CN105111510B - It is a kind of can antibacterial and oxidation resistant food fresh keeping membrane preparation method - Google Patents
It is a kind of can antibacterial and oxidation resistant food fresh keeping membrane preparation method Download PDFInfo
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- CN105111510B CN105111510B CN201510572913.5A CN201510572913A CN105111510B CN 105111510 B CN105111510 B CN 105111510B CN 201510572913 A CN201510572913 A CN 201510572913A CN 105111510 B CN105111510 B CN 105111510B
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Abstract
The invention discloses it is a kind of can antibacterial and oxidation resistant food fresh keeping membrane preparation method, the method comprises the following steps：(1) Extracted From Oil-tea-cake is extracted at 80~95 DEG C with ethanol solution, is filtered, obtain extract solution；(2) by extracting liquid decoloration, evaporation solvent concentrates extract solution, obtains Extracted From Oil-tea-cake extract；(3) it is edible gelatin and Extracted From Oil-tea-cake extract is soluble in water, obtain the aqueous solution；In the lactic acid that pulullan polysaccharide is dissolved in, lactic acid solution is obtained；The aqueous solution is mixed with lactic acid solution again, is emulsified, obtain film liquid；In the film liquid, the concentration of Extracted From Oil-tea-cake extract is 10~20wt%, and the concentration of edible gelatin is 0.3~0.8wt%, and the concentration of lactic acid is 1~2wt%, and the concentration of pulullan polysaccharide is 1~2wt%；(4) by the film liquid homogeneous in step (3), refinement；It is degassed again, curtain coating, dry, take off film, obtain food fresh keeping membrane.The preservative film can not only utilize Extracted From Oil-tea-cake, also with antibacterial and antioxygenic property.
Description
Technical field
The present invention relates to it is a kind of can antibacterial and oxidation resistant food fresh keeping membrane preparation method, belong to packaging material for food skill
Art field.
Background technology
The environmental pollution that the wasting of resources and its discarded object caused with plastic package material are caused is increasingly serious, people couple
The packaging of commodity, particularly proposes requirement higher to food and pharmaceutical packing.The environment being made using natural polymer
Friendly biopolymer materials are increasingly taken seriously.Wherein edible film is extensive, edible and pollution-free etc. excellent with its raw material sources
Point, the big focus as area researches such as food, medicine and packagings, and achieve certain achievement.
Material for preparing food fresh keeping membrane mainly has：Lipid, protein and polysaccharide etc..Wherein protein and starch etc.
Material easy cooperating microorganisms in itself, and some are susceptible to each kinds of oxidation reaction with packaged material, therefore with antibacterial
Food fresh keeping membrane with anti-oxidation function will enjoy the favor of people.But the antiseptic and antioxidant due to synthesizing have certain
Toxic and side effect, with the enhancing of people's awareness of safety, the antiseptic and antioxidant of plant origin are because of its natural sex and its height
Security and extensively paid attention to, and derive from antiseptic and antioxidant in agriculture and forestry organic waste material (polyphenol such as in Extracted From Oil-tea-cake and
Tea Saponin) more paid close attention to by people.
The mostly of report are that the materials such as the polyphenol and Tea Saponin in Extracted From Oil-tea-cake are directly extracted in existing patent document,
To add in various materials, Extracted From Oil-tea-cake extract is directly utilized and is had not been reported.
The content of the invention
Present invention solves the technical problem that being that Extracted From Oil-tea-cake extract is directly utilized, applied in food fresh keeping membrane
To prepare antibacterial and oxidation resistant packaging material for food.
The technical scheme is that, there is provided it is a kind of can antibacterial and oxidation resistant food fresh keeping membrane preparation method, it is special
Levy and be, comprise the following steps：
(1) Extracted From Oil-tea-cake is extracted at 80~95 DEG C with ethanol solution, is filtered, obtain extract solution；
(2) by extracting liquid decoloration, evaporation solvent concentrates extract solution, obtains Extracted From Oil-tea-cake extract；
(3) it is edible gelatin and Extracted From Oil-tea-cake extract is soluble in water, obtain the aqueous solution；The lactic acid that pulullan polysaccharide is dissolved in
In, obtain lactic acid solution；The aqueous solution is mixed with lactic acid solution again, is emulsified, obtain film liquid；In the film liquid, Extracted From Oil-tea-cake extract
Concentration be 10~20wt%, the concentration of edible gelatin is 0.3~0.8wt%, and the concentration of lactic acid is 1~2wt%, pulullan polysaccharide
Concentration be 1~2wt%；
(4) by the film liquid homogeneous in step (3), refinement；It is degassed again, curtain coating, dry, take off film, obtain food fresh keeping membrane.
Further, in step (3), the concentration of the edible gelatin is 0.5wt%.
Further, in step (3), the concentration of the pulullan polysaccharide is 1.5wt%.
Further, in step (3), the concentration of the lactic acid is 1.5wt%.
Further, in step (4), the dry condition is：30~50h is dried at 40~60 DEG C.
Further, in step (4), the number of times of the degassing is 5~8 times.
Further, in step (1), the volume fraction of ethanol is 60~80% in the ethanol solution.
Further, in step (1), Extracted From Oil-tea-cake is repeatedly extracted with ethanol solution, is filtered, filtrate is merged into extraction
Liquid.
Further, in step (3), the time of the emulsification is 15~30min.
Lactic acid has very strong anti-corrosive fresh-keeping effect and hygroscopicity, with regulation pH values, antibacterial, holding film color and luster and humidity
Deng effect, while also helping polysaccharide, protein and active component is mutually dissolved in Extracted From Oil-tea-cake extract, hydrotropy is played
Effect.
During Extracted From Oil-tea-cake extract is applied to food fresh keeping membrane by the present invention, the application field of oil tea accessory substance is widened, obtained
The food fresh keeping membrane with antibiotic property and antioxygenic property has been arrived, the same of the high value added utilization of oil tea accessory substance is being realized
When, theory and method with reference value are provided for the research of packaging material for food.
The beneficial effects of the present invention are：Using polysaccharide and protein component in Extracted From Oil-tea-cake, with pulullan polysaccharide and bright
Glue is the base material of food fresh keeping membrane, and lactic acid is solvent, prepares food fresh keeping membrane.Raw material sources are extensive, low cost, and the food for preparing
Product preservative film mechanical performance relatively strong, barrier property is higher.The antibacterial material and polyphenoils in Extracted From Oil-tea-cake are make use of simultaneously, plus
Work process is simple, low cost has no toxic side effect substantially, and the food fresh keeping membrane of preparation has good antibiotic property and inoxidizability
Energy.
Specific embodiment
With reference to embodiment, the invention will be further described.
Embodiment 1
The present embodiment provides a kind of preparation method of food fresh keeping membrane, comprises the following steps that：
(1) g of Extracted From Oil-tea-cake 100 that 20 mesh are crossed after crushing is taken, is placed in beaker, add the ethanol of 500ml 70%（Volume fraction,
Similarly hereinafter）, 90 DEG C of min of constant temperature water bath ultrasonic-leaching 120, filtering.Filter residue adds the ethanol of 500 ml 70%, 90 DEG C of water-bath perseverances
The min of warm ultrasonic-leaching 120, filtering, is repeated 2 times, and the filtrate of 3 extractions merges into extract solution.
(2) extract solution is mixed into 60 DEG C of constant temperature water baths with atlapulgite and stirs 60 min, centrifugal filtration must decolourize filtrate,
It is concentrated under reduced pressure to original volume 1/5 with Rotary Evaporators at 60 DEG C, Extracted From Oil-tea-cake extract is obtained after being then vacuum dried.
(3) edible gelatin, Extracted From Oil-tea-cake extract are added in water, and in 80 DEG C of min of water-bath 60, it is fully dissolved；
The aqueous solution, adds pulullan polysaccharide in lactic acid, obtain lactic acid solution, and the aqueous solution obtains film liquid, film with lactic acid solution mixing and emulsifying 15min
Extracted From Oil-tea-cake extract, pulullan polysaccharide, lactic acid, edible gelatin concentration are respectively 20wt%, 1.5wt%, 1wt%, 0.3wt% in liquid.
(4) film liquid through homogeneous, refinement (homogenization pressure is 450kgf/cm) make mixed liquor in each composition be sufficiently mixed；Film liquid
It is put into vacuum degassing machine and deaerates 8 times, removes the gas in film liquid；The film liquid for having deaerated is poured into film forming device-homemade glass
Plate (20cm × 20cm), each glass plate pours into film liquid 100ml, flow casting molding；The glass plate that will be cast is placed into constant temperature and does
In dry case, 40h is dried at 50 DEG C, constantly observation, it is to be dried after take off film, i.e., to food fresh keeping membrane.
The performance test of food fresh keeping membrane：Tensile strength 97.21MPa, fracture elongation 13.48%, moisture-vapor transmission
109.08g/m2Day, OTR oxygen transmission rate 0.15mL/ m2Day, grease transmitance is not detected, and light transmittance is under 600nm
90.37%, molten water time 20s.
Embodiment 2
The present embodiment provides a kind of preparation method of food fresh keeping membrane, comprises the following steps that：
(1) g of Extracted From Oil-tea-cake 100 that 20 mesh are crossed after crushing is taken, is placed in beaker, add the ethanol of 500ml 60%, 85 DEG C of water-baths
Constant-temperature ultrasonic extracts 120 min, filtering.Filter residue adds the ethanol of 500 ml 60%, 85 DEG C of constant temperature water bath ultrasonic-leachings 120
Min, filtering, is repeated 2 times, and the filtrate of 3 extractions merges into extract solution.
(2) extract solution is mixed into 60 DEG C of constant temperature water baths with atlapulgite and stirs 60 min, centrifugal filtration must decolourize filtrate,
It is concentrated under reduced pressure to original volume 1/5 with Rotary Evaporators at 60 DEG C, Extracted From Oil-tea-cake extract is obtained after being then vacuum dried.
(3) edible gelatin, Extracted From Oil-tea-cake extract are added in water, and in 80 DEG C of min of water-bath 60, it is fully dissolved；
The aqueous solution, adds pulullan polysaccharide in lactic acid, obtain lactic acid solution, and the aqueous solution obtains film liquid, film with lactic acid solution mixing and emulsifying 30min
In liquid Extracted From Oil-tea-cake extract, pulullan polysaccharide, lactic acid, edible gelatin concentration be respectively 15wt%, 1.5wt%, 1.5wt%,
0.5wt%。
(4) film liquid through homogeneous, refinement (homogenization pressure is 450kgf/cm) make mixed liquor in each composition be sufficiently mixed；Film liquid
It is put into vacuum degassing machine and deaerates 6 times, removes the gas in film liquid；The film liquid for having deaerated is poured into film forming device-homemade glass
Plate (20cm × 20cm), each glass plate pours into film liquid 100ml, flow casting molding；The glass plate that will be cast is placed into constant temperature and does
In dry case, 50h is dried at 40 DEG C, constantly observation, it is to be dried after take off film, i.e., to food fresh keeping membrane.
The performance test of food fresh keeping membrane：Tensile strength 95.48MPa, fracture elongation 14.25%, moisture-vapor transmission
102.35g/m2Day, OTR oxygen transmission rate 0.17mL/ m2Day, grease transmitance is not detected, and light transmittance is under 600nm
94.25%, molten water time 23s.
Embodiment 3
The present embodiment provides a kind of preparation method of food fresh keeping membrane, comprises the following steps that：
(1) g of Extracted From Oil-tea-cake 100 that 20 mesh are crossed after crushing is taken, is placed in beaker, add the ethanol of 500ml 60%, 95 DEG C of water-baths
Constant-temperature ultrasonic extracts 120 min, filtering.Filter residue adds the ethanol of 500 ml 60%, 95 DEG C of constant temperature water bath ultrasonic-leachings 120
Min, filtering, is repeated 2 times, and the filtrate of 3 extractions merges into extract solution.
(2) extract solution is mixed into 60 DEG C of constant temperature water baths with atlapulgite and stirs 60 min, centrifugal filtration must decolourize filtrate,
It is concentrated under reduced pressure to original volume 1/5 with Rotary Evaporators at 60 DEG C, Extracted From Oil-tea-cake extract is obtained after being then vacuum dried.
(3) edible gelatin, Extracted From Oil-tea-cake extract are added in water, and in 80 DEG C of min of water-bath 60, it is fully dissolved；
The aqueous solution, adds pulullan polysaccharide in lactic acid, obtain lactic acid solution, and the aqueous solution obtains film liquid, film with lactic acid solution mixing and emulsifying 30min
Extracted From Oil-tea-cake extract, pulullan polysaccharide, lactic acid, edible gelatin concentration are respectively 10wt%, 1wt%, 1.5wt%, 0.8wt% in liquid.
(4) film liquid through homogeneous, refinement (homogenization pressure is 450kgf/cm) make mixed liquor in each composition be sufficiently mixed；Film liquid
It is put into vacuum degassing machine and deaerates 5 times, removes the gas in film liquid；The film liquid for having deaerated is poured into film forming device-homemade glass
Plate (20cm × 20cm), each glass plate pours into film liquid 100ml, flow casting molding；The glass plate that will be cast is placed into constant temperature and does
In dry case, 50h is dried at 50 DEG C, constantly observation, it is to be dried after take off film, i.e., to food fresh keeping membrane.
The performance test of food fresh keeping membrane：Tensile strength 98.34MPa, fracture elongation 15.12%, moisture-vapor transmission
111.03g/m2Day, OTR oxygen transmission rate 0.18mL/ m2Day, grease transmitance is not detected, and light transmittance is under 600nm
92.51%, molten water time 21s.
Embodiment 4
The present embodiment provides a kind of preparation method of food fresh keeping membrane, comprises the following steps that：
(1) g of Extracted From Oil-tea-cake 100 that 20 mesh are crossed after crushing is taken, is placed in beaker, add the ethanol of 500ml 80%, 90 DEG C of water-baths
Constant-temperature ultrasonic extracts 120 min, filtering.Filter residue adds the ethanol of 500 ml 80%, 90 DEG C of constant temperature water bath ultrasonic-leachings 120
Min, filtering, is repeated 2 times, and the filtrate of 3 extractions merges into extract solution.
(2) extract solution is mixed into 60 DEG C of constant temperature water baths with atlapulgite and stirs 60 min, centrifugal filtration must decolourize filtrate,
It is concentrated under reduced pressure to original volume 1/5 with Rotary Evaporators at 60 DEG C, Extracted From Oil-tea-cake extract is obtained after being then vacuum dried.
(3) edible gelatin, Extracted From Oil-tea-cake extract are added in water, and in 80 DEG C of min of water-bath 60, it is fully dissolved；
The aqueous solution, adds pulullan polysaccharide in lactic acid, obtain lactic acid solution, and the aqueous solution obtains film liquid, film with lactic acid solution mixing and emulsifying 25min
Extracted From Oil-tea-cake extract, pulullan polysaccharide, lactic acid, edible gelatin concentration are respectively 20wt%, 2wt%, 1wt%, 0.3wt% in liquid.
(4) film liquid through homogeneous, refinement (homogenization pressure is 450kgf/cm) make mixed liquor in each composition be sufficiently mixed；Film liquid
It is put into vacuum degassing machine and deaerates 8 times, removes the gas in film liquid；The film liquid for having deaerated is poured into film forming device-homemade glass
Plate (20cm × 20cm), each glass plate pours into film liquid 100ml, flow casting molding；The glass plate that will be cast is placed into constant temperature and does
In dry case, 30h is dried at 60 DEG C, constantly observation, it is to be dried after take off film, i.e., to food fresh keeping membrane.
The performance test of food fresh keeping membrane：Tensile strength 96.78MPa, fracture elongation 14.53%, moisture-vapor transmission
108.25g/m2Day, OTR oxygen transmission rate 0.15mL/ m2Day, grease transmitance is not detected, and light transmittance is under 600nm
91.27%, molten water time 20s.
Embodiment 5
The present embodiment provides a kind of preparation method of food fresh keeping membrane, comprises the following steps that：
(1) g of Extracted From Oil-tea-cake 100 that 20 mesh are crossed after crushing is taken, is placed in beaker, add the ethanol of 500ml 70%, 90 DEG C of water-baths
Constant-temperature ultrasonic extracts 120 min, filtering.Filter residue adds the ethanol of 500 ml 70%, 90 DEG C of constant temperature water bath ultrasonic-leachings 120
Min, filtering, is repeated 2 times, and the filtrate of 3 extractions merges into extract solution.
(2) extract solution is mixed into 60 DEG C of constant temperature water baths with atlapulgite and stirs 60 min, centrifugal filtration must decolourize filtrate,
It is concentrated under reduced pressure to original volume 1/5 with Rotary Evaporators at 60 DEG C, Extracted From Oil-tea-cake extract is obtained after being then vacuum dried.
(3) edible gelatin, Extracted From Oil-tea-cake extract are added in water, and in 80 DEG C of min of water-bath 60, it is fully dissolved；
The aqueous solution, adds pulullan polysaccharide in lactic acid, obtain lactic acid solution, and the aqueous solution obtains film liquid, film with lactic acid solution mixing and emulsifying 20min
Extracted From Oil-tea-cake extract, pulullan polysaccharide, lactic acid, edible gelatin concentration are respectively 20wt%, 1wt%, 2wt%, 0.3wt% in liquid.
(4) film liquid through homogeneous, refinement (homogenization pressure is 450kgf/cm) make mixed liquor in each composition be sufficiently mixed；Film liquid
It is put into vacuum degassing machine and deaerates 7 times, removes the gas in film liquid；The film liquid for having deaerated is poured into film forming device-homemade glass
Plate (20cm × 20cm), each glass plate pours into film liquid 100ml, flow casting molding；The glass plate that will be cast is placed into constant temperature and does
In dry case, 45h is dried at 50 DEG C, constantly observation, it is to be dried after take off film, i.e., to food fresh keeping membrane.
The performance test of food fresh keeping membrane：Tensile strength 98.233MPa, fracture elongation 15.07%, moisture-vapor transmission
107.86g/m2Day, OTR oxygen transmission rate 0.16mL/ m2Day, grease transmitance is not detected, and light transmittance is under 600nm
92.13%, molten water time 19s.
Claims (9)
1. it is a kind of can antibacterial and oxidation resistant food fresh keeping membrane preparation method, it is characterised in that comprise the following steps：
(1) Extracted From Oil-tea-cake is extracted at 80~95 DEG C with ethanol solution, is filtered, obtain extract solution；
(2) by extracting liquid decoloration, evaporation solvent concentrates extract solution, obtains Extracted From Oil-tea-cake extract；
(3) it is edible gelatin and Extracted From Oil-tea-cake extract is soluble in water, obtain the aqueous solution；In the lactic acid that pulullan polysaccharide is dissolved in, obtain
Lactic acid solution；The aqueous solution is mixed with lactic acid solution again, is emulsified, obtain film liquid；In the film liquid, the concentration of Extracted From Oil-tea-cake extract
It is 10~20wt%, the concentration of edible gelatin is 0.3~0.8wt%, and the concentration of lactic acid is 1~2wt%, the concentration of pulullan polysaccharide
It is 1~2wt%；
(4) by the film liquid homogeneous in step (3), refinement；It is degassed again, curtain coating, dry, take off film, obtain food fresh keeping membrane.
2. preparation method as claimed in claim 1, it is characterised in that in step (3), the concentration of the edible gelatin is
0.5wt%。
3. preparation method as claimed in claim 1, it is characterised in that in step (3), the concentration of the pulullan polysaccharide is
1.5wt%。
4. preparation method as claimed in claim 1, it is characterised in that in step (3), the concentration of the lactic acid is 1.5wt%.
5. preparation method as claimed in claim 1, it is characterised in that in step (4), the dry condition is：40~
30~50h is dried at 60 DEG C.
6. preparation method as claimed in claim 1, it is characterised in that in step (4), the number of times of the degassing is 5~8 times.
7. preparation method as claimed in claim 1, it is characterised in that in step (1), the volume of ethanol in the ethanol solution
Fraction is 60~80%.
8. preparation method as claimed in claim 1, it is characterised in that in step (1), carried out to Extracted From Oil-tea-cake with ethanol solution many
Secondary extraction, filtering, filtrate merges into extract solution.
9. preparation method as claimed in claim 1, it is characterised in that in step (3), time of the emulsification for 15~
30min。
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| CN112225824A (en) * | 2020-07-31 | 2021-01-15 | 韶关市友丰生态园林开发有限公司 | Extraction method and application of camellia oleifera meal polysaccharide |
| CN113930082A (en) * | 2021-10-20 | 2022-01-14 | 厦门子恒环保科技有限公司 | Environment-friendly paper tableware processing film-coated material and preparation method thereof |
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| CN102276679B (en) * | 2011-06-27 | 2013-03-13 | 中国林业科学研究院林产化学工业研究所 | Method for extracting high-purity tea saponin from oil-tea-cake by decompression boiling |
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