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Polyurethane peppermint oil microcapsule and preparation method thereof

A technology of peppermint oil and microcapsules, which is applied in the field of polyurethane peppermint oil microcapsules and its preparation, can solve problems such as volatilization instability and loss of peppermint oil, and achieve improved environmental tolerance and good biocompatibility , the effect of uniform particle size

Inactive Publication Date: 2020-09-08
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: the technical problem of the loss caused by volatilization and instability when existing peppermint oil is in use

Method used

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  • Polyurethane peppermint oil microcapsule and preparation method thereof
  • Polyurethane peppermint oil microcapsule and preparation method thereof
  • Polyurethane peppermint oil microcapsule and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The raw material formula of polyurethane peppermint oil microcapsules is as follows:

[0035]

[0036] The concrete steps of the preparation method of polyurethane peppermint oil microcapsules:

[0037] (a) Dissolve gum arabic in deionized water to make a gum arabic solution; then weigh the isocyanate prepolymer and peppermint oil, mix it with magnetic stirring at 400r / min for 2min, and ultrasonicate for 1min to obtain the isocyanate prepolymer- peppermint oil mixed oil phase;

[0038] (b) Add the gum arabic solution prepared in step a to the oil phase prepared in step a at a rate of 30mL / h, mix for 10min under magnetic stirring at 300r / min; then ultrasonically crush the cells for 10min to obtain the isocyanate prepolymer-pepper sample O / W emulsion of peppermint oil-gum arabic;

[0039] (c) Weighing the polysaccharide and dissolving it in deionized water to obtain a polysaccharide solution;

[0040] (d) Under magnetic stirring at 800r / min, add the polysaccharide s...

Embodiment 2

[0045] The raw material formula of polyurethane peppermint oil microcapsules is as follows:

[0046]

[0047] The concrete steps of the preparation method of polyurethane peppermint oil microcapsules:

[0048](a) Take gum arabic and dissolve it in deionized water to make a gum arabic solution; then weigh the isocyanate prepolymer and peppermint oil, mix it with magnetic stirring at 600r / min for 2min, and ultrasonicate it for 2min to obtain the isocyanate prepolymer- peppermint oil mixed oil phase;

[0049] (b) Add the gum arabic solution prepared in step a to the oil phase prepared in step a at a rate of 50 mL / h, and mix for 10 minutes under magnetic stirring at 500 r / min; then ultrasonically crush the cells for 10 minutes to obtain the isocyanate prepolymer-pepper O / W emulsion of peppermint oil-gum arabic;

[0050] (c) Weighing the polysaccharide and dissolving it in deionized water to obtain a polysaccharide solution;

[0051] (d) Under magnetic stirring at 800r / min, a...

Embodiment 3

[0055] The raw material formula of polyurethane peppermint oil microcapsules is as follows:

[0056]

[0057] The concrete steps of the preparation method of polyurethane peppermint oil microcapsules:

[0058] (a) Dissolve gum arabic in deionized water to make a gum arabic solution; then weigh isocyanate prepolymer and peppermint oil, mix for 2min under magnetic stirring at 500r / min, and ultrasonically for 1min to obtain isocyanate prepolymer- Peppermint oil mixed oil phase;

[0059] (b) Add the gum arabic solution prepared in step a to the oil phase prepared in step a at a rate of 50 mL / h, and mix for 10 min under magnetic stirring at 500 r / min; then ultrasonically crush the cells for 10 min to obtain the isocyanate prepolymer-pepper sample O / W emulsion of peppermint oil-gum arabic;

[0060] (c) Weighing the polysaccharide and dissolving it in deionized water to obtain a polysaccharide solution;

[0061] (d) Under magnetic stirring at 800r / min, add the polysaccharide so...

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Abstract

The invention discloses a polyurethane peppermint oil microcapsule and a preparation method thereof. The raw materials comprise polyisocyanates, peppermint oil, Arabic gum, polysaccharides and the like. The preparation method comprises the following steps: uniformly mixing the polyisocyanates with the peppermint oil to obtain an oil phase; uniformly mixing Arabic gum with deionized water to obtaina water phase; slowly adding the water phase into the oil phase, and carrying out assisted emulsification by using an ultrasonic cell disruptor to obtain an oil-in-water stable emulsion containing peppermint oil; adding a polysaccharide solution into the emulsion under heating and stirring conditions, and reacting to obtain a suspension; centrifuging, decanting, filtering, washing and drying thesuspension in sequence to collect the polyurethane peppermint oil microcapsules. The polyurethane peppermint oil microcapsule prepared by adopting the method is compact in shell layer, environment-friendly in raw material, free of any organic solvent and easy to process, and meanwhile, the problem of poor biocompatibility of a common polyurethane microcapsule is expected to be solved, and the application range of peppermint oil in various fields is expanded.

Description

technical field [0001] The invention relates to a polyurethane peppermint oil microcapsule and a preparation method thereof, belonging to the field of fine chemicals. Background technique [0002] Peppermint is a plant of the genus Mentha of the Labiatae family. It is pungent in taste and cool in nature. It has the functions of dispelling wind and cooling, clearing the head, benefiting the throat, antibacterial and anti-inflammatory, and enhancing immunity. It is widely used in Chinese herbal medicine formulas. Peppermint oil is a yellow-green or yellow oily liquid extracted from peppermint (Mentha x piperita L.), which has a special mint aroma. In addition to its high medicinal value, peppermint oil is also widely used in the production of cosmetics, perfume, toothpaste and oral hygiene products, cigarettes and soap. However, the main components of peppermint oil are highly volatile and unstable in environments such as light, oxygen, high temperature and humidity, which ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/16C08G18/64C08G18/32C08G18/65
CPCB01J13/16C08G18/6484C08G18/3206C08G18/6517
Inventor 胡静张薇薇包晓丽何磊顾佳颖
Owner SHANGHAI INST OF TECH
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