CN107950684A - A kind of oleogel rich in unrighted acid and preparation method and application - Google Patents
A kind of oleogel rich in unrighted acid and preparation method and application Download PDFInfo
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- CN107950684A CN107950684A CN201711401181.9A CN201711401181A CN107950684A CN 107950684 A CN107950684 A CN 107950684A CN 201711401181 A CN201711401181 A CN 201711401181A CN 107950684 A CN107950684 A CN 107950684A
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- oleogel
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- unrighted acid
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23D—EDIBLE OILS OR FATS, e.g. MARGARINES, SHORTENINGS, COOKING OILS
- A23D9/00—Other edible oils or fats, e.g. shortenings, cooking oils
- A23D9/007—Other edible oils or fats, e.g. shortenings, cooking oils characterised by ingredients other than fatty acid triglycerides
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23D—EDIBLE OILS OR FATS, e.g. MARGARINES, SHORTENINGS, COOKING OILS
- A23D9/00—Other edible oils or fats, e.g. shortenings, cooking oils
- A23D9/02—Other edible oils or fats, e.g. shortenings, cooking oils characterised by the production or working-up
- A23D9/04—Working-up
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- Edible Oils And Fats (AREA)
- Coloring Foods And Improving Nutritive Qualities (AREA)
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Abstract
The invention discloses a kind of oleogel rich in unrighted acid and preparation method and application.The oleogel rich in unrighted acid includes following components：50~60 parts by volume of vegetable oil, 0.6~0.72 mass parts of gelatin, 0.3~0.36 mass parts of polysaccharide, 0.0375~0.09 mass parts of polyphenol rich in unrighted acid.The present invention first prepares gelatin polyphenol composite solution, add vegetable oil afterwards and polysaccharide prepares complex emulsions, processing is dried to remove moisture removal in the complex emulsions of preparation, dry complex emulsions finally are carried out simple shear obtains solid oleogel of the oil content more than 96%.Utilize the preparation method of the present invention, it can obtain the food solid grease rich in unrighted acid and without trans-fatty acid, grease has good oxidation stability at the same time, can replace saturated fat and trans fats in Partial Food, become new type health functional food ingredient.
Description
Technical field
The invention belongs to field of food, and in particular to a kind of oleogel rich in unrighted acid and preparation method thereof with
Using.
Background technology
Food special fat used in margarine, wafer in domestic market etc. is mostly saturated fat or part
Atherosclerosis and angiocarpy are suffered from the easily increase of the saturated fat and trans fats of the triacylglycerol of hydrogenation, wherein high level
The risk of disease.Therefore, seek the novel processing step of the solid-state structure fat of similar plastic fat, with reduce saturated fat and
The intake of trans fats is of great significance.Vegetable oil forms the oleogel of similar gels shape by certain way, makes under room temperature
Solid-state is presented for the liquid fat rich in unrighted acid, saturation and trans fats in food can be replaced, enhancing grease makes
With and operating characteristics, convenience in transport simultaneously improve shelf life, increase human body intake content of polyunsaturated fatty acid, it is also possible to make medicine
The carrier of thing and function factor protects bioactive substance and improves bioavilability.
The Low-molecular weight organogel factor (hydroxy fatty acid, phytosterol, god are used more to the preparation research of oleogel at present
Through acid amides, alkane and vegetable wax, monoacylglycerol ester) formed by being self-assembled into crystal network structure, gelator additive amount
Contain more saturated fatty acid in higher and lubricant component.Also, these gelators in food processing there are many problems,
Three-dimensional net structure such as hydroxy fatty acid formation can be destroyed in stirring, cause the loss of liquid oil；Phytosterol coagulates
Colloidality can be influenced serious etc. by moisture.
Chinese invention patent application (publication number CN104855548A) discloses a kind of system of load carrotene grease gel
Preparation Method.The food-grade ceramide of addition 8%~12% in party's normal direction corn oil, 85 DEG C of heating, prepares load carrotene
Oleogel, this method carrotene load rate is high, but gelling agent ceramide needs addition higher, is corn oil quality
8~12%, cost is higher, while needs higher temperature to heat.
Chinese invention patent application (publication number CN105994698A) discloses a kind of using pickering emulsion as template preparation
The method of edible fats gel, this method first prepare soybean protein isolate nano particle, and it is strong for gel to add xanthans afterwards
Agent forms emulsion oil-in-water, and the moisture in lotion is then removed with drying means, obtains edible fats gel, this method
Need to pass through centrifugation, heating and etc. prepare soybean protein isolate nano-particle, manufacture craft is cumbersome, forced air drying method prepare oil
Gel contains compared with polyunsaturated fat and protein, but does not contain antioxidant content, is easily aoxidized during storage, and does
Oleogel after dry is difficult to prepare lotion again, influences its application effect.
Chinese invention patent application (publication number CN201611103432.0) discloses a kind of modified soy-bean protein polyphenol and answers
The preparation method of lotion is closed, this method first passes through heating and the method for ultrasound prepares modified dissolvable soybean protein, afterwards and more
Phenol solution prepares mixed emulsion.This method needs heating stepses and ultrasound solubilising, and process is cumbersome, and application is limited.
Chinese invention patent application (publication number CN105228461A) discloses a kind of from ethyl cellulose and oiliness charging
The continuous method for preparing oleogel.Ethyl cellulose is fed into the feed zone of extruder by this method, the extruder along its
Length has multiple oil inlet ports, and the charging of at least one oiliness is formed mixture, mixture with the ethyl cellulose homogeneous
It is cooled into oleogel.Although this method can prepare the edible solid grease without trans-fatty acid, need to extrude
Machine equipment, and the melting zone temperature of extruder need to be controlled at 100~200 DEG C, high-temperature technology can accelerate the oxidation of grease.
Chinese invention patent application (publication number CN106070736A) discloses a kind of vegetable seed gel with weight reducing
The preparation method of oil.This method first using monoglyceride stearic acid in 70 DEG C of heating and meltings as oil phase, using yeast dextran, ferment
Female B family vitamin, N- trimethyl chitins and water mixed high-voltage homogeneous prepare aqueous solution, then freeze-dried processing 20min
Afterwards, and erucic acid sucrose ester is added to oil phase, high speed shear 3min, then freeze-dried 24h together, obtains functionalised dispersant.
Rapeseed oil and functionalised dispersant, folium cortex eucommiae n-butyl alcohol extract, maltitol are mixed afterwards, the heating stirring in steam bath
50~60min, adds gamma oryzanol, cupreol, with infrared heating, with the heating rate of 4 DEG C/min from 100~140 DEG C
Heating stirring processing, then with the rate of temperature fall of 2 DEG C/min from 140~100 DEG C of stirring coolings, finally with the cooling speed of 15 DEG C/min
After rate is cooled to room temperature, the cold 55~60h that puts obtains gel oil.This method operating process is cumbersome, and complicated component, ingredient requirement compared with
It is high.
Research for preparing grease gel using macromolecular, Ashok R.Patel etc. are in paper (Biopolymer-
based structuring of liquid oil into soft solids and oleogels using water-
Continuous emulsions as templates, Langmuir, 2015,31,2065-2073) and (Edible
oleogels based on water soluble food polymers：preparation,characterization
And potential application, Food ＆ Function, 2014,5,2833-2841) in report Methyl cellulose
Element, the grease gel preparation method of gelatin and xanthans as gelling agent.Flaxseed gum is a kind of natural plants seed glue, is one
Kind macromolecule polyalcohol polysaccharide, currently as a kind of new food additive, it is applied and product development is not much and sees.
The content of the invention
In place of solving above-mentioned the deficiencies in the prior art, primary and foremost purpose of the present invention is that providing one kind is rich in unsaturated fat
The oleogel of acid.Oleogel provided by the present invention is rich in polyunsaturated fatty acid, without trans fats, and efficiently remains day
Crosslinking and antioxidant are played the role of in the activity of right macromolecular, the addition of plant polyphenol, enhance the parcel effect of oil droplet interface
Fruit, improves the oxidation stability of unrighted acid in grease, adds the stability of oil droplet during lotion dehydration and drying,
Gained oleogel has the character of solid fat, also can obtain stable lotion by homogeneous again, is that a kind of saturated fat and hydrogenation are planted
The ideal substitute of thing oil.
Another object of the present invention is to provide the preparation method of the above-mentioned oleogel rich in unrighted acid.This method
Glue compound is prepared with natural biological macromolecular gelatin and antioxygenic micromolecule plant polyphenol under certain condition first, afterwards
Lotion is prepared with vegetable oil mixing homogeneous, polysaccharide is eventually adding and forms complex emulsions, micro- sem observation shows albumen-polyphenol-more
Sugar can be adsorbed in oil droplets in granular form, and lotion goes after moisture removal that the oil of different shape can be made by different drying modes
Gel.
It is still another object of the present invention to provide the above-mentioned oleogel rich in unrighted acid as healthy functions food
The application of dispensing.
The purpose of the present invention is achieved through the following technical solutions：
A kind of oleogel rich in unrighted acid, including following components：
The gelatin is 16 with polyphenol mass ratio：1~8：1；
The ratio of the parts by volume and mass parts is 1 mass parts：1 parts by volume=1g/mL.
Preferably, the gelatin is type B gelatin；Polyphenol for tannic acid, grape pip procyanidin, one kind in catechin or
It is a variety of.Plant small molecular polyphenol is used as crosslinking agent and antioxidant, lotion unstability in lotion drying process is resisted, to improve lotion
With the stability of oleogel system.
Preferably, the vegetable oil rich in unrighted acid for soybean oil, linseed oil, sunflower oil, rapeseed oil,
One or more in corn oil.
Preferably, the polysaccharide is one or both of flaxseed gum, xanthans.
The preparation method of the above-mentioned oleogel rich in unrighted acid, comprises the following steps：
(1) gelatin-polyphenol complex is prepared：Choose gelatin and polyphenol and dissolve obtained aqueous solution respectively, by more phenol solutions with
Gelatin solution is uniformly mixed, and is adjusted pH value of solution to 6~7, is stirred to stable system, obtain gelatin-polyphenol complex, the gelatin
It is 16 with polyphenol mass ratio：1~8：1；
(2) complex emulsions are prepared：Gelatin-polyphenol complex is added in the vegetable oil rich in unrighted acid, is made molten
Polysaccharide solution is added after liquid emulsifying, then solution emulsifying is obtained complex emulsions；Complex emulsions system oil content is 50
~60% (v/v), polysaccharide concentration are 0.3~0.36% (w/v), and gelatin concentration is 0.6~0.72% (w/v), and polyphenol concentration is
0.0375~0.09% (w/v)；
(3) oleogel is prepared：By complex emulsions drying obtained by step (2), homogeneous obtains described being rich in unrighted acid
Oleogel.
Above-mentioned emulsion system oil content compares general lotion higher, but not above 60%, otherwise can not pass through drying
Mode forms solid fat.Polysaccharide need to shift to an earlier date 1~2h and be dissolved, and it is fully dissolved to mucus shape.
Preferably, step (1) described mixing time is 1~2h.
Preferably, step (2) handles 1~2min before polysaccharide solution is added by high speed shear makes solution emulsifying,
Add after polysaccharide solution makes solution emulsifying by 2~3min of high speed shear processing again；The high speed shear speed is 10000
~15000r/min.
Preferably, step (3) described drying mode is one in vacuum freeze drying, electric heating forced air drying, vacuum drying
Kind is a variety of.
Drying mode has a major impact product property.Under the conditions of freeze-drying, polysaccharide is xanthans or flaxseed gum
The oleogel of stabilization can be formed, but under the conditions of forced air drying, polysaccharide could form stable oil when being only flaxseed gum
Gel, and the oleogel shape characteristic that both drying modes obtain is different, there were significant differences for hardness, rheological behavior, can be with
Different purposes in food are provided.
Preferably, step (3) carries out homogeneous by shearing 1~2min, and shear rate is 9000~10000r/min.
Vegetable oil mass fraction is 96%~98% in oleogel obtained above, gelatin mass fraction for 1.2~
1.6%, mass fraction of polysaccharide is 0.6~0.8%, and polyphenol mass fraction is 0.075~0.2%.
The above-mentioned oleogel rich in unrighted acid can be used as healthy functions food ingredient, such as be applied to instead of shortening
Such as bread, cake or meat products such as frankfurter are blended in bakery, during meat pie makes, and food component can be with the present invention
Oleogel mixing manufacture product, oleogel can be gelatinization state or molten condition.Contain 5%~15% in bakery
Oleogel, containing 90~96% oleogel in smearing fat, contains 5%~30% oleogel in meat products.Use
Shortening or saturated fat in the oleogel substitute products of above dosage will not have an impact for quality.
Compared with prior art, the present invention having the following advantages that and beneficial effect：
(1) present invention prepares oleogel using natural, safe food macromolecular and small-molecule starting material, alternative high full
With fat and the shortening containing trans-fatty acid, margarine etc. are applied in food, have the characteristics such as natural, nutrition, for
Reduce the intake of saturated fat and trans fats in people's meals and the incidence of reduction atherosclerosis, angiocardiopathy etc.
Etc. having great importance.
(2) natural polyphenol class the material such as tannic acid, grape pip procyanidin and catechin etc. that the present invention uses have oxygen
Change reduction characteristic, can chelated metal ions and remove free radical, there is higher antioxidation activity.Oleogel storage can be reduced
During Oxidation of Fat and Oils, improve the storage stability of oleogel.
(3) the method comprises the steps of firstly, preparing gelatin and polyphenol composite solution, the Interfacial Adsorption characteristic using protein uniqueness will be more
Phenol is brought to oil droplets, solve polyphenol because it is fat-soluble it is low be dfficult to apply to problem in high fatty foods system, polyphenol is handed over
Connection promotes the formation of the firm boundary layer of oil droplets, avoids flocculation and aggregation of the lotion in drying process oil droplet.
(4) polysaccharide that the present invention adds, not only acts as the effect of emulsification, thickening or gelling, and polysaccharide and albumen, polyphenol
Suction-operated of the complex particle in oil droplets can be promoted by the combination such as electrostatic and non-electrostatic interaction, polysaccharide is solidifying in oil
Network structure is formed in glue and improves oil droplet embedding effect, strengthens oleogel structural stability.
(5) oleogel preparation method of the present invention need not add substantial amounts of small molecule gelator, and be not required to
Hot conditions are wanted, using the crosslinking ability and oxidation resistance of natural plant polyphenols, lotion drying is improved and prepares oleogel process
In Oil stability, also improve oleogel recasting emulsion intercalation method, solve existing for existing oleogel preparation process
Deficiency.
(6) the present invention relates to a kind of preparation rich in unrighted acid oleogel, operating process is simple, mild condition,
Of low cost without large scale equipment, material is natural, derives from a wealth of sources, and obtained oleogel has typical gel feature, oxidation-stabilized
Property it is preferable, and safe preparation process environmental protection, it is easy to accomplish produce in enormous quantities.
(7) oleogel prepared by the present invention is free of trans fats, is to pass through natural molecular structures rich in unrighted acid
Change the solid grease prepared, alternative shortening containing trans fats or margarine etc., act not only as a kind of nutrition,
The food ingredient of health, also can be as medicine and the carrier of function factor, and formation reverse micelle is played to activity in digestion process
The solubilising and controlled-release function of material, have preferable application prospect.
Brief description of the drawings
Fig. 1 is the preparation flow figure of the present invention.
Fig. 2 is that embodiment 1 adds shadow of the tannic acid to the thiobarbituricacidα- growing amount in soybean oil lotion storing process
Ring.
Fig. 3 is the outside drawing of the freeze-drying gained of embodiment 1 oleogel containing tannic acid.
Fig. 4 is the particle diameter distribution shadow that addition tannic acid and flaxseed gum remake freeze-drying soybean oil oleogel lotion
Ring.
Fig. 5 is the outside drawing containing tannic acid oleogel obtained by 1 forced air drying of embodiment.
Fig. 6 is influence of the addition tannic acid to soybean oil oleogel viscous-elastic behaviour obtained by forced air drying.
Fig. 7 is influence of the addition tannic acid to freeze-drying gained soybean oil oleogel viscous-elastic behaviour.
Fig. 8 is addition tannic acid to thiobarbituricacidα- growing amount in freeze-drying linseed oil oleogel storing process
Influence.
Fig. 9 is the absorption situation that laser confocal microscope characterizes complex emulsions oil droplets particle.
Embodiment
With reference to embodiment and attached drawing, the present invention is described in further detail, but embodiments of the present invention are unlimited
In this.
Embodiment 1
(1) 0.6g type B gelatins are weighed to be dissolved in 30mL distilled water with gelatin solution is made, weigh 0.0375g tannic acid
Add in 10mL distilled water and be made into 0.375% tannic acid solution, it is molten that tannic acid solution is gradually added into gelatin under stirring condition
Liquid forms gelatin-tannic acid composite solution, and system pH is adjusted to 6, at 200 rpm magnetic agitation 2h to stable system.
(2) 0.3g flaxseed gums are weighed to be dissolved in 10mL distilled water with obtained flaxseed gum solution；In gelatin-tannic acid
50mL soybean oils are slowly added in composite solution, 12000rpm high speed shear 1min, then add lotion by flaxseed gum solution
In, 12000rpm high speed shears 2min forms uniform complex emulsions.Final emulsion system oil content is 50% (v/v), and gelatin is dense
It is 0.0375% (w/v) to spend for 0.6% (w/v), tannin acid concentration, and flaxseed gum concentration is 0.3% (w/v).
(3) by complex emulsions vacuum freeze drier drying to constant weight obtained by step (2), then by dried product
Oleogel is obtained in 10000rpm shearings 1min.
Oleogel rheological equationm of state analysis method is as follows in embodiment：The viscoplasticity of oleogel uses Malvern kinexus
Pro rotational rheometers are characterized, and a diameter of 60mm of parallel-plate used, test temperature is 5 DEG C.By sample be placed in parallel-plate it
Between, gap 1mm.Amplitude scans：Shear stress scope is 1-1000Pa, FREQUENCY CONTROL 1Hz, record sample viscoelastic modulus with
The change of shear stress.Frequency scanning：Frequency range is 0.5-100rad/s, and shear stress control is 2Pa, records sample viscoelastic
Modulus with frequency change.
Oleogel fat oxidation 4stability determination is as follows in embodiment：Oleogel is placed in 30 DEG C of constant incubators
Storage, and results of regular determination oil oxidative stability.(1) measure of primary oxidation product-grease hydroperoxides：Claim 0.15g oil
Gel is in 10mL centrifuge tubes, and adding the mixture of 1.5mL isooctane and isopropanol, (mixed proportion of isooctane and isopropanol is
3：1 (v/v)), fully shaking (10s, 3 times) centrifuges (3600g, 2min) afterwards, takes 200 μ L of upper organic layer, adds 2.8mL 2：1
(v/v) in the methanol and butanol mixture of mixing, then the ammonium thiocyanate and 15 μ L ferrous ions of 15 μ L 3.94M are separately added into
(0.132M barium chlorides and 0.144M ferrous sulfate are with 1 for solution：1 ratio mixing), after reacting 20min, use visible light light-splitting
Photometer measures light absorption value under 510nm wavelength, and peroxide in sample is calculated by cumene hydroperoxide standard curve
Concentration.(2) measure of secondary oxidation product-thiobarbituric acid reaction thing (TBARS)：Take 0.75g oleogels to be added to carry
In the test tube of vice, add afterwards 3mL TBA test fluids (include 0.375% thiobarbituricacidα-, 15% trichloroacetic acid,
The dibutyl hydroxy toluene (BHT) of 0.25M HCl and 2% (w/v) mixes, and mixed liquor is after (90 DEG C) heating 10min of water-bath
Cooled down in frozen water, centrifuge (3600g, 20min) afterwards, supernatant measures light absorption value in 532nm.Using tetra- ethoxies of 1,1,3,3-
Base propane standard curve calculates thiobarbituric acid reaction thing concentration.
Detected using rheometer under the conditions of 5 DEG C of temperature, frequency 1Hz, be freeze-dried the oleogel of gained in linear glutinous bullet
The elastic modulus G in region ' and viscous modulus G " be respectively 30200Pa and 2800Pa.Oleogel amplitude scans and frequency scanning knot
Fruit can obtain elasticity modulus and be noticeably greater than viscous modulus.Illustrate that oleogel shows strong gel behavior, there is typical solid feature.
Fig. 3 is the outside drawing of oleogel obtained by freeze-drying, and as seen from the figure, oleogel is in gel solid state, is evenly distributed, and is presented
Translucent white.Fig. 4 is to add water to prepare lotion again to the oleogel of preparation to carry out particle size distribution, it can be found that gelatin-
Emulsion particle diameter prepared by tannic acid-flaxseed gum is significantly less than the lotion without the recasting of the oleogel of tannic acid and flaxseed gum,
Show that the addition of tannic acid and flaxseed gum is remarkably improved oleogel recasting emulsion intercalation method.
, can using confocal laser scanning microscope gelatin-tannic acid-flaxseed gum in the absorption (Fig. 9) of oil droplets
To find that three can form granular absorption in oil droplets, emulsion intercalation method is remarkably improved, avoids lotion in drying process
The aggregation unstable phenomenon of oil droplet occurs.
Embodiment 2
(1) 0.72g Gelatins are weighed and obtain gelatin solution in 20mL distilled water, weigh 0.09g grape pip original cyanine
Element, which is added in 10mL distilled water, is made into the grape pip procyanidin solution of 0.9% (w/v), by grape pip original cyanine under stirring condition
Plain solution is gradually added into gelatin solution and forms gelatin-grape pip procyanidin composite solution, and system pH is adjusted to 7, in 200rpm
Lower magnetic agitation 2h is to stable system.
(2) 60mL sunflower oils are slowly added in gelatin-grape pip procyanidin composite solution, 12000rpm is cut at a high speed
1min is cut, 0.36g flaxseed gums is weighed and is dissolved in 10mL distilled water and be configured to flaxseed gum solution, flaxseed gum solution is added
Enter in above-mentioned emulsion, 10000rpm high speed shears 2min forms uniform complex emulsions.Final emulsion system oil content is 60% (v/
V), gelatin concentration is 0.72% (w/v), and grape pip procyanidin concentration is 0.09% (w/v), and flaxseed gum concentration is 0.36%
(w/v)。
(3) by complex emulsions vacuum freeze drier drying to constant weight obtained by step (2), then by dried product
Oleogel is obtained in 9000rpm shearings 1min.
By the detection method described in embodiment 1, oleogel obtained by the present embodiment is measured in the linear glutinous elasticity for playing region
Modulus and viscous modulus are respectively 12700Pa and 2010Pa.Oleogel amplitude scans and frequency scanning result can obtain elasticity
Modulus is noticeably greater than viscous modulus.Illustrate that the oleogel that freeze-drying obtains shows strong gel behavior, there is typical solid fat
Feature.
Embodiment 3
The step of reference implementation example 1 and condition, difference are to replace vacuum freeze drier drying in step (3)
It is dry at into 60 DEG C of electric drying oven with forced convection.
By the detection method described in embodiment 1, measure the present embodiment and linearly sticked using oleogel obtained by forced air drying
The elasticity modulus and viscous modulus for playing region are respectively 860Pa and 121Pa.Oleogel amplitude scans and frequency scanning result
Obtain elasticity modulus and be noticeably greater than viscous modulus.Illustrate that oleogel shows gel behavior, there is typical solid feature.Fig. 5 is drum
Air-dry the outside drawing of dry gained oleogel, it can be seen that the white gel state of oleogel, has the function of hard fat and matter
Ground.Compared to, by being freeze-dried the oleogel (Fig. 3) prepared, the oleogel that forced air drying obtains is more soft, room temperature in embodiment 1
It is lower that immobilising emulsion state is presented, there is solid grease feature, therefore forced air drying can be obtained with the oil for preferably smearing characteristic
Gel, can be used as the substitute of smearing fat.Tannic acid promotes three to form self assembly particle with gelatin and flaxseed gum, in oil
Drop adsorption is played a supporting role, and avoids the aggregation and flocculation between oil droplet, and the grease improved in lotion drying process is stablized
Property.
Embodiment 4
The step of reference implementation example 1 and condition, difference are soybean oil in step (2) being substituted for linseed oil.
By the detection method described in embodiment 1, oleogel obtained by the present embodiment is measured in the linear glutinous elasticity for playing region
Modulus and viscous modulus are respectively 26800Pa and 3890Pa.Oleogel amplitude scans and frequency scanning result can obtain elasticity
Modulus is noticeably greater than viscous modulus.Illustrate that oleogel shows strong gel behavior, there is typical solid fatty character.Fig. 8 is flax
It is bright to add tannic acid with the change of storage time lipid second oxidation product TBARS value as seen from the figure for seed oil oleogel
It is aobvious to reduce degree of oxidation fatty in storage process oleogel, in the tenth day TBARS value from being not added with tannic acid
28.82 μm of ol/kg oil are reduced to the 25.71 μm of ol/kg oil added after tannic acid, therefore the addition of tannic acid is in oleogel
Lipid oxidation have obvious inhibiting effect.
Embodiment 5
The step of reference implementation example 2 and condition, difference be flaxseed gum in step (2) being substituted for xanthans,
Sunflower oil changes corn oil into, and grape pip procyanidin changes catechin into.
By the detection method described in embodiment 1, oleogel obtained by the present embodiment is measured in the linear glutinous elasticity for playing region
Modulus and viscous modulus are respectively 17600Pa and 2150Pa.Oleogel amplitude scans and frequency scanning result can obtain elasticity
Modulus is noticeably greater than viscous modulus.Illustrate that the oleogel that freeze-drying obtains shows strong gel behavior, there is typical solid fat
Feature.
Embodiment 6
The step of reference implementation example 1 and condition, difference are tannic acid being substituted for grape pip procyanidin, step
(2) soybean oil is substituted for linseed oil in, in step (3) vacuum freeze drier drying be substituted at 45 DEG C of vacuum drying chamber and do
It is dry.
By the detection method described in embodiment 1, oleogel obtained by the present embodiment is measured in the linear glutinous elasticity for playing region
Modulus and viscous modulus are respectively 10800Pa and 1470Pa.Oleogel amplitude scans and frequency scanning result can obtain elasticity
Modulus is noticeably greater than viscous modulus.Illustrate that oleogel shows strong gel behavior, there is typical solid fatty character.
Comparative example 1
(1) 0.6g Gelatins are weighed in 30mL distilled water, are dissolved under stirring condition, system pH is adjusted to 6,
Magnetic agitation 2h is to stable system under 200rpm.
(2) 50mL soybean oils are slowly added in gelatin solution, 12000rpm high speed shear 1min, weigh 0.3g linseeds
Glue is dissolved in 10mL distilled water, flaxseed gum solution is added in above-mentioned emulsion, 12000rpm high speed shears 2min is formed
Even complex emulsions.Final emulsion system oil content is 50% (v/v), and gelatin concentration is 0.6% (w/v), and flaxseed gum concentration is
0.3% (w/v).
(3), then will dry production by complex emulsions obtained by step (2) with being dried at 60 DEG C of electric drying oven with forced convection to constant weight
Product obtain oleogel in 10000rpm shearings 1min.
By the detection method described in embodiment 1, oleogel obtained by this comparative example is measured in the linear glutinous elasticity for playing region
Modulus and viscous modulus are respectively 560Pa and 50Pa.It is notable that the scanning of oleogel amplitude and frequency scanning can obtain elasticity modulus
More than viscous modulus, show that oleogel shows gel behavior.
Comparative example 2
With reference to the step of comparative example 1 and condition, difference are to do at 60 DEG C of electric drying oven with forced convection in step (3)
It is dry to be substituted for vacuum freeze drier drying.
By the detection method described in embodiment 1, oleogel obtained by this comparative example is measured in the linear glutinous elasticity for playing region
Modulus and viscous modulus are respectively 24700Pa and 4480Pa.Oleogel amplitude scans and frequency scanning can obtain elasticity modulus
Noticeably greater than viscous modulus, shows that oleogel shows gel behavior.Fig. 6 and Fig. 7 respectively illustrates addition tannic acid and air blast is done
The influence of the soybean oil oleogel rheological equationm of state made from dry and vacuum freeze drying, as seen from the figure with comparative example 1 and 2 without polyphenol
The oleogel of addition is compared, and the oleogel of tannic acid is with the addition of in embodiment 1 and embodiment 3 has the elasticity modulus of higher, table
The addition of bright polyphenol can promote the formation of solid fat network structure in drying process, significantly improve oleogel structural stability.
Above-described embodiment is the preferable embodiment of the present invention, but embodiments of the present invention and from above-described embodiment
Limitation, other any Spirit Essences without departing from the present invention with made under principle change, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (10)
1. a kind of oleogel rich in unrighted acid, it is characterised in that including following components：
The gelatin is 16 with polyphenol mass ratio：1~8：1；
The ratio of the parts by volume and mass parts is 1 mass parts：1 parts by volume=1g/mL.
2. a kind of oleogel rich in unrighted acid according to claim 1, it is characterised in that the gelatin is B
Type gelatin；Polyphenol is tannic acid, the one or more in grape pip procyanidin, catechin.
3. a kind of oleogel rich in unrighted acid according to claim 1, it is characterised in that described to be rich in insatiable hunger
Vegetable oil with aliphatic acid is soybean oil, the one or more in linseed oil, sunflower oil, rapeseed oil, corn oil.
4. a kind of oleogel rich in unrighted acid according to claim 1, it is characterised in that the polysaccharide is Asia
One or both of numb seed glue, xanthans.
5. the preparation method of oleogel of the claim 1-4 any one of them rich in unrighted acid, it is characterised in that bag
Include following steps：
(1) choose gelatin and polyphenol dissolves obtained aqueous solution respectively, more phenol solutions are uniformly mixed with gelatin solution, adjust solution
PH to 6~7, stirs to stable system and obtains gelatin-polyphenol complex, and gelatin is 16 with polyphenol mass ratio：1~8：1；
(2) gelatin-polyphenol complex is added in the vegetable oil rich in unrighted acid, emulsifying obtains lotion；Then
Polysaccharide solution is added into lotion, then emulsifying obtains complex emulsions；Complex emulsions system oil content is 50~60% (v/v),
Polysaccharide concentration is 0.3~0.36% (w/v), and gelatin concentration is 0.6~0.72% (w/v), polyphenol concentration for 0.0375~
0.09% (w/v)；
(3) oleogel is prepared：By complex emulsions drying obtained by step (2), homogeneous obtains the oil for being rich in unrighted acid
Gel.
6. the preparation method of the oleogel according to claim 5 rich in unrighted acid, it is characterised in that step
(1) mixing time is 1~2h.
7. the preparation method of the oleogel according to claim 5 rich in unrighted acid, it is characterised in that step
(2) handling 1~2min by high speed shear before polysaccharide solution is added makes solution emulsifying, passes through again after adding polysaccharide solution
High speed shear, which handles 2~3min, makes solution emulsifying；The high speed shear speed is 10000~15000r/min.
8. the preparation method of the oleogel according to claim 5 rich in unrighted acid, it is characterised in that step
(3) drying mode is the one or more in vacuum freeze drying, electric heating forced air drying, vacuum drying.
9. the preparation method of the oleogel according to claim 5 rich in unrighted acid, it is characterised in that step
(3) homogeneous is carried out by shearing 1~2min, shear rate is 9000~10000r/min.
10. oleogel of the claim 1-4 any one of them rich in unrighted acid is as healthy functions food ingredient
Using.
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