CN113667157B - Preparation method of functional mugwort leaf polysaccharide composite film - Google Patents
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- CN113667157B CN113667157B CN202110977286.9A CN202110977286A CN113667157B CN 113667157 B CN113667157 B CN 113667157B CN 202110977286 A CN202110977286 A CN 202110977286A CN 113667157 B CN113667157 B CN 113667157B
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- 235000003261 Artemisia vulgaris Nutrition 0.000 title claims abstract description 82
- 239000002131 composite material Substances 0.000 title claims abstract description 77
- 229920001282 polysaccharide Polymers 0.000 title claims abstract description 65
- 239000005017 polysaccharide Substances 0.000 title claims abstract description 65
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 150000004676 glycans Chemical class 0.000 title claims abstract 12
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims abstract description 39
- 235000010413 sodium alginate Nutrition 0.000 claims abstract description 37
- 239000000661 sodium alginate Substances 0.000 claims abstract description 37
- 229940005550 sodium alginate Drugs 0.000 claims abstract description 37
- 229920001592 potato starch Polymers 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- -1 DPPH free radical Chemical class 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 16
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- 239000012153 distilled water Substances 0.000 claims description 13
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000000243 solution Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 235000011187 glycerol Nutrition 0.000 claims description 3
- 239000000049 pigment Substances 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 10
- 230000003647 oxidation Effects 0.000 abstract description 9
- 238000007254 oxidation reaction Methods 0.000 abstract description 9
- 238000001157 Fourier transform infrared spectrum Methods 0.000 abstract description 4
- 238000002411 thermogravimetry Methods 0.000 abstract description 4
- 238000012512 characterization method Methods 0.000 abstract description 3
- 239000005022 packaging material Substances 0.000 abstract description 3
- 150000004804 polysaccharides Chemical class 0.000 description 53
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 238000002834 transmittance Methods 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 235000019441 ethanol Nutrition 0.000 description 4
- 229920008262 Thermoplastic starch Polymers 0.000 description 3
- 238000002835 absorbance Methods 0.000 description 3
- 230000003064 anti-oxidating effect Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000005543 nano-size silicon particle Substances 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 239000012488 sample solution Substances 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 239000004628 starch-based polymer Substances 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- HHEAADYXPMHMCT-UHFFFAOYSA-N dpph Chemical compound [O-][N+](=O)C1=CC([N+](=O)[O-])=CC([N+]([O-])=O)=C1[N]N(C=1C=CC=CC=1)C1=CC=CC=C1 HHEAADYXPMHMCT-UHFFFAOYSA-N 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
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- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 229920001284 acidic polysaccharide Polymers 0.000 description 1
- 150000004805 acidic polysaccharides Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229920001222 biopolymer Polymers 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- MGJZITXUQXWAKY-UHFFFAOYSA-N diphenyl-(2,4,6-trinitrophenyl)iminoazanium Chemical compound [O-][N+](=O)C1=CC([N+](=O)[O-])=CC([N+]([O-])=O)=C1N=[N+](C=1C=CC=CC=1)C1=CC=CC=C1 MGJZITXUQXWAKY-UHFFFAOYSA-N 0.000 description 1
- 238000009447 edible packaging Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000007760 free radical scavenging Effects 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000001341 hydroxy propyl starch Substances 0.000 description 1
- 235000013828 hydroxypropyl starch Nutrition 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 231100001083 no cytotoxicity Toxicity 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 239000012785 packaging film Substances 0.000 description 1
- 229920006280 packaging film Polymers 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
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- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Classifications
-
- 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
- C08J2303/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2303/02—Starch; Degradation products thereof, e.g. dextrin
-
- 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
-
- 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)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The invention discloses a preparation method of a functional mugwort leaf polysaccharide composite film, which belongs to the technical field of packaging materials and comprises the following steps: extracting mugwort leaf polysaccharide with mugwort leaf water bath, preparing a composite film by mugwort leaf polysaccharide, sodium alginate and potato starch, carrying out characterization on the composite film, including microscope, scanning electron microscope, fourier transform infrared spectrum and thermogravimetric analysis, and then carrying out mechanical property and oxidation resistance test to obtain the performance of the composite film. The composite film added with the mugwort leaf polysaccharide 0.2 and g is smooth, compact in structure, excellent in mechanical property, high in tensile strength up to 9.84 Mpa, high in elongation at break up to 88.9%, and good in oxidation resistance, and the DPPH free radical clearance rate in the composite film added with the mugwort leaf polysaccharide 0.2 and g is up to 82.16%.
Description
Technical Field
The invention belongs to the technical field of packaging materials, and particularly relates to a preparation method of a functional mugwort leaf polysaccharide composite film.
Background
With the concern of people on food safety and the enhancement of environmental awareness, environmental pollution caused by plastic packaging has attracted extensive attention from the society. On one hand, petroleum resources are increasingly in shortage, and on the other hand, plastics prepared from petroleum are difficult to degrade after being used, and environmental pollution is easy to cause. In recent years, edible films made of natural sources such as polysaccharide proteins and lipids are popular, and are increasingly popularized and applied. The edible film has the advantages of environmental protection, natural degradation, wide sources and the like as a novel packaging material. The polysaccharide in the mugwort leaf is mainly acidic polysaccharide, has no cytotoxicity, and has the advantages of high safety, low cost, no toxicity, abundant sources and biocompatibility. Sodium alginate has good film forming property, and the film can be used as a degradable film material. Starch is a biopolymer, is considered as one of the best candidate materials for replacing petroleum-based polymers, and has wide application prospects.
Chinese patent CN109438742A discloses a preparation method of a cross-linked modified sodium alginate film, epoxy end-capped polyurethane is grafted onto sodium alginate under alkaline conditions, pure modified sodium alginate emulsion is obtained after acetone is removed, the mechanical property of the sodium alginate film can be improved, and raw materials for producing the acetone and the epoxy end-capped polyurethane in the whole process are toxic and have poor environmental protection. Chinese patent CN111218034a discloses a thermoplastic starch film and a preparation method thereof, wherein nano silicon dioxide can be uniformly dispersed in starch, the reinforcing effect of nano silicon dioxide on thermoplastic starch is fully exerted, the mechanical property of the thermoplastic starch film is improved, and the composite film prepared by the method has the advantages of inedibility of nano silicon dioxide and no oxidation resistance. Chinese patent CN109438772a discloses an edible packaging film, a preparation method and application thereof, wherein a thermoplastic hydroxypropyl starch-based composite material is prepared by a hot pressing method, and the composite film prepared by the method has low elongation at break and poor flexibility. According to research, the preparation and application of a composite film with mugwort leaf polysaccharide, sodium alginate and potato starch as main components are not reported at present.
The preparation method comprises the steps of firstly extracting mugwort leaves in a water bath, filtering mugwort leaf extract, centrifuging, precipitating with ethanol to obtain mugwort leaf polysaccharide, and preparing a composite film by using sodium alginate, potato starch and mugwort leaf polysaccharide. Subsequently, various performances and antioxidation applications of the composite membrane are tested, and no report or patent for preparing the mugwort leaf polysaccharide, sodium alginate and potato starch composite membrane exists at present. Compared with the traditional preparation method, the prepared composite film is edible, green and environment-friendly, has the advantages of stable product performance, oxidation resistance and the like, and simultaneously expands the application range of the mugwort leaf and improves the added value of the mugwort leaf product.
Disclosure of Invention
The invention aims to provide a preparation method of a functional mugwort leaf polysaccharide composite film. The preparation method is simple, the process is environment-friendly, and the preparation method can be used for mass production; the prepared composite film is smooth and flat, high in opacity and excellent in mechanical property; the addition of the mugwort leaf polysaccharide enables the composite film to have oxidation resistance, and improves comprehensive development and utilization of mugwort leaf resources.
The invention comprises the following steps:
1. extraction of mugwort leaf polysaccharide
Cutting mugwort leaves into small sections, cleaning, placing in a beaker of 1000 mL distilled water, heating in a water bath at 85-95 ℃ for 5 min, filtering to obtain mugwort leaves, removing impurities such as bitter substances, pigments and the like, drying mugwort leaves, crushing by a crusher, sieving with a 100-mesh sieve, weighing 10-100 g mugwort leaves powder, adding into the beaker, adding 500mL distilled water, heating in the water bath at 90 ℃ for extraction for 1-3 h, filtering the extracting solution while the extracting solution is hot, cooling, adding ethanol with 2-4 times of volume for precipitation, centrifuging to obtain mugwort leaf polysaccharide, drying and preserving;
2. preparation of mugwort leaf polysaccharide, sodium alginate and potato starch composite film
(1) Preparation of mugwort leaf polysaccharide, sodium alginate and potato starch composite film
1-3 g of sodium alginate is dissolved in 50-150 mL of distilled water, 50-70 ℃ magnetic stirring and heating are carried out for 1-2 h, 2-4 g of potato starch is dissolved in 40-60 mL of distilled water, 1-3 mL of glycerol is added, 0.05-0.4 g of mugwort leaf polysaccharide is added, water bath heating is carried out for 3-6 min at 85-95 ℃, 50-70 ℃ magnetic stirring and heating are carried out on the mixed solution for 10-20 min, ultrasound is carried out for 20-40 min, casting is carried out on a polytetrafluoroethylene plate, and drying is carried out in an oven at 30-50 ℃ for 24-h, thus obtaining mugwort leaf polysaccharide, sodium alginate and potato starch composite film.
(2) Preparation of sodium alginate and potato starch composite film
The preparation method of the sodium alginate and potato starch composite film is the same as that of the film containing the mugwort leaf polysaccharide, so that the sodium alginate and potato starch composite film is obtained, and mugwort leaf polysaccharide is not added. Here for comparison.
3. Characterization and performance test of mugwort leaf polysaccharide, sodium alginate and potato starch composite film
(1) Performing opacity test on the composite film at 300-700 nm by an ultraviolet spectrophotometer;
(2) Performing a water vapor transmittance test on the composite film;
(3) And (5) performing mechanical property test and antioxidation test on the composite film.
Description of the drawings:
FIG. 1 is a microscopic view of a composite film.
FIG. 2 is a scanning electron microscope image of the composite film.
FIG. 3 is a Fourier transform infrared spectrum of the composite film.
FIG. 4 is a thermogravimetric analysis of the composite film.
FIG. 5 is a schematic illustration of the mechanical properties of the composite film.
FIG. 6 is a schematic view of the oxidation resistance of the composite film.
The specific embodiment is as follows:
the following detailed description of the present invention is provided in connection with the examples, and it should be understood that the following detailed description is merely illustrative of the invention and is not intended to limit the scope of the invention.
Example 1: extraction of mugwort leaf polysaccharide and preparation of composite film
(1) Cutting folium Artemisiae Argyi into small pieces, cleaning, placing into 1000 mL distilled water beaker, heating in 90deg.C water bath for 5 min, filtering to obtain folium Artemisiae Argyi, removing bitter substances, pigment, etc., oven drying folium Artemisiae Argyi, pulverizing with pulverizer, sieving with 100 mesh sieve, weighing 50 g folium Artemisiae Argyi powder, adding into beaker, adding 500mL distilled water, heating in 90deg.C water bath, extracting 2h, filtering the extractive solution while it is hot, cooling, adding 3 times volume ethanol for precipitation, centrifuging to obtain folium Artemisiae Argyi polysaccharide, drying, and storing;
(2) Preparing a mugwort leaf polysaccharide, sodium alginate and potato starch composite film, dissolving sodium alginate 2g in 50-150 mL of distilled water, magnetically stirring and heating at 60 ℃ for 1 h, dissolving potato starch 2.5g in 50mL of distilled water, adding glycerol 2 mL, adding mugwort leaf polysaccharide 0.2g, heating in a 90 ℃ water bath for 5 min, magnetically stirring and heating the mixed solution at 60 ℃ for 15 min, ultrasonically treating for 30 min, pouring on a polytetrafluoroethylene plate, and drying in a 40 ℃ oven for 24h to obtain the mugwort leaf polysaccharide, sodium alginate and potato starch composite film;
(3) The preparation method of the sodium alginate and potato starch composite film is the same as that of the film containing the mugwort leaf polysaccharide, so that the sodium alginate and potato starch composite film is obtained, and mugwort leaf polysaccharide is not added. Here for comparison.
4. Example 2: performance test of mugwort leaf polysaccharide, sodium alginate and potato starch composite film
(1) The opacity of the sodium alginate, potato starch composite film and mugwort leaf polysaccharide, sodium alginate and potato starch composite film prepared in example 1 was tested at 550 nm by ultraviolet spectrophotometer to obtain an opacity of 3.31 mm of the sodium alginate and potato starch composite film with the increase of mugwort leaf polysaccharide -1 When the mugwort leaf polysaccharide of 0.2. 0.2g is added, the opacity reaches 3.48 mm -1 The increased opacity is beneficial for food protection;
(2) The water vapor transmittance of the sodium alginate and potato starch composite film is 0.099 d cm 2 After the mugwort leaf polysaccharide of 0.05 and g is added, the water vapor transmittance of the sodium alginate and potato starch composite film is 0.092 d cm 2 After adding 0.05. 0.05 g mugwort leaf polysaccharide, the water vapor transmission rate is reduced. As the addition of mugwort leaf polysaccharide increases, the water vapor transmittance increases, and the water vapor transmittance reaches the maximum value of 0.113 d cm when the mugwort leaf polysaccharide is added in an amount of 0.2g 2 ；
(3) The mechanical property test and the antioxidation test are carried out on the composite film, the tensile strength and the elongation at break of the film are measured on a tensile testing machine, and the testing speed is set to be 200 mm.min －1 The width is 4 and mm, the average value is taken 3 times in each group of tests, the tensile strength of the sodium alginate and potato starch composite film is 1.56 Mpa, the elongation at break is 59.7%, and when 0.2g mugwort leaf polysaccharide is added, the tensile strength of the mugwort leaf polysaccharide, sodium alginate and potato starch composite film is 9.84 Mpa, the tensile strength is improved by 7 times, and the elongation at break is 88.9%; the DPPH free radical scavenging ability experimental method comprises cutting composite films with different folium Artemisiae Argyi contents into blocks of 40×40 mm, and placing into distilled water of 100 mL for stirring and dissolving to obtain sample solution; 2.0. 2.0 mL sample solution and 2.0. 2.0 mL DPPH radical solution (1.0X10) -4 mol·L -1 ) Mixing uniformly, placing 0.5. 0.5 h in dark place, taking absolute ethyl alcohol as a reference, and measuring the absorbance value as A;2.0 The absorbance value of the mixed mL sample solution and 2.0 mL absolute ethyl alcohol is A 0 The method comprises the steps of carrying out a first treatment on the surface of the 2.0 mL of DPPH solution and 2.0. 2.0 mL Anhydrous ethanolThe absorbance value measured by the alcohol mixed solution is A 1 The formula:。
fig. 1 is a microscopic view of the composite film, wherein a is a sodium alginate and potato starch composite film, b is a mugwort leaf polysaccharide, sodium alginate and potato starch composite film, wherein mugwort leaf polysaccharide is 0.2g, and b is a composite film added with 0.2g mugwort leaf polysaccharide, which is smoother.
Fig. 2 is a scanning electron microscope image of the composite film, wherein a is a sodium alginate and potato starch composite film, b is a mugwort leaf polysaccharide, sodium alginate and potato starch composite film, wherein mugwort leaf polysaccharide is 0.2g, and b is a composite film added with 0.2g mugwort leaf polysaccharide, which is smoother.
FIG. 3 is a Fourier transform infrared spectrum of a composite film, from which 1602 cm can be seen -1 The nearby absorption peaks are asymmetric and symmetric stretching vibration peaks of sodium alginate COO-, the peak intensity is increased and then reduced along with the increase of the mugwort leaf polysaccharide, the peak intensity of a composite film of the mugwort leaf polysaccharide is lowest at 0.2g, the composite film is more tightly combined, and when the mugwort leaf polysaccharide of 0.3 g is added, the mugwort leaf polysaccharide provides more COO-, so that the peak intensity is increased, and the film combination tightness is reduced.
FIG. 4 is a thermogravimetric analysis of the composite film showing two different thermal degradation steps, and it can be seen that the thermal stability of the composite film added with 0.2. 0.2g mugwort leaf polysaccharide is better.
Fig. 5 is a schematic diagram of mechanical properties of the composite film, and it can be seen from the diagram that the tensile strength of the composite film of mugwort leaf polysaccharide 0.2 and g reaches 9.84 Mpa, and the elongation at break reaches 88.90%.
Fig. 6 is a schematic view of oxidation resistance of the composite film, and it can be seen from the figure that the clearance of DDPH free radical in the composite film added with 0.2. 0.2g mugwort leaf polysaccharide reaches 82.16%.
In summary, the invention extracts mugwort leaf polysaccharide by heating in water bath, prepares a composite film by mugwort leaf polysaccharide, sodium alginate and potato starch, and performs characterization on the composite film including microscope, scanning electron microscope, fourier transform infrared spectrum and thermogravimetric analysis, and then performs mechanical property and oxidation resistance test to obtain the performance of the composite film. The composite film added with the mugwort leaf polysaccharide 0.2 and g is smooth, compact in structure, excellent in mechanical property, high in tensile strength up to 9.84 Mpa, high in elongation at break up to 88.9%, and good in oxidation resistance, and the DPPH free radical clearance rate in the composite film added with the mugwort leaf polysaccharide 0.2 and g is up to 82.16%.
Claims (2)
1. A preparation method of a functional mugwort leaf polysaccharide composite film is characterized by comprising the following steps:
cutting mugwort leaves into small sections, cleaning, putting the mugwort leaves into a beaker, heating in distilled water at 85-95 ℃ for 4-6 min, filtering to obtain mugwort leaves, removing bitter substances and pigment impurities in the mugwort leaves, drying the mugwort leaves, crushing the mugwort leaves by using a crusher, sieving the mugwort leaves with a 100-mesh sieve, weighing 10-100 g of mugwort leaves, adding the mugwort leaves into the beaker, adding 500mL of distilled water, heating in the water bath at 90 ℃, extracting for 1-3 h, filtering the extracting solution, adding ethanol with 2-4 times of volume for precipitation, centrifuging, separating to obtain mugwort leaf polysaccharide, drying, crushing and storing;
preparing a mugwort leaf polysaccharide, sodium alginate and potato starch composite film, dissolving 2g of sodium alginate in 50-150 mL of distilled water, magnetically stirring and heating at 50-70 ℃ for 1-2 h, dissolving 2.5g of potato starch in 40-60 mL of distilled water, adding 1-3 mL of glycerin, adding 0.2g of mugwort leaf polysaccharide, heating in a water bath at 85-95 ℃ for 3-6 min, magnetically stirring and heating the mixed solution at 50-70 ℃ for 10-20 min, ultrasonically stirring for 20-40 min, pouring on a polytetrafluoroethylene plate, and drying in an oven at 30-50 ℃ for 24h to obtain the functional mugwort leaf polysaccharide, sodium alginate and potato starch composite film.
2. A functional mugwort leaf polysaccharide composite film, which is characterized in that the film is prepared by the method of claim 1.
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| CN102702579A (en) * | 2012-05-30 | 2012-10-03 | 江南大学 | Potato starch-based edible composite food packaging film and preparation method thereof |
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| CN111808333A (en) * | 2020-06-08 | 2020-10-23 | 大连工业大学 | High-tensile-strength composite polysaccharide edible film and preparation method thereof |
| CN112409649A (en) * | 2020-11-25 | 2021-02-26 | 华南理工大学 | Artemisia apiacea crude polysaccharide/chitosan edible composite film and preparation method and application thereof |
| CN112545926A (en) * | 2021-01-27 | 2021-03-26 | 安徽大学绿色产业创新研究院 | Comprehensive extraction method of folium artemisiae argyi volatile oil and folium artemisiae argyi total flavonoids and oxidation resistance evaluation of folium artemisiae argyi volatile oil |
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| CN110078958A (en) * | 2019-04-28 | 2019-08-02 | 齐鲁工业大学 | A kind of preparation method and application of bacteriostatic activity food package film |
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| CN102702579A (en) * | 2012-05-30 | 2012-10-03 | 江南大学 | Potato starch-based edible composite food packaging film and preparation method thereof |
| KR20150005304A (en) * | 2013-07-05 | 2015-01-14 | 고려대학교 산학협력단 | Edible Film of Tapioca Starch and Pullulan and Manufacturing Method Thereof |
| CN111808333A (en) * | 2020-06-08 | 2020-10-23 | 大连工业大学 | High-tensile-strength composite polysaccharide edible film and preparation method thereof |
| CN112409649A (en) * | 2020-11-25 | 2021-02-26 | 华南理工大学 | Artemisia apiacea crude polysaccharide/chitosan edible composite film and preparation method and application thereof |
| CN112545926A (en) * | 2021-01-27 | 2021-03-26 | 安徽大学绿色产业创新研究院 | Comprehensive extraction method of folium artemisiae argyi volatile oil and folium artemisiae argyi total flavonoids and oxidation resistance evaluation of folium artemisiae argyi volatile oil |
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