Preparation method of micro-emulsified composite plant essential oil rice preservative

Abstract

The invention relates to a preparation method of a micro-emulsified composite plant essential oil rice preservative. The preparation method comprises the following steps: respectively extracting single plant essential oil of lilac, rosemary leaves, eucalyptus globulus leaves, thyme leaves, cinnamon bark, garlic seeds and litsea cubeba; mixing single plant essential oil into composite plant essential oil; preparing a composite surfactant; and mixing the composite plant essential oil with the composite surfactant, and carrying out micro-emulsification. The rice preservative has a broad-spectrumantibacterial effect on fungi causing rice mildewing, and the antibacterial effect of the rice preservative is superior to that of single plant essential oil; the mildew of the rice can be greatly reduced, the fresh-keeping period of the rice is prolonged, and meanwhile, the sensory quality of the rice is not influenced; meanwhile, the sensory quality of the rice is not influenced; the essential oil extraction method disclosed by the invention has a relatively high essential oil yield; cost is low, use is convenient, and pollution is avoided; the method has good effects of improving the safetyof grain storage and promoting the healthy and sustainable development of the plant essential oil industry, and has remarkable economic, social and ecological benefits.

Description

technical field [0001] The invention relates to a preparation method of a plant essential oil rice preservative, in particular to a preparation method of a microemulsified plant essential oil rice preservative. Background technique [0002] rice ( Oryza sativa L.) is one of the most important staple foods in my country, and about 67% of the residents take rice as their staple food. [0003] Rice contains a certain amount of fungi, and with the prolongation of storage time, the fungi multiply and cause rice mildew, Penicillium shima ( Penicillium islandicum ) and Aspergillus flavus ( Aspergillus flavus ) are the main harmful fungi growing in stored rice. It is of great significance to alleviate and inhibit the occurrence of mildew during rice storage, improve its food safety, and reduce the loss of food resources. [0004] Controlling the storage temperature and relative humidity of rice is one of the effective ways to prevent mildew, but controlling the storage temper...

AI Technical Summary

Problems solved by technology

The surfactants and co-surfactants added to the microemulsion are easy to form a microemulsion system spontaneously due to the negative interfacial tension, but the microemulsion system also has the problem of being difficult to maintain stability for a long time

Moreover, the components of plant essential oils are complex, and the formation of microemulsion systems is closely related to the components of plant essential oils. The interfacial tensions of plant essential oil microemulsion systems with different components are greatly different, which makes it difficult to optimize the steady-state system of microemulsified plant essential oils, and the related research progress is slow; The research on microemulsion of plant essential oil and its antibacterial activity has only been reported in individual literature so far

Zhou Hanjun ("Research on Extraction, Nanoemulsion and Antibacterial Activity of Eucalyptus Essential Oil", Master's Thesis, 2016) used a composite surfactant composed of polyoxyethylene castor oil 30 and absolute ethanol to mix with eucalyptus essential oil and distilled water in a certain proportion Eucalyptus essential oil nanoemulsion was prepared, but the preparation method cannot guarantee continuity, the production efficiency is low, and the antibacterial effect of the obtained eucalyptus essential oil nanoemulsion needs to be improved

The preparation method of the microemulsified rice preservative compounded by various plant essential oils has not been reported yet