CN110804218A - Preparation method of edible film containing Sargassum horneri dietary fiber - Google Patents
Preparation method of edible film containing Sargassum horneri dietary fiber Download PDFInfo
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- CN110804218A CN110804218A CN201911187914.2A CN201911187914A CN110804218A CN 110804218 A CN110804218 A CN 110804218A CN 201911187914 A CN201911187914 A CN 201911187914A CN 110804218 A CN110804218 A CN 110804218A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L29/00—Foods or foodstuffs containing additives; Preparation or treatment thereof
- A23L29/20—Foods or foodstuffs containing additives; Preparation or treatment thereof containing gelling or thickening agents
- A23L29/206—Foods or foodstuffs containing additives; Preparation or treatment thereof containing gelling or thickening agents of vegetable origin
- A23L29/262—Cellulose; Derivatives thereof, e.g. ethers
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
- A23L33/20—Reducing nutritive value; Dietetic products with reduced nutritive value
- A23L33/21—Addition of substantially indigestible substances, e.g. dietary fibres
- A23L33/22—Comminuted fibrous parts of plants, e.g. bagasse or pulp
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2305/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2301/00 or C08J2303/00
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/05—Alcohols; Metal alcoholates
- C08K5/053—Polyhydroxylic alcohols
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- Life Sciences & Earth Sciences (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Nutrition Science (AREA)
- Food Science & Technology (AREA)
- Manufacturing & Machinery (AREA)
- Mycology (AREA)
- Botany (AREA)
- Materials Engineering (AREA)
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Abstract
The invention discloses a preparation method of a Sargassum horneri dietary fiber edible film, which comprises the following steps: pulverizing Sargassum horneri dietary fiber, adding ultrapure water for homogenizing, and heating to obtain Sargassum horneri dietary fiber solution; firstly, adding a thickening agent and glycerol into a Sargassum horneri dietary fiber solution, carrying out thermostatic water bath, adjusting the pH value, centrifuging, and carrying out vacuum degassing; coating the obtained solution on a substrate, drying, and standing to obtain the edible film containing Sargassum horneri dietary fiber. The film has high transparency, low oil permeability coefficient and low water vapor permeability coefficient; can improve physiological activity of intestinal health.
Description
Technical Field
The invention belongs to the field of food engineering. In particular to a preparation method of a Sargassum horneri dietary fiber edible film.
Background
Sargassum horneri is a health food rich in abundant nutrient substances such as polysaccharide, vitamins and protein. The Sargassum horneri contains polysaccharides, brown algae polyphenols, fucosterol, etc. with various physiological activities, and has effects of resisting oxidation, aging and tumor, and inhibiting cardiovascular and cerebrovascular diseases. The dietary fiber is a composite mixture of polymers, and is an important food nutrient required in the human digestive process. The research shows that the dietary fiber has the function of relaxing the bowels, can prevent and treat constipation and colon cancer, reduce the blood sugar and cholesterol of human bodies and treat diabetes. The Sargassum horneri dietary fiber not only has various physiological activities of Sargassum horneri, but also can effectively improve the intestinal health of human body by utilizing the water absorption and expansibility of the dietary fiber.
In recent years, the problem of environmental pollution caused by plastic packaging of food products has been increasing, and the development of new green and pollution-free edible packaging materials has become a great hotspot in the field of food packaging. Edible films have become the focus of research in various countries of the world due to their non-polluting, degradable, edible characteristics. The edible film is mainly a porous reticular structure film formed by using natural edible substances, such as polysaccharide, protein, lipid, fiber and derivatives thereof as raw materials and through the interaction between different molecules. The current research shows that the edible film is used for replacing a plastic film to effectively reduce the environmental pollution, so that the edible film made of the sargassum horneri dietary fibers is a green packaging material with development prospect.
At present, the raw materials of edible films are mainly natural edible substances such as polysaccharides, proteins, lipids, fibers and derivatives thereof. The edible film taking protein as a raw material has certain strength and barrier property, but because a large amount of plasticizer is added in the film forming process, the water permeability of the protein film is also reduced along with the addition of the plasticizer. The thickness and uniformity of the edible film taking the lipid as the raw material are difficult to control during film coating, waxy mouthfeel is easy to generate, and cracks and holes are easy to generate after the preparation is finished, so that the water resistance of the film is reduced.
The existing edible film taking dietary fiber as raw material mainly comprises soybean dietary fiber edible film and corn bran dietary fiber, and in the method, the following steps are required: sodium alginate 3:1 is used as a thickening agent, otherwise, the effect is poor; sodium alginate, however, tends to be in short supply due to its large use in industry.
At present, the preparation of edible films made of marine algae has not appeared.
Disclosure of Invention
The invention aims to provide a preparation method of an edible film made of sargassum horneri dietary fibers.
In order to solve the technical problem, the invention provides a preparation method of an edible film containing sargassum horneri dietary fibers, which comprises the following steps:
1) firstly, crushing the sargassum horneri dietary fiber, then adding ultrapure water according to the feed-liquid ratio of 1 g/10-30 ml for homogenization, and then heating at the temperature of 80 +/-10 ℃ for 2-3 minutes to obtain a sargassum horneri dietary fiber solution;
description of the drawings: the purpose of homogenizing is to uniformly mix the Sargassum horneri dietary fiber with water, and the purpose of heat treatment is to fully swell the Sargassum horneri dietary fiber;
2) adding a thickening agent into the Sargassum horneri dietary fiber solution obtained in the step 1), uniformly stirring, and then adding glycerol, and uniformly stirring;
the thickening agent accounts for 0.5-1.5% of the weight of the Sargassum horneri dietary fiber solution,
the glycerol accounts for 1-3% of the weight of the Sargassum horneri dietary fiber solution;
3) firstly, the solution obtained in the step 2) is put in a constant temperature water bath (20 +/-5) at the temperature of 75 +/-5 ℃) for min, and then the pH value is adjusted to 9.0 +/-0.5 (for example, 1mol/L NaOH solution can be used for adjustment);
4) centrifuging the liquid obtained in the step 3), and degassing the liquid obtained after centrifugation at 20-30 ℃ in vacuum (the vacuum degree is 0.08MPa) for 1-2 hours;
5) coating the solution obtained in the step 3) on a substrate until the thickness of the obtained wet film is (2 +/-0.2) mm;
description of the drawings: coating can be carried out, for example, with a wire bar coater;
6) and (3) drying the product obtained in the step (5) (namely the substrate and the wet film), standing, and removing the substrate (namely, uncovering the film) to obtain the edible film of the sargassum horneri dietary fiber.
The improvement of the preparation method of the edible film containing the sargassum horneri dietary fibers comprises the following steps: in the step 6), drying is carried out at 50 +/-5 ℃ for 2 +/-0.5 hours, and then standing is carried out for 1 +/-0.2 hours under the conditions of relative humidity (50 +/-5)%, and temperature (30 +/-5) ° C.
The preparation method of the edible film containing the sargassum horneri dietary fibers is further improved as follows:
the thickening agent in the step 2) is sodium carboxymethyl cellulose;
the centrifugation in the step 3) is as follows: centrifuging at 8000 + -800 rpm/min for 10 + -2 min;
homogenizing in the step 1) comprises the following steps: homogenizing at 60MPa for 3 times, each for 2 min;
the substrate in step 5) is a glass plate.
The preparation method of the edible film containing the sargassum horneri dietary fibers is further improved as follows:
in the step 1), the Sargassum horneri dietary fiber: ultrapure water of 1g/20 ml;
in the step 2), the thickening agent accounts for 1% of the weight of the Sargassum horneri dietary fiber solution; the glycerol accounts for 2% of the weight of the Sargassum horneri dietary fiber solution.
The invention relates to a Sargassum horneri dietary fiber edible film, which is an edible film synthesized by a series of steps of crushing Sargassum horneri dietary fiber, homogenizing, swelling, stirring, drying, degassing, standing, uncovering the film and the like and taking Sargassum horneri dietary fiber as a main raw material.
In the invention, sodium carboxymethylcellulose is selected as a thickening agent; the raw materials are easy to obtain, and the effect is good when the method is used in the process.
The edible film prepared by taking the Sargassum horneri dietary fibers as the main raw material not only can fully utilize ocean resources, but also can integrate the nutritional ingredients and physiological functions of the dietary fibers; providing nutrition for human body. It has high transparency, low oil permeability coefficient and low water vapor permeability coefficient; can improve physiological activity of intestinal health. The raw materials adopted by the invention are wide in source, the membrane material preparation method is simple, the operation is easy, the conditions are easy to achieve, and the method is green and environment-friendly and is suitable for industrial production.
The method for measuring the transparency, oil permeability coefficient and water vapor permeability coefficient of the edible film product is a conventional technique, and in the present invention, for example, the following methods can be used:
(1) transparency:
cutting the edible film to be measured into transverse strips according to the size of the cuvette, pasting the transverse strips on the surface of the cuvette, measuring the absorbance of the edible film under the condition of 540nm wavelength, converting the absorbance into light transmittance, expressing the transparency of the edible film by using the light transmittance, using a blank cuvette without any solution as a reference control, and calculating the light transmittance of the film by the following formula:
T(％)＝0.1A×100％
in the formula: t is the light transmittance (%) and A is the absorbance.
(2) Oil permeability coefficient
Putting 5mL of soybean oil into a test tube, sealing the test tube by using the prepared edible Sargassum horneri dietary fiber membrane, pouring the membrane on filter paper, weighing the weight change of the filter paper after standing for 2 days, and calculating the oil permeability coefficient of the membrane according to the following formula:
in the formula: p is the oil permeability coefficient (g.mm/m)2D); m is the filter paper weight change (g); l is the thickness of the film (mm); a is the area of the sealing film (m)2) (ii) a t is time (d).
(3) Water vapor transmission coefficient
Putting allochroic silica gel with a certain mass into a small beaker, sealing the beaker by using a Sargassum horneri edible dietary fiber membrane, standing the beaker for 24 hours in a constant-temperature constant-humidity incubator at the temperature of 30 ℃ and the relative humidity of 75%, and calculating the water vapor transmission coefficient of the edible dietary fiber membrane according to the following formula by measuring the weight of the allochroic silica gel:
in the formula: w is the water vapor transmission coefficient (g.mm/m)2d.kPa); m is the silica gel mass change (g); l is the thickness of the film (mm); a is the area of the sealing film (m)2) (ii) a t is time (d); Δ p is the pressure difference (kPa) between the upper and lower sides of the membrane.
Detailed Description
The invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto.
In the present invention, it is not specifically disclosed that the reaction is carried out at ordinary room temperature.
Example 1, a method for preparing an edible film of Sargassum horneri dietary fiber, sequentially comprising the following steps:
1) crushing the sargassum horneri dietary fibers, sieving the crushed sargassum horneri dietary fibers with a sieve of 80 meshes, adding ultrapure water according to the feed liquid ratio of 1g/10ml, uniformly mixing, homogenizing for 3 times at 60MPa in a homogenizer for 2min each time, uniformly mixing the sargassum horneri dietary fibers with water, heating at 80 ℃ for 2-3 min, and fully swelling the sargassum horneri dietary fibers to obtain the sargassum horneri dietary fiber solution.
2) Adding sodium hydroxymethyl cellulose as a thickening agent into the Sargassum horneri dietary fiber solution obtained in the step 1), uniformly stirring, and then adding glycerol, and uniformly stirring;
the thickening agent accounts for 0.5 percent of the weight of the Sargassum horneri dietary fiber solution,
the glycerol accounts for 1 percent of the mass of the Sargassum horneri dietary fiber solution;
3) putting the solution obtained in the step 2) in a thermostatic water bath at 75 ℃ for 20min, and then adjusting the pH value to 9.0 (the pH value can be adjusted by using 1mol/L NaOH solution);
4) centrifuging the liquid obtained in the step 3) (8000rpm/min, centrifuging for 10min), and degassing the liquid obtained after centrifugation in a drying box with the vacuum degree of 0.08MPa and the temperature of 25 ℃ for 2 h;
5) coating the solution obtained after degassing in the step 3) on a glass plate serving as a substrate by using a film coating machine, namely slowly coating a layer of uniform film solution on the glass plate by using a wire rod type film coating machine, and controlling the thickness of a wet film to be about 2 mm;
6) and (3) drying the substance obtained in the step 5) (namely the substrate and the wet film) in an oven at 50 ℃ for 2 hours, and standing for 1 hour under the conditions of relative humidity of 50% and temperature of 30 ℃.
And removing the substrate (namely, uncovering the film) to obtain the edible film of the sargassum horneri dietary fibers.
The edible film of Sargassum horneri dietary fiber has transparency of 10.61% and oil permeability coefficient of 3.98 g.mm/m2D, a water vapor transmission coefficient of 0.50 g.mm/m2·d·kPa。
Example 2, a method for preparing an edible film of sargassum horneri dietary fiber, which is modified relative to example 1 as follows:
step 1), the material-liquid ratio is 1g/20 ml;
step 2), the thickening agent accounts for 1% of the weight of the Sargassum horneri dietary fiber solution, and the glycerol accounts for 2% of the weight of the Sargassum horneri dietary fiber solution;
the rest is equivalent to embodiment 1.
The edible film of Sargassum horneri dietary fiber has transparency of 12.34% and oil permeability coefficient of 4.02 g.mm/m2D, a water vapor transmission coefficient of 0.52 g.mm/m2·d·kPa。
Example 3, a method for preparing an edible film of sargassum horneri dietary fiber, which is modified relative to example 1 as follows:
step 1), the material-liquid ratio is 1g/30 ml;
step 2), the thickening agent accounts for 1.5% of the weight of the Sargassum horneri dietary fiber solution, and the glycerol accounts for 3% of the weight of the Sargassum horneri dietary fiber solution;
the rest is equivalent to embodiment 1.
The edible film of Sargassum horneri dietary fiber has transparency of 15.61% and oil permeability coefficient of 4.67 g.mm/m2D, a water vapor transmission coefficient of 0.55 g.mm/m2·d·kPa。
Comparative example 1: the sargassum horneri dietary fibers in the example 2 are replaced by sargassum horneri polysaccharide, the using amount is kept unchanged, and the rest is equal to the example 2;
the Sargassum horneri polysaccharide edible film has transparency of 8.12% and oil permeability coefficient of 4.25 g.mm/m2D, a water vapor transmission coefficient of 0.54 g.mm/m2·d·kPa。
Comparative example 2: the thickener in example 2 was changed from sodium carboxymethylcellulose to methylcellulose in an amount that remained the same as in example 2.
The edible film of Sargassum horneri dietary fiber has transparency of 9.66% and oil permeability coefficient of 4.37 g.mm/m2D, a water vapor transmission coefficient of 0.57 g.mm/m2·d·kPa。
Comparative example 3: the use of glycerol in example 2 was eliminated, i.e., the amount of glycerol used was 0, and the remainder was identical to example 2.
The edible film of Sargassum horneri dietary fiber has transparency of 7.64% and oil permeability coefficient of 5.44 g.mm/m2D, a water vapor transmission coefficient of 0.53 g.mm/m2·d·kPa。
Comparative examples 1 to 3, compared to example 2, are inferior in transparency to example 2, and are relatively high in oil permeability and water vapor permeability, so that the edible film prepared is inferior in overall properties to example 2.
Finally, it is also noted that the above-mentioned lists merely illustrate a few specific embodiments of the invention. It is obvious that the invention is not limited to the above embodiments, but that many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.
Claims (7)
1. The preparation method of the edible film containing the sargassum horneri dietary fibers is characterized by comprising the following steps:
1) firstly, crushing the sargassum horneri dietary fiber, then adding ultrapure water according to the feed-liquid ratio of 1 g/10-30 ml for homogenization, and then heating at the temperature of 80 +/-10 ℃ for 2-3 minutes to obtain a sargassum horneri dietary fiber solution;
2) adding a thickening agent into the Sargassum horneri dietary fiber solution obtained in the step 1), uniformly stirring, and then adding glycerol, and uniformly stirring;
the thickening agent accounts for 0.5-1.5% of the weight of the Sargassum horneri dietary fiber solution,
the glycerol accounts for 1-3% of the weight of the Sargassum horneri dietary fiber solution;
3) firstly, putting the solution obtained in the step 2) in a constant-temperature water bath (20 +/-5) at the temperature of 75 +/-5 ℃) for min, and then adjusting the pH value to 9.0 +/-0.5;
4) centrifuging the liquid obtained in the step 3), and performing vacuum degassing on the centrifuged liquid at 20-30 ℃ for 1-2 hours;
5) coating the solution obtained in the step 3) on a substrate until the thickness of the obtained wet film is (2 +/-0.2) mm;
6) and drying the product obtained in the step 5), standing, and removing the substrate to obtain the edible film of the sargassum horneri dietary fiber.
2. The method for preparing edible film of Sargassum horneri dietary fiber according to claim 1, wherein: in the step 6), drying is carried out at 50 +/-5 ℃ for 2 +/-0.5 hours, and then standing is carried out for 1 +/-0.2 hours under the conditions of relative humidity (50 +/-5)%, and temperature (30 +/-5) ° C.
3. The method for preparing edible film of Sargassum horneri dietary fiber according to claim 2, wherein: the thickening agent in the step 2) is sodium carboxymethyl cellulose.
4. The method for preparing the edible film containing the Sargassum horneri dietary fibers according to any one of claims 1 to 3, wherein: the centrifugation in the step 3) is as follows: centrifuging at 8000 + -800 rpm/min for 10 + -2 min.
5. The method for preparing the edible film containing the Sargassum horneri dietary fibers according to any one of claims 1 to 3, wherein: the homogenization in the step 1) comprises the following steps: homogenizing at 60MPa for 3 times, each for 2 min.
6. The method for preparing the edible film containing the Sargassum horneri dietary fibers according to any one of claims 1 to 3, wherein: the substrate in the step 5) is a glass plate.
7. The method for preparing the edible film containing the Sargassum horneri dietary fibers according to any one of claims 1 to 3, wherein:
in the step 1), the content of the Sargassum horneri dietary fiber: ultrapure water of 1g/20 ml;
in the step 2), the thickening agent accounts for 1% of the weight of the Sargassum horneri dietary fiber solution; the glycerol accounts for 2% of the weight of the Sargassum horneri dietary fiber solution.
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| EP4014759A1 (en) * | 2020-12-18 | 2022-06-22 | VIRAofSWEDEN AB | Novel product comprising brown alga extract |
| CN115581246A (en) * | 2022-10-09 | 2023-01-10 | 汪欣 | Vegetable cake and preparation method thereof |
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