CN109651633A - The preparation method of the modified composite membrane of sodium alginate-pectin - Google Patents
The preparation method of the modified composite membrane of sodium alginate-pectin Download PDFInfo
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- CN109651633A CN109651633A CN201811523350.0A CN201811523350A CN109651633A CN 109651633 A CN109651633 A CN 109651633A CN 201811523350 A CN201811523350 A CN 201811523350A CN 109651633 A CN109651633 A CN 109651633A
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- Prior art keywords
- sodium alginate
- pectin
- composite membrane
- preparation
- solution
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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
-
- 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
- C08J2305/06—Pectin; Derivatives thereof
-
- 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
- C08J2405/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2401/00 or C08J2403/00
- C08J2405/04—Alginic acid; Derivatives thereof
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Jellies, Jams, And Syrups (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
The present invention discloses a kind of preparation method of modified composite membrane of sodium alginate-pectin, comprising the following steps: (1) prepares pectin solution；(2) sodium alginate soln is prepared；(3) sodium alginate-pectin composite membrane preparation: pectin solution, sodium alginate soln are mixed, it is ultrasonically treated 10-15min, then it homogenizes 3 times, 6-10h is stood at 40-45 DEG C, casting film-forming on a glass, dry 1-2h is dried at 80-90 DEG C, sodium alginate-pectin composite membrane is prepared in removing；(4) it is crosslinked: sodium alginate-pectin composite membrane is immersed in 2-4min in calcium chloride solution, after taking-up, vacuum drying.Film prepared by the present invention can be used for food packaging applications, barrier property and good mechanical property, and elongation at break 8-10%, water repelling property is good, and it is a kind of green food packaging material that light transmittance, which can reach 80-90%,.
Description
Technical field
The invention belongs to field of material technology, and in particular to a kind of preparation method of the modified composite membrane of sodium alginate-pectin.
Background technique
As food packaging causes the serious consumption problem of environmental pollution, the energy and people to the weight of food packaging safety
Depending on the degradable package material based on natural macromolecular material is increasingly becoming the hot spot of research in recent years.Natural polymer
Material is with edible natural substance such as polysaccharide, protein, cellulose etc. for raw material, has good degradability, gas permeability, peace
The features such as full property.Film dynamic performance, the moisture barrier property of the natural macromolecular material preparation of one-component are poor, and natural polysaccharide is high
Molecular material contains great amount of hydroxy group and other polar groups mostly, and hydrophily is strong, water repelling property is poor, these deficiencies limit its conduct
Membrane material in the practical application in various fields, to make its for commercial applications must also from the water resistance of film, hinder moist, mechanical strength
Etc. into~step improve.Blending and modifying, which is combined into packaging material for food using a variety of substrates, makes its mutual supplement with each other's advantages, is to improve day
The simple and effective approach of right high molecular material performance, while Applied Physics, the processing technology of chemical modification are also to improve film items
The important means of performance.
Sodium alginate (SA) is a kind of natural macromolecule amylose, and the hydrosol has high viscosity and good film-forming property, and film is transparent
It is tough and tensile, at low cost, large-scale production is industrially formed, therefore be commonly used to do the substrate of packaging film.It is made using SA of raw material
Fresh-keeping film carbon dioxide transmission rate high oxygen transmitance it is low, can effectively extend the preservation time of food.But SA system
At thin flexible film it is inadequate, hinder it and further expand the application range as fresh-keeping film.Pectin (PEC) is a kind of line
Property flexible macromolecule, linear structure can assign film have the characteristics that it is soft and tough and tensile, pectin film have antibiotic property and degradability, mesh
Preceding pectin applies the research in packaging film less.Now, research prepares packaging film for sodium alginate and pectin are compound, but film
Poor mechanical property.
Summary of the invention
In view of the drawbacks of the prior art, the present invention provides a kind of preparation method of modified composite membrane of sodium alginate-pectin.
The preparation method of the modified composite membrane of sodium alginate-pectin, comprising the following steps:
(1) it prepares pectin solution: pectin being added to the water according to mass ratio 1:(50-60), is stirred under the revolving speed of 1000rpm
30-40min is then allowed to stand deaeration 4-6h, pectin solution is prepared；
(2) it prepares sodium alginate soln: being added to the water sodium alginate according to mass ratio 1:(45-55), in the revolving speed of 1000rpm
Lower stirring 35-45min, is then allowed to stand deaeration 4-6h, sodium alginate soln is prepared；
(3) sodium alginate-pectin composite membrane preparation: pectin solution, sodium alginate soln are mixed, 10- is ultrasonically treated
Then 15min homogenizes 3 times, 6-10h is stood at 40-45 DEG C, on a glass casting film-forming, dry at 80-90 DEG C dry
Dry 1-2h, removing, is prepared sodium alginate-pectin composite membrane；
(4) it is crosslinked: sodium alginate-pectin composite membrane is immersed in 2-4min in calcium chloride solution, after taking-up, vacuum drying, i.e.,
It can.
Preferably, pectin solution described in step (3), sodium alginate soln mass ratio be (2-3): 1.
Preferably, the condition of the ultrasonic treatment are as follows: ultrasonic power 500W, supersonic frequency 35-45KHz.
Preferably, the pressure to homogenize is 30MPa.
Preferably, the mass concentration of the calcium chloride solution is 1-3%.
Preferably, the vacuum drying condition are as follows: 35-45 DEG C of temperature, time 1-2h.
Advantages of the present invention:
Film prepared by the present invention, can be used for food packaging applications, barrier property and good mechanical property, elongation at break 8-10%,
Water repelling property is good, and it is a kind of green food packaging material that light transmittance, which can reach 80-90%,.
Specific embodiment
Embodiment 1
The preparation method of the modified composite membrane of sodium alginate-pectin, comprising the following steps:
(1) it prepares pectin solution: pectin being added to the water according to mass ratio 1:50, stirs 30min under the revolving speed of 1000rpm,
It is then allowed to stand deaeration 4h, pectin solution is prepared；
(2) it prepares sodium alginate soln: sodium alginate being added to the water according to mass ratio 1:45, is stirred under the revolving speed of 1000rpm
35min is mixed, deaeration 4h is then allowed to stand, sodium alginate soln is prepared；
(3) sodium alginate-pectin composite membrane preparation: being 2:1 according to the mass ratio of pectin solution, sodium alginate soln, by fruit
Sol solution, sodium alginate soln mixing, are ultrasonically treated 10min under conditions of ultrasonic power 500W, supersonic frequency 35KHz, so
It homogenizes under the pressure of 30MPa afterwards 3 times, 10h is stood at 40 DEG C, on a glass casting film-forming, dried at 80 DEG C dry
Dry 2h, removing, is prepared sodium alginate-pectin composite membrane；
(4) it is crosslinked: sodium alginate-pectin composite membrane is immersed in 4min in the calcium chloride solution that mass concentration is 1%, after taking-up,
2h is dried in vacuo at 35 DEG C.
Embodiment 2
The preparation method of the modified composite membrane of sodium alginate-pectin, comprising the following steps:
(1) it prepares pectin solution: pectin being added to the water according to mass ratio 1:60, stirs 40min under the revolving speed of 1000rpm,
It is then allowed to stand deaeration 6h, pectin solution is prepared；
(2) it prepares sodium alginate soln: sodium alginate being added to the water according to mass ratio 1:55, is stirred under the revolving speed of 1000rpm
45min is mixed, deaeration 6h is then allowed to stand, sodium alginate soln is prepared；
(3) sodium alginate-pectin composite membrane preparation: being 3:1 according to the mass ratio of pectin solution, sodium alginate soln, by fruit
Sol solution, sodium alginate soln mixing, are ultrasonically treated 15min under conditions of ultrasonic power 500W, supersonic frequency 45KHz, so
It homogenizes under the pressure of 30MPa afterwards 3 times, 6h is stood at 45 DEG C, on a glass casting film-forming, dry drying at 90 DEG C
1h, removing, is prepared sodium alginate-pectin composite membrane；
(4) it is crosslinked: sodium alginate-pectin composite membrane is immersed in 2min in the calcium chloride solution that mass concentration is 3%, after taking-up,
1h is dried in vacuo at 45 DEG C.
Embodiment 3
The preparation method of the modified composite membrane of sodium alginate-pectin, comprising the following steps:
(1) it prepares pectin solution: pectin being added to the water according to mass ratio 1:55, stirs 35min under the revolving speed of 1000rpm,
It is then allowed to stand deaeration 5h, pectin solution is prepared；
(2) it prepares sodium alginate soln: sodium alginate being added to the water according to mass ratio 1:50, is stirred under the revolving speed of 1000rpm
40min is mixed, deaeration 5h is then allowed to stand, sodium alginate soln is prepared；
(3) sodium alginate-pectin composite membrane preparation: being 2:1 according to the mass ratio of pectin solution, sodium alginate soln, by fruit
Sol solution, sodium alginate soln mixing, are ultrasonically treated 12min under conditions of ultrasonic power 500W, supersonic frequency 40KHz, so
It homogenizes under the pressure of 30MPa afterwards 3 times, 8h is stood at 42 DEG C, on a glass casting film-forming, dry drying at 85 DEG C
1.5h, removing, is prepared sodium alginate-pectin composite membrane；
(4) it is crosslinked: sodium alginate-pectin composite membrane is immersed in 3min in the calcium chloride solution that mass concentration is 2%, after taking-up,
1.5h is dried in vacuo at 40 DEG C.
Claims (6)
1. the preparation method of the modified composite membrane of sodium alginate-pectin, it is characterised in that: the following steps are included:
(1) it prepares pectin solution: pectin being added to the water according to mass ratio 1:(50-60), is stirred under the revolving speed of 1000rpm
30-40min is then allowed to stand deaeration 4-6h, pectin solution is prepared；
(2) it prepares sodium alginate soln: being added to the water sodium alginate according to mass ratio 1:(45-55), in the revolving speed of 1000rpm
Lower stirring 35-45min, is then allowed to stand deaeration 4-6h, sodium alginate soln is prepared；
(3) sodium alginate-pectin composite membrane preparation: pectin solution, sodium alginate soln are mixed, 10- is ultrasonically treated
Then 15min homogenizes 3 times, 6-10h is stood at 40-45 DEG C, on a glass casting film-forming, dry at 80-90 DEG C dry
Dry 1-2h, removing, is prepared sodium alginate-pectin composite membrane；
(4) it is crosslinked: sodium alginate-pectin composite membrane is immersed in 2-4min in calcium chloride solution, after taking-up, vacuum drying, i.e.,
It can.
2. the preparation method of the modified composite membrane of sodium alginate-pectin according to claim 1, it is characterised in that: in step (3)
The pectin solution, sodium alginate soln mass ratio be (2-3): 1.
3. the preparation method of the modified composite membrane of sodium alginate-pectin according to claim 1, it is characterised in that: the ultrasound
The condition of processing are as follows: ultrasonic power 500W, supersonic frequency 35-45KHz.
4. the preparation method of the modified composite membrane of sodium alginate-pectin according to claim 1, it is characterised in that: the homogeneous
The pressure of change is 30MPa.
5. the preparation method of the modified composite membrane of sodium alginate-pectin according to claim 1, it is characterised in that: the chlorination
The mass concentration of calcium solution is 1-3%.
6. the preparation method of the modified composite membrane of sodium alginate-pectin according to claim 1, it is characterised in that: the vacuum
Dry condition are as follows: 35-45 DEG C of temperature, time 1-2h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811523350.0A CN109651633A (en) | 2018-12-13 | 2018-12-13 | The preparation method of the modified composite membrane of sodium alginate-pectin |
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| CN201811523350.0A CN109651633A (en) | 2018-12-13 | 2018-12-13 | The preparation method of the modified composite membrane of sodium alginate-pectin |
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| CN109651633A true CN109651633A (en) | 2019-04-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111869728A (en) * | 2020-07-16 | 2020-11-03 | 广西壮族自治区农业科学院 | Nano pectin coating and preparation method and application thereof |
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2018
- 2018-12-13 CN CN201811523350.0A patent/CN109651633A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111869728A (en) * | 2020-07-16 | 2020-11-03 | 广西壮族自治区农业科学院 | Nano pectin coating and preparation method and application thereof |
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Application publication date: 20190419 |