CN114149604B - Near-infrared light response type slow-release composite packaging film and preparation method and application thereof - Google Patents
Near-infrared light response type slow-release composite packaging film and preparation method and application thereof Download PDFInfo
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- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
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- B65D65/38—Packaging materials of special type or form
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- B65D65/463—Edible packaging materials
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- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
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- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
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- C08J2405/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2401/00 or C08J2403/00
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- C08J2405/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2401/00 or C08J2403/00
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Abstract
The invention provides a near-infrared light response type slow-release composite packaging film and a preparation method and application thereof. According to the actual use condition, the microsphere shell in the inner layer of the composite film is dissociated through external near-infrared irradiation after the food is packaged, so that active substances are released, the controllable release of fresh-keeping active ingredients is realized, and the food fresh-keeping period can be greatly prolonged when the composite film is used for food fresh keeping.
Description
Technical Field
The invention belongs to the technical field of composite films, and particularly relates to a near-infrared light response type slow-release composite packaging film and a preparation method and application thereof.
Background
The active food packaging film can release antibacterial agent and antioxidant, and can prolong shelf life of food. At present, the release of active substances in the active food packaging film is not controlled, the film is in a release state after being prepared, the film needs to be used for food packaging as soon as possible, or else, the active ingredients in the film are gradually reduced along with the prolonging of time, the fresh-keeping effect is poor, and even no fresh-keeping effect exists.
Under the action of near infrared light, the structure of o-nitrobenzyl ester can undergo photocleavage and is often used as a carrier of photoresponse drugs. The structure of o-nitrobenzyl ester is connected with hydrophilic polyethylene glycol and hydrophobic long-chain alkane, so that the near-infrared light response amphiphilic polymer can be obtained. The near-infrared light response type slow-release composite packaging film is obtained by taking the near-infrared light response amphiphilic polymer as an emulsifier, wrapping the hydrophobic food preservative to obtain controllable-release microspheres, adding the microspheres into an edible film material, and spraying the microspheres on the surface of a traditional polymer film.
Disclosure of Invention
Aiming at the defects of the active food packaging film in the prior art, the invention provides a near-infrared light response type slow-release composite packaging film and a preparation method and application thereof.
The invention provides a near-infrared light response type slow-release composite packaging film, which has a two-layer structure, wherein the outer layer is a polymer film, and the inner layer is an edible film containing near-infrared light response dissociation microspheres.
Preferably, the polymer film is selected from one or more of polyethylene, polypropylene, polystyrene, polyethylene terephthalate, polylactic acid and poly-beta-hydroxybutyric acid.
Preferably, the base material of the edible film is selected from one or more of gelatin, pectin, sodium alginate, glucan, agar and acacia.
Preferably, the food preservative is arranged inside the near-infrared light response dissociation microsphere, and the amphiphilic polymer with a molecular main chain containing an o-nitrobenzyl ester structure is arranged outside the near-infrared light response dissociation microsphere.
More preferably, the food preservative is one or a combination of more than two of clove essential oil, cinnamon essential oil, perilla essential oil, citronella essential oil and lemon essential oil.
More preferably, the amphiphilic polymer containing an o-nitrobenzyl ester structure in the molecular main chain has a molecular structure as shown in chemical formula 1:
in chemical formula 1, m is an integer of 4 to 18, and n is an integer of 20 to 100.
The second aspect of the invention provides a preparation method of the near-infrared light response type slow-release composite packaging film, which comprises the following steps:
(1) Preparation of microsphere suspension: adding the food preservative and the amphiphilic polymer containing the o-nitrobenzyl ester structure into deionized water, and carrying out high-speed homogenization to obtain a microsphere suspension wrapping the food preservative;
(2) Preparation of the spray solution: dissolving the base material of the edible film in deionized water, then adding the microsphere suspension, and uniformly stirring;
(3) Preparing a composite packaging film: and carrying out corona treatment on the polymer film, then spraying the spraying solution on the corona treatment surface of the polymer film, and drying at 40-60 ℃ by using a blast oven to obtain the near-infrared light response type slow-release composite packaging film.
Preferably, in the step (1), the weight ratio of the food preservative, the amphiphilic polymer and the deionized water is 1:2-5:20-50.
preferably, in the step (2), the weight ratio of the deionized water to the substrate of the edible film to the microsphere suspension is 50-100:5-20:2.
the third aspect of the invention provides an application of the near-infrared light response type slow-release composite packaging film in food preservation.
Compared with the prior art, the near-infrared light response type slow-release composite packaging film is prepared by wrapping the food preservative with the amphiphilic polymer containing the o-nitrobenzyl ester structure, and the microsphere shell in the inner layer of the composite film is dissociated to release active substances through external near-infrared light irradiation after the food is packaged according to actual use conditions, so that the controllable release of the fresh-keeping active ingredients is realized, and the food preservation period can be greatly prolonged when the near-infrared light response type slow-release composite packaging film is used for preserving the food.
Drawings
Fig. 1 is a schematic structural diagram of a near-infrared light responsive slow-release composite packaging film in an embodiment.
Detailed Description
The near-infrared light response type slow-release composite packaging film provided in the following examples has a two-layer structure, wherein the outer layer is a polymer film, and the inner layer is an edible film containing near-infrared light response dissociation microspheres (as shown in fig. 1); wherein:
the polymer film can be selected from one or the combination of more than two of polyethylene, polypropylene, polystyrene, polyethylene terephthalate, polylactic acid and poly-beta-hydroxybutyric acid; the edible film base material can be selected from one or more of gelatin, pectin, sodium alginate, dextran, agar, and acacia; the near infrared light response dissociation microsphere is internally provided with a food preservative, the outside is an amphiphilic polymer with a molecule main chain containing an o-nitrobenzyl ester structure, the food preservative can be selected from one or a combination of more than two of clove essential oil, cinnamon essential oil, perilla essential oil, citronella essential oil and lemon essential oil, and the amphiphilic polymer with the molecule main chain containing the o-nitrobenzyl ester structure has a molecular structure shown in a chemical formula 1:
in chemical formula 1, m is an integer of 4 to 18, and n is an integer of 20 to 100.
The near-infrared light response type slow-release composite packaging film is prepared in the following examples by the following method:
(1) Preparation of microsphere suspension: adding the food preservative and the amphiphilic polymer containing the o-nitrobenzyl ester structure into deionized water, and carrying out high-speed homogenization to obtain a microsphere suspension wrapping the food preservative; wherein the weight ratio of the food preservative to the amphiphilic polymer to the deionized water is 1:2-5:20-50 parts of;
(2) Preparation of the spray solution: dissolving the base material of the edible film in deionized water, then adding the microsphere suspension, and uniformly stirring; wherein the weight ratio of the deionized water to the base material of the edible film to the microsphere suspension is 50-100:5-20:2;
(3) Preparing a composite packaging film: and carrying out corona treatment on the polymer film, then spraying the spraying solution on the corona treatment surface of the polymer film, and drying at 40-60 ℃ by using a blast oven to obtain the near-infrared light response type slow-release composite packaging film.
The present invention will be further described with reference to the following examples.
Example 1
The embodiment provides a preparation method of a near-infrared light response type slow-release composite packaging film, which specifically comprises the following steps:
(1) Adding 1 g of clove essential oil and 2 g of amphiphilic polymer (m =4, n = 100) containing an o-nitrobenzyl ester structure into 50 g of deionized water, and performing high-speed homogenization to obtain a microsphere suspension wrapping the clove essential oil;
(2) Dissolving 5 g of gelatin in 100 g of deionized water, then adding 2 g of microsphere suspension, and uniformly stirring;
(3) And carrying out corona treatment on the polyethylene film, then spraying the spraying solution on the corona treatment surface of the polymer film, and drying at 40 ℃ by using a blast oven to obtain the near-infrared light response type slow-release composite packaging film.
The near-infrared light response type slow-release composite packaging film is used for containing tomatoes, and then the inner clove essential oil is released by utilizing the near-infrared light activation, so that the preservation period of the tomatoes can be prolonged by 5 days compared with a polyethylene film.
Example 2
The embodiment provides a preparation method of a near-infrared light response type slow-release composite packaging film, which specifically comprises the following steps:
(1) Adding 1 g of cinnamon essential oil and 5 g of amphiphilic polymer (m =18, n = 20) containing an o-nitrobenzyl ester structure into 30 g of deionized water, and carrying out high-speed homogenization to obtain a microsphere suspension wrapping the cinnamon essential oil;
(2) Dissolving 20 g of pectin in 80 g of deionized water, adding 2 g of microsphere suspension, and uniformly stirring;
(3) And carrying out corona treatment on the polylactic acid film, then spraying the spraying solution on the corona treatment surface of the polymer film, and drying at 60 ℃ by using a blast oven to obtain the near-infrared light response type slow-release composite packaging film.
The orange is contained in the near-infrared light response type slow-release composite packaging film, and then the orange is activated by near-infrared light to release the cinnamon essential oil inside, so that the freshness date of the orange can be prolonged by 20 days compared with that of a polylactic acid film.
Example 3
The embodiment provides a preparation method of a near-infrared light response type slow-release composite packaging film, which specifically comprises the following steps:
(1) Adding 1 g of lemon essential oil and 3 g of amphiphilic polymer (m =10, n = 50) containing an o-nitrobenzyl ester structure into 20 g of deionized water, and carrying out high-speed homogenization to obtain a microsphere suspension wrapping the lemon essential oil;
(2) Dissolving 10 g of pectin in 50 g of deionized water, then adding 2 g of microsphere suspension, and uniformly stirring;
(3) And carrying out corona treatment on the polypropylene film, then spraying the spraying solution on the corona treatment surface of the polymer film, and drying at 50 ℃ by using a blast oven to obtain the near-infrared light response type slow-release composite packaging film.
The near-infrared light response type slow-release composite packaging film is used for containing lettuce, then near-infrared light is used for activation, internal lemon essential oil is released, and compared with a polypropylene film, the preservation period of the lettuce can be prolonged by 10 days.
Example 4
The embodiment provides a preparation method of a near-infrared light response type slow-release composite packaging film, which specifically comprises the following steps:
(1) Adding 1 g of perilla essential oil and 4 g of amphiphilic polymer (m =15, n = 70) containing an o-nitrobenzyl ester structure into 40 g of deionized water, and performing high-speed homogenization to obtain a microsphere suspension wrapping the perilla essential oil;
(2) Dissolving 15 g of sodium alginate in 80 g of deionized water, then adding 2 g of microsphere suspension, and uniformly stirring;
(3) And carrying out corona treatment on the polyethylene terephthalate film, then spraying the spraying solution on the corona treatment surface of the polymer film, and drying at 60 ℃ by using a blast oven to obtain the near-infrared light response type slow-release composite packaging film.
The strawberry is contained in the near-infrared light response type slow-release composite packaging film, then the near-infrared light is used for activation, the internal perilla essential oil is released, and compared with a polyethylene glycol terephthalate film, the strawberry fresh-keeping period can be prolonged by 8 days.
The embodiments described above are presented to facilitate one of ordinary skill in the art to make and use the invention. It will be apparent to those skilled in the art that various modifications to these embodiments can be readily made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments. Those skilled in the art should appreciate that many modifications and variations are possible in light of the above teaching without departing from the scope of the invention.
Claims (6)
1. A near-infrared light response type slow-release composite packaging film is characterized by having a two-layer structure, wherein the outer layer is a polymer film, and the inner layer is an edible film containing near-infrared light response dissociation microspheres;
the base material of the edible film is selected from one or the combination of more than two of gelatin, pectin, sodium alginate, glucan, agar and Arabic gum;
the inside of the near-infrared light response dissociation microsphere is a food preservative, and the outside is an amphiphilic polymer with a molecular main chain containing an o-nitrobenzyl ester structure; wherein: the food preservative is selected from one or a combination of more than two of clove essential oil, cinnamon essential oil, perilla essential oil, citronella essential oil and lemon essential oil, and the amphiphilic polymer containing an o-nitrobenzyl ester structure in a molecular main chain has a molecular structure as shown in a chemical formula 1:
in chemical formula 1, m is an integer of 4 to 18, and n is an integer of 20 to 100.
2. The near-infrared light-responsive slow-release composite packaging film according to claim 1, wherein the polymer film is one or a combination of two or more of polyethylene, polypropylene, polystyrene, polyethylene terephthalate, polylactic acid and poly-beta-hydroxybutyric acid.
3. The preparation method of the near-infrared light response type slow-release composite packaging film of claim 1 or 2, which is characterized by comprising the following steps:
(1) Preparation of microsphere suspension: adding the food preservative and the amphiphilic polymer containing the o-nitrobenzyl ester structure into deionized water, and performing high-speed homogenization to obtain a microsphere suspension wrapping the food preservative;
(2) Preparation of the spray solution: dissolving the base material of the edible film in deionized water, then adding the microsphere suspension, and uniformly stirring;
(3) Preparing a composite packaging film: and carrying out corona treatment on the polymer film, then spraying the spraying solution on the corona treatment surface of the polymer film, and drying at 40-60 ℃ by using a blast oven to obtain the near-infrared light response type slow-release composite packaging film.
4. The preparation method of the near-infrared light responsive slow-release composite packaging film according to claim 3, wherein in the step (1), the weight ratio of the food preservative to the amphiphilic polymer to the deionized water is 1:2-5:20-50.
5. the method for preparing the near-infrared light responsive slow-release composite packaging film according to claim 3, wherein in the step (2), the weight ratio of the deionized water to the base material of the edible film to the microsphere suspension is 50-100:5-20:2.
6. the use of the near-infrared light responsive slow release composite packaging film of claim 1 or 2 in food preservation.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH059107A (en) * | 1991-06-28 | 1993-01-19 | Noevir Co Ltd | Photo-responsive microcapsule, and cosmetic and medicine for external application formulated therewith |
| CN111533848A (en) * | 2020-06-18 | 2020-08-14 | 中国热带农业科学院南亚热带作物研究所 | Photothermal dual-responsive chitosan derivative, and preparation method and application thereof |
| CN111995785A (en) * | 2020-09-08 | 2020-11-27 | 上海海洋大学 | Response type slow-release active packaging film and preparation method and application thereof |
| CN113698646A (en) * | 2021-08-27 | 2021-11-26 | 江南大学 | Transparent moisture-preserving antibacterial degradable packaging film and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2627648C (en) * | 2005-10-28 | 2013-10-29 | Solarbre, Inc. | Photo-responsive microencapsulation materials, compositions and methods of use thereof |
| CN110202860B (en) * | 2019-05-31 | 2021-04-23 | 华南农业大学 | Gradient slow-release type active composite membrane and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH059107A (en) * | 1991-06-28 | 1993-01-19 | Noevir Co Ltd | Photo-responsive microcapsule, and cosmetic and medicine for external application formulated therewith |
| CN111533848A (en) * | 2020-06-18 | 2020-08-14 | 中国热带农业科学院南亚热带作物研究所 | Photothermal dual-responsive chitosan derivative, and preparation method and application thereof |
| CN111995785A (en) * | 2020-09-08 | 2020-11-27 | 上海海洋大学 | Response type slow-release active packaging film and preparation method and application thereof |
| CN113698646A (en) * | 2021-08-27 | 2021-11-26 | 江南大学 | Transparent moisture-preserving antibacterial degradable packaging film and preparation method and application thereof |
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