CN114539799B - Degradable plastic film with functions of preserving freshness and visually monitoring freshness of seafood and preparation method thereof - Google Patents
Degradable plastic film with functions of preserving freshness and visually monitoring freshness of seafood and preparation method thereof Download PDFInfo
- Publication number
- CN114539799B CN114539799B CN202210165053.3A CN202210165053A CN114539799B CN 114539799 B CN114539799 B CN 114539799B CN 202210165053 A CN202210165053 A CN 202210165053A CN 114539799 B CN114539799 B CN 114539799B
- Authority
- CN
- China
- Prior art keywords
- bagasse
- seafood
- freshness
- fiber
- plastic film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 235000014102 seafood Nutrition 0.000 title claims abstract description 55
- 229920006238 degradable plastic Polymers 0.000 title claims abstract description 51
- 239000002985 plastic film Substances 0.000 title claims abstract description 46
- 238000012544 monitoring process Methods 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 241000609240 Ambelania acida Species 0.000 claims abstract description 169
- 239000010905 bagasse Substances 0.000 claims abstract description 169
- 239000000835 fiber Substances 0.000 claims abstract description 108
- 229930002877 anthocyanin Natural products 0.000 claims abstract description 45
- 235000010208 anthocyanin Nutrition 0.000 claims abstract description 45
- 239000004410 anthocyanin Substances 0.000 claims abstract description 45
- 150000004636 anthocyanins Chemical class 0.000 claims abstract description 45
- 240000000111 Saccharum officinarum Species 0.000 claims abstract description 42
- 235000007201 Saccharum officinarum Nutrition 0.000 claims abstract description 42
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 41
- 239000004626 polylactic acid Substances 0.000 claims abstract description 41
- 229930006000 Sucrose Natural products 0.000 claims abstract description 13
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 claims abstract description 13
- 239000005720 sucrose Substances 0.000 claims abstract description 12
- 230000000007 visual effect Effects 0.000 claims abstract description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 48
- 239000000243 solution Substances 0.000 claims description 48
- 238000001035 drying Methods 0.000 claims description 44
- 239000000843 powder Substances 0.000 claims description 36
- 239000002121 nanofiber Substances 0.000 claims description 35
- 238000002156 mixing Methods 0.000 claims description 30
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 24
- 239000000725 suspension Substances 0.000 claims description 24
- 239000000047 product Substances 0.000 claims description 23
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 22
- 239000002002 slurry Substances 0.000 claims description 19
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 18
- 238000003828 vacuum filtration Methods 0.000 claims description 18
- 239000008367 deionised water Substances 0.000 claims description 15
- 229910021641 deionized water Inorganic materials 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 12
- 238000000855 fermentation Methods 0.000 claims description 12
- 239000000706 filtrate Substances 0.000 claims description 12
- JJTUDXZGHPGLLC-UHFFFAOYSA-N lactide Chemical compound CC1OC(=O)C(C)OC1=O JJTUDXZGHPGLLC-UHFFFAOYSA-N 0.000 claims description 12
- 239000004310 lactic acid Substances 0.000 claims description 11
- 235000014655 lactic acid Nutrition 0.000 claims description 11
- 229960000583 acetic acid Drugs 0.000 claims description 10
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 9
- 239000012528 membrane Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 claims description 8
- 238000001291 vacuum drying Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 238000009210 therapy by ultrasound Methods 0.000 claims description 7
- BYEAHWXPCBROCE-UHFFFAOYSA-N 1,1,1,3,3,3-hexafluoropropan-2-ol Chemical compound FC(F)(F)C(O)C(F)(F)F BYEAHWXPCBROCE-UHFFFAOYSA-N 0.000 claims description 6
- 241000186660 Lactobacillus Species 0.000 claims description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 6
- 239000003054 catalyst Substances 0.000 claims description 6
- 230000004151 fermentation Effects 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 239000012362 glacial acetic acid Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229940039696 lactobacillus Drugs 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 230000007935 neutral effect Effects 0.000 claims description 6
- 239000012286 potassium permanganate Substances 0.000 claims description 6
- 238000002390 rotary evaporation Methods 0.000 claims description 6
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 claims description 6
- 229960002218 sodium chlorite Drugs 0.000 claims description 6
- 239000012974 tin catalyst Substances 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- 239000010936 titanium Substances 0.000 claims description 6
- 238000009777 vacuum freeze-drying Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 235000006408 oxalic acid Nutrition 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 7
- 150000001412 amines Chemical class 0.000 description 11
- 230000000035 biogenic effect Effects 0.000 description 11
- 229960004793 sucrose Drugs 0.000 description 10
- 238000004821 distillation Methods 0.000 description 8
- 241000238557 Decapoda Species 0.000 description 6
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 6
- 235000013305 food Nutrition 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 241000251468 Actinopterygii Species 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 235000013372 meat Nutrition 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- MCSXGCZMEPXKIW-UHFFFAOYSA-N 3-hydroxy-4-[(4-methyl-2-nitrophenyl)diazenyl]-N-(3-nitrophenyl)naphthalene-2-carboxamide Chemical compound Cc1ccc(N=Nc2c(O)c(cc3ccccc23)C(=O)Nc2cccc(c2)[N+]([O-])=O)c(c1)[N+]([O-])=O MCSXGCZMEPXKIW-UHFFFAOYSA-N 0.000 description 1
- 206010067484 Adverse reaction Diseases 0.000 description 1
- 206010002198 Anaphylactic reaction Diseases 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000006838 adverse reaction Effects 0.000 description 1
- 208000003455 anaphylaxis Diseases 0.000 description 1
- -1 ascorbyl cyanidin Chemical compound 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- VEVZSMAEJFVWIL-UHFFFAOYSA-O cyanidin Natural products [O+]=1C2=CC(O)=CC(O)=C2C=C(O)C=1C1=CC=C(O)C(O)=C1 VEVZSMAEJFVWIL-UHFFFAOYSA-O 0.000 description 1
- 235000007336 cyanidin Nutrition 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004811 liquid chromatography Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000009450 smart packaging Methods 0.000 description 1
- 238000001179 sorption measurement 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
- C08J2397/00—Characterised by the use of lignin-containing materials
- C08J2397/02—Lignocellulosic material, e.g. wood, straw or bagasse
-
- 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
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
-
- 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
- C08J2497/00—Characterised by the use of lignin-containing materials
- C08J2497/02—Lignocellulosic material, e.g. wood, straw or bagasse
-
- 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
- C08K5/15—Heterocyclic compounds having oxygen in the ring
- C08K5/151—Heterocyclic compounds having oxygen in the ring having one oxygen atom in the ring
- C08K5/1545—Six-membered rings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Landscapes
- 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)
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The invention discloses a degradable plastic film capable of keeping seafood fresh and visually monitoring freshness of seafood and a preparation method thereof. The seafood freshness is displayed by indicating the color change of the film, the visual and intuitive monitoring of the freshness is realized, and the full utilization of the sugarcane components is realized, namely, the sugarcane peel is used for preparing the sugarcane peel anthocyanin, the sucrose is used for preparing the polylactic acid, the bagasse is used for preparing the sugarcane fibers, and the degradable plastic film is obtained by effectively combining the sugarcane peel anthocyanin, the polylactic acid and the sugarcane fibers.
Description
Technical Field
The invention belongs to the field of intelligent packaging, and particularly relates to a degradable plastic film capable of keeping seafood fresh and visually monitoring the freshness of seafood and a preparation method thereof.
Background
The life and health are the most basic requirements of people and are important components of people for the direction of beautiful life. At present, with the improvement of living standard of people, more and more seafood foods can be bought by people, but if the deteriorated seafood foods are bought, anaphylactic reaction can be caused to people after eating the deteriorated seafood foods, and poisoning can be caused even seriously. This is because the deteriorated seafood will release biogenic amine, and the released biogenic amine will cause the above mentioned adverse reactions, thus posing a threat to the life health of people.
The freshness of the seafood is inversely proportional to the biogenic amine content of the seafood, i.e., the fresher the seafood is, the less biogenic amine is. Currently, methods for monitoring biogenic amine in seafood include gas chromatography, liquid chromatography, electronic nose, electronic tongue, pH sensitive dye and the like. However, the methods have the problems of adoption of precise instruments, complex treatment of samples to be detected, potential safety hazards, inconvenience in operation and the like, so that the methods are difficult to be widely applied. Therefore, a substance which is harmless to human beings, can conveniently monitor biogenic amine released in the seafood spoilage process and visually shows the freshness of the seafood is sought. The anthocyanin is a natural nontoxic water-soluble pigment, has the oxidation resistance and can delay the oxidation process of food, thereby playing a role in keeping food fresh; and the anthocyanin can change color along with the change of the pH value so as to show the freshness of the seafood.
Anthocyanins are typically present in flowers, fruits and rhizomes of deep red, purple or blue plants. The purple-peel sugarcane peel contains a large amount of sugarcane peel anthocyanin, however, after the sugarcane is extracted from cane sugar, a large amount of residual bagasse and peel are generally directly discarded or burnt, and are not effectively utilized.
Disclosure of Invention
The invention aims to provide a degradable plastic film capable of keeping seafood fresh and visually monitoring freshness of seafood and a preparation method thereof, and aims to solve the problems that the existing seafood fresh is difficult to visually monitor and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
a degradable plastic film for keeping seafood fresh and visually monitoring seafood freshness is prepared from the following raw materials in parts by mass: the sugarcane bagasse fiber composite material comprises, by weight, 2% -5% of bagasse anthocyanin, 70% of bagasse fiber, 17% -23% of bagasse nanofiber and 5% -10% of polylactic acid, wherein the bagasse anthocyanin is extracted from sugarcane peel, the bagasse fiber is prepared from bagasse, the bagasse nanofiber is prepared from bagasse fiber, and the polylactic acid is prepared from sucrose.
A preparation method of a degradable plastic film for keeping seafood fresh and visually monitoring freshness of seafood comprises the following steps:
(1) Drying the sugarcane peel to constant weight, crushing the sugarcane peel into powder after drying, screening the powder with the particle size of 40-60 meshes, mixing the powder with acidified ethanol in a ratio of 1: (20-25), stirring for 1-3 h at 40-50 ℃, carrying out vacuum filtration, carrying out dark rotary evaporation and concentration on the filtrate at 40-50 ℃ to obtain a concentrated solution, and carrying out vacuum freeze drying on the concentrated solution for 24-48 h to obtain the bagasse anthocyanin;
(2) Carrying out anaerobic fermentation on sucrose by using lactobacillus under the conditions that the temperature is 38-42 ℃ and the pH is 5.5-6.5 to obtain fermentation liquor containing lactic acid, adding ethyl acetate into the fermentation liquor containing the lactic acid to extract to obtain extract liquor, carrying out reduced pressure distillation on the extract liquor at normal temperature, adding a titanium catalyst with the mass fraction of 0.5-2% into the lactic acid, heating to 160-270 ℃, reacting for 18-24 h under the vacuum degree of 1.33-2.66 kpa, then obtaining lactide through distillation, mixing the lactide with an organic tin catalyst with the mass fraction of 0.3-0.7%, and reacting for 1-5 h at 180-220 ℃ to obtain polylactic acid;
(3) Drying bagasse, crushing the dried bagasse into bagasse powder, screening the bagasse powder with the particle size of 60-80 meshes, mixing 1 part by mass of the bagasse powder with 0.3-0.5 part by mass of sodium chlorite and 2-4 parts by mass of glacial acetic acid, shaking for 1-2 hours at 70-80 ℃, carrying out vacuum filtration to obtain filter residue, preparing 1 part by mass of the filter residue into bagasse fiber slurry with the mass fraction of 4-6%, fluffing the bagasse fiber slurry to obtain bagasse fiber suspension, dispersing the bagasse fiber suspension, filtering to obtain filter residue after dispersion, and drying the filter residue to obtain bagasse fiber;
(4) Mixing the bagasse fiber obtained in the step (3) with potassium permanganate in a ratio of 1: (1.2-1.4), adding a sulfuric acid solution with the mass concentration of 1% -3% to obtain a mixed solution, reacting the mixed solution at 50-60 ℃ for 1-3 h, adding a hydrogen peroxide solution with the mass concentration of 30% to obtain a fiber gel product, carrying out vacuum filtration on the fiber gel product, repeatedly washing the fiber gel product with deionized water until the pH of the filtrate of the fiber gel product is neutral, and carrying out vacuum drying to obtain the bagasse nanofiber;
(5) Mixing bagasse fibers and bagasse nanofibers, adding deionized water to prepare a fiber suspension, adding polylactic acid dissolved by hexafluoroisopropanol into the fiber suspension, stirring for 6-8 hours to obtain a polylactic acid-containing fiber suspension solution, carrying out ultrasonic treatment on the polylactic acid-containing fiber suspension, adding bagasse anthocyanin, stirring for 0.5-1.5 hours at 35-45 ℃, casting onto a flat bottom mold to obtain a visual indication membrane liquid, and drying the visual indication membrane liquid at 35-45 ℃ for 8-12 hours to obtain the degradable plastic membrane.
Further, the sugarcane peels are dried in a constant-temperature drying oven at 40-50 ℃ to constant weight in the step (1).
Further, the volume ratio of the acid solution to the ethanol in the acidified ethanol in the step (1) is (1-1.5): 4.
further, the acid solution is one of an acetic acid solution, an oxalic acid solution and a butyric acid solution, and the concentration of the acid solution is 1mol/L.
Further, the temperature rise speed in the step (2) is 5 ℃/min;
in the step (3), the defibering rotating speed is 5000-7000 rpm, and the time is 3-5 min; the dispersion rotating speed is 20000-30000 rpm, and the time is 2-4 min; the drying temperature is 105 ℃ and the drying time is 6h.
Further, the mass ratio of the bagasse fibers to the sulfuric acid solution in the step (4) is 1: (35-45).
Further, the mass ratio of the bagasse fibers to the hydrogen peroxide solution in the step (4) is 1: (1-3).
Further, in the step (4), the vacuum drying temperature is 50-60 ℃ and the time is 8h.
Further, the ultrasonic treatment time in the step (5) is 30min.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention provides a degradable plastic film which is prepared by utilizing sugarcane full components and has the functions of preserving and visually monitoring the freshness of seafood and a preparation method thereof, which realize that the freshness of the seafood is presented through the color change of an indicating film and the freshness of the seafood is visually and intuitively monitored, and have the following specific advantages that:
(1) The invention prepares the visual indication film of degradable plastics by utilizing the components of the sugarcane, realizes the full utilization of the components of the sugarcane, namely prepares the anthocyanin of the sugarcane peel, prepares the polylactic acid by utilizing the sucrose, prepares the bagasse fiber by utilizing the bagasse, and obtains the degradable plastic film by effectively combining the anthocyanin of the sugarcane peel, the polylactic acid and the sugarcane fiber. According to the degradable plastic film, bagasse is prepared into bagasse fibers and the bagasse fibers are used for preparing the bagasse nanofibers, the bagasse fibers and the bagasse nanofibers are mutually interwoven to establish a three-dimensional network matrix structure, then the bagasse anthocyanin and the polylactic acid are introduced, the plastic visual indicating film with the functions of visually monitoring the freshness of seafood and degrading is obtained, the petroleum-based plastic taking fossil energy as a raw material at present can be replaced, the purpose of replacing plastic with paper is achieved, and a new technology is provided for preparation of environment-friendly materials.
(2) According to the degradable plastic film for preserving and visually monitoring the freshness of the seafood, which is prepared by the invention, the adding of the bagasse anthocyanin has the function of monitoring the freshness of the seafood without mutual contact with the seafood, so that the freshness of the seafood can be visually and intuitively displayed by indicating the color change of the film, and the pollution to the seafood caused by direct contact is prevented; in addition, the anthocyanin has strong oxidation resistance, so the indicating film also has the function of keeping seafood fresh.
(3) The bagasse nanofiber and the bagasse fibers are mixed in a certain proportion, and the main purpose is to firstly establish a three-dimensional network matrix structure by mutually interweaving the high-fineness degree of the bagasse nanofiber and the bagasse fibers, so that the bagasse fibers are densified to form a three-dimensional porous network structure, the difference of refractive index between cellulose and air is reduced, the light transmittance of an indicating film is improved, a large number of hydrogen bonds are generated between hydroxyl groups on the bagasse nanofiber and hydroxyl groups on the bagasse fibers, the strength of the matrix is improved, the bagasse nanofiber has a large specific surface area, the adsorption effect on the bagasse anthocyanin can be realized, the bagasse anthocyanin is better dispersed in the matrix, and the sensitivity of monitoring the freshness of seafood is improved.
(4) The degradable plastic film prepared by utilizing the hydrogen bonding effect among the polylactic acid, the bagasse nanofiber and the bagasse fiber has good mechanical property, thermal stability and degradability. Both the bagasse fiber and the bagasse nanofiber are high polymers containing a large amount of hydroxyl groups, and meanwhile, the polylactic acid is a bio-friendly high polymer containing a large amount of carboxyl groups, and a large amount of hydrogen bonds are formed between the hydroxyl groups and the carboxyl groups, so that the mechanical property of the degradable plastic film is greatly improved; and the addition of the polylactic acid can fill a larger gap between bagasse fibers, reduce air in the indicating film and enable the refractive indexes of different substances in the indicating film to be nearly consistent, so that the scattering of incident light on the indicating film is reduced, the light transmittance of the indicating film is improved, and the indicating film has good transparency on the basis of certain haze.
(5) The bagasse anthocyanin is adsorbed by the large specific surface area of the bagasse nanofiber so as to be uniformly dispersed in the matrix, the bagasse nanofiber and the bagasse fiber have good air permeability, biogenic amine generated by seafood can smoothly enter the degradable plastic indicating film, a large number of hydroxyl groups on the surfaces of the two fibers can form covalent bonds with biogenic amine to fix biogenic amine, so that the bagasse anthocyanin can be better contacted with biogenic amine, the sensitivity of the indicating film on seafood freshness monitoring is further improved, meanwhile, the anthocyanin is directly contacted with oxygen, the contact of the seafood and the oxygen is delayed, so that the seafood is kept fresh, the transparency of the indicating film is improved by adding polylactic acid, and the change of the color of the indicating film caused by the change of the bagasse anthocyanin under different biogenic amine concentrations can be more intuitively observed.
Detailed Description
The invention is further described below.
The degradable plastic film is composed of bagasse anthocyanin, bagasse fiber, bagasse nanofiber and polylactic acid, wherein the bagasse anthocyanin is extracted from sugarcane peel, the bagasse fiber is prepared from bagasse, the bagasse nanofiber is prepared from bagasse fiber, and the polylactic acid is prepared from sucrose. The mass fraction of the bagasse anthocyanin in the degradable plastic film is 2-5%, the mass fraction of the bagasse fiber is 70%, the mass fraction of the bagasse nanofiber is 17-23%, and the mass fraction of the polylactic acid is 5-10%.
The bagasse fiber and the bagasse nanofiber are used as matrixes to form a three-dimensional network structure, the polylactic acid is inserted into the three-dimensional network structure of the matrixes, the polylactic acid and hydroxyl on the matrixes generate hydrogen bonding, the strength of the matrixes is enhanced, and the bagasse anthocyanin is uniformly dispersed in the matrixes.
A preparation method of a degradable plastic film capable of keeping seafood fresh and visually monitoring seafood freshness comprises the following steps:
(1) Extracting the bagasse anthocyanin from the sugarcane peel: drying sugarcane peel in a constant-temperature drying oven at 40-50 ℃ to constant weight, crushing the sugarcane peel into powder after drying, selecting the powder with the particle size of 40-60 meshes, mixing the powder with acidified ethanol in a ratio of 1: (20-25), stirring for 1-3 h at 40-50 ℃, carrying out vacuum filtration, carrying out dark rotary evaporation and concentration on the filtrate at 40-50 ℃ to obtain a concentrated solution, carrying out vacuum freeze drying on the concentrated solution for 24-48 h to obtain the sugarcane peel anthocyanin, and storing the sugarcane peel anthocyanin at 4 ℃ in the dark. The volume ratio of the acid solution to the ethanol in the acidified ethanol is (1-1.5): 4. the acid solution is one of acetic acid solution, oxalic acid solution and butyric acid solution, and the concentration of the acid solution is 1mol/L.
(2) Preparing polylactic acid from sucrose: carrying out anaerobic fermentation on sucrose by using lactobacillus at the temperature of 38-42 ℃ and under the condition that the pH value is 5.5-6.5 to obtain fermentation liquor containing lactic acid, adding ethyl acetate into the fermentation liquor containing the lactic acid to extract to obtain extract liquor, and distilling the extract liquor under reduced pressure at normal temperature, wherein the undistilled product is the lactic acid. Adding lactic acid into a stirred tank reactor, adding 0.5-2% by mass of a titanium catalyst, heating to 160-270 ℃ at a speed of 5 ℃/min, reacting for 18-24 h with a vacuum degree of 1.33-2.66 kpa, distilling to obtain lactide, mixing the lactide with 0.3-0.7% by mass of an organic tin catalyst, and reacting for 1-5 h at a temperature of 180-220 ℃ to obtain polylactic acid.
(3) Preparing bagasse fibers from bagasse: drying the bagasse, and then crushing the bagasse into bagasse powder, wherein the grain size of the bagasse powder is 60-80 meshes. Mixing 1 part by mass of bagasse powder, 0.3-0.5 part by mass of sodium chlorite and 2-4 parts by mass of glacial acetic acid, shaking for 1-2 hours at the temperature of 70-80 ℃, and performing vacuum filtration to obtain filter residue. Preparing bagasse fiber slurry with the mass fraction of 4-6% from 1 part by mass of filter residue, adding the slurry into a standard slurry fluffer, fluffing at 5000-7000 rpm for 3-5 min to obtain bagasse fiber suspension, adding the bagasse fiber suspension into a dispersion machine, dispersing at 20000-30000 rpm for 2-4 min, filtering with a pulp bag to obtain filter residue, and drying the filter residue in a 105 ℃ oven for 6h to obtain bagasse fiber.
(4) Preparing bagasse nano-fibers from bagasse fibers: mixing the bagasse fiber obtained in the step (3) with potassium permanganate in a ratio of 1: (1.2-1.4), adding a sulfuric acid solution with the mass concentration of 1% -3% to obtain a mixed solution, reacting the mixed solution at 50-60 ℃ for 1-3 h, adding a hydrogen peroxide solution with the mass concentration of 30% to obtain a fiber gel product, carrying out vacuum filtration on the fiber gel product, repeatedly washing the fiber gel product with deionized water until the pH of the filtrate of the fiber gel product is neutral, and carrying out vacuum drying at 50-60 ℃ for 8h to obtain the bagasse nanofiber. The mass ratio of the bagasse fibers to the sulfuric acid solution is 1: (35-45), wherein the mass ratio of the bagasse fibers to the hydrogen peroxide solution is 1: (1-3).
(5) Preparing a degradable plastic film: mixing the bagasse fibers obtained in the step (3) with the bagasse nanofibers obtained in the step (4), adding deionized water to prepare a fiber suspension, adding polylactic acid dissolved by hexafluoroisopropanol into the fiber suspension, stirring for 6-8 hours to obtain a polylactic acid-containing fiber suspension solution, ultrasonically treating the polylactic acid-containing fiber suspension for 30 minutes, adding the ascorbyl cyanidin, stirring for 0.5-1.5 hours at 35-45 ℃, casting onto a flat bottom mold to obtain a visual indication membrane liquid, and drying the visual indication membrane liquid in a drying oven at 35-45 ℃ for 8-12 hours to obtain the degradable plastic membrane. The mass fraction of the bagasse anthocyanin is 2-5%, the mass fraction of the bagasse fiber is 70%, the mass fraction of the bagasse nanofiber is 17-23%, and the mass fraction of the polylactic acid is 5-10%.
The present invention will be described in detail with reference to examples. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The following detailed description is illustrative of the embodiments and is intended to provide further details of the invention. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention.
Example 1
Drying sugarcane peel in a constant-temperature drying oven at 40 ℃ to constant weight, crushing the sugarcane peel into powder after drying, selecting powder with the particle size of 40 meshes, mixing 40g of acidified ethanol prepared from 20ml of 1mol/L acetic acid solution and 80ml of ethanol with 2g of powder, stirring for 3h at 40 ℃, carrying out vacuum filtration, carrying out rotary evaporation and concentration on filtrate at 40 ℃ in the dark to obtain concentrated solution, carrying out vacuum freeze drying on the concentrated solution for 48h to obtain sugarcane peel anthocyanin, and storing the sugarcane peel anthocyanin in the dark at 4 ℃. Carrying out anaerobic fermentation on sucrose by using lactobacillus at 38 ℃ and pH of 5.5, then adding ethyl acetate for extraction, carrying out reduced pressure distillation on extract liquor at normal temperature, adding 100g of undistilled product into a stirred tank reactor, adding 0.5g of titanium catalyst, heating to 160 ℃ at the speed of 5 ℃/min, reacting for 24 hours at the vacuum degree of 1.33kpa, then carrying out distillation to obtain lactide, mixing 10g of lactide with 0.03g of organic tin catalyst, and reacting for 5 hours at 180 ℃ to obtain polylactic acid. Drying the bagasse, and then crushing the bagasse into bagasse powder, wherein the grain size of the bagasse powder is 60 meshes. 10g of bagasse powder, 3g of sodium chlorite and 20g of glacial acetic acid are mixed, then the mixture is shaken for 2 hours at the temperature of 70 ℃, and vacuum filtration is carried out to obtain filter residue. Adding 120ml of deionized water into 5g of filter residue to prepare bagasse fiber slurry with the mass fraction of 4%, adding the slurry into a standard slurry fluffer, fluffing at 5000rpm for 5min, adding into a dispersion machine, dispersing at 20000rpm for 4min, filtering with a slurry bag to obtain filter residue, and drying the filter residue in a 105 ℃ oven for 6h to obtain the bagasse fiber. Mixing 1g of bagasse fiber with 1.2g of potassium permanganate, adding 35g of 1% sulfuric acid solution with mass concentration, reacting for 3 hours at 50 ℃, adding 1g of 30% hydrogen peroxide solution with mass concentration, performing vacuum filtration, repeatedly washing with deionized water until the pH of the filtrate of the fiber gel product is neutral, and performing vacuum drying on the fiber gel product for 8 hours at 50-60 ℃ to obtain the bagasse nanofiber. Mixing 7g of bagasse fibers and 1.8g of bagasse nanofibers, adding 100ml of deionized water to prepare a fiber suspension, adding 0.7g of polylactic acid dissolved by 20ml of hexafluoroisopropanol solution into the fiber suspension, stirring for 6 hours, carrying out ultrasonic treatment for 30min, adding 0.5g of bagasse anthocyanin, stirring for 1.5 hours at 35 ℃, casting into a flat bottom mold, and drying in a drying oven at 35 ℃ for 12 hours to obtain the degradable plastic film. The mass fraction of the bagasse anthocyanin added into the degradable plastic film is 5%, the mass fraction of the bagasse fiber is 70%, the mass fraction of the bagasse nanofiber is 18%, and the mass fraction of the polylactic acid is 7%. The tensile strength of the prepared degradable plastic film is 48.7Mpa, then the degradable plastic film is pasted in a box cover filled with the raw fish meat, then the box is placed at the temperature of minus 16 ℃ for 48 hours, the color of the degradable plastic film is still observed to be light pink, the raw fish meat is proved to be still fresh, after the box is placed for three months, the color of the degradable plastic film is observed to be changed from light pink to colorless, and the freshness degree of the raw fish meat is proved to be reduced.
Example 2
Drying sugarcane peel in a constant-temperature drying oven at 45 ℃ to constant weight, crushing the sugarcane peel into powder after drying, selecting powder with the particle size of 50 meshes, mixing acidified ethanol prepared by mixing 26ml of 1mol/L oxalic acid solution and 80ml of ethanol, mixing 46g of the acidified ethanol with 2g of the powder, stirring for 2 hours at 45 ℃, carrying out vacuum filtration, carrying out rotary evaporation and concentration on filtrate at 45 ℃ in the dark to obtain concentrated solution, carrying out vacuum freeze drying on the concentrated solution for 36 hours to obtain sugarcane peel anthocyanin, and storing the sugarcane peel anthocyanin in the dark at 4 ℃. Carrying out anaerobic fermentation on sucrose by using lactobacillus at 40 ℃ and pH of 6.0, then adding ethyl acetate for extraction, carrying out reduced pressure distillation on extract liquor at normal temperature, adding 100g of undistilled product into a stirred tank reactor, adding 1.25g of titanium catalyst, heating to 215 ℃ at the speed of 5 ℃/min, reacting for 21 hours at the vacuum degree of 1.99kpa, then carrying out distillation to obtain lactide, mixing 10g of lactide with 0.05g of organic tin catalyst, and reacting for 3 hours at 200 ℃ to obtain polylactic acid. Drying the bagasse, and then crushing the bagasse into bagasse powder, wherein the grain size of the bagasse powder is 70 meshes. 10g of bagasse powder, 4g of sodium chlorite and 30g of glacial acetic acid are mixed, then the mixture is shaken for 1.5h at the temperature of 75 ℃, and vacuum filtration is carried out to obtain filter residue. Adding 5g of filter residue into 95ml of deionized water to prepare bagasse fiber slurry with the mass fraction of 5%, adding the slurry into a standard slurry fluffer, fluffing at 6000rpm for 4min, then adding into a dispersion machine, dispersing at 25000rpm for 3min, then filtering with a slurry bag to obtain filter residue, and drying the filter residue in a 105 ℃ oven for 6h to obtain the bagasse fiber. Mixing 1g of bagasse fiber with 1.3g of potassium permanganate, adding 40g of sulfuric acid solution with the mass concentration of 2%, reacting for 2 hours at 55 ℃, adding 2g of hydrogen peroxide solution with the mass concentration of 30%, performing vacuum filtration, repeatedly washing with deionized water until the pH of the filtrate of the fiber gel product is neutral, and performing vacuum drying on the fiber gel product for 8 hours at 50-60 ℃ to obtain the bagasse nanofiber. Mixing 7g of bagasse fibers and 1.7g of bagasse nanofibers, adding 100ml of deionized water to prepare a fiber suspension, adding 1g of polylactic acid dissolved by 20ml of hexafluoroisopropanol solution into the fiber suspension, stirring for 7 hours, carrying out ultrasonic treatment for 30min, adding 0.3g of bagasse anthocyanin, stirring for 1 hour at 40 ℃, casting into a flat bottom mold, and drying in a drying oven at 40 ℃ for 10 hours to obtain the degradable plastic film. The mass fraction of the bagasse anthocyanin added into the degradable plastic film is 3%, the mass fraction of the bagasse fiber is 70%, the mass fraction of the bagasse nanofiber is 17%, and the mass fraction of the polylactic acid is 10%. The tensile strength of the prepared degradable plastic film is 57.2Mpa, then the degradable plastic film is pasted in a box cover filled with the raw shrimps, then the box is placed at 4 ℃ for 24 hours, the color of the degradable plastic film is still kept light pink, the fresh raw shrimps are proved, the color of the degradable plastic film is observed to be changed from light pink to brownish green after the box is placed for 10 days, and the deterioration of the raw shrimps is proved.
Example 3
Drying sugarcane peel in a constant-temperature drying oven at 50 ℃ to constant weight, crushing the sugarcane peel into powder after drying, selecting powder with the particle size of 60 meshes, mixing 50g of acidified ethanol prepared by mixing 30ml of 1mol/L butyric acid solution and 80ml of ethanol with 2g of powder, stirring for 1h at 50 ℃, carrying out vacuum filtration, carrying out rotary evaporation and concentration on filtrate at 50 ℃ in the dark to obtain concentrated solution, carrying out vacuum freeze drying on the concentrated solution for 24h to obtain the sugarcane peel anthocyanin, and storing the sugarcane peel anthocyanin in the dark at 4 ℃. Carrying out anaerobic fermentation on sucrose by using lactobacillus at 42 ℃ and pH of 6.5, then adding ethyl acetate for extraction, carrying out reduced pressure distillation on extract liquor at normal temperature, adding 100g of undistilled product into a stirred tank reactor, adding 2g of titanium catalyst, heating to 270 ℃ at the rate of 5 ℃/min, reacting for 18 hours at the vacuum degree of 2.66kpa, then carrying out distillation to obtain lactide, mixing 10g of lactide with 0.07g of organic tin catalyst, and reacting for 1 hour at 220 ℃ to obtain polylactic acid. Drying bagasse, crushing the bagasse into bagasse powder, and selecting the bagasse powder with the particle size of 80 meshes. 10g of bagasse powder, 5g of sodium chlorite and 40g of glacial acetic acid are mixed, then the mixture is shaken for 1 hour at the temperature of 80 ℃, and vacuum filtration is carried out to obtain filter residue. Adding 79ml of deionized water into 5g of filter residue to prepare bagasse fiber slurry with the mass fraction of 6%, adding the slurry into a standard slurry fluffer, fluffing at 7000rpm for 3min, then adding into a dispersion machine, dispersing at 30000rpm for 2min, then filtering with a slurry bag to obtain filter residue, and drying the filter residue in a 105 ℃ oven for 6h to obtain bagasse fiber. Mixing 1g of bagasse fiber with 1.4g of potassium permanganate, adding 45g of 3% sulfuric acid solution at a mass concentration, reacting for 1 hour at 60 ℃, adding 3g of 30% hydrogen peroxide solution at a mass concentration, performing vacuum filtration, repeatedly washing with deionized water until the pH of the filtrate of the fiber gel product is neutral, and performing vacuum drying on the fiber gel product for 8 hours at 50-60 ℃ to obtain the bagasse nanofiber. Mixing 7g of bagasse fibers and 2.3g of bagasse nanofibers, adding 100ml of deionized water to prepare a fiber suspension, adding 0.5g of polylactic acid dissolved by 20ml of hexafluoroisopropanol solution into the fiber suspension, stirring for 8 hours, carrying out ultrasonic treatment for 30min, adding 0.2g of bagasse anthocyanin, stirring for 0.5 hour at 45 ℃, casting into a flat-bottom mold, and drying in a drying box at 45 ℃ for 8 hours to obtain the degradable plastic film. The mass fraction of the bagasse anthocyanin added into the degradable plastic film is 2%, the mass fraction of the bagasse fiber is 70%, the mass fraction of the bagasse nanofiber is 23%, and the mass fraction of the polylactic acid is 5%. The tensile strength of the prepared degradable plastic film is 43.5Mpa, then the degradable plastic film is pasted in a box cover filled with the raw crabs, then the box is placed at 25 ℃ for 72 hours, the color of the degradable plastic film is observed to be changed from light pink to brownish green to prove that the raw crabs deteriorate, and then the box is placed for 72 hours to observe that the color of the degradable plastic film is changed from brownish green to blackish green to prove that the raw crabs deteriorate more seriously.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (10)
1. The degradable plastic film is characterized in that the preparation raw materials comprise the following components in percentage by mass: the bagasse consists of, by weight, 2% -5% of bagasse anthocyanin, 70% of bagasse fiber, 17% -23% of bagasse nanofiber and 5% -10% of polylactic acid, wherein the bagasse anthocyanin is extracted from sugarcane peel, the bagasse fiber is prepared from bagasse, the bagasse nanofiber is prepared from bagasse fiber, and the polylactic acid is prepared from sucrose.
2. The preparation method of the degradable plastic film for preserving freshness and visually monitoring the freshness of seafood as claimed in claim 1, is characterized by comprising the following steps:
(1) Drying the sugarcane peel to constant weight, crushing the sugarcane peel into powder after drying, screening the powder with the particle size of 40-60 meshes, mixing the powder with acidified ethanol in a ratio of 1: (20-25), stirring for 1-3 h at 40-50 ℃, carrying out vacuum filtration, carrying out dark rotary evaporation and concentration on the filtrate at 40-50 ℃ to obtain a concentrated solution, and carrying out vacuum freeze drying on the concentrated solution for 24-48 h to obtain the bagasse anthocyanin;
(2) Carrying out anaerobic fermentation on sucrose by using lactobacillus under the conditions that the temperature is 38-42 ℃ and the pH is 5.5-6.5 to obtain fermentation liquor containing lactic acid, adding ethyl acetate into the fermentation liquor containing the lactic acid to extract to obtain extract liquor, distilling the extract liquor under reduced pressure at normal temperature, wherein the undistilled product is the lactic acid, adding a titanium catalyst with the mass fraction of 0.5-2% into the lactic acid, heating to 160-270 ℃, the vacuum degree is 1.33-2.66 kPa, reacting for 18-24 h, then distilling to obtain lactide, mixing the lactide and an organic tin catalyst with the mass fraction of 0.3-0.7%, and reacting for 1-5 h at 180-220 ℃ to obtain polylactic acid;
(3) Drying bagasse, crushing the dried bagasse into bagasse powder, screening the bagasse powder with the particle size of 60-80 meshes, mixing 1 part by mass of the bagasse powder with 0.3-0.5 part by mass of sodium chlorite and 2-4 parts by mass of glacial acetic acid, shaking for 1-2 h at 70-80 ℃, carrying out vacuum filtration to obtain filter residue, preparing 1 part by mass of the filter residue into bagasse fiber slurry with the mass fraction of 4-6%, fluffing the bagasse fiber slurry to obtain bagasse fiber suspension, dispersing the bagasse fiber suspension, filtering to obtain filter residue after dispersion, and drying the filter residue to obtain bagasse fiber;
(4) Mixing the bagasse fiber obtained in the step (3) with potassium permanganate in a ratio of 1: (1.2-1.4), adding a sulfuric acid solution with the mass concentration of 1% -3% to obtain a mixed solution, reacting the mixed solution at 50-60 ℃ for 1-3 h, adding a hydrogen peroxide solution with the mass concentration of 30% to obtain a fiber gel product, carrying out vacuum filtration on the fiber gel product, repeatedly washing the fiber gel product with deionized water until the pH of the filtrate of the fiber gel product is neutral, and carrying out vacuum drying to obtain the bagasse nanofiber;
(5) Mixing bagasse fibers and bagasse nanofibers, adding deionized water to prepare a fiber suspension, adding polylactic acid dissolved by hexafluoroisopropanol into the fiber suspension, stirring for 6-8 hours to obtain a polylactic acid-containing fiber suspension solution, carrying out ultrasonic treatment on the polylactic acid-containing fiber suspension, adding bagasse anthocyanin, stirring for 0.5-1.5 hours at 35-45 ℃, casting onto a flat bottom mold to obtain a visual indication membrane liquid, and drying the visual indication membrane liquid at 35-45 ℃ for 8-12 hours to obtain the degradable plastic membrane.
3. The preparation method of the degradable plastic film for keeping seafood fresh and visually monitoring seafood freshness as claimed in claim 2, wherein in step (1), the sugarcane peels are dried to constant weight in a constant temperature drying oven at 40-50 ℃.
4. The method for preparing the degradable plastic film for preserving freshness and visually monitoring the freshness of seafood as claimed in claim 2, wherein the volume ratio of the acid solution in the acidified ethanol to the ethanol in the step (1) is (1-1.5): 4.
5. the method for preparing the degradable plastic film for preserving freshness and visually monitoring the freshness of seafood as claimed in claim 4, wherein the acid solution is one of acetic acid solution, oxalic acid solution and butyric acid solution, and the concentration of the acid solution is 1mol/L.
6. The preparation method of the degradable plastic film for keeping seafood fresh and visually monitoring seafood freshness as claimed in claim 2, wherein the temperature rise rate in the step (2) is 5 ℃/min;
in the step (3), the defibering rotating speed is 5000-7000 rpm, and the time is 3-5 min; the dispersion rotating speed is 20000-30000 rpm, and the time is 2-4 min; the drying temperature is 105 ℃ and the drying time is 6h.
7. The preparation method of the degradable plastic film for preserving freshness and visually monitoring the freshness of seafood as claimed in claim 2, wherein the mass ratio of the bagasse fiber to the sulfuric acid solution in the step (4) is 1: (35-45).
8. The preparation method of the degradable plastic film for preserving freshness and visually monitoring the freshness of seafood as claimed in claim 2, wherein the mass ratio of the bagasse fiber to the hydrogen peroxide solution in the step (4) is 1: (1-3).
9. The preparation method of the degradable plastic film for keeping seafood fresh and visually monitoring seafood freshness as claimed in claim 2, wherein the vacuum drying temperature in the step (4) is 50-60 ℃ and the time is 8h.
10. The preparation method of the degradable plastic film for keeping seafood fresh and visually monitoring seafood freshness as claimed in claim 2, wherein the ultrasonic treatment time in the step (5) is 30min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210165053.3A CN114539799B (en) | 2022-02-22 | 2022-02-22 | Degradable plastic film with functions of preserving freshness and visually monitoring freshness of seafood and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210165053.3A CN114539799B (en) | 2022-02-22 | 2022-02-22 | Degradable plastic film with functions of preserving freshness and visually monitoring freshness of seafood and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114539799A CN114539799A (en) | 2022-05-27 |
| CN114539799B true CN114539799B (en) | 2023-03-24 |
Family
ID=81677730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210165053.3A Active CN114539799B (en) | 2022-02-22 | 2022-02-22 | Degradable plastic film with functions of preserving freshness and visually monitoring freshness of seafood and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114539799B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104725804A (en) * | 2015-03-31 | 2015-06-24 | 苏州维泰生物技术有限公司 | Polylactic acid-fir powder-bamboo fiber composite material and preparation method thereof |
| CN108752623A (en) * | 2018-05-04 | 2018-11-06 | 广东省生物工程研究所（广州甘蔗糖业研究所） | The preparation method of polyvinyl alcohol/bagasse nano-cellulose aerogel |
| CN109808254A (en) * | 2018-12-10 | 2019-05-28 | 中国农业科学院农产品加工研究所 | A kind of composite membrane and its preparation method and application with early warning and sterilizing function |
| CN113045802A (en) * | 2021-03-17 | 2021-06-29 | 江南大学 | Edible blueberry anthocyanin composite film and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013519736A (en) * | 2010-02-11 | 2013-05-30 | エフピーイノベイションズ | Nanocomposite biomaterial of nanocrystalline cellulose (NCC) and polylactic acid (PLA) |
| US10400128B2 (en) * | 2013-03-14 | 2019-09-03 | Oregon State University | Nano-cellulose edible coatings and uses thereof |
| US11306186B2 (en) * | 2017-05-02 | 2022-04-19 | Shanghai Ocean University | Method for preparing intelligent antibacterial and antioxidative film |
-
2022
- 2022-02-22 CN CN202210165053.3A patent/CN114539799B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104725804A (en) * | 2015-03-31 | 2015-06-24 | 苏州维泰生物技术有限公司 | Polylactic acid-fir powder-bamboo fiber composite material and preparation method thereof |
| CN108752623A (en) * | 2018-05-04 | 2018-11-06 | 广东省生物工程研究所（广州甘蔗糖业研究所） | The preparation method of polyvinyl alcohol/bagasse nano-cellulose aerogel |
| CN109808254A (en) * | 2018-12-10 | 2019-05-28 | 中国农业科学院农产品加工研究所 | A kind of composite membrane and its preparation method and application with early warning and sterilizing function |
| CN113045802A (en) * | 2021-03-17 | 2021-06-29 | 江南大学 | Edible blueberry anthocyanin composite film and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| A colorimetric film based on polyvinyl alcohol/sodium carboxymethyl cellulose incorporated with red cabbage anthocyanin for monitoring pork freshness;Danfei Liu等;《FOOD PACKAGING AND SHELF LIFE》;第28卷;正文全文 * |
| Development of pH indicator and antimicrobial cellulose nanofibre packaging film based on purple sweet potato anthocyanin and oregano essential oil;Shunli Chen等;《International journal of biological macromolecules》;第149卷;第271-280页 * |
| 花青素基纳米纤维标签的制备及可视化监测羊肉新鲜度;孙武亮;《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》(第02期);B024-732 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114539799A (en) | 2022-05-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103422379B (en) | A kind of preparation method of bagasse cellulose nanofiber membrane | |
| CN101811596B (en) | Edible polysaccharide-protein composite packaging film and preparation method thereof | |
| CN104987516B (en) | A kind of nano-cellulose strengthens the preparation method of tara gum substrate pH intelligent response film | |
| CN108219497A (en) | A kind of preparation method of biodegradation type agricultural mulching | |
| CN103387689A (en) | Method for preparing nanocellulose fiber optical transparent membrane material from peanut hulls | |
| CN103859422A (en) | Production method of banana flower soluble dietary fiber | |
| CN108395724A (en) | A kind of preparation method of tea grounds/cellulose preservative film | |
| Halloub et al. | Stable smart packaging betalain-based from red prickly pear covalently linked into cellulose/alginate blend films | |
| CN114539799B (en) | Degradable plastic film with functions of preserving freshness and visually monitoring freshness of seafood and preparation method thereof | |
| CN103627523A (en) | Sun-cured red tobacco leaf extract, preparation method therefor and applications thereof in cigarettes | |
| Suwanprateep et al. | Structure and thermal properties of rice starch-based film blended with mesocarp cellulose fiber | |
| CN110016832A (en) | A kind of preparation method of high intensity high-hydroscopicity knitting paper for handicraft articles | |
| CN105440323B (en) | Purple potato starch edible film and preparation method thereof | |
| CN107353352A (en) | A kind of preparation method of nano-cellulose, nano-cellulose and water purification film, the preparation method of water purification film | |
| CN108570156B (en) | Vegetable-flavor bacterial cellulose-based edible seasoning packaging film and preparation method and application thereof | |
| CN105002231A (en) | Method for preparing bacterial cellulose by biotransforming mulberry leaves | |
| Brant et al. | Cellulose nanoparticles extracted from sugarcane bagasse and their use in biodegradable recipients for improving physical properties and water barrier of the latter | |
| CN113080251B (en) | Edible composite coating material and preparation method thereof | |
| CN102838693A (en) | Method for separating and purifying straight-chain hemicellulose and branched-chain hemicellulose from biomass | |
| CN113402734B (en) | Preparation method and application of hydrogel for indicating freshness of chilled meat | |
| CN112772714B (en) | Composite preservative film and preparation method and application thereof | |
| CN107937196A (en) | A kind of brewing method with ice brewing grape dry type wine | |
| CN108193297B (en) | Sorghum husk polyphenol dyed fiber and preparation method thereof | |
| CN103774479B (en) | NMMO/DMSO mixed solvent is utilized to extract the method for biomass cellulose | |
| CN103583932A (en) | Natural film coating agent applied to food and healthcare products |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240131 Address after: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee after: Dragon totem Technology (Hefei) Co.,Ltd. Country or region after: China Address before: 710021 Shaanxi province Xi'an Weiyang University Park Patentee before: SHAANXI University OF SCIENCE & TECHNOLOGY Country or region before: China |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240219 Address after: No.898 Huangjiao Road, Huangyan District, Taizhou City, Zhejiang Province 318020 Patentee after: Zhejiang Fengtai Technology Co.,Ltd. Country or region after: China Address before: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee before: Dragon totem Technology (Hefei) Co.,Ltd. Country or region before: China |