CN114908611A - Intelligent paper package coating method with pH sensitivity and intelligent paper package - Google Patents

Intelligent paper package coating method with pH sensitivity and intelligent paper package Download PDF

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Publication number
CN114908611A
CN114908611A CN202210458075.9A CN202210458075A CN114908611A CN 114908611 A CN114908611 A CN 114908611A CN 202210458075 A CN202210458075 A CN 202210458075A CN 114908611 A CN114908611 A CN 114908611A
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China
Prior art keywords
chitosan
oxidized starch
powder
solution
intelligent
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Pending
Application number
CN202210458075.9A
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Chinese (zh)
Inventor
杨汝倩
刘磊
姚未磊
宋立合
王剑
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Shenzhen Mys Environmental Protection and Technology Co Ltd
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Shenzhen Mys Environmental Protection and Technology Co Ltd
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Priority to CN202210458075.9A priority Critical patent/CN114908611A/en
Publication of CN114908611A publication Critical patent/CN114908611A/en
Pending legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/10—Packing paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/14—Carboxylic acids; Derivatives thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • 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

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  • Paper (AREA)
  • General Preparation And Processing Of Foods (AREA)

Abstract

The invention provides an intelligent paper package coating method with pH sensitivity, which comprises the following steps: s1, preparing a composite coating liquid by adopting a mixing method for oxidized starch powder, chitosan powder and anthocyanin powder; and S2, coating the prepared composite coating liquid on a paperboard. The invention has the beneficial effects that: the research on adding chitosan as an additive into oxidized starch and directly using chitosan as a coating saves the cost; the paperboard package has pH sensitivity, and the deterioration of packaged food can be identified.

Description

Intelligent paper package coating method with pH sensitivity and intelligent paper package
Technical Field
The invention relates to packaging, in particular to an intelligent paper packaging coating method with pH sensitivity and an intelligent paper packaging.
Background
At present, in addition to the traditional "seeing" and "smelling", the method for determining whether food is rotten or not also includes a food deterioration detection technology based on image recognition, and a very weak light detection technology for determining the deterioration degree of food. These methods, while useful, all have their limitations. The traditional identification method is not accurate enough, and the package needs to be opened for close-range observation; most of microbial observation methods have high technical requirements and high cost, and are not put into production on a large scale for a while. According to the data, different microorganisms have different requirements on pH in different growth environments at different growth stages, the pH value of the food can be changed due to the growth of the microorganisms in the food, and the food is mostly rotten when the pH value of the food is changed, so that whether the specific food is rotten or not can be shown by the change of the pH value of the food. The fresh-keeping method of pH sensitivity on the market is to directly coat fresh-keeping liquid on fresh to form a fresh-keeping film, but the method has complex operation and high manufacturing cost, and is not suitable for storage and transportation of large-scale products. Meanwhile, the global economy and industry system is creating the ideas of 'zero package', 'simplified package', 'green package' leading from the package revolution, and putting into practice, and green goods and green packages become hot spots in the packaging industry. The execution of the plastic-limiting order also enables the proportion of paper packages in the life of people to be larger and larger, and the paper packages are gradually applied to food packages besides the traditional transportation packages. In conclusion, the development of the intelligent paper package with pH sensitivity has great significance for the packaging industry.
Chitosan is a deacetylated product of chitosan, and has great potential for improving paper quality and meeting the printing requirement, so in recent years, development and application of chitosan in paper packaging are more and more emphasized by people. The anthocyanin is used as a novel natural biological preservative, has strong antibacterial capability, is nontoxic and can resist high temperature, so the anthocyanin is applied to the food industry field of a plurality of countries with developed economy at present. Meanwhile, the pH sensitivity of the anthocyanin enables the anthocyanin to have a large application space in intelligent packaging, but the price of chitosan and the anthocyanin is higher, so that the production cost is higher.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an intelligent paper package coating method with pH sensitivity and an intelligent paper package.
The invention provides an intelligent paper package coating method with pH sensitivity, which comprises the following steps:
s1, preparing a composite coating liquid by mixing the oxidized starch powder, the chitosan powder and the anthocyanin powder;
and S2, coating the prepared composite coating liquid on a paperboard.
As a further improvement of the present invention, step S1 includes the following sub-steps:
s101, stirring and mixing oxidized starch powder and deionized water to fully gelatinize the oxidized starch powder to prepare an oxidized starch solution;
s102, stirring and mixing chitosan powder and acetic acid water solution to completely dissolve the chitosan powder to prepare chitosan solution;
s103, mixing the prepared oxidized starch solution and the chitosan solution to prepare a mixed solution;
and S104, adding anthocyanin into the mixed solution, stirring and mixing to prepare the composite coating liquid.
As a further improvement of the present invention, in step S101, the oxidized starch powder is stirred and mixed with deionized water to fully gelatinize the oxidized starch powder, and an oxidized starch solution with a concentration of 4% is prepared.
As a further improvement of the invention, in step S101, the oxidized starch powder and deionized water are stirred for 20 minutes at 60-80 ℃ by a magnetic stirrer, so that the oxidized starch powder is fully gelatinized, and an oxidized starch solution with the concentration of 4% is prepared.
As a further improvement of the present invention, in step S102, chitosan powder is mixed with an acetic acid aqueous solution with stirring, so that the chitosan powder is completely dissolved, and a chitosan solution with a concentration of 1% is prepared.
As a further modification of the present invention, in step S102, chitosan powder is stirred with a 1% concentration acetic acid aqueous solution by a magnetic stirrer for 3 to 5 hours to completely dissolve the chitosan powder, preparing a 1% concentration chitosan solution.
As a further improvement of the present invention, in step S103, the prepared oxidized starch solution and the chitosan solution are mixed so that the content of oxidized starch in the mixed solution is 0.8% to 1.3%, and the content of chitosan in the mixed solution is 50% to 100% of the content of oxidized starch.
As a further improvement of the present invention, in step S104, anthocyanin with a chitosan content of 3% to 5% is added to the mixed solution.
As a further improvement of the invention, in step S104, anthocyanin with the chitosan content of 3% -5% is added into the mixed solution, and the mixture is stirred for 1 hour under a magnetic stirrer to be completely mixed to form the composite coating liquid.
As a further improvement of the invention, in step S2, the formed composite coating liquid is coated on the paperboard by screen printing, so that the coating weight is 2-5g/m 2 。
The invention also provides an intelligent paper package which is prepared by adopting the method in any one of the above steps.
The invention has the beneficial effects that:
1. the carton coated with the composite coating has pH sensitivity, can indicate the acid-base change of a packing material, can identify the deterioration of packaged food, and can reduce the safety problem caused by the deterioration of the food;
2. the printing oil is the original production process, the additional production cost is not increased, the human resource cost is saved, the production efficiency can be improved, and the mass production is realized;
3. the research shows that the chitosan is used as an additive to be added into the oxidized starch and is directly used as a coating, so that the cost is saved;
4. the formula is simple, the raw materials are environment-friendly and safe, excessive additives are not contained, and the preparation method is simple to operate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other solutions can be obtained according to the drawings without inventive efforts.
Fig. 1 is a flow chart of a smart paper packaging coating process with pH sensitivity according to the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience in describing the present invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the scope of the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The invention is further described with reference to the following description and embodiments in conjunction with the accompanying drawings.
As shown in figure 1, the intelligent paper packaging coating method with pH sensitivity combines chitosan with good paper coating performance, oxidized starch and anthocyanin capable of being used as a sensitive pH indicator to synthesize a polymer by a casting method to be used as a coating, and the polymer is coated on a paperboard by a screen printing mode. And selecting a proper evaluation index, testing and evaluating the pH sensitivity and the mechanical property of the paperboard, and determining the optimal proportion of each material to ensure that the paperboard has better paper performance and pH sensitivity.
The main material is oxidized starch powder, chitosan powder and anthocyanin powder, and the composite coating liquid is prepared by adopting a mixing method, and the specific steps are as follows:
1. stirring the oxidized starch powder and deionized water at 60-80 ℃ for 20min by a magnetic stirrer to fully gelatinize the oxidized starch and prepare an oxidized starch solution with the concentration of 4%;
2. because the chitosan is insoluble in water and soluble in acid, stirring chitosan powder and 1% acetic acid aqueous solution for 3-5h by a magnetic stirrer to completely dissolve the chitosan to prepare a 1% chitosan solution;
3. the prepared oxidized starch solution and the chitosan solution are mixed, so that the content of starch in the mixed solution is 0.8-1.3%, the concentration of the composite coating liquid is ensured, the viscosity of the composite coating liquid is proper, and the coating effect is ensured. Meanwhile, the content of chitosan in the mixed solution is 50% -100% of the content of oxidized starch, so that the coating solution can effectively improve the performance of paper.
4. Anthocyanin with the chitosan content of 3% -5% is added into the mixed solution, so that the coating liquid has pH sensitivity, and the paper improvement performance of the composite coating liquid can be improved. And finally, stirring for 1 hour under a magnetic stirrer to completely mix the components to form the composite coating liquid.
5. Coating the formed composite coating liquid on a paperboard in a screen printing mode to ensure that the coating weight is 2-5g/m 2 So that the coated paperboard has excellent pH sensitivity and physical properties, thereby obtaining the pH-sensitive carton.
The intelligent paper package coating method with pH sensitivity and the intelligent paper package provided by the invention combine the common coating component, namely oxidized starch, in the packaging industry, have low price and can effectively improve the product performance. The application of the composite coating on the printing paper can not only enable the paperboard or the carton to have good physical property and barrier property, enable the paperboard or the carton to have higher surface strength and internal strength, higher surface energy and uniform microporous structure, but also timely reflect the acid-base change of a packaged product, know the spoilage condition of the packaged product, reduce the food safety problem caused by food spoilage, and promote the implementation of a green environment-friendly packaging policy.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims (10)

1. An intelligent paper package coating method with pH sensitivity is characterized by comprising the following steps:
s1, preparing a composite coating liquid by mixing the oxidized starch powder, the chitosan powder and the anthocyanin powder;
and S2, coating the prepared composite coating liquid on a paperboard.
2. The intelligent pH-sensitive paper packaging coating method of claim 1, wherein step S1 includes the following substeps:
s101, stirring and mixing oxidized starch powder and deionized water to fully gelatinize the oxidized starch powder to prepare an oxidized starch solution;
s102, stirring and mixing chitosan powder and acetic acid aqueous solution to completely dissolve the chitosan powder to prepare chitosan solution;
s103, mixing the prepared oxidized starch solution and the chitosan solution to prepare a mixed solution;
and S104, adding anthocyanin into the mixed solution, stirring and mixing to prepare the composite coating liquid.
3. The intelligent pH-sensitive paper packaging coating process of claim 2, characterized in that: in step S101, the oxidized starch powder is stirred and mixed with deionized water to sufficiently gelatinize the oxidized starch powder, and an oxidized starch solution with a concentration of 4% is prepared.
4. The smart paper packaging coating process with pH sensitivity of claim 3, characterized in that: in step S101, the oxidized starch powder and deionized water are stirred for 20 minutes at 60 ℃ to 80 ℃ by a magnetic stirrer, so that the oxidized starch powder is fully gelatinized, and an oxidized starch solution with a concentration of 4% is prepared.
5. The intelligent pH-sensitive paper packaging coating process of claim 2, characterized in that: in step S102, chitosan powder is stirred and mixed with an acetic acid aqueous solution to completely dissolve the chitosan powder, and a chitosan solution with a concentration of 1% is prepared in step S102.
6. The intelligent pH-sensitive paper packaging coating process of claim 5, wherein: in step S102, the chitosan powder is stirred with a 1% concentration acetic acid aqueous solution for 3 to 5 hours by a magnetic stirrer to completely dissolve the chitosan powder, preparing a 1% concentration chitosan solution.
7. The intelligent pH-sensitive paper packaging coating process of claim 2, characterized in that: in step S103, the prepared oxidized starch solution and the chitosan solution are mixed so that the content of oxidized starch in the mixed solution is 0.8% to 1.3%, and the content of chitosan in the mixed solution is 50% to 100% of the content of oxidized starch.
8. The intelligent pH-sensitive paper packaging coating process of claim 2, characterized in that: in step S104, anthocyanidin having a chitosan content of 3% to 5% is added to the mixed solution.
9. The intelligent pH-sensitive paper packaging coating process of claim 1, wherein: in step S2, the composite coating liquid is formed and coated on the paperboard by screen printing, and the coating weight is 2 g/m 2 -5g/m 2 。
10. The utility model provides an intelligence paper packing which characterized in that: the smart paper packaging is prepared by the method of any one of claims 1 to 9.
CN202210458075.9A 2022-04-28 2022-04-28 Intelligent paper package coating method with pH sensitivity and intelligent paper package Pending CN114908611A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104831585A (en) * 2015-05-26 2015-08-12 南京大学（苏州）高新技术研究院 Multi-effect mixed biological preservative paper and using method thereof for juicy peaches
CN105297549A (en) * 2015-10-13 2016-02-03 广东轻工职业技术学院 Bacteriostatic paper containing radix curcuma and preparation method and application of bacteriostatic paper
KR20170047714A (en) * 2015-10-23 2017-05-08 이동찬 Konjac composition containing anthocyanin and chitosan and method of manufacturing thereof
CH712036A2 (en) * 2016-01-08 2017-07-14 Univ Jiangnan Method for displaying the carbon dioxide of a freshly cut climacteric fruit or vegetable.
KR20170087317A (en) * 2016-01-20 2017-07-28 고려대학교 산학협력단 pH indicator film comprising natural anthocyanin and biopolymer, and method for preparing the same
CN109258645A (en) * 2018-09-29 2019-01-25 山东祥维斯生物科技股份有限公司 A kind of anti-bacterial refreshing gel and preparation method thereof containing glycine betaine
CN113968986A (en) * 2021-11-09 2022-01-25 浙江工商大学 Preparation method of purple cabbage anthocyanin-collagen chitosan composite intelligent membrane

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104831585A (en) * 2015-05-26 2015-08-12 南京大学（苏州）高新技术研究院 Multi-effect mixed biological preservative paper and using method thereof for juicy peaches
CN105297549A (en) * 2015-10-13 2016-02-03 广东轻工职业技术学院 Bacteriostatic paper containing radix curcuma and preparation method and application of bacteriostatic paper
KR20170047714A (en) * 2015-10-23 2017-05-08 이동찬 Konjac composition containing anthocyanin and chitosan and method of manufacturing thereof
CH712036A2 (en) * 2016-01-08 2017-07-14 Univ Jiangnan Method for displaying the carbon dioxide of a freshly cut climacteric fruit or vegetable.
KR20170087317A (en) * 2016-01-20 2017-07-28 고려대학교 산학협력단 pH indicator film comprising natural anthocyanin and biopolymer, and method for preparing the same
CN109258645A (en) * 2018-09-29 2019-01-25 山东祥维斯生物科技股份有限公司 A kind of anti-bacterial refreshing gel and preparation method thereof containing glycine betaine
CN113968986A (en) * 2021-11-09 2022-01-25 浙江工商大学 Preparation method of purple cabbage anthocyanin-collagen chitosan composite intelligent membrane

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