CN105694117A - Ginger oil nano emulsion and preparation method of ginger oil nano emulsion - Google Patents
Ginger oil nano emulsion and preparation method of ginger oil nano emulsion Download PDFInfo
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Abstract
The invention discloses ginger oil nano emulsion and a preparation method of the ginger oil nano emulsion. The ginger oil nano emulsion is prepared from the following raw materials: ginger oil, an emulsifying agent and de-ionized water, wherein the mass ratio of the ginger oil to the emulsifying agent to the de-ionized water is (80 to 100):(90 to 110) to 1000; the emulsifying agent is starch sodium octenylsuccinate; the ginger oil is a mixture of ginger essential oil and ginger oil resin at the mass ratio of 1 to 1. According to the preparation method disclosed by the invention, ginger power is extracted through supercritical CO2 and is processed to obtain the ginger oil; after the ginger oil, the starch sodium octenylsuccinate and the de-ionized water are sheared and mixed to obtain crude emulsion; the crude emulsion is subjected to ultrasonic treatment to obtain the ginger oil nano emulsion. The ginger oil nano emulsion disclosed by the invention has a relatively good antibacterial capability, and can be used as a potential food antibacterial agent or emulsifying essence to be applied to the field of foods.
Description
Technical field
The present invention relates to nanoemulsions。It is more particularly related to a kind of oil of ginger nanoemulsions and preparation method thereof。
Background technology
Rhizoma Zingiberis Recens, belongs to Zingiberaceae Rhizoma Zingiberis Recens and belongs to, be a kind of conventional flavouring agent, is also a kind of traditional medicine。
Oil of ginger is the general name of a class Rhizoma Zingiberis Recens extract, is the concentration of flavor compounds in ginger material and functional materials, have compared with Rhizoma Zingiberis Recens economy, health, easy to use, be readily transported with store, the characteristic such as standardization。Oil of ginger can be divided into the Rhizoma Zingiberis Recens quintessence oil containing volatile ingredient and nonvolatile resinon。Rhizoma Zingiberis Recens quintessence oil is bright yellow, and volatile ingredient therein is mainly sesquiterpene carbohydrate and oxidation sesquiterpene, additionally contains monoterpene class carbohydrate and oxidation monoterpene class, is the significant contributor of Rhizoma Zingiberis Recens flavor substances。Wherein in sesquiterpene carbohydrate, it is mainly α-zingiberene。Rhizoma Zingiberis Recens resinon is deep amber thickness semifluid, and chemical substance therein is more stable, but the aldehydes matter in gingerol is easily heated, acid, the impact of alkali and unstable, occur dehydration or retrograde aldol condensation to react。Gingerol is the compounding substances that a class has pungent local flavor, is the significant contributor of pungent in Rhizoma Zingiberis Recens, and wherein 6-gingerol is topmost functional component。Oil of ginger has been widely used for the fields such as food, medicine, article of everyday use at present, has huge application development space and potentiality。
Nanoemulsions refers to the emulsion particle diameter emulsion in nanometer range, is also referred to as miniemulsion or submicron emulsion etc.。Nanoemulsions its particle diameter compared with simple emulsion is less, more stable homogeneous, transparency more preferably, absorbance higher, be the study hotspot of cosmetics, medicine and field of food。In recent years, food stage nanoemulsions is widely used in embedding and the transmission of food function composition and nutrient, is a kind of simple and effective embedding transportation system。The particle diameter of nanoemulsions is less, little by action of gravity, and diffusion rate, higher than the speed of precipitation or breast analysis, effectively inhibits precipitation and the breast analysis of emulsion。Additionally, the Brownian movement of the emulsion particle of little particle diameter is more notable, the stability of antisolvent precipitation and breast analysis is higher。But the report of the nanoemulsions that so far there are no prepares with oil of ginger for raw material excessively and product, therefore need the preparation method finding a kind of oil of ginger nanoemulsions that can retain volatile flavor substance in oil of ginger badly。
Summary of the invention
It is an object of the invention to solve at least the above, and the advantage that at least will be described later is provided。
It is a still further object of the present invention to provide a kind of oil of ginger nanoemulsions, the oil of ginger of mass ratio 80～100: 90～110: 1000, emulsifying agent and deionized water are as raw material, with starch sodium octenyl succinate for emulsifying agent, oil of ginger is Rhizoma Zingiberis Recens quintessence oil and ginger oil resin mass ratio is the mixture of 1: 1, this kind of oil of ginger nanoemulsions has good bacteriostasis, it is possible to be applied to field of food as potential food antibacterial or emulsifying essence。
The preparation method that it is a still further object of the present invention to provide a kind of oil of ginger nanoemulsions, this kind of preparation method prepares oil of ginger nanoemulsions with starch sodium octenyl succinate for emulsion stabilizer, oil of ginger infinite dilution is enable to be dissolved in aqueous phase, the energy simultaneously utilizing ultrasound wave to produce, improves absorption rate and the stability of oil of ginger。
In order to realize these purposes according to the present invention and further advantage, provide a kind of oil of ginger nanoemulsions, its raw material composition includes oil of ginger, emulsifying agent and deionized water, the mass ratio of described oil of ginger, described emulsifying agent and deionized water is 80～100: 90～110: 1000, wherein, described emulsifying agent is starch sodium octenyl succinate, and described oil of ginger is Rhizoma Zingiberis Recens quintessence oil and ginger oil resin mass ratio is the mixture of 1: 1。
The present invention can further be realized by the preparation method of a kind of oil of ginger nanoemulsions, including:
Step one: at extraction temperature 30～40 DEG C, supercritical CO2Extract Rhizoma Zingiberis powder 2～4h, separate after obtaining described ginger oil resin, described ginger oil resin is carried out molecular distillation, obtains distillation and be described Rhizoma Zingiberis Recens quintessence oil；
Step 2: after described Rhizoma Zingiberis Recens quintessence oil and described ginger oil resin are mixed to get described oil of ginger according to above-mentioned mass ratio, starch sodium octenyl succinate and deionized water is taken by above-mentioned mass ratio, after starch sodium octenyl succinate and deionized water are mixed to get emulsion, described oil of ginger is added in described emulsion according to above-mentioned mass ratio, thick emulsion is obtained after processing with high speed shear homogenizer, by emulsion thick described in ultrasonic Treatment, obtain oil of ginger nanoemulsions。
Preferably, supercritical CO in described step one2Extract Rhizoma Zingiberis powder and separation method particularly includes: at temperature 32～38 DEG C, pressure 35～45MPa, adopt supercritical CO2After extracting Rhizoma Zingiberis powder 2.5～3.5h, it is separate under 5～7MPa at pressure, collects the ginger oil resin that content is 150～161mg/g of α-zingiberene。
Preferably, described ginger oil resin is carried out molecular distillation by described step one method particularly includes: charging rate is 0.8～1.2ml/min, heating-up temperature is 40～50 DEG C, chilling temperature is 3～6 DEG C, carrying out molecular distillation when blade applicator rotating speed is 120～180r/min, the distillation obtained is described Rhizoma Zingiberis Recens quintessence oil。
Preferably, the preparation method of the Rhizoma Zingiberis powder in described step one is: thinly slice after being cleaned by Rhizoma Zingiberis Recens, 35～45 DEG C of hot air drying 20～28h, pulverizes, and after crossing 60 mesh sieves, obtains the described Rhizoma Zingiberis powder that water content is 5～8%。
Preferably, process starch sodium octenyl succinate mixed with deionized water in described step 2 is particularly as follows: join deionized water in the starch sodium octenyl succinate weighed, and addition limit, limit is sufficiently stirred for, and obtains emulsion, stands a night, to obtain final product。
Preferably, described thick emulsion is obtained after described step 2 processing 2min with high speed shear homogenizer with the rotating speed of 14000rpm。
Preferably, thick emulsion described in ultrasonic Treatment in described step 2 method particularly includes: in the ultrasonic cell disruption instrument that power is 430W, the horn end 2.5～3.5cm of the liquid level submergence ultrasonic cell disruption instrument of described thick emulsion, the working time and the intermittent time that arrange ultrasonic cell disruption instrument are 5s, obtain the described oil of ginger nanoemulsions that mean diameter is 141～149nm。
Preferably, after described step 2 obtains thick emulsion, after described thick emulsion is deposited 2～3h at 0 DEG C, return to room temperature, maintain 20～30min, after depositing 1～2h at-4 DEG C, return to room temperature, maintain 20～30min, then after depositing 0.6～1h at-8 DEG C, return to room temperature, then the described thick emulsion after freezing repeatedly is processed under the high pressure of 90～100MPa 10～20s, then carries out ultrasonic Treatment。
Preferably, pressure be under 5～7MPa separate method particularly includes: being separated by second depressurized, wherein flash trapping stage pressure is 6～7MPa, and flash trapping stage temperature is 40～55 DEG C, and the second-order separation pressure is 5～6MPa, and the second-order separation temperature is 20～35 DEG C。
The present invention at least includes following beneficial effect:
1, the oil of ginger nanoemulsions of the present invention is with oil of ginger, emulsifying agent and deionized water for raw material, and with starch sodium octenyl succinate for emulsifying agent, wherein, oil of ginger is Rhizoma Zingiberis Recens quintessence oil and ginger oil resin mass ratio is 1∶The mixture of 1。Key component α-zingiberene, β-bisabolene and β-sesquiphellandrene in Rhizoma Zingiberis Recens quintessence oil, it is the significant contributor of Rhizoma Zingiberis Recens flavor substances and antibiotic property, but these components are the terpenoid substance of instability, volatile, temperature, illumination is all very sensitive, storage process easily causes the change of flavor substance。Simultaneously, gingerol in ginger oil resin is as the significant contributor of pungent in Rhizoma Zingiberis Recens, aldehydes matter therein such as 6-gingerol is unstable, easily it is heated, acid, the impact of alkali and there is dehydration or retrograde aldol condensation reaction, it is that 1: 1 mixing ratio is used alone one of which flavor substance kind more comprehensively by Rhizoma Zingiberis Recens quintessence oil and ginger oil resin according to mass ratio, α-zingiberene therein can be made full use of, β-bisabolene, β-flavor substance such as sesquiphellandrene and 6-gingerol, antibacterial effect is better, carry out embedding with starch sodium octenyl succinate for emulsifying agent and can be sufficiently reserved volatile material therein, also the antibacterial ability in oil of ginger it has been effectively maintained, and have good stability, can store the long period, potential use value is had in food antibacterial。
2, the preparation method of the oil of ginger nanoemulsions of the present invention, oil of ginger nanoemulsions is prepared for emulsion stabilizer with starch octenyl succinate anhydride, oil of ginger infinite dilution is enable to be dissolved in aqueous phase, the antibacterial ability of oil of ginger will not be impacted by the embedding system that starch octenylsuccinate makes as emulsifying agent simultaneously, preparation process utilizes the thick emulsion of ultrasonic Treatment, make full use of the energy that ultrasound wave produces, big emulsion particle is crushed the nano level emulsion particle becoming little, improves absorption rate and the stability of oil of ginger。
3, the oil of ginger nanoemulsions that prepared by the present invention, at the suitable temperature being stored in 4 DEG C, the oil of ginger nanoemulsions of the present invention has stronger pH repellence, emulsion stability is good in acid condition, stabilizer or auxiliary agent as acidic beverages have potential using value in exploitation, simultaneously, the freeze-thaw stability of oil of ginger nanoemulsions is good, thousand times of diluents stand to be centrifuged there is not scraper ring and precipitation, the nanoemulsions stability of preparation meets national standard, it is possible to be applied to field of food as emulsifying essence。
4, thick emulsion is repeatedly freezing at different temperature, big emulsion particle can be helped to crush the nano level emulsion particle becoming little, reduce subsequent ultrasonic ripple and process required energy, the simultaneously different exercises under freezing environment makes the oil of ginger nanoemulsions freeze-thaw stability prepared better, improve its performance, process under the high pressure of 90～100MPa and can be crushed by environment under high pressure extruding emulsion particle, accelerate the formation of nanoparticle。
5, the separation method that second depressurized segregation ratio is common separates more thorough, less side products, and raw material availability is higher。
Part is embodied by the further advantage of the present invention, target and feature by description below, and part is also by by being understood by those skilled in the art the research of the present invention and practice。
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, to make those skilled in the art can implement according to this with reference to description word。
Embodiment 1
Step one: thinly slice after being cleaned by Rhizoma Zingiberis Recens, 35 DEG C of hot air drying 20h, pulverizes, and after crossing 60 mesh sieves, obtains the Rhizoma Zingiberis powder that water content is 8%。
At temperature 32 DEG C, pressure 35MPa, adopt supercritical CO2After extracting Rhizoma Zingiberis powder 2.5, it is separate under 5MPa at pressure, collects the ginger oil resin that content is 150mg/g of α-zingiberene。Charging rate is 0.8ml/min, and heating-up temperature is 40 DEG C, and chilling temperature is 3 DEG C, when blade applicator rotating speed is 120r/min, ginger oil resin is carried out molecular distillation, and the distillation obtained is described Rhizoma Zingiberis Recens quintessence oil。
Step 2: according to the mass fraction, after described Rhizoma Zingiberis Recens quintessence oil and described ginger oil resin are mixed to get according to mass ratio 1: 1 the described oil of ginger of 80 mass parts, take in the starch sodium octenyl succinate that the deionized water of 1000 mass parts joins 90 mass parts, addition limit, limit is sufficiently stirred for, stand a night, obtain emulsion, described oil of ginger is added in described emulsion, thick emulsion is obtained after processing 2min with high speed shear homogenizer with the rotating speed of 14000rpm, in the ultrasonic cell disruption instrument that power is 430W, end 2.5cm by the horn of the liquid level submergence ultrasonic cell disruption instrument of described thick emulsion, the working time and the intermittent time that arrange ultrasonic cell disruption instrument are 5s, the described oil of ginger nanoemulsions that mean diameter is 141nm is obtained after process。
Embodiment 2
Step one: thinly slice after being cleaned by Rhizoma Zingiberis Recens, 45 DEG C of hot air drying 28h, pulverizes, and after crossing 60 mesh sieves, obtains the Rhizoma Zingiberis powder that water content is 5%。
At temperature 38 DEG C, pressure 45MPa, adopt supercritical CO2After extracting Rhizoma Zingiberis powder 3.5h, it is separate under 7MPa at pressure, collects the ginger oil resin that content is 161mg/g of α-zingiberene。Charging rate is 1.2ml/min, and heating-up temperature is 50 DEG C, and chilling temperature is 6 DEG C, when blade applicator rotating speed is 180r/min, ginger oil resin is carried out molecular distillation, and the distillation obtained is described Rhizoma Zingiberis Recens quintessence oil。
Step 2: according to the mass fraction, after described Rhizoma Zingiberis Recens quintessence oil and described ginger oil resin are mixed to get according to mass ratio 1: 1 the described oil of ginger of 100 mass parts, take in the starch sodium octenyl succinate that the deionized water of 1000 mass parts joins 110 mass parts, addition limit, limit is sufficiently stirred for, stand a night, obtain emulsion, described oil of ginger is added in described emulsion, thick emulsion is obtained after processing 2min with high speed shear homogenizer with the rotating speed of 14000rpm, in the ultrasonic cell disruption instrument that power is 430W, end 3.5cm by the horn of the liquid level submergence ultrasonic cell disruption instrument of described thick emulsion, the working time and the intermittent time that arrange ultrasonic cell disruption instrument are 5s, the described oil of ginger nanoemulsions that mean diameter is 149nm is obtained after process。
Embodiment 3
Step one: thinly slice after being cleaned by Rhizoma Zingiberis Recens, 40 DEG C of hot air drying 25h, pulverizes, and after crossing 60 mesh sieves, obtains the Rhizoma Zingiberis powder that water content is 6%。
At temperature 35 DEG C, pressure 40MPa, adopt supercritical CO2After extracting Rhizoma Zingiberis powder 3h, it is separate under 6MPa at pressure, collects the ginger oil resin that content is 155mg/g of α-zingiberene。Charging rate is 1.0ml/min, and heating-up temperature is 45 DEG C, and chilling temperature is 5 DEG C, when blade applicator rotating speed is 150r/min, ginger oil resin is carried out molecular distillation, and the distillation obtained is described Rhizoma Zingiberis Recens quintessence oil。
Step 2: according to the mass fraction, after described Rhizoma Zingiberis Recens quintessence oil and described ginger oil resin are mixed to get according to mass ratio 1: 1 the described oil of ginger of 90 mass parts, take in the starch sodium octenyl succinate that the deionized water of 1000 mass parts joins 100 mass parts, addition limit, limit is sufficiently stirred for, stand a night, obtain emulsion, described oil of ginger is added in described emulsion, thick emulsion is obtained after processing 2min with high speed shear homogenizer with the rotating speed of 14000rpm, in the ultrasonic cell disruption instrument that power is 430W, end 3.0cm by the horn of the liquid level submergence ultrasonic cell disruption instrument of described thick emulsion, the working time and the intermittent time that arrange ultrasonic cell disruption instrument are 5s, the described oil of ginger nanoemulsions that mean diameter is 145nm is obtained after process。
Embodiment 4
Step one: thinly slice after being cleaned by Rhizoma Zingiberis Recens, 35 DEG C of hot air drying 20h, pulverizes, and after crossing 60 mesh sieves, obtains the Rhizoma Zingiberis powder that water content is 8%。
At temperature 32 DEG C, pressure 35MPa, adopt supercritical CO2After extracting Rhizoma Zingiberis powder 2.5h, being separated by second depressurized, wherein flash trapping stage pressure is 6MPa, and flash trapping stage temperature is 40 DEG C, and the second-order separation pressure is 5MPa, and the second-order separation temperature is 20 DEG C, collects the ginger oil resin that content is 150mg/g of α-zingiberene。Charging rate is 0.8ml/min, and heating-up temperature is 40 DEG C, and chilling temperature is 3 DEG C, when blade applicator rotating speed is 120r/min, ginger oil resin is carried out molecular distillation, and the distillation obtained is described Rhizoma Zingiberis Recens quintessence oil。
Step 2: according to the mass fraction, after described Rhizoma Zingiberis Recens quintessence oil and described ginger oil resin are mixed to get according to mass ratio 1: 1 the described oil of ginger of 80 mass parts, take in the starch sodium octenyl succinate that the deionized water of 1000 mass parts joins 90 mass parts, addition limit, limit is sufficiently stirred for, stand a night, obtain emulsion, described oil of ginger is added in described emulsion, after processing 2min with high speed shear homogenizer with the rotating speed of 14000rpm, obtain thick emulsion。
After described thick emulsion is deposited 2h at 0 DEG C, return to room temperature, maintain 20min, after depositing 1h at-4 DEG C, return to room temperature, maintain 20min, then after depositing 0.6h at-8 DEG C, return to room temperature, then the described thick emulsion after freezing repeatedly is processed under the high pressure of 90MPa 10s。
In the ultrasonic cell disruption instrument that power is 430W, end 2.5cm by the horn of the liquid level submergence ultrasonic cell disruption instrument of described thick emulsion, the working time and the intermittent time that arrange ultrasonic cell disruption instrument are 5s, obtain the described oil of ginger nanoemulsions that mean diameter is 141nm after process。
Embodiment 5
Step one: thinly slice after being cleaned by Rhizoma Zingiberis Recens, 45 DEG C of hot air drying 28h, pulverizes, and after crossing 60 mesh sieves, obtains the Rhizoma Zingiberis powder that water content is 5%。
At temperature 38 DEG C, pressure 45MPa, adopt supercritical CO2After extracting Rhizoma Zingiberis powder 3.5h, being separated by second depressurized, wherein flash trapping stage pressure is 7MPa, and flash trapping stage temperature is 55 DEG C, and the second-order separation pressure is 6MPa, and the second-order separation temperature is 35 DEG C, collects the ginger oil resin that content is 161mg/g of α-zingiberene。Charging rate is 1.2ml/min, and heating-up temperature is 50 DEG C, and chilling temperature is 6 DEG C, when blade applicator rotating speed is 180r/min, ginger oil resin is carried out molecular distillation, and the distillation obtained is described Rhizoma Zingiberis Recens quintessence oil。
Step 2: according to the mass fraction, after described Rhizoma Zingiberis Recens quintessence oil and described ginger oil resin are mixed to get according to mass ratio 1: 1 the described oil of ginger of 100 mass parts, take in the starch sodium octenyl succinate that the deionized water of 1000 mass parts joins 110 mass parts, addition limit, limit is sufficiently stirred for, stand a night, obtain emulsion, described oil of ginger is added in described emulsion, after processing 2min with high speed shear homogenizer with the rotating speed of 14000rpm, obtain thick emulsion。
After described thick emulsion is deposited 3h at 0 DEG C, return to room temperature, maintain 30min, after depositing 2h at-4 DEG C, return to room temperature, maintain 30min, then after depositing 1h at-8 DEG C, return to room temperature, then the described thick emulsion after freezing repeatedly is processed under the high pressure of 100MPa 20s。
In the ultrasonic cell disruption instrument that power is 430W, end 3.5cm by the horn of the liquid level submergence ultrasonic cell disruption instrument of described thick emulsion, the working time and the intermittent time that arrange ultrasonic cell disruption instrument are 5s, obtain the described oil of ginger nanoemulsions that mean diameter is 149nm after process。
Embodiment 6
Step one: thinly slice after being cleaned by Rhizoma Zingiberis Recens, 40 DEG C of hot air drying 25h, pulverizes, and after crossing 60 mesh sieves, obtains the Rhizoma Zingiberis powder that water content is 6%。
At temperature 35 DEG C, pressure 40MPa, adopt supercritical CO2After extracting Rhizoma Zingiberis powder 3h, being separated by second depressurized, wherein flash trapping stage pressure is 6MPa, and flash trapping stage temperature is 50 DEG C, and the second-order separation pressure is 5MPa, and the second-order separation temperature is 30 DEG C, collects the ginger oil resin that content is 155mg/g of α-zingiberene。Charging rate is 1.0ml/min, and heating-up temperature is 45 DEG C, and chilling temperature is 5 DEG C, when blade applicator rotating speed is 150r/min, ginger oil resin is carried out molecular distillation, and the distillation obtained is described Rhizoma Zingiberis Recens quintessence oil。
Step 2: according to the mass fraction, after described Rhizoma Zingiberis Recens quintessence oil and described ginger oil resin are mixed to get according to mass ratio 1: 1 the described oil of ginger of 90 mass parts, take in the starch sodium octenyl succinate that the deionized water of 1000 mass parts joins 100 mass parts, addition limit, limit is sufficiently stirred for, stand a night, obtain emulsion, described oil of ginger is added in described emulsion, after processing 2min with high speed shear homogenizer with the rotating speed of 14000rpm, obtain thick emulsion。
After described thick emulsion is deposited 3h at 0 DEG C, return to room temperature, maintain 25min, after depositing 2h at-4 DEG C, return to room temperature, maintain 25min, then after depositing 0.8h at-8 DEG C, return to room temperature, then the described thick emulsion after freezing repeatedly is processed under the high pressure of 95MPa 15s。
In the ultrasonic cell disruption instrument that power is 430W, end 3.0cm by the horn of the liquid level submergence ultrasonic cell disruption instrument of described thick emulsion, the working time and the intermittent time that arrange ultrasonic cell disruption instrument are 5s, obtain the described oil of ginger nanoemulsions that mean diameter is 145nm after process。
1) preparation method impact on oil of ginger nanoemulsions
Embodiments of the invention 3 have all been measured by inventor with the active constituent content in the oil of ginger nanoemulsions of embodiment 6 preparation, and respectively as a group and b group, experimental result is as follows:
The impact on oil of ginger nanoemulsions of table 1 preparation method
As can be seen from Table 1, b group is compared with a group, b group have employed repeatedly freezing and HIGH PRESSURE TREATMENT, nanoparticle is broken more complete, mean diameter reduces to some extent, adopting second depressurized to separate makes the retention rate of gingerol in ginger oil resin increase to some extent, but α-zingiberene in Rhizoma Zingiberis Recens quintessence oil, the content of β-bisabolene and β-sesquiphellandrene declines to some extent than a group, consider in b group the oil of ginger nanoemulsions being to be prepared by embodiment 6, than preparation method complex procedures in embodiment 3 and more inconspicuous than the superiority of a group, consider, the preparation method of preferred embodiment 3 prepares oil of ginger nanoemulsions。
2) reserve temperature impact on oil of ginger nanoemulsions
The impact of inventor's oil of ginger nanoemulsions on preserving under different temperatures embodiments of the invention 3 preparation has been tested, to filter out suitable reserve temperature, with the oil of ginger nanoemulsions before storage as a control group, measuring under 4 DEG C, 25 DEG C, 55 DEG C temperature conditions the impact on oil of ginger nanoemulsions after storage surrounding respectively, experimental result is as follows:
The impact on oil of ginger nanoemulsions is preserved under table 2 different temperatures
As can be seen from Table 2, after preserving surrounding under 4 DEG C, 25 DEG C, 55 DEG C temperature conditions, mean diameter is all held essentially constant, and zeta current potential is also at relatively stable numerical range, illustrates that the storage physics of nanoemulsions has good stability。The retention rate of oil of ginger nanoemulsions gingerol is all more than 80%, and at 4 DEG C, after storage surrounding, the retention rate of gingerol is the highest, therefore storage the best at 4 DEG C。After preserving surrounding under 4 DEG C, 25 DEG C, 55 DEG C temperature conditions, the changes of contents of α-curcumene is all inconspicuous, and the content of β-bisabolene and β-sesquiphellandrene changes inconspicuous when preserving at 4 DEG C, when preserving under 25 DEG C or 55 DEG C of conditions, content significantly reduces, namely effective ingredient reduces, and again shows that oil of ginger nanoemulsions prepared by the present invention is suitable at 4 DEG C and preserves。
3) the antibiotic property experiment of oil of ginger nanoemulsions
As a group in the oil of ginger nanoemulsions of embodiments of the invention 3 preparation；Replacing Rhizoma Zingiberis Recens quintessence oil and mixture that ginger oil resin mass ratio is 1: 1 raw material as oil of ginger nanoemulsions only with ginger oil resin in f group, all the other are all identical with the preparation method of the oil of ginger nanoemulsions in embodiment 3, and obtaining product is f group；Replacing Rhizoma Zingiberis Recens quintessence oil and mixture that ginger oil resin mass ratio is 1: 1 raw material as oil of ginger nanoemulsions only with Rhizoma Zingiberis Recens quintessence oil in g group, all the other are all identical with the preparation method of the oil of ginger nanoemulsions in embodiment 3, and obtaining product is g group；H group adopt the commercially available oil of ginger that light water steam distillation method prepares replace Rhizoma Zingiberis Recens quintessence oil and mixture that ginger oil resin mass ratio is 1: 1 raw material as oil of ginger nanoemulsions, all the other are all identical with the preparation method of the oil of ginger nanoemulsions in embodiment 3, and obtaining product is h group；Not adopting ultrasonic Treatment to obtain oil of ginger nanoemulsions in i group, with the thick emulsion that obtains for i group, all the other are all identical with the preparation method of the oil of ginger nanoemulsions in embodiment 3；A group, f～i group and common food antibacterial potassium sorbate are carried out bacteriostatic experiment respectively on the flat board be coated with bacterium solution, record result as follows:
The impact on different strain of the table 3 oil of ginger nanoemulsions
As can be seen from Table 3, a group is compared with h group, hence it is evident that have better effect, it was shown that the present invention adopts Rhizoma Zingiberis Recens quintessence oil and mixture that ginger oil resin mass ratio is 1: 1 to make oil of ginger nanoemulsions fungistatic effect better as the raw material of oil of ginger nanoemulsions。A group is compared with i group, hence it is evident that have better effect, it was shown that the energy that oil of ginger nanoemulsions prepared by the present invention produces owing to utilizing ultrasound wave inhibits precipitation and the breast analysis of emulsion after making nanoemulsions, make fungistatic effect play better。
A group is compared with f group, escherichia coli and staphylococcus aureus are had better fungistatic effect by a group, a group is compared with g group, Bacillus proteus and penicillium sp are had better fungistatic effect by a group, this is owing to a group is the oil of ginger nanoemulsions prepared by embodiment 3, a group adopts Rhizoma Zingiberis Recens quintessence oil and mixture that ginger oil resin mass ratio is 1: 1 as the raw material of oil of ginger nanoemulsions, and adopt supercritical CO2Extract and molecular distillation, the flavor substances such as the 6-gingerol in the α-zingiberene in Rhizoma Zingiberis Recens quintessence oil, β-bisabolene, β-sesquiphellandrene and ginger oil resin extracted completely and is sufficiently reserved, variety classes strain being had more common biocidal property and fungistatic effect is better。A group respectively has superiority compared with food antibacterial potassium sorbate, it can thus be appreciated that the oil of ginger nanoemulsions of the present invention has potential use value in food antibacterial。
4) oil of ginger nanoemulsions effect in Yoghourt
The Yoghourt made using commercially available gelatin as stabilizer as a control group, uses the oil of ginger nanoemulsions of different content to mix the stabilizer of composition with gelatin as 1～4 group respectively in Yoghourt fermentation process, records result as follows:
The impact on Yoghourt of the table 4 oil of ginger nanoemulsions
As can be seen from Table 4, Yoghourt viscosity in 2 groups is minimum with acidity excursion, and it is better than currently used gelatine stabiliser, show that the oil of ginger nanoemulsions of the present invention has stronger pH repellence, auxiliary agent as stabilizer has potential using value in exploitation, oil of ginger nanoemulsions and gelatin with the use of time, mass fraction is 40% best results。
Although embodiment of the present invention are disclosed as above, but listed utilization that it is not restricted in description and embodiment, it can be applied to various applicable the field of the invention completely, for those skilled in the art, it is easily achieved other amendment, therefore, under the general concept limited without departing substantially from claim and equivalency range, the present invention is not limited to specific details and shown here as the embodiment with description。
Claims (10)
1. an oil of ginger nanoemulsions, it is characterized in that, its raw material composition includes oil of ginger, emulsifying agent and deionized water, the mass ratio of described oil of ginger, described emulsifying agent and deionized water is 80～100: 90～110: 1000, wherein, described emulsifying agent is starch sodium octenyl succinate, and described oil of ginger is Rhizoma Zingiberis Recens quintessence oil and ginger oil resin mass ratio is the mixture of 1: 1。
2. the preparation method of an oil of ginger nanoemulsions as claimed in claim 1, it is characterised in that including:
Step one: at extraction temperature 30～40 DEG C, supercritical CO2Extract Rhizoma Zingiberis powder 2～4h, separate after obtaining described ginger oil resin, described ginger oil resin is carried out molecular distillation, obtains distillation and be described Rhizoma Zingiberis Recens quintessence oil；
Step 2: after described Rhizoma Zingiberis Recens quintessence oil and described ginger oil resin are mixed to get described oil of ginger according to above-mentioned mass ratio, starch sodium octenyl succinate and deionized water is taken by above-mentioned mass ratio, after starch sodium octenyl succinate and deionized water are mixed to get emulsion, described oil of ginger is added in described emulsion according to above-mentioned mass ratio, thick emulsion is obtained after processing with high speed shear homogenizer, by emulsion thick described in ultrasonic Treatment, obtain oil of ginger nanoemulsions。
3. the preparation method of oil of ginger nanoemulsions as claimed in claim 2, it is characterised in that supercritical CO in described step one2Extract Rhizoma Zingiberis powder and separation method particularly includes: at temperature 32～38 DEG C, pressure 35～45MPa, adopt supercritical CO2After extracting Rhizoma Zingiberis powder 2.5～3.5h, it is separate under 5～7MPa at pressure, collects the ginger oil resin that content is 150～161mg/g of α-zingiberene。
4. the preparation method of oil of ginger nanoemulsions as claimed in claim 2, it is characterized in that, described ginger oil resin is carried out molecular distillation by described step one method particularly includes: charging rate is 0.8～1.2ml/min, heating-up temperature is 40～50 DEG C, chilling temperature is 3～6 DEG C, carrying out molecular distillation when blade applicator rotating speed is 120～180r/min, the distillation obtained is described Rhizoma Zingiberis Recens quintessence oil。
5. the preparation method of oil of ginger nanoemulsions as claimed in claim 2, it is characterised in that the preparation method of the Rhizoma Zingiberis powder in described step one is: thinly slice after being cleaned by Rhizoma Zingiberis Recens, 35～45 DEG C of hot air drying 20～28h, pulverize, after crossing 60 mesh sieves, obtain the described Rhizoma Zingiberis powder that water content is 5～8%。
6. the preparation method of oil of ginger nanoemulsions as claimed in claim 2, it is characterized in that, process starch sodium octenyl succinate mixed with deionized water in described step 2 is particularly as follows: join deionized water in the starch sodium octenyl succinate weighed, addition limit, limit is sufficiently stirred for, obtain emulsion, stand a night, to obtain final product。
7. the preparation method of oil of ginger nanoemulsions as claimed in claim 2, it is characterised in that obtain described thick emulsion after processing 2min with high speed shear homogenizer with the rotating speed of 14000rpm in described step 2。
8. the preparation method of oil of ginger nanoemulsions as claimed in claim 2, it is characterized in that, thick emulsion described in ultrasonic Treatment in described step 2 method particularly includes: in the ultrasonic cell disruption instrument that power is 430W, the horn end 2.5～3.5cm of the liquid level submergence ultrasonic cell disruption instrument of described thick emulsion, the working time and the intermittent time that arrange ultrasonic cell disruption instrument are 5s, obtain the described oil of ginger nanoemulsions that mean diameter is 141～149nm。
9. the preparation method of oil of ginger nanoemulsions as claimed in claim 2, it is characterised in that after obtaining thick emulsion in described step 2, after described thick emulsion is deposited 2～3h at 0 DEG C, return to room temperature, maintain 20～30min, after depositing 1～2h at-4 DEG C, return to room temperature, maintain 20～30min, after then depositing 0.6～1h at-8 DEG C, return to room temperature, then the described thick emulsion after freezing repeatedly is processed under the high pressure of 90～100MPa 10～20s, then carries out ultrasonic Treatment。
10. the preparation method of oil of ginger nanoemulsions as claimed in claim 3, it is characterized in that, it is separate under 5～7MPa at pressure method particularly includes: separated by second depressurized, wherein flash trapping stage pressure is 6～7MPa, flash trapping stage temperature is 40～55 DEG C, the second-order separation pressure is 5～6MPa, and the second-order separation temperature is 20～35 DEG C。
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