffin inclusion compound suspension

[0030] Accurately weigh 4.5g of β-cyclodextrin and 0.5g of paraffin into a round-bottomed flask, slowly add 90g of deionized water, stir at 40°C at 600rpm for 0.5h to completely clathrate β-cyclodextrin and paraffin, and cool Obtain β-cyclodextrin / paraffin inclusion compound suspension.

[0031] (2) Preparation of mixed oil phase

[0032] Accurately weigh 9 g of n-octadecane, 3 g of orange oil essence, 10 g of methyl methacrylate, and 0.11 g of azobisisobutyrocyanide in a round bottom flask, and stir at 35° C. at 250 rpm for 0.5 h to obtain a mixed oil phase.

[0033] (3) Preparation of Pickering emulsion

[0034] Add the suspension in step (1) completely dropwise to the mixed oil phase in step (2), and stir at 40°C at 800rpm for 1 hour, so that the mixed oil phase can react under the action of β-cyclodextrin / paraffin clathrate The Pickering emulsion is obtained by uniformly dispersing in wate...

Embodiment 2

[0040] (1) Preparation of γ-cyclodextrin / beeswax clathrate suspension

[0041]Accurately weigh 4g of γ-cyclodextrin and 0.8g of beeswax into a round-bottom flask, slowly add 60g of deionized water, stir at 80°C and 800rpm for 1 hour, make the inclusion of γ-cyclodextrin and beeswax complete, and cool to obtain γ-cyclodextrin - Cyclodextrin / beeswax clathrate suspension.

[0042] (2) Preparation of mixed oil phase

[0043] Accurately weigh 10g of white oil, 1g of lily essence, 18g of butyl methacrylate, 2g of trimethylolpropane triacrylate, and 0.2g of benzoyl peroxide in a round bottom flask, and stir at 20°C at 600rpm for 0.25h, A mixed oily phase was obtained.

[0044] (3) Preparation of Pickering emulsion

[0045] Add the suspension in step (1) dropwise to the mixed oil phase in step (2), stir at 20°C at 1000rpm for 0.5h, make the mixed oil phase in the γ-cyclodextrin / beeswax clathrate Under the action, it is uniformly dispersed in water in the form of small droplets to ...

Embodiment 3

[0051] (1) Preparation of α-cyclodextrin / palm wax clathrate suspension

[0052] Accurately weigh 4.8g of α-cyclodextrin and 0.8g of palm wax into a round bottom flask, slowly add 85g of deionized water, and stir at 900rpm at 65°C for 1.25h to completely clathrate α-cyclodextrin and palm wax. Cool to obtain α-cyclodextrin / palm wax clathrate suspension.

[0053] (2) Preparation of mixed oil phase

[0054] Accurately weigh 20g of sunflower oil, 4g of rose essence, 6g of methyl acrylate, 4g of lauryl methacrylate, and 0.1g of benzoyl peroxide in a round bottom flask, and stir at 50°C at 400rpm for 0.16h to obtain a mixed oil Mutually.

[0055] (3) Preparation of Pickering emulsion

[0056] Add the suspension in step (1) dropwise to the mixed oil phase in step (2), stir at 50°C at 700rpm for 0.75h, and make the mixed oil phase in the α-cyclodextrin / palm wax clathrate Under the action of the action, it is uniformly dispersed in water in the form of small droplets to obtain a Pic...

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Abstract

The invention relates to a slow-release essence microcapsule and a preparation method thereof. The slow-release essence microcapsule comprises a core material (1), polyacrylate (2) and an emulsifier (3). The emulsifier (3) is carried by the outer wall of the polyacrylate (2). The polyacrylate (2) and the emulsifier (3) form a continuous capsule composite wall and the composite wall wraps the core material (1) so that the coated essence microcapsule is obtained. The core material (1) comprises essence, an organic carrier and initiator residues. The emulsifier (3) is a clathrate compound of cyclodextrin and wax. The polyacrylate (2) is prepared from an acrylate monomer and an initiator through polymerization. A mass ratio of cyclodextrin to wax is 1: (0.1-0.2). A mass ratio of the organic carrier, cyclodextrin, essence, acrylate monomer to initiator is 1: (0.2-0.6): (0.01-1): (0.5-2): (0.004-0.02). The slow-release essence microcapsule effectively improves fragrance endurance and feel comfortableness and has the characteristics of environmental friendliness, no toxicity, good mechanical strength and good heat resistance.

Description

technical field [0001] The invention relates to an essence microcapsule with slow-release effect and a preparation method thereof, belonging to the field of daily chemical industry. Background technique [0002] Essence is a concentrated aromatic oil that is artificially synthesized to imitate the smell of fruits and natural spices. Its chemical components are mainly alcohols, ethers, aldehydes, ketones and ester aromatic compounds. Fragrance can work through the human body's sense of smell and touch, inhaled by the respiratory system and skin, enter the pituitary gland, and adjust the body's endocrine, thereby adjusting the body and mind, restoring coordination of the body and mind, and eliminating emotions such as depression, anxiety, and depression. tiredness. In addition, aroma can also play a role in purifying the air and optimizing the environment. [0003] However, since the essence is easy to volatilize and is sensitive to light and heat, if it is directly added to...

Claims

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Application Information

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IPC IPC(8): C11B9/00B01J13/02
CPCB01J13/02C11B9/00
Inventor 陈洪龄张瑜
Owner NANJING UNIV OF TECH
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