Self-adhesive long-acting slow-release essential oil microcapsule and preparation method and application thereof

Abstract

The invention discloses a self-adhesive long-acting slow-release essential oil microcapsule and a preparation method and an application thereof. The method comprises the following steps of: uniformly mixing essential oil, a reaction monomer, an auxiliary emulsifying agent, oil-soluble initiator and a newly-added oil-soluble crosslinking agent to obtain an essential oil / monomer mixed solution; adding an aqueous solution of an emulsifying agent; pre-emulsifying in a shearing and stirring state for 10-20 minutes; performing ultrasonic dispersion in an ice-water bath to obtain a fine emulsified liquid; and performing a polymerization reaction on the fine emulsified liquid in a nitrogen atmosphere in a shearing and stirring state at the temperature of 65-70 DEG C for 3-6 hours, and cooling after finishing reaction to obtain self-adhesive long-acting slow-release essential oil microcapsule rubber latex. The preparation method has the advantages of ready availability of raw materials, simple process, high good controllability over the morphological structure of the microcapsule, no relevance to organic solvents and suitability for industrial production; and the prepared microcapsule has high structural strength, a good slow release effect, and high self-adhesive properties on substrates such as fibers and the like. The invention further discloses a self-adhesive long-acting slow-release essential oil microcapsule and an application thereof.

Description

technical field [0001] The invention relates to the field of microcapsules, in particular to a self-adhesive long-acting sustained-release essential oil microcapsule and a preparation method and application thereof. Background technique [0002] Essential oils have the functions of nourishing the skin, soothing irritability, improving sleep, promoting blood circulation, and enhancing functional immunity. They are used in the aromatic finishing of silk and other high-end textiles, and can endow underwear, pillow covers, pajamas, ties and other fabrics with soothing, calming, hypnotic, Even physical therapy and other health benefits. However, it is highly volatile and easily oxidized in the air, so the effect cannot be sustained. [0003] Microencapsulating the essential oil can reduce the influence of the external environment on its deterioration by isolating the contact with the external environment, so that the essential oil has better stability; It is convenient to reali...

AI Technical Summary

Problems solved by technology

The above-mentioned microcapsule wall materials based on the interfacial polycondensation reaction are prone to produce harmful substances such as formaldehyde, which is not only harmful to the environment and human health, but also changes the aroma quality of essential oils

[0005] In addition, the essential oil microcapsules made by existing conventional methods also have the following problems when they are applied to the aroma finishing of fabrics: 1. Most of the microcapsule particles are more than 10 μm, which is not conducive to microcapsules and essential oil droplets in the micron fabric fiber surface Uniform dispersion, thin spreading and effective fixation

2. The prepared microcapsule wall material is often rigid and cannot be directly attached to the surface of the fabric. Therefore, it needs to be fixed by the continuous film-forming effect of a large amount of adhesives during fabric finishing, which not only easily destroys the original properties of the fabric (such as hand feeling), And seriously affect the sustained release effect of essential oils

However, there is no report on the preparation of self-adhesive essential oil microcapsules by in-situ polymerization.

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