CN109942902A - A kind of purposes of plant extract rich in selenium composite membrane-forming regulator - Google Patents
A kind of purposes of plant extract rich in selenium composite membrane-forming regulator Download PDFInfo
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Abstract
The present invention provides a kind of purposes of plant extract rich in selenium composite membrane-forming regulator, belong to technical field of food storage, above-mentioned composite membrane-forming regulator contains selenium-rich tea extraction, the wolfberry fruit extract of selenium polysaccharide and tea polyphenols, can be used for preparing food or health care product packaging film.A kind of edibility protein film made from above-mentioned film forming regulator, including following ingredient and its parts by weight of utilizing: 40-60 parts of Gluten, 0-20 parts of protein,alcohol-soluble, film forming regulator 0.1-2 parts, 400-700 parts of 30-50% ethanol solution, 0-10 parts of glycerol, 0.02-0.1 parts of defoaming agent is also provided.The present invention regulator that forms a film can be improved the inoxidizability and antibiotic property of film, enhances the flexibility of film, improves film elongation at break, improve the compactness of film, improve the breaking strength of film, not will cause that film surface is coarse, and be conducive to improve the water stability and Se content of film.
Description
Technical field
The invention belongs to technical field of food storage, and in particular to a kind of plant extract rich in selenium composite membrane-forming regulator
Purposes.
Background technique
" environment and development " is the focal issue of world's common concern now.Plastic package material due to its usage amount is big,
Wide in variety, chemical stability is difficult to degrade by force, has become the main bugbear of environmental improvement.In face of environmental pollution and safety
The problems such as, each state all strive to find " green package " material come substituted for plastic packaging.In numerous " green package " research,
The research and development of edible packing material have become the hot spot of contemporary food packaging research.Up to the present, almost without can
Consumption packaging film obtains industrialized production and practical, commercial, it is most important the reason is that the mechanical strength of edible film not
Foot, water preventing ability are poor and without heat sealability.Protein film is as one of edible packing membrane, because having good mechanical property, the film of formation
The features such as homogeneous transparent, oxygen barrier is splendid, and in good taste, easy to digest, being rich in nutrition becomes the reason for being possible to substituted for plastic from now on
Think one of material.
Gluten is the by-product of wheat starch production.China's wheat annual output is 100,000,000 t or so, and is had increased year by year
Trend, up to 500,000 t, price can mutually compete Gluten gross annual output amount with chemical industry synthesis material, and meet today's society to ring
The demand of border protection and biodegradable material.Therefore, select Gluten as edible packing membrane from economical and environmentally friendly level
Material has complied with the demand in market.Gluten is mainly made of gliadin and glutenin, is good plant protein source, this
Body has very high nutritive value, and can form network structure with water and have excellent viscoplasticity, extensibility, water imbibition, liposuction
The unique physical characteristics such as emulsibility, film forming, there are also light grain alcohol fragrance.Natural Gluten protein leans on molecule
In hydrogen bond, ionic interaction, dipolar interaction, disulfide bond etc. come the structure that maintains its stable.By heating or acid,
Alkali, salt etc. comprehend these interactions of destruction, make protein subunit dissociation, molecule degeneration, intramolecular hydrophobic grouping, mercapto
Base is exposed, and protein molecule passes through the combination of hydrophobic bond, disulfide bond, forms dimensional network structure.Gluten film have compared with
Strong toughness；Good obstructing capacity, especially its resistance oxygen ability are better than polyethylene film, and the oxygen of food can be effectively prevented
Change；With outstanding oil resistance, packed especially suitable for fried food；And there is the unexistent good heat-sealing of other protein films
Property.But since glutelin amyloid proteins itself has certain hydrophily, the resistance of obtained Gluten film is moist limited, in certain journey
Its application in terms of food fresh keeping is limited on degree.Therefore, how to improve and improve Gluten protein film mechanical performance and
Moisture-proof characteristic is the key points and difficulties of current Gluten film research.
Summary of the invention
The purpose of the present invention is to provide a kind of plant extract rich in selenium composite membrane-forming regulators, which can
The inoxidizability and antibiotic property for improving film enhance the flexibility of film, improve film elongation at break, improve the compactness of film, improve
The breaking strength of film, not will cause that film surface is coarse, and be conducive to improve the water stability and Se content of film.
The technical solution that the present invention is taken to achieve the above object are as follows:
A kind of plant extract rich in selenium composite membrane-forming regulator, the selenium-rich tea extraction containing selenium polysaccharide.
The addition of selenium can change the structure of polysaccharide in polysaccharide, so that the variation of the electrically charged amount of polysaccharide, significant raising is more
The Scavenging activity and inoxidizability of sugared reducing power, base free radical, and then later use present invention film forming regulator system can be improved
The antioxygenic property of the film obtained；Contain higher amount uronic acid in selenium polysaccharide, hydrophily is good, is on the one hand easily inserted into film forming procedure
Protein molecule interchain participates in the bonding effect of protein, makes to weaken between protein molecule with intramolecular interaction, enhances film
Flexibility, reduce brittleness, and then improve film elongation at break, on the other hand can react to be formed with the amino on molecular weight of albumen
Cross-linked network structure, the active force between enhancing and albumen, so that the interaction between two-phase interface is stronger, by protein film
The double effects for playing enhancing and crosslinking improve the compactness of film, improve the breaking strength of film, but not keep having for film obvious
Surface particles sense, it is coarse not will cause film surface, and cross-linking reaction can consume hydrophily glutamine residue in protein
Quantity is conducive to the hydroscopicity for reducing film, and more stable network structure is conducive to improve the water stability of film；Selenium polysaccharide can also promote
Into Maillard reaction, stronger covalent cross-linking occurs for maillard reaction product and protein molecule interchain, to increase membrane material
Mechanical strength, and form insoluble compound, reduce the dissolubility of film；Finally, in selenium-rich tea polysaccharide selenium polysaccharide presence
Se content in film forming regulator can also be improved, and Se content and existing forms do not change in film forming procedure, mention for body
For the selenium source for being easy to be absorbed by organisms.
Preferably, selenium-rich tea extraction also contains tea polyphenols.The presence of tea polyphenols can enhance film mechanical strength and
Thermal stability, and film antibiotic property can be assigned because it can inhibit a variety of animals and plants pathogenic microorganisms；And part of tea polyphenols quilt
Including being wrapped in the cross-linked network of selenium polysaccharide and protein, the release of tea polyphenols can be delayed, to improve film antibiotic property
Persistence.
Preferably, Se rich tea is natural selenium-rich tea or artificial Se rich tea.
Preferably, method acquisition is prepared by the following procedure in selenium-rich tea extraction: will be in selenium-enriched tea leaf powder plus water, at high speed shear
It is extracted after reason, extracting solution is filtered under diminished pressure concentration again, dry to get selenium-rich extract.During high speed shear, there is cavitation erosion
Effect, mechanism, shearing effect play the role of collaboration: cavitation effect becomes the momentum of fluid in a very short period of time
Zero, to generate huge impact force action in surface of Plant callus cell；Mechanism is hole instrument high-speed rotation stirring enhancing solid-liquid
Two alternate frictions improve solute component from the surface of solids to the rate of solvent main diffusion；Shearing effect is high-speed shearing machine
Rotor high speed rotation generate the powerful kinetic energy of linear velocity bring, make material in the narrow gap of stator and rotor by liquid
Power shearing, liquid layer friction, hits the effects of tearing and turbulent flow at centrifugation extruding.Under the comprehensive function of these efficiency, solvent can
Rapid osmotic enters inside pollen cell, and intracellular containing substance is broken by the obstruction of solid-liquid interface, Flavonoid substances
It is greatly speeded up from solid-liquid surface to the rate of liquid phase main diffusion, so that entire extraction process is based on the diffusion mass transfer of solute,
Extraction efficiency is high.
Preferably, film forming regulator further includes wolfberry fruit extract.
Preferably, selenium-rich tea polysaccharide and wolfberry fruit extract weight ratio are 1:0.25-0.45 in film forming regulator.
Invention additionally discloses a kind of plant extract rich in selenium composite membrane-forming regulators to prepare food or health care product packaging film
In purposes.
The purpose of the present invention is to provide one kind to have stronger antioxidant activity, antibiotic property and Durability of antimicrobial effect, machinery
Intensity, water stability, the smooth edibility protein film in surface.
The technical solution that the present invention is taken to achieve the above object are as follows:
Invention additionally discloses a kind of edibility protein films, include above-mentioned film forming regulator.
Preferably, protein film further includes Gluten and/or protein,alcohol-soluble.
Preferably, protein film includes following ingredient and its parts by weight: 40-60 parts of Gluten, 0-20 parts of protein,alcohol-soluble, at
0.1-2 parts of film regulator, 400-700 parts of 30-50% ethanol solution, 0-10 parts of glycerol, 0.02-0.1 parts of defoaming agent.
Compared with prior art, the invention has the benefit that
The present invention forms a film regulator with stronger antioxidant activity and antibiotic property, can be improved the inoxidizability of film and resists
Bacterium property；Present invention film forming regulator can enhance the flexibility of film in film forming procedure, film elongation at break be improved, by albumen
Film plays the double effects of enhancing and crosslinking, increases the compactness of improvement film, improves the breaking strength of film, but not make the tool of film
There is apparent surface particles sense, it is coarse not to will cause film surface, and cross-linking reaction can consume hydrophily glutamine in protein
The quantity of residue is formed simultaneously insoluble compound, is conducive to the water stability for improving film；Present invention film forming regulator can mention
Se content in high film forming regulator, and Se content and existing forms do not change in film forming procedure, provide and are easy to for body
The selenium source being absorbed by organisms；Present invention film forming regulator can be used for preparing food or health care product packaging film, edibility obtained
Protein film has stronger antioxidant activity, antibiotic property and Durability of antimicrobial effect, mechanical strength, water stability, and surface is smooth.
Present invention employs above-mentioned technical proposals to provide a kind of purposes of plant extract rich in selenium composite membrane-forming regulator, more
The deficiencies in the prior art, reasonable design, easy operation are mended.
Detailed description of the invention
Fig. 1 is the SEM photograph of environmental microbes in test example 1 of the present invention.
Specific embodiment
It, below will be to embodiment party of the present invention to keep the purposes, technical schemes and advantages of embodiment of the present invention clearer
Technical solution in formula is clearly and completely described.The person that is not specified actual conditions in embodiment or embodiment, according to routine
The condition that condition or manufacturer suggest carries out.Reagents or instruments used without specified manufacturer, being can be by commercially available purchase
Buy the conventional products of acquisition.
A kind of purposes of plant extract rich in selenium composite membrane-forming regulator of embodiment of the present invention is carried out below specific
Explanation.
Some embodiments of the present invention provide a kind of plant extract rich in selenium composite membrane-forming regulator, contain selenium polysaccharide
Selenium-rich tea extraction.
The addition of selenium can change the structure of polysaccharide in polysaccharide, so that the variation of the electrically charged amount of polysaccharide, significant raising is more
The Scavenging activity and inoxidizability of sugared reducing power, base free radical, and then later use present invention film forming regulator system can be improved
The antioxygenic property of the film obtained；Contain higher amount uronic acid in selenium polysaccharide, hydrophily is good, is on the one hand easily inserted into film forming procedure
Protein molecule interchain participates in the bonding effect of protein, makes to weaken between protein molecule with intramolecular interaction, enhances film
Flexibility, reduce brittleness, and then improve film elongation at break, on the other hand can react to be formed with the amino on molecular weight of albumen
Cross-linked network structure, the active force between enhancing and albumen, so that the interaction between two-phase interface is stronger, by protein film
The double effects for playing enhancing and crosslinking improve the compactness of film, improve the breaking strength of film, but not keep having for film obvious
Surface particles sense, it is coarse not will cause film surface, and cross-linking reaction can consume hydrophily glutamine residue in protein
Quantity is conducive to the hydroscopicity for reducing film, and more stable network structure is conducive to improve the water stability of film；Selenium polysaccharide can also promote
Into Maillard reaction, stronger covalent cross-linking occurs for maillard reaction product and protein molecule interchain, to increase membrane material
Mechanical strength, and form insoluble compound, reduce the dissolubility of film；Finally, in selenium-rich tea polysaccharide selenium polysaccharide presence
Se content in film forming regulator can also be improved, and Se content and existing forms do not change in film forming procedure, mention for body
For the selenium source for being easy to be absorbed by organisms.
According in some embodiments, selenium-rich tea extraction also contains tea polyphenols.Tea polyphenols activity with higher, tea are more
The presence of phenol can not only participate in the cross-linking reaction in film forming procedure, enhance the mechanical strength and thermal stability of film, and can be because of it
It can inhibit a variety of animals and plants pathogenic microorganisms and assign film antibiotic property；And part of tea polyphenols are wrapped in selenium polysaccharide
In the cross-linked network of protein, the release of tea polyphenols can be delayed, to improve the persistence of film antibiotic property.
According in some embodiments, Se rich tea is natural selenium-rich tea or artificial Se rich tea.
According in some embodiments, method acquisition is prepared by the following procedure in selenium-rich tea extraction: being 1:10-15 by solid-liquid ratio
Water will be added in selenium-enriched tea leaf powder, is carried out after high speed shear processing 1-5min in temperature at shear rate 10000-30000rpm
Extraction time 1-3h at 50-70 DEG C, extracting solution is filtered under diminished pressure concentration again, dry to get selenium-rich extract.High speed shear process
In, play the role of cavitation effect, mechanism, shearing effect and play collaboration: cavitation effect makes the momentum of fluid when extremely short
It is interior to become zero, to generate huge impact force action in surface of Plant callus cell；Mechanism is hole instrument high-speed rotation stirring
Enhance the alternate friction of solid-liquid two, improves solute component from the surface of solids to the rate of solvent main diffusion；Shearing effect is high
The powerful kinetic energy of linear velocity bring that the rotor high speed rotation of fast cutter generates, makes material in the narrow gap of stator and rotor
In by aquashear, centrifugation extrudings, liquid layer friction, hit and tear and the effects of turbulent flow.Under the comprehensive function of these efficiency,
Solvent can rapid osmotic enter inside pollen cell, intracellular containing substance is broken by the obstruction of solid-liquid interface, yellow
Letones are greatly speeded up from solid-liquid surface to the rate of liquid phase main diffusion, so that entire extraction process is passed with the diffusion of solute
Based on matter, extraction efficiency is high.Obtained selenium-rich extract species not only contain selenium polysaccharide and tea polyphenols, but also contain water solubility
The substances such as amino acid, vitamin and γ-aminobutyric acid, wherein γ-aminobutyric acid can be made in film forming procedure by covalent bond
It is combined, is increased between protein molecular, between protein and selenium polysaccharide molecule and tea with protein molecular or selenium polysaccharide
It is finer and close to make its network structure, and reduces hydrophilic radical for bridging property between polyphenol and protein molecule, improves the water of film
Stability, at the same can be improved in film forming procedure respectively at compatibility, avoid tea polyphenols and selenium polysaccharide from depositing in film surface and produce
Raw scattering and diffusing reflection, maintain the surface flatness and light transmittance of film.
According in some embodiments, in order to improve the content of γ-aminobutyric acid in selenium-rich tea extraction, Se rich tea is extracted
The preparation method of object advanced optimize scheme include: by solid-liquid ratio be 1:10-15 will in selenium-enriched tea leaf powder be added concentration be
0.3-0.4% monosodium glutamate solution carries out after high speed shear processing 2-3min in temperature at shear rate 20000-25000rpm
Extraction time 1-3h at 50-60 DEG C of degree, extracting solution is filtered under diminished pressure concentration again, dry to get selenium-rich extract.Above-mentioned preparation side
Method can improve the activity of glutamate decarboxylase, and glutamic acid is promoted to carry out decarboxylic reaction process, reinforce turn of alanine and pyruvic acid
Ammonia effect, increases the amount of γ-aminobutyric acid.
According in some embodiments, film forming regulator further includes wolfberry fruit extract, wherein including Thick many candies, flavonoids
Close object and chlorogenic acid.Above-mentioned wolfberry fruit extract is obtained by following preparation method:
Deionized water will be added in wolfberry fruit powder, stirring is extracted, it is centrifuged 5-15min at 5000-10000rpm after cooling, on
Clear liquid is filtered under diminished pressure concentration, dry to get wolfberry fruit extract.
It is 1:0.25- according to selenium-rich tea polysaccharide and wolfberry fruit extract weight ratio in the regulator that in some embodiments, forms a film
0.45。
Some embodiments of the present invention provide a kind of plant extract rich in selenium composite membrane-forming regulator and are preparing food
Or the purposes in health care product packaging film.Above-mentioned food can be fresh based food, can also be prepared food based food and quick-frozen class food
Product or dilated food etc..
Some embodiments of the present invention provide a kind of edibility protein film, include above-mentioned film forming regulator.
According in some embodiments, protein film further includes Gluten and/or protein,alcohol-soluble.
According in some embodiments, protein film includes following ingredient and its parts by weight: 40-60 parts of Gluten, alcohol-soluble
0-20 parts of albumen, film forming regulator 0.1-2 parts, 400-700 parts of 30-50% ethanol solution, 0-10 parts of glycerol, defoaming agent 0.02-
0.1 part.
In the following, being described further in conjunction with specific embodiments to embodiment of the present invention.
Embodiment 1:
A kind of plant extract rich in selenium composite membrane-forming regulator, the selenium-rich tea extraction and Chinese holly for being 1:0.25 containing weight ratio
Qi extract.Method acquisition is prepared by the following procedure in above-mentioned selenium-rich tea extraction: being that 1:10 will add in selenium-enriched tea leaf powder by solid-liquid ratio
Water carries out the extraction time 1h under temperature 50 C after high speed shear processing 1min at shear rate 10000rpm, and extracting solution is again
It is filtered under diminished pressure concentration, it is dry to get selenium-rich extract.
A kind of plant extract rich in selenium composite membrane-forming regulator is preparing the purposes in food or health care product packaging film.
A kind of edibility protein film, including following ingredient and its parts by weight: 40 parts of Gluten, film forming 0.1 part of regulator,
30% 400 parts of ethanol solution, 0.02 part of defoaming agent.
Embodiment 2:
A kind of plant extract rich in selenium composite membrane-forming regulator, the selenium-rich tea extraction and Chinese holly for being 1:0.34 containing weight ratio
Qi extract.Method acquisition is prepared by the following procedure in above-mentioned selenium-rich tea extraction: being that 1:12 will add in selenium-enriched tea leaf powder by solid-liquid ratio
Water carries out the extraction time 2h at 55 DEG C of temperature after high speed shear processing 3min at shear rate 22000rpm, and extracting solution is again
It is filtered under diminished pressure concentration, it is dry to get selenium-rich extract.
Alpha-aminobutyric acid content in gained selenium-enriched plant extracting solution is measured using HPLC method.
Derivative reaction: taking Tea Samples or 100 μ L of GABA titer in sample bottle, and the derivative liquid of o-phthalaldehyde is added
2min is stood after 1000 μ L, vortex oscillation 5s, is crossed 0.45 μm of miillpore filter, is taken 20 μ L sample introductions.
Chromatographiccondition: chromatographic column: Intertsil ODS-C18 column (4.6mm × 250mm, 5 μm)；Mobile phase: flowing
Phase A is the sodium acetate of 15mmol/L, with 4% glacial acetic acid tune pH value to 5.90 ± 0.05；Mobile phase B is pure acetonitrile；Flow velocity is
1mL/min；30 DEG C of column temperature；20 μ L of sample volume；Detection wavelength is 332nm；Gradient elution program is as shown in table 1.Selenium-enriched plant mentions
Taking GABA content in liquid is 0.113mg/mL.
1 gradient elution program table of table
A kind of plant extract rich in selenium composite membrane-forming regulator is preparing the purposes in food or health care product packaging film.
A kind of edibility protein film, including following ingredient and its parts by weight: 50 parts of Gluten, 10 parts of protein,alcohol-soluble, at
1.2 parts of film regulator, 550 parts of 40% ethanol solution, 5 parts of glycerol, 0.06 part of defoaming agent.
Embodiment 3:
A kind of plant extract rich in selenium composite membrane-forming regulator, the selenium-rich tea extraction and Chinese holly for being 1:0.45 containing weight ratio
Qi extract.Method acquisition is prepared by the following procedure in above-mentioned selenium-rich tea extraction: being that 1:15 will add in selenium-enriched tea leaf powder by solid-liquid ratio
Water carries out the extraction time 3h under temperature 70 C after high speed shear processing 5min at shear rate 30000rpm, and extracting solution is again
It is filtered under diminished pressure concentration, it is dry to get selenium-rich extract.
A kind of plant extract rich in selenium composite membrane-forming regulator is preparing the purposes in food or health care product packaging film.
A kind of edibility protein film, including following ingredient and its parts by weight: 60 parts of Gluten, 20 parts of protein,alcohol-soluble, at
2 parts of film regulator, 700 parts of 50% ethanol solution, 10 parts of glycerol, 0.1 part of defoaming agent.
Embodiment 4:
A kind of plant extract rich in selenium composite membrane-forming regulator, the selenium-rich tea extraction and Chinese holly for being 1:0.34 containing weight ratio
Qi extract.Method acquisition is prepared by the following procedure in above-mentioned selenium-rich tea extraction: being that 1:12 will add in selenium-enriched tea leaf powder by solid-liquid ratio
Entering concentration is 0.35% monosodium glutamate solution, is carried out after high speed shear processing 3min in temperature 55 at shear rate 22000rpm
Extraction time 2h at DEG C, extracting solution is filtered under diminished pressure concentration again, dry to get selenium-rich extract.In selenium-enriched plant extracting solution
GABA content is 0.905mg/mL, GABA content in the selenium-enriched plant extracting solution obtained much larger than embodiment 2.
A kind of plant extract rich in selenium composite membrane-forming regulator is preparing the purposes in food or health care product packaging film.
A kind of edibility protein film, including following ingredient and its parts by weight: 50 parts of Gluten, 10 parts of protein,alcohol-soluble, at
1.2 parts of film regulator, 550 parts of 40% ethanol solution, 5 parts of glycerol, 0.06 part of defoaming agent.
Comparative example 1:
The difference of this comparative example and the technical solution of embodiment 2 is: being free of Se rich tea in this comparative example film forming regulator
Extract.
Comparative example 2:
The difference of this comparative example and the technical solution of embodiment 2 is: being mentioned in this comparative example film forming regulator with common tea
Object is taken to replace selenium-rich tea extraction, preparation method is consistent.
Comparative example 3:
The difference of this comparative example and the technical solution of embodiment 2 is: mentioning in this comparative example film forming regulator without fructus lycii
Take object.
Test example 1:
The performance measurement of edibility protein film
1. the measurement of mechanical performance (tensile strength and elongation at break)
Referring to national standard GB 13022-91, and make suitably modified, film sample size 100mm × 15mm on this basis, marks
It is measured away from 50mm, test speed 50mm/min using micro-control electronic universal tester.Three parallel samples are done every time, are taken
Average value.
Tensile strength is calculated as follows:
TS=P/S；
In formula, TSRepresent tensile strength (MPa)；P represents maximum pull (N)；S represents the cross-sectional area (mm of sample2)。
Elongation at break is calculated as follows:
E=(L1-L0)/L0× 100%；
In formula, E represents sample fracture elongation (%)；L0Represent the distance (mm) between the original graticule of sample；L1Represent sample
Distance (mm) when fracture between graticule.The results are shown in Table 2.
2. water solubility measurement
Film is dried under conditions of 105 DEG C to constant weight, is put into the beaker for filling distilled water after weighing, it is molten at room temperature
Solution for 24 hours, then by film is dried under conditions of 105 DEG C to constant weight, weighing, is calculated according to mass change water-soluble.As a result such as 2 institute of table
Show.
The mechanical performance of 2 edibility protein film of table and water-soluble measurement result
| Tensile strength (MPa) | Elongation at break (%) | Water-soluble (%) | |
| Embodiment 2 | 3.76 | 180.2 | 15.3 |
| Embodiment 4 | 3.90 | 195.4 | 10.4 |
| Comparative example 1 | 3.48 | 160.8 | 32.3 |
| Comparative example 2 | 3.57 | 168.7 | 25.4 |
| Comparative example 3 | 3.64 | 172.2 | 19.7 |
As shown in Table 2, the tensile strength of 4 film of embodiment, elongation at break and water solubility are better than embodiment 2, this explanation
γ-aminobutyric acid can be combined in film forming procedure by covalent bond effect and protein molecular or selenium polysaccharide, increase egg
Between white molecule, between protein and selenium polysaccharide molecule and the bridging property between tea polyphenols and protein molecule, make its network
Structure is finer and close, and reduces hydrophilic radical, improves the water stability of film；The tensile strength of embodiment 2, elongation at break and
Water solubility is better than comparative example 1, comparative example 2, comparative example 3, and the tensile strength of comparative example 3, elongation at break and water solubility are equal
It is better than comparative example 1, comparative example 2, this illustrates that selenium polysaccharide can improve the compactness of film, improves the raising film elongation at break of film and breaks
Resistance to spalling is conducive to the hydroscopicity for reducing film, improves the water stability of film.
3.SEM analysis
After carrying out metal spraying processing to sample surfaces, amplify 2.00k times under the acceleration voltage of 3.0kV, with scanning electron microscope pair
Sample surfaces are observed, and Fig. 1 is the SEM photograph of environmental microbes.A is embodiment 2 in Fig. 1, and a is embodiment 4, c comparison
Example 1, d comparative example 2, e comparative example 3.From figure 1 it appears that the surface smoothness of 3 film of embodiment 2 and comparative example is better than comparison
Example 1 and comparative example 3, illustrate the presence of selenium polysaccharide will not make film have apparent surface particles sense, it is thick not will cause film surface
It is rough；The surface smoothness of 4 film of embodiment is better than embodiment 2, this illustrates that γ-aminobutyric acid can be improved film forming in film forming procedure
In the process respectively at compatibility, maintain the surface flatness of film.
The prior art of routine techniques dawn known to those skilled in the art in above-described embodiment, therefore herein no longer in detail
It repeats.
The above embodiments are only used to illustrate the present invention, and not limitation of the present invention, the ordinary skill people of this field
Member can also make a variety of changes and modification without departing from the spirit and scope of the present invention.Therefore, all equivalent
Technical solution also belong to scope of the invention, scope of patent protection of the invention should be defined by the claims.
Claims (10)
1. a kind of plant extract rich in selenium composite membrane-forming regulator, it is characterised in that: the selenium-rich tea extraction containing selenium polysaccharide.
2. a kind of plant extract rich in selenium composite membrane-forming regulator according to claim 1, it is characterised in that: the richness
Selenium tea extraction also contains tea polyphenols.
3. a kind of plant extract rich in selenium composite membrane-forming regulator according to claim 1, it is characterised in that: the richness
Selenium tea is natural selenium-rich tea or artificial Se rich tea.
4. a kind of plant extract rich in selenium composite membrane-forming regulator according to claim 1 or 2 or 3, it is characterised in that: institute
Method acquisition is prepared by the following procedure in the selenium-rich tea extraction stated: will add water in selenium-enriched tea leaf powder, is mentioned after high speed shear processing
It takes, extracting solution is filtered under diminished pressure concentration again, dry to get selenium-rich extract.
5. a kind of plant extract rich in selenium composite membrane-forming regulator according to claim 1 or 2 or 3 or 4, feature exist
In: the film forming regulator further includes wolfberry fruit extract.
6. a kind of plant extract rich in selenium composite membrane-forming regulator according to claim 5, it is characterised in that: it is described at
Selenium-rich tea polysaccharide and wolfberry fruit extract weight ratio are 1:0.25-0.45 in film regulator.
7. a kind of plant extract rich in selenium composite membrane-forming regulator described in any one of claims 1-6 is preparing food or health care
Purposes in product packaging film.
8. a kind of edibility protein film, it is characterised in that: contain a kind of selenium-enriched plant extraction described in any one of claims 1-6
Object composite membrane-forming regulator.
9. a kind of edible boilogical film according to claim 8, it is characterised in that: the protein film further includes Gluten
And/or protein,alcohol-soluble.
10. a kind of edible boilogical film according to claim 8 or claim 9, it is characterised in that: the protein film includes as follows
Ingredient and its parts by weight: 40-60 parts of Gluten, 0-20 parts of protein,alcohol-soluble, regulator 0.1-2 parts of film forming, 30-50% ethyl alcohol are molten
400-700 parts of liquid, 0-10 parts of glycerol, 0.02-0.1 parts of defoaming agent.
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| CN111357991A (en) * | 2020-03-18 | 2020-07-03 | 华熙生物科技股份有限公司 | Edible water-soluble paper and preparation method thereof |
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