CN106519708A - Preparation method of gelatin film containing methylcellulose and glycerin - Google Patents
Preparation method of gelatin film containing methylcellulose and glycerin Download PDFInfo
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- CN106519708A CN106519708A CN201611096654.4A CN201611096654A CN106519708A CN 106519708 A CN106519708 A CN 106519708A CN 201611096654 A CN201611096654 A CN 201611096654A CN 106519708 A CN106519708 A CN 106519708A
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- methylcellulose
- glycerol
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/46—Applications of disintegrable, dissolvable or edible materials
- B65D65/463—Edible packaging materials
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L89/00—Compositions of proteins; Compositions of derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L89/00—Compositions of proteins; Compositions of derivatives thereof
- C08L89/005—Casein
-
- 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
- C08J2389/00—Characterised by the use of proteins; Derivatives thereof
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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
- C08J2401/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2401/08—Cellulose derivatives
- C08J2401/26—Cellulose ethers
- C08J2401/28—Alkyl ethers
-
- 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
- C08J2489/00—Characterised by the use of proteins; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The invention relates to a preparation method of a gelatin film containing methylcellulose and glycerin and belongs to the field of material preparation. The preparation method is characterized by comprising steps as follows: (1) gelatin absorbs water in deionized water and is subjected to water bath heating, and a gelatin solution is prepared; sodium caseinate is stirred in deionized water and subjected to a water bath after being completely dissolved, and a protein mixed solution is prepared; (2) methylcellulose is added to the deionized water and subjected to a water bath until the solution is colorless and transparent; (3) the protein mixed solution and the methylcellulose solution are mixed, glycerin is added to serve as a plasticizer, and a film forming solution is prepared; (4) the film forming solution is dried in a constant-temperature air drying oven to form the film. The tensile strength of the composite film can be improved and the flexibility of the composite film can be enhanced due to addition of methylcellulose; the tensile strength of the film is reduced and the elongation is increased due to addition of glycerin.
Description
Technical field
The invention belongs to field of material preparation, more particularly to a kind of gelatin film preparation side containing methylcellulose and glycerol
Method.
Background technology
Edible film is the plasticising for adding edibility with biomacromolecules such as polysaccharide, protein, lipids as film forming matrix
The materials such as agent, reinforcing agent, the thin film prepared by crosslinked action.The mechanism of action of edible film is by preventing moisture, gas
, there is the change of local flavor and quality in storage and transportation to avoid food, so that it is guaranteed that food in the migration of body and solute etc.
Quality, extends the shelf life of food as far as possible.Edible packing material can be degradable because of which, and barrier property is good, with one
The advantages of fixed nutritive value, safety and sanitation, become the focus of domestic and international research.
Methylcellulose（MC）For white or off-white color threadiness or particulate powder；Odorless, it is tasteless；Dehydrated alcohol,
It is almost insoluble in ether, acetone, in 80～90 DEG C of hot water rapidly dispersion, it is swelling, dissolved after cooling rapidly, aqueous solution
Quite stable at normal temperatures, during high temperature can gel, and this gel can be with the mutual phase in version of the height of temperature and solution;With excellent
Wettability, dispersibility, cementability, thickening property, emulsibility, water-retaining property and film property, and the impermeability to oils and fatss.
The content of the invention
Present invention seek to address that the problems referred to above, there is provided a kind of gelatin membrane preparation method containing methylcellulose and glycerol.
The technical scheme is that：
A kind of gelatin membrane preparation method containing methylcellulose and glycerol, it is characterised in that comprise the steps：
（1）By 5g gelatin in 100g deionized water at normal temperature imbibition 1h, 45-55 DEG C of heating in water bath 30min, be obtained gelatin it is molten
Liquid, is cooled to room temperature standby；8g sodium caseinates stir 2h respectively in 100g deionized water at normal temperature, after being completely dissolved, 85 DEG C
Water-bath 30min, makes protein denaturation, cools down standby；Gelatin solution and na caseinate solution are with 1:1 volume ratio mixes, homogeneous,
It is prepared into protein mixed solution；
（2）The methylcellulose of 0-3g is added in 100g deionized water at normal temperature, the water-bath 1h under the conditions of 70 DEG C stands cold going
24h, to water white transparency；
（3）Protein mixed solution and methocel solution are with 5:1 mass ratio mixing, and add glycerol as plasticizer,
Stirring 1h so as to be sufficiently mixed, is obtained film forming solution；
（4）Film forming solution down on film forming plastic board, is dried in 45-55 DEG C of constant temperature blast drying oven Jing after vacuum pump discharges
Film.
Gelatin membrane preparation method containing methylcellulose and glycerol of the present invention, the viscosity of the methylcellulose
For 20g/L, 20 DEG C.
Gelatin membrane preparation method containing methylcellulose and glycerol of the present invention, the methylcellulose is by fibre
The made modified cellulose of dimension element and NaOH-CH3Cl reactions.
Gelatin membrane preparation method containing methylcellulose and glycerol of the present invention, the addition of the methylcellulose
Measure as 2.5%, glycerol addition is 14%, the tensile strength of composite membrane is maximum, is 11.44 MPa.
Gelatin membrane preparation method containing methylcellulose and glycerol of the present invention, the addition of the methylcellulose
Measure as 2.0%, glycerol addition is 22%, and composite membrane has the percentage elongation 60.76% of maximum.
The method have technical effect that：
Gelatin membrane preparation method containing methylcellulose and glycerol of the present invention, the addition of methylcellulose can improve multiple
The tensile strength of film is closed, strengthens its pliability；The addition of glycerol reduces the tensile strength of film, and percentage elongation is improved.
Specific embodiment
Embodiment 1
A kind of gelatin membrane preparation method containing methylcellulose and glycerol, it is characterised in that comprise the steps：
（1）By 5g gelatin in 100g deionized water at normal temperature imbibition 1h, 45 DEG C of heating in water bath 30min, be obtained gelatin solution,
It is cooled to room temperature standby；8g sodium caseinates stir 2h respectively in 100g deionized water at normal temperature, after being completely dissolved, 85 DEG C of water-baths
30min, makes protein denaturation, cools down standby；Gelatin solution and na caseinate solution are with 1:1 volume ratio mixes, homogeneous, prepares
Into protein mixed solution；
（2）The methylcellulose of 1g is added in 100g deionized water at normal temperature, the water-bath 1h under the conditions of 70 DEG C, standing is cold to remove 24h,
To water white transparency；
（3）Protein mixed solution and methocel solution are with 5:1 mass ratio mixing, and add glycerol as plasticizer,
Stirring 1h so as to be sufficiently mixed, is obtained film forming solution；
（4）Film forming solution down on film forming plastic board, dries film forming in 45 DEG C of constant temperature blast drying ovens Jing after vacuum pump discharges.
Gelatin membrane preparation method containing methylcellulose and glycerol of the present invention, the viscosity of the methylcellulose
For 20g/L, 20 DEG C.
Gelatin membrane preparation method containing methylcellulose and glycerol of the present invention, the methylcellulose is by fibre
The made modified cellulose of dimension element and NaOH-CH3Cl reactions.
Gelatin membrane preparation method containing methylcellulose and glycerol of the present invention, the addition of the methylcellulose
Measure as 2.5%, glycerol addition is 14%, the tensile strength of composite membrane is maximum, is 11.44 MPa.
Film to be measured is uniformly cut into into 15mm*120mm（Wide * length）Strip it is stand-by, notice that cut edge must not split
Trace, in order to avoid affect measurement result.The strip of cutting is longitudinally disposed on the shelf of computer observing and controlling anti-tensile machine above-below direction, setting folder
Away from for 50mm, speed is 300mm/min, and parallel assay eight times is averaged.Percentage elongation is directly read on machine.Film to be measured
The circle of a diameter of 50mm is cut into, WGT-S light transmittances/mist degree is placed in and is estimated between the magnetic clamp of instrument, determine the printing opacity of film
Rate and mist degree, every film are determined 5 times, go meansigma methodss.During measure, it is to avoid directly receive survey film with handss, in order to avoid leaving impression of the hand, affect
Measurement result.
Methylcellulose addition and glycerol adding proportion have one to be fixed to the tensile strength of gelatin-sodium caseinate film
Ring.The timing of glycerol addition one, with the increase of Methyl cellulose cellulose content, the tensile strength of film show as first dramatically increasing after slightly
Edge down low trend.As a example by when glycerol addition is 14%, when methylcellulose addition is 2.5%, the tensile strength of film
Maximum, is 11.44MPa, and compared to matched group, tensile strength increased 16.9%.Reason is
The hydroxyl remained on methylcellulose can occur strong hydrogen bond action with the hydroxyl of protein structure or amino, be molecule
Intermolecular forces strengthen, and the space structure of film is even closer, and intensity is bigger, shows as the increase of tensile strength.But methylcellulose
Addition be 3% when, tensile strength reduces 1.9%, and reason may be the methylcellulose when Methyl cellulose cellulose content increases
Intermolecular generation agglomeration, causes macromole to be evenly distributed, reduces cross-link intensity.When methylcellulose addition it is certain
When, the raising of glycerol addition reduces the tensile strength of film, and it is hydrophilic small molecules that reason is glycerol molecule, can enter mutual
Between the macromolecular structure of winding, the compactness of film is reduced, so that the tensile strength of film is reduced.When methylcellulose addition is
When 2.5%, glycerol addition increases to 22% from 14% causes tensile strength to reduce by 36.97%.
Methyl cellulose cellulose content from 0% increase to 2% when, the percentage elongation of gelatin-sodium caseinate film increases therewith, with 22%
Glycerol addition as a example by, Methyl cellulose cellulose content increases to 2% from 0% makes percentage elongation increased 18.3%.The reason for increase is methyl
Cellulosic molecule sheet is mutually wound with Harmonic Protein Molecular Chains as linear long chain structure, increased mobility, so as to improve film
Percentage elongation.When methyl cellulose concentration is too high, because of the agglomeration and film internal structure rigidity of methylcellulose molecule
Enhancing, cause percentage elongation to reduce.When methylcellulose addition is fixed, the increase of glycerol concentration can improve the percentage elongation of film,
Reason be glycerol as plasticizer, by weakening the intermolecular active force of adjacent polymer chains, can increase film extensibility and
Flexibility, reduces some barrier properties of mechanical resistance and film.
Light transmittance is reduced with the increase of methylcellulose addition, and when glycerol addition is 14%, methylcellulose contains
Amount increases to 3% from 0% causes the light transmittance of film to reduce 1.9%.Reason may strengthen for intermolecular interaction, internal structure
Even closer, the permeability of film declines, so as to light transmittance is reduced.The increase of glycerol content is affected not on the light transmittance of film significantly,
Each group is more or less the same.The mist degree of film significantly increases with the increase of Methyl cellulose cellulose content, when addition is 3%, film
Mist degree improves 8.36 times relative to blank group.
Embodiment 2
A kind of gelatin membrane preparation method containing methylcellulose and glycerol, it is characterised in that comprise the steps：
（1）By 5g gelatin in 100g deionized water at normal temperature imbibition 1h, 55 DEG C of heating in water bath 30min, be obtained gelatin solution,
It is cooled to room temperature standby；8g sodium caseinates stir 2h respectively in 100g deionized water at normal temperature, after being completely dissolved, 85 DEG C of water-baths
30min, makes protein denaturation, cools down standby；Gelatin solution and na caseinate solution are with 1:1 volume ratio mixes, homogeneous, prepares
Into protein mixed solution；
（2）The methylcellulose of 3g is added in 100g deionized water at normal temperature, the water-bath 1h under the conditions of 70 DEG C, standing is cold to remove 24h,
To water white transparency；
（3）Protein mixed solution and methocel solution are with 5:1 mass ratio mixing, and add glycerol as plasticizer,
Stirring 1h so as to be sufficiently mixed, is obtained film forming solution；
（4）Film forming solution down on film forming plastic board, dries film forming in 55 DEG C of constant temperature blast drying ovens Jing after vacuum pump discharges.
Gelatin membrane preparation method containing methylcellulose and glycerol of the present invention, the viscosity of the methylcellulose
For 20g/L, 20 DEG C.
Gelatin membrane preparation method containing methylcellulose and glycerol of the present invention, the methylcellulose is by fibre
The made modified cellulose of dimension element and NaOH-CH3Cl reactions.
Gelatin membrane preparation method containing methylcellulose and glycerol of the present invention, the addition of the methylcellulose
Measure as 2.0%, glycerol addition is 22%, and composite membrane has the percentage elongation 60.76% of maximum.
The addition of methylcellulose can reduce the hydroscopicity of film, and addition is bigger, and effect is more notable.Methylcellulose adds
When dosage is 3%, the hydroscopicity of film reduces 50% or so relative to matched group.When Methyl cellulose cellulose content is fixed, glycerol addition
The increase of amount can improve the hydroscopicity of film.When Methyl cellulose cellulose content is 3%, glycerol addition is that the hydroscopicity of 22% film is relative
79.0% and 14.4% is improve in the film that glycerol addition is 14%, 18%.Protein, methylcellulose are hydrophilic big point
Son, contains great amount of hydroxy group, therefore composite membrane has certain hygroscopicity on strand.Last point of hydroxyl of methylcellulose is by methyl
Replaced, hydroxyl quantity is reduced, hydrophobic group increases, therefore reduces the moisture absorption degree of composite membrane.Also, methylcellulose
There is hydrogen bond action with the hydroxyl of protein in a part of hydroxyl, can also reduce the wettability power of film.The increase of glycerol addition can
The wettability power of film is significantly improved, it is hydrophilic small molecules that reason is glycerol, the structure interchain of film can be entered, destruction hydrogen bond is made
With discharging part of hydroxyl, improve water absorbing capacity, and glycerol itself is also hydrophilic molecule, can also improve wettability power.
The addition of methylcellulose can reduce the oxygen transmission rate of film, improve gas barrier properties, and the addition of methylcellulose is got over
Greatly, effect is more notable.When glycerol addition is 14%, Methyl cellulose cellulose content increases to 3%, correspondingly, protein molecule from 0%
Strong hydrogen bond action intermolecular with methylcellulose, makes the structure of composite membrane finer and close, and gas molecule is difficult to pass through, therefore carries
High choke ability.The increase of glycerol content increases can the oxygen transmission rate of film, and when Methyl cellulose cellulose content is 3%, glycerol content is
The oxygen transmission rate of 14% composite membrane is 8.437.
With the increase of methylcellulose addition, the vapor transmission coefficient of composite membrane is first significantly reduced and is increased afterwards.With
As a example by glycerol addition is 14% film, Methyl cellulose cellulose content increases to 2.5% from 0%, and protein is intermolecular with methylcellulose
Strong hydrogen bond action, makes molecule interchain linkage even closer, and the structure of film is finer and close, and hydrone is difficult to pass through, and hinders moist
Can strengthen.When methylcellulose addition is 3%, vapor transmission coefficient somewhat rises, and this is possibly due to methylcellulose and contains
Amount increases, the intermolecular mutual winding of methylcellulose, agglomeration occurs, is that the internal structure of film is uneven, and hydrone is more easy to
Through.When Methyl cellulose cellulose content is certain, the increase of glycerol addition increases the vapor coefficient of film, and moisture barrier property declines,
This is relevant with glycerol molecule destruction inside configuration part hydrogen bond action.
Claims (5)
1. a kind of gelatin membrane preparation method containing methylcellulose and glycerol, it is characterised in that comprise the steps：
（1）By 5g gelatin in 100g deionized water at normal temperature imbibition 1h, 45-55 DEG C of heating in water bath 30min, be obtained gelatin it is molten
Liquid, is cooled to room temperature standby；8g sodium caseinates stir 2h respectively in 100g deionized water at normal temperature, after being completely dissolved, 85 DEG C
Water-bath 30min, makes protein denaturation, cools down standby；Gelatin solution and na caseinate solution are with 1:1 volume ratio mixes, homogeneous,
It is prepared into protein mixed solution；
（2）The methylcellulose of 0-3g is added in 100g deionized water at normal temperature, the water-bath 1h under the conditions of 70 DEG C stands cold going
24h, to water white transparency；
（3）Protein mixed solution and methocel solution are with 5:1 mass ratio mixing, and add glycerol as plasticizer,
Stirring 1h so as to be sufficiently mixed, is obtained film forming solution；
（4）Film forming solution down on film forming plastic board, is dried in 45-55 DEG C of constant temperature blast drying oven Jing after vacuum pump discharges
Film.
2. the gelatin membrane preparation method containing methylcellulose and glycerol according to claim 1, it is characterised in that：It is described
The viscosity of methylcellulose be 20g/L, 20 DEG C.
3. the gelatin membrane preparation method containing methylcellulose and glycerol according to claim 1 and 2, it is characterised in that：
The methylcellulose is by cellulose and NaOH-CH3The made modified cellulose of Cl reactions.
4. the gelatin membrane preparation method containing methylcellulose and glycerol according to claim 1 and 2, it is characterised in that：
The addition of the methylcellulose is 2.5%, and glycerol addition is 14%.
5. the gelatin membrane preparation method containing methylcellulose and glycerol according to claim 1 and 2, it is characterised in that：
The addition of the methylcellulose is 2.0%, and glycerol addition is 22%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611096654.4A CN106519708A (en) | 2016-12-02 | 2016-12-02 | Preparation method of gelatin film containing methylcellulose and glycerin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611096654.4A CN106519708A (en) | 2016-12-02 | 2016-12-02 | Preparation method of gelatin film containing methylcellulose and glycerin |
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| Publication Number | Publication Date |
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| CN106519708A true CN106519708A (en) | 2017-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611096654.4A Pending CN106519708A (en) | 2016-12-02 | 2016-12-02 | Preparation method of gelatin film containing methylcellulose and glycerin |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108727836A (en) * | 2018-06-11 | 2018-11-02 | 海南大学 | A kind of preparation method with the edible biogelatin film for being sustained EGCG performances |
| CN110878172A (en) * | 2018-09-05 | 2020-03-13 | 周维 | Edible gelatin sodium caseinate film and preparation method thereof |
| CN115136975A (en) * | 2022-07-06 | 2022-10-04 | 山东海奥斯生物科技股份有限公司 | Method for improving light transmittance of collagen casing |
-
2016
- 2016-12-02 CN CN201611096654.4A patent/CN106519708A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108727836A (en) * | 2018-06-11 | 2018-11-02 | 海南大学 | A kind of preparation method with the edible biogelatin film for being sustained EGCG performances |
| CN110878172A (en) * | 2018-09-05 | 2020-03-13 | 周维 | Edible gelatin sodium caseinate film and preparation method thereof |
| CN115136975A (en) * | 2022-07-06 | 2022-10-04 | 山东海奥斯生物科技股份有限公司 | Method for improving light transmittance of collagen casing |
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Application publication date: 20170322 |