Lemon grass essential oil hydrogel, and preparation method and application thereof

By preparing lemongrass essential oil hydrogels, lemongrass essential oil was stably encapsulated using a cross-linked network of 2-propoxy-β-cyclodextrin, sodium alginate, and calcium chloride. This solved the problems of volatility and irritation of lemongrass essential oil during potato storage, and achieved effective sprout suppression and preservation effects.

CN122162838APending Publication Date: 2026-06-09QILU UNIVERSITY OF TECHNOLOGY (SHANDONG ACADEMY OF SCIENCES)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
QILU UNIVERSITY OF TECHNOLOGY (SHANDONG ACADEMY OF SCIENCES)
Filing Date
2026-03-05
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Lemongrass essential oil is volatile and unstable during potato storage, resulting in insufficient duration of sprout inhibition effect. At the same time, direct contact with potatoes may cause skin burns and local necrosis, and there is a risk of chemical sprout inhibitor residue.

Method used

Lemongrass essential oil hydrogel is used, which stably encapsulates lemongrass essential oil through a cross-linking network of 2-propionic-β-cyclodextrin, sodium alginate, and calcium chloride, forming a uniformly dispersed emulsion that avoids direct contact and controls release.

Benefits of technology

It prolongs the release time of lemongrass essential oil, effectively inhibits potato sprouting, reduces nutrient loss, avoids pesticide damage, and provides a green and safe sprout-inhibiting and preservation effect.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application belongs to the technical field of hydrogel, and particularly relates to a lemon grass essential oil hydrogel, a preparation method thereof and application. The lemon grass essential oil hydrogel composition is composed of the following components in percentage by mass: lemon grass essential oil 10-12%, sodium alginate 2-12%, 2-propyl hydroxy-beta-cyclodextrin 2-5%, castor oil polyoxyethylene ether 0.1-0.3%, crosslinking agent 1.0-3.5%, and deionized water in remainder. The lemon grass essential oil hydrogel prepared by the present application can not only prolong the release time of the lemon grass essential oil through the slow-release effect, avoid the direct contact of the essential oil or the high local concentration of the essential oil to cause the damage of the potato, but also effectively inhibit and delay the sprouting of the potato in the storage and logistics process, reduce the nutrient loss of the potato, and better achieve the preservation effect.
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Claims

1. A lemongrass essential oil hydrogel composition, characterized in that, By weight percentage, it consists of the following components: 10-12% lemongrass essential oil, 2-12% sodium alginate, 2-5% 2-propionic-β-cyclodextrin, 0.1-0.3% castor oil polyoxyethylene ether, 1.0-3.5% crosslinking agent, and the balance deionized water.

2. The lemongrass essential oil hydrogel composition according to claim 1, characterized in that, By weight percentage, it consists of the following components: lemongrass essential oil 11-11.5%, sodium alginate 2-5%, 2-propionic-β-cyclodextrin 2-3%, castor oil polyoxyethylene ether 0.15-0.25%, crosslinking agent 1.5-2.5%, and deionized water as the balance.

3. The lemongrass essential oil hydrogel composition according to claim 1, characterized in that, The castor oil polyoxyethylene ether has an HLB value of 12-14; the crosslinking agent is calcium chloride.

4. A lemongrass essential oil hydrogel, characterized in that, It is prepared from the lemongrass essential oil hydrogel composition according to any one of claims 1-3.

5. The lemongrass essential oil hydrogel according to claim 4, characterized in that, It includes a hydrogel matrix and active components embedded therein; the active components include 2-propionic acid-β-cyclodextrin and lemongrass essential oil loaded therein; the encapsulation rate of the active components is 80-85%.

6. A method for preparing the lemongrass essential oil hydrogel according to claim 4 or 5, characterized in that, Includes the following steps: (1) Dissolve sodium alginate and 2-propoxy-β-cyclodextrin separately in water and stir to prepare a mixed solution; (2) After degassing the mixed solution, castor oil polyoxyethylene ether is added, and emulsification and settling are carried out to obtain an emulsified matrix; (3) Add lemongrass essential oil to the emulsion matrix, emulsify and let stand to obtain a white emulsion; (4) Add the white emulsion to the calcium chloride aqueous solution to carry out the cross-linking reaction. After washing and drying, lemongrass essential oil hydrogel is obtained.

7. The method for preparing lemongrass essential oil hydrogel according to claim 6, characterized in that, The emulsification time in step (2) is 10-15 min, and the emulsification time in step (3) is 10-15 min. In step (2) or step (3), the settling temperature is 3-5℃ and the time is 20-40 min; The cross-linking reaction in step (4) takes 40-90 min; the solvent used for washing is deionized water.

8. The use of the lemongrass essential oil hydrogel according to claim 4 or 5 in a potato sprout inhibitor.

9. A potato sprout inhibitor, characterized in that, The product contains the lemongrass essential oil hydrogel as described in claim 4 or 5.

10. A method for inhibiting potato sprouting, characterized in that, The lemongrass essential oil hydrogel of claim 4 or 5 is applied inside a potato package; the mass ratio of potato to lemongrass essential oil hydrogel is 1:(0.0075-0.0085); the potato is a potato that has passed its dormancy period.