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Preparation method of intelligent controlled release essence capsule

A flavor capsule and intelligent control technology, which is applied in the direction of microcapsule preparation, microsphere preparation, essential oil/fragrance, etc., can solve the problems of single function and reduction, achieve objective application prospects, avoid sudden release, and prolong the effective time

Inactive Publication Date: 2015-01-28
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the single function of the existing fragrance capsule wall material and endow the capsule with an environmental temperature response function, the present invention provides a preparation method for an intelligently controlled release fragrance capsule with a temperature response function, using crystallizable side chains The comb polymer is used as the capsule wall, and the comb polymer with different side chain crystallization temperature is selected according to the actual use environment temperature. The crystallization of the side chain of the comb polymer leads to the increase of the free volume between the macromolecular chains, which makes the essence molecules of the capsule core more easily If the comb-like polymer side chains are in a disordered state, the free volume between the macromolecular chains will become smaller, making it difficult for the essence molecules in the capsule core to pass through, and the fragrance release rate will be greatly reduced.

Method used

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  • Preparation method of intelligent controlled release essence capsule
  • Preparation method of intelligent controlled release essence capsule

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Weigh 200g of cetyl acrylate, 2g of azobisisobutyronitrile and 200g of lavender essential oil and mix them uniformly to obtain an oil phase solution.

[0018] (2) Pour the above oil phase solution into 5kg of styrene-maleic anhydride copolymer salt solution with a mass concentration of 5wt%, and high-speed shear emulsification to prepare a stable emulsion with a particle size of about 10 μm.

[0019] (3) Stir the stable emulsion obtained in step (2) at a stirring speed of 500rpm, and at the same time raise the temperature to 75°C to initiate polymerization, and keep it for 3 hours to obtain a fragrance capsule with polyhexadecyl acrylate as the capsule wall suspension. After the suspension is filtered, washed and dried, capsule powder can be obtained.

[0020] figure 1 For the prepared polyhexadecyl acrylate aromatic capsules, it can be seen that the particle size distribution of the spherical capsules is in the range of 4 μm to 20 μm, and the average particle siz...

Embodiment 2

[0022] (1) Weigh 1 kg of stearyl acrylate, 100 g of azobisisoheptanonitrile and 10 kg of benzyl benzoate and mix them uniformly to obtain an oil phase solution.

[0023] (2) Pour the oil phase solution in step (1) into 60 kg of gelatin solution with a mass concentration of 10 wt%, and high-speed shear emulsification to prepare a stable emulsion with an average particle size of about 50 μm.

[0024] (3) The stable emulsion obtained in step (2) is heated to 65° C. to initiate polymerization under stirring at 1000 rpm, and kept for 3 hours to obtain a suspension of essence capsules with polyoctadecyl acrylate as the capsule wall. After the suspension is filtered, washed and dried, capsule powder can be obtained.

Embodiment 3

[0026] (1) Weigh 6 kg of tetracosyl methacrylate, 600 g of benzoyl peroxide and 10 kg of jasmine oil and mix them uniformly to obtain an oil phase solution.

[0027] (2) Pour the above oil phase solution into 100kg of OP-10 solution with a mass concentration of 10wt%, and high-speed shear emulsification to prepare a stable emulsion with an average particle size of about 20 μm.

[0028] (3) Heat the stable emulsion obtained in step (2) to 85° C. to initiate polymerization under stirring at 10 rpm, and keep it for 3 hours to obtain a suspension of essence capsules with polytetracosyl acrylate as the capsule wall. After the suspension is filtered, washed and dried, capsule powder can be obtained.

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Abstract

The invention provides a preparation method of an intelligent controlled release essence capsule with an ambient temperature response function. The preparation method comprises the following steps: (1) fully stirring and dissolving (methyl) alkyl acrylate monomers with different alkyl chain lengths, an oil-soluble initiator and essence to prepare a homogeneous oil phase; (2) adding the prepared organic oil into an aqueous solution containing an emulsifier for full stirring and shearing emulsification to obtain emulsified drops with the particle size of 10nm-5mm; (3) heating emulsion to generate polymerization reaction by the (methyl) alkyl acrylate monomers to form essence-wrapped capsule wall, and performing filtering and washing to obtain the essence capsule with a nuclear shell structure. The synthesis technology is simple, and the energy consumption is low; the requirement on equipment is low, and reaction conditions are easy to control; the preparation method has a large-scale production prospect. The capsule capable of intelligently adjusting the release speed has a great application prospect in the field of cosmetics and the field of intelligent heat storage and temperature adjustment textiles.

Description

technical field [0001] The invention relates to a method for preparing an essence capsule, in particular to a method for preparing an intelligently controlled release essence capsule with an environmental temperature response function. Background technique [0002] Encapsulation technology is used to wrap the essence to make aromatic capsules with a particle size of 10nm~5mm, which avoids direct contact between the essence and the outside world, thereby achieving the purpose of inhibiting the essence from volatilizing too quickly and controlling the release speed of the essence. In addition, aroma capsules can avoid the "burst effect" and prolong the duration of fragrance. Fragrance capsules are widely used in the textile industry and also in daily cosmetics. At present, some people have prepared aromatic microcapsules with melamine-formaldehyde resin as the capsule wall by in-situ polymerization. This method has simple preparation process and low cost, but formaldehyde wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/14C11B9/00
CPCC11B9/00B01J13/14
Inventor 李伟宗记文张袁凯马艳杰张兴祥
Owner TIANJIN POLYTECHNIC UNIV
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