CN114657815A - Preparation method of green degradable antibacterial paper with bioactive coating for fruit cultivation bag - Google Patents

Preparation method of green degradable antibacterial paper with bioactive coating for fruit cultivation bag Download PDF

Info

Publication number
CN114657815A
CN114657815A CN202210305061.3A CN202210305061A CN114657815A CN 114657815 A CN114657815 A CN 114657815A CN 202210305061 A CN202210305061 A CN 202210305061A CN 114657815 A CN114657815 A CN 114657815A
Authority
CN
China
Prior art keywords
paper
coating
antibacterial
solution
fruit
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.)
Granted
Application number
CN202210305061.3A
Other languages
Chinese (zh)
Other versions
CN114657815B (en
Inventor
邵平
余佳浩
徐山林
潘杰锋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang University of Technology ZJUT
Original Assignee
Zhejiang University of Technology ZJUT
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhejiang University of Technology ZJUT filed Critical Zhejiang University of Technology ZJUT
Priority to CN202210305061.3A priority Critical patent/CN114657815B/en
Publication of CN114657815A publication Critical patent/CN114657815A/en
Application granted granted Critical
Publication of CN114657815B publication Critical patent/CN114657815B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • 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
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • 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
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/385—Oxides, hydroxides or carbonates
    • 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
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/54—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
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/64—Inorganic compounds
    • 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
    • D21H19/80—Paper comprising more than one coating
    • D21H19/82—Paper comprising more than one coating superposed
    • D21H19/826—Paper comprising more than one coating superposed two superposed coatings, the first applied being pigmented and the second applied being non-pigmented
    • 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
    • D21H19/80—Paper comprising more than one coating
    • D21H19/84—Paper comprising more than one coating on both sides of the substrate
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/16—Sizing or water-repelling agents
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/36—Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
    • D21H21/52—Additives of definite length or shape
    • 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

  • Life Sciences & Earth Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Protection Of Plants (AREA)

Abstract

The invention discloses a preparation method of green degradable antibacterial paper with a bioactive coating of a fruit cultivating bag, which comprises the following steps: preparing a first inner coating antibacterial solution; preparing a natural eutectic solvent; preparing an antibacterial solution of the coating in the second layer; preparing a waterproof coating liquid; and (3) coating the inner surface of the paper surface with the first inner coating antibacterial solution and the second inner coating antibacterial solution in sequence by using a paper machine, coating wax on the outer surface of the paper surface with the waterproof coating solution, and coiling, slitting and rewinding to obtain the finished fruit bag paper. The antibacterial paper prepared by the invention has the characteristics of various antibacterial mechanisms, ultraviolet resistance, good waterproofness, natural degradation and the like, the excellent property of the fruit cultivation bagging paper prolongs the service life of the fruit cultivation bagging, and the aim of recycling is fulfilled, so that the cost is reduced.

Description

Preparation method of green degradable antibacterial paper with bioactive coating of fruit cultivation bag
Technical Field
The invention relates to the field of antibacterial paper, in particular to a preparation method of green degradable antibacterial paper with a bioactive coating of a fruit bag.
Background
The fruit cultivating bag has great effect on the growth of fruits and is more and more commonly used by fruit growers. Can reduce the use of pesticide and pollution. The appearance quality of the fruit is greatly improved. Can reduce the incidence of plant diseases and insect pests and improve the internal quality of fruits. Although the market of the domestic fruit bag paper is realized in China, the product basically replaces the imported product. However, in recent market feedback, the following problems are still found in the national fruit bag paper:
(1) the quality of the fruit bag paper produced in China is poor, and the problems in use are more. The antibacterial coating of the fruit bag paper in the patent CN202017167U adopts biological antibiotics, the fruit bag paper has a certain antibacterial effect, but the antibacterial mechanism is single, and the biological antibiotics are used in an excessive amount to easily cause drug residues, so that the biological antibiotics are not toxic to the residual pesticides.
If the fruit-raising bag paper is low in shading rate and easy to transmit light, the fruit cannot be uniformly colored, the phenomenon of 'blue head' is generated, and the fruit is very easy to scorch in high-temperature weather. The material of the fruit bag paper in patent CN201620812149.4 is soft and easy to deform, which further occupies more storage space, and also causes the increase of the processing procedure, which increases the production cost, and the air permeable net-shaped cavities easily cause sunburn or coloring of the net-shaped patterns on the surface of the fruits, which affects the appearance of the fruits.
If the water resistance of the fruit bag paper is low, a serious water seepage phenomenon can occur after the fruit bag paper is drenched in rainy days. The fruit bag in patent CN201820562650.9 has complex production process and high production cost, and the use of the air holes can increase the risk of insect damage to the fruits, and even rain water can infiltrate into the air holes to cause the fruits to rot and deteriorate. The waterproof layer of the fruit bag paper in the patent CN203206843U adopts a polytetrafluoroethylene layer, the waterproof performance of the coating is excellent, the surface is cold-resistant and heat-resistant, but the polytetrafluoroethylene is a high polymer and cannot be naturally degraded, so that the environmental pollution can be caused by random discarding, and the recovery cost is increased.
(2) The fruit cultivating bag is a large expense in the production cost of fruit growers, and accounts for about 60 percent of the fruit production. This makes fruit growers prefer to select less expensive fruit-raising bags. The low-level fruit cultivation bag paper in the domestic market is the best way, and the fruit cultivation bag frequently has the defects that the bag body is damaged and the fruit is damaged and the agricultural events are occasionally happened. The domestic market urgently needs to provide a fruit cultivating bag with excellent quality and low price.
Disclosure of Invention
In order to solve the problems of the current fruit cultivation bags, the invention provides a preparation method of fruit cultivation bag paper which has various antibacterial mechanisms, ultraviolet resistance, good water resistance and natural degradability, and a preparation method of green degradable antibacterial paper of a bioactive coating of the fruit cultivation bag.
Aiming at the defects in the prior art, the invention provides the fruit cultivation bagging paper which is suitable for the current market benefit requirement, has various antibacterial mechanisms, excellent ultraviolet light resistance and water resistance and can be naturally degraded.
The technical scheme of the invention is specifically explained as follows:
the novel bioactive green degradable antibacterial paper for the fruit cultivating bag comprises common fruit cultivating bag paper, wherein the inner layer of the common fruit cultivating bag paper is coated in sequenceNano TiO 22The film is prepared by blending natural eutectic solvent and polysaccharide, and the outer layer of the fruit bag paper is provided with a waterproof layer. The fruit cultivation bag paper is provided with two layers of nano TiO2The film prepared by blending the natural eutectic solvent and the polysaccharide can prevent the fruits in the fruit bag from being invaded by bacteria and diseases and pests, and the waterproof layer can well resist the invasion of rainwater, thereby ensuring that the fruit bag can be used for many times, saving the cost and improving the benefit.
The technical scheme of the invention is as follows:
the invention aims to provide a preparation method of green degradable antibacterial paper with a bioactive coating of a fruit cultivating bag, which comprises the following steps:
(1) preparing a first inner coating antibacterial solution: mixing sodium hexametaphosphate with water to obtain hexametaphosphate solution, and adding nanometer TiO2Dissolving in hexametaphosphate solution, stirring, adding starch, stirring, and gelatinizing to obtain nanometer TiO2The starch solution is the first layer inner coating antibacterial solution.
(2) Preparing a natural eutectic solvent: adding one or two of natural organic acids into choline chloride, and heating and fully mixing to obtain the natural eutectic solvent.
(3) Preparing an antibacterial solution of the coating in the second layer: and dispersing the chitosan acetic acid solution into the natural eutectic solvent, and stirring at constant temperature to obtain a chitosan solution modified by the natural eutectic solvent, namely the second inner coating antibacterial solution.
(4) Preparing a waterproof coating liquid: and (3) dissolving the shellac varnish sheet in deionized water to obtain the waterproof coating liquid.
(5) Preparing biological antibacterial paper for the fruit cultivating bag: and (3) coating the inner surface of the paper surface with the first inner coating antibacterial solution and the second inner coating antibacterial solution in sequence by using a paper machine, coating wax on the outer surface of the paper surface with the waterproof coating solution, and coiling, slitting and rewinding to obtain the finished fruit bag paper.
In the step (1), the dosage ratio of the hexametaphosphoric acid to the water is (0.5-1.5) mL: 100mL, preferably 1: 100; the nano TiO is2The dosage ratio of the water to the water is (0.02-0.5) g:100 mL, preferably 0.1 g:100 mL; said starch andthe dosage ratio of water is (1-15) g:100 mL of water, preferably 10g/100 mL; the constant temperature heating temperature for stirring and pasting is 80-100 ℃, and the preferred temperature is 90 ℃; the stirring and pasting time is 0.5-2 h, preferably 1 h.
In the step (2), choline chloride in the natural eutectic solvent is a hydrogen bond acceptor, and one or two of natural carboxylic acids are used as hydrogen bond donors. The natural organic acid is one or two of malonic acid, citric acid, ascorbic acid and acetylsalicylic acid. The mol ratio of the choline chloride to the natural organic acid is (1-4) to (1-2). The natural organic acid is ascorbic acid and acetylsalicylic acid, the mol ratio of choline chloride to ascorbic acid to acetylsalicylic acid is (1-4) to (1-2), and the preferable ratio is 3:1: 1; the heating temperature is 50-60 deg.C, preferably 50 deg.C.
In the step (3), the preparation of the chitosan acetic acid solution comprises the following steps:
adding chitosan into water, adding acetic acid, and magnetically stirring to obtain chitosan solution;
the dosage ratio of the chitosan to the water is (1-3) g/(100-; the dosage ratio of the acetic acid to the water is (1-2) mL/100mL of water, and preferably 1.5mL/100 mL; the dosage ratio of the natural eutectic solvent to the chitosan is (20-80) g to 100g, preferably 60 to 100; the constant-temperature stirring temperature is 50-70 ℃, and preferably 60 ℃; the constant-temperature stirring time is 1-4 h, preferably 2 h.
In the step (4), the dosage ratio of the shellac varnish tablet to the ionized water is (1-2) g/(100-150) mL. Preferably 1g/100 mL.
And (5) in the paper machine at the place for coating the paper surface. The surface coating proportion of the antibacterial coating liquid and the waterproof coating liquid to the paper surface is 500-1000mL/m2Preferably 800mL/m2。
The advantages and the beneficial effects of the invention are as follows:
(1) the fruit bag paper is a biological active green degradable antibacterial paper, and the product is that the inner surface of the common fruit bag paper is coated with a first layer of nano TiO in sequence2Coating a second layer of natural eutectic solventA plasticized chitosan film. TiO 22Can only show excellent photocatalysis performance and antibacterial performance under the irradiation of ultraviolet light, therefore, the first layer of the inner surface of the fruit bag paper is coated with nano TiO2The starch film has photocatalytic antibacterial capacity. The second layer is coated with a chitosan film plasticized by a natural eutectic solvent, and the organic acid natural eutectic solvent can interact with cell walls/films of bacteria through hydrogen bond action, damage cell outer membranes to achieve an antibacterial effect, prevent the self antibacterial effect of chitosan from being reduced due to the addition of a conventional plasticizer, and even play a synergistic antibacterial effect with chitosan. Nano TiO 22The composite of the eutectic solvent and the chitosan can enhance the antibacterial and bactericidal functions of the fruit bag paper through multiple antibacterial mechanisms.
(2) The surface of the fruit bag paper is coated with nano TiO in sequence2After the polysaccharide film is mixed with the natural eutectic solvent, besides the antibacterial capability, the second layer of the natural eutectic solvent loaded with organic acids contains ascorbic acid, so that the natural eutectic solvent obtains stronger antioxidant capability, the oxidative stress in fruits can be delayed, and the resistance of the fruits to adverse environments can be improved.
(3) The surface of the fruit bag paper is coated with nano TiO in sequence2And the polysaccharide film of the natural eutectic solvent is characterized in that the second layer is loaded with the natural eutectic solvent of organic acids, so that the natural eutectic solvent has good ultraviolet wave absorption effect, the ultraviolet blocking capability of the paper bag is improved, and meanwhile, the ultraviolet-induced nano TiO is not influenced because the first layer is coated closer to the outer surface2The coating fruit-bearing bag paper can not only make the fruits in the bag well resist the invasion of sunlight and ultraviolet rays, but also keep good antibacterial effect.
Drawings
FIG. 1 shows a nano TiO compound2And the bacteriostatic rate of the coating paper of the natural eutectic solvent polysaccharide film to escherichia coli and staphylococcus aureus is shown schematically;
FIG. 2 shows nano TiO2And a schematic of the clearance of DPPH and ABTS by coated paper of a natural eutectic solvent polysaccharide film;
FIG. 3 is a view of nano TiO2And a light transmittance profile of a natural eutectic solvent polysaccharide coating film.
Detailed Description
The invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto:
example 1:
(1) adding 5g sodium hexametaphosphate into 500mL purified water, and adding 0.5g nano TiO2Adding the mixture into a sodium hexametaphosphate solution, and magnetically stirring for 1 h; 50g of starch was added to the solution and magnetically stirred at 90 ℃ for 1 hour to prepare a first layer of coating solution.
(2) Adding 10g of chitosan into 500mL of purified water, adding 7.5mL of acetic acid, and magnetically stirring for 1 hour at the temperature of 60 ℃ to obtain a chitosan solution;
(3) mixing acetylsalicylic acid, ascorbic acid and choline chloride according to a molar ratio of 1:1:3, and ball-grinding at 50 ℃ and 600rpm for 30min to obtain an organic acid eutectic solvent (AA/VC/CHCl);
(4) pouring the organic acid eutectic solvent with the weight of more than 6g into 500mL of chitosan solution, and stirring for 2h at the temperature of 60 ℃ to prepare second-layer coating liquid.
(5) The first layer of coating solution (800 mL/m) is sequentially added2) Second layer coating solution (800 mL/m)2) Coating the inner layer of the fruit bag paper to form a film, heating and drying the coated fruit bag paper at 50 ℃ for 30min, and drying the paper surface to form a film.
(6) Dissolving 1g of shellac varnish flakes in 100mL of deionized water, and magnetically stirring for 1h to prepare shellac varnish flake solution;
(7) mixing shellac varnish tablet solution (800 mL/m)2) Coating the outer layer of the fruit bag paper to form a film, heating and drying the coated fruit bag paper at 50 ℃ for 30min, and drying the paper surface to form a film.
(8) Cutting the obtained coated fruit bag paper into proper sizes, and detecting the bacteriostatic effect of different antibacterial coated papers and the light transmittance of the coated films by using a flat plate counting method.
Example 2:
(1) adding 5g sodium hexametaphosphate into 500mL purified water, and adding 0.5g nano TiO2Adding into sodium hexametaphosphate solution, and magnetically stirring for 1 h; adding 50g of starchAdding into the solution, magnetically stirring for 1 hr to obtain the first layer of coating liquid.
(2) Adding 10g of chitosan into 500mL of purified water, adding 7.5mL of acetic acid, and magnetically stirring for 1 hour at the temperature of 60 ℃ to obtain a chitosan solution;
(3) mixing acetylsalicylic acid and choline chloride according to a molar ratio of 1:1, and ball-grinding at 50 ℃ and 600rpm for 30min to obtain an organic acid eutectic solvent (AA/CHCl);
(4) pouring the organic acid eutectic solvent with the weight of more than 6g into 500mL of chitosan solution, and stirring for 2h at the temperature of 60 ℃ to prepare second-layer coating liquid.
(5) The first layer of coating solution (800 mL/m) is sequentially added2) Second layer coating solution (800 mL/m)2) Coating the inner layer of the fruit bag paper to form a film, heating and drying the coated fruit bag paper at 50 ℃ for 30min, and drying the paper surface to form a film.
(6) Dissolving 1g of shellac varnish flakes in 100mL of deionized water, and magnetically stirring for 1h to prepare shellac varnish flake solution;
(7) mixing shellac varnish tablet solution (800 mL/m)2) Coating the outer layer of the fruit bag paper to form a film, heating and drying the coated fruit bag paper at 50 ℃ for 30min, and drying the paper surface to form a film.
(8) Cutting the obtained film-coated fruit bag paper into proper sizes, and detecting the bacteriostatic effect of different antibacterial coated papers and the light transmittance of the coated films by using a flat plate counting method.
Example 3:
(1) adding 5g sodium hexametaphosphate into 500mL purified water, and adding 0.5g nano TiO2Adding the mixture into a sodium hexametaphosphate solution, and magnetically stirring for 1 h; 50g of starch was added to the solution and magnetically stirred for 1 hour to obtain a first layer of coating solution.
(2) Adding 10g of chitosan into 500mL of purified water, adding 7.5mL of acetic acid, and magnetically stirring for 1 hour at the temperature of 60 ℃ to prepare a chitosan solution;
(3) mixing ascorbic acid and choline chloride at a molar ratio of 1:2, ball-grinding at 50 deg.C at 600rpm for 30min to obtain organic acid eutectic solvent (VC/CHCl);
(4) and 6g of different organic acid eutectic solvents are poured into 500mL of chitosan solution, and the mixture is stirred for 2 hours at the temperature of 60 ℃ to prepare a second layer of coating liquid.
(5) Sequentially coating the first layer and the second layer of coating liquid on the inner layer of the fruit bag paper to form a film, heating and drying the film coated fruit bag paper at 50 ℃ for 30min, and drying the paper surface to form the film.
(6) Dissolving 1g of shellac varnish flakes in 100mL of deionized water, and magnetically stirring for 1h to prepare shellac varnish flake solution;
(7) coating the lac lacquer solution on the outer layer of the fruit bag paper to form a film, heating and drying the film-coated fruit bag paper at 50 ℃ for 30min, and drying the paper surface to form a film.
(8) Cutting the obtained coated fruit bag paper into proper sizes, and detecting the bacteriostatic effect of different antibacterial coated papers and the light transmittance of the coated films by using a flat plate counting method.
Example 4:
(1) adding 5g sodium hexametaphosphate into 500mL purified water, and adding 0.5g nano TiO2Adding into sodium hexametaphosphate solution, and magnetically stirring for 1 h; adding 50g of starch into the solution, and magnetically stirring for 1 hour to prepare a first layer of coating liquid.
(2) Adding 10g of chitosan into 500mL of purified water, adding 7.5mL of acetic acid, and magnetically stirring for 1 hour at the temperature of 60 ℃ to obtain a chitosan solution;
(3) mixing citric acid and choline chloride according to a molar ratio of 1:1, ball-grinding at 50 ℃ at 600rpm for 30min to obtain an organic acid eutectic solvent (CA/ChCl);
(4) and 6g of different organic acid eutectic solvents are poured into 500mL of chitosan solution, and the mixture is stirred for 2 hours at the temperature of 60 ℃ to prepare a second layer of coating liquid.
(5) Sequentially coating the first layer and the second layer of coating liquid on the inner layer of the fruit bag paper to form a film, heating and drying the film-coated fruit bag paper at 50 ℃ for 30min, and drying the paper surface to form the film.
(6) Dissolving 1g of shellac varnish flakes in 100mL of deionized water, and magnetically stirring for 1h to prepare shellac varnish flake solution;
(7) coating the lac lacquer solution on the outer layer of the fruit bag paper to form a film, heating and drying the film-coated fruit bag paper at 50 ℃ for 30min, and drying the paper surface to form a film.
(8) Cutting the obtained coated fruit bag paper into proper sizes, and detecting the bacteriostatic effect of different antibacterial coated papers and the light transmittance of the coated films by using a flat plate counting method.
Example 5:
(1) adding 5g sodium hexametaphosphate into 500mL purified water, and adding 0.5g nano TiO2Adding into sodium hexametaphosphate solution, and magnetically stirring for 1 h; adding 50g of starch into the solution, and magnetically stirring for 1 hour to prepare a first layer of coating liquid.
(2) Adding 10g of chitosan into 500mL of purified water, adding 7.5mL of acetic acid, and magnetically stirring for 1 hour at the temperature of 60 ℃ to obtain a chitosan solution;
(3) mixing malonic acid and choline chloride according to the mol ratio of 1:1, ball-grinding at the temperature of 50 ℃ and the rpm of 600 for 30min to prepare an organic acid eutectic solvent (MA/ChCl);
(4) and pouring 6g of different organic acid eutectic solvents into 500mL of chitosan solution, and stirring for 2h at 60 ℃ to prepare a second layer coating solution.
(5) Sequentially coating the first layer and the second layer of coating liquid on the inner layer of the fruit bag paper to form a film, heating and drying the film-coated fruit bag paper at 50 ℃ for 30min, and drying the paper surface to form the film.
(6) Dissolving 1g of shellac varnish flakes in 100mL of deionized water, and magnetically stirring for 1h to prepare shellac varnish flake solution;
(7) coating the lac lacquer sheet solution on the outer layer of the fruit bag paper to form a film, heating and drying the film-coated fruit bag paper at 50 ℃ for 30min, and drying the paper surface to form a film.
(8) Cutting the obtained coated fruit bag paper into proper sizes, and detecting the bacteriostatic effect of different antibacterial coated papers and the light transmittance of the coated films by using a flat plate counting method.
The results of the experiment are shown in fig. 1, 2 and 3.
The bacteriostatic rates of the coated paper with different eutectic solvents to escherichia coli and staphylococcus aureus are shown in figure 1, and it can be seen from figure 1 that the fruit bag paper prepared by the different eutectic solvent coatings has different antibacterial effects to escherichia coli and staphylococcus aureus, except for the eutectic solvent only added with ascorbic acid, the fruit bag paper coated with other eutectic solvents has an obvious bacteriostatic effect, and particularly the bacteriostatic rate of the eutectic solvent added with acetylsalicylic acid and malonic acid to escherichia coli and staphylococcus aureus reaches more than 98%.
The clearance of the coated paper with different eutectic solvents to DPPH and ABTS is shown in figure 2, and it can be seen from figure 2 that the clearance of DPPH and ABTS free radicals of the fruit bag paper prepared by different eutectic solvents is obviously different, wherein the membranes added with acetylsalicylic acid/ascorbic acid/choline chloride and ascorbic acid/choline chloride have the highest clearance of free radicals.
The light transmittance of the coating films with different eutectic solvents is shown in fig. 3, and it can be seen from fig. 3 that the chitosan film added with acetylsalicylic acid/choline chloride, acetylsalicylic acid/ascorbic acid/choline chloride has excellent ultraviolet blocking capability within the range of 200-370nm, and blocks ultraviolet from damaging fruits to a certain extent, thereby protecting the fruits and prolonging the shelf life of the fruits.

Claims (10)

1. A preparation method of green degradable antibacterial paper with a bioactive coating of a fruit cultivating bag is characterized by comprising the following steps:
(1) mixing sodium hexametaphosphate with water to obtain hexametaphosphate solution, and adding nanometer TiO2Dissolving in hexametaphosphate solution, stirring, adding starch, stirring, and gelatinizing to obtain nanometer TiO2Starch solution, namely the first inner coating antibacterial solution;
(2) adding one or two of natural organic acids into choline chloride, and heating and fully mixing to obtain a natural eutectic solvent;
(3) dispersing the chitosan acetic acid solution into a natural eutectic solvent, and stirring at constant temperature to obtain a natural eutectic solvent modified chitosan solution, namely the second inner coating antibacterial solution;
(4) preparing a waterproof coating liquid: dissolving shellac varnish sheets in deionized water to obtain waterproof coating liquid;
(5) preparing biological antibacterial paper for fruit cultivation bags: and (3) coating the inner surface of the paper surface with the first inner coating antibacterial solution and the second inner coating antibacterial solution in sequence by using a paper machine, coating wax on the outer surface of the paper surface with the waterproof coating solution, and coiling, slitting and rewinding to obtain the finished fruit bag paper.
2. The method for preparing the biodegradable antibacterial green paper with bioactive coating for fruit growing bag according to claim 1, wherein in the step (1), the dosage ratio of the hexametaphosphate to the water is (0.5-1.5) mL: 100 mL;
the nano TiO is2The dosage ratio of the water to the water is (0.02-0.5) g:100 mL;
the dosage ratio of the starch to the water is (1-15) g:100 mL of water.
3. The method for preparing the green degradable antibacterial paper with the bioactive coating for the fruit cultivating bag according to the claim 1, wherein in the step (1), the constant-temperature heating temperature for stirring and pasting is 80-100 ℃, and the time for stirring and pasting is 0.5-2 h.
4. The method for preparing the biodegradable green antibacterial paper with bioactive coating for fruit growing bag according to claim 1, wherein in the step (2), the natural organic acid is one or two of malonic acid, citric acid, ascorbic acid and acetylsalicylic acid.
5. The method for preparing the biodegradable antibacterial green paper with bioactive coating for fruit growing bag according to claim 1, wherein in the step (2), the molar ratio of the choline chloride to the natural organic acid is (1-4) to (1-2);
the natural organic acid is ascorbic acid and acetylsalicylic acid, and the molar ratio of choline chloride to ascorbic acid to acetylsalicylic acid is (1-4) to (1-2).
6. The method for preparing the biodegradable antibacterial paper with bioactive coating for fruit growing bag according to claim 1, wherein in step (3), the preparation of the chitosan acetic acid solution comprises:
adding chitosan into water, adding acetic acid, and magnetically stirring to obtain chitosan solution.
7. The method for preparing the biodegradable antibacterial paper with the bioactive coating for the fruit cultivating bag as claimed in claim 6, wherein the dosage ratio of the chitosan to the water is (1-3) g/(100-;
the dosage ratio of the acetic acid to the water is (1-2) mL/100mL of water.
8. The method for preparing the biodegradable antibacterial green paper with bioactive coating for fruit growing bag according to claim 1, wherein in the step (3), the ratio of the amount of the natural eutectic solvent to the amount of the chitosan is (20-80) g:100 g;
the constant-temperature stirring temperature is 50-70 ℃, and the constant-temperature stirring time is 1-4 hours.
9. The method for preparing the green degradable antibacterial paper with the bioactive coating for the fruit cultivating bag as claimed in claim 1, wherein in the step (4), the ratio of the dosage of the shellac paint tablet to the ionic water is (1-2) g/(100-.
10. The method for preparing the biodegradable antibacterial paper with the bioactive coating for the fruit cultivating bag as claimed in claim 1, wherein in the step (5), the ratio of the antibacterial solution in the first inner coating layer to the surface of the paper is 500-1000 mL/m-2；
The ratio of the antibacterial solution for coating the surface of the paper in the second layer is 500-1000mL/m2；
The surface coating proportion of the waterproof coating liquid to the paper surface is 500-1000mL/m2。
CN202210305061.3A 2022-03-25 2022-03-25 Preparation method of green degradable antibacterial paper with bioactive coating of fruit cultivation bag Active CN114657815B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210305061.3A CN114657815B (en) 2022-03-25 2022-03-25 Preparation method of green degradable antibacterial paper with bioactive coating of fruit cultivation bag

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210305061.3A CN114657815B (en) 2022-03-25 2022-03-25 Preparation method of green degradable antibacterial paper with bioactive coating of fruit cultivation bag

Publications (2)

Publication Number Publication Date
CN114657815A true CN114657815A (en) 2022-06-24
CN114657815B CN114657815B (en) 2022-11-08

Family

ID=82031733

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210305061.3A Active CN114657815B (en) 2022-03-25 2022-03-25 Preparation method of green degradable antibacterial paper with bioactive coating of fruit cultivation bag

Country Status (1)

Country Link
CN (1) CN114657815B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106317723A (en) * 2016-08-30 2017-01-11 高邮市红太阳食品有限公司 Preparation method of nano-sized double-layer degradable packaging film with antibacterial function
US20180000753A1 (en) * 2014-12-31 2018-01-04 University Of Oslo Eutectic solvents and uses thereof
CN109252419A (en) * 2018-09-29 2019-01-22 安徽大力熊环保塑料科技有限公司 A method of coating nano-titanium dioxide-chitosan antimicrobial agent prepares super-hydrophobic antibacterial paper packing material
CN110055820A (en) * 2019-03-06 2019-07-26 浙江工业大学 A kind of preparation method of the compound fresh-keeping paper base material of functionality for reinforcing sustained release
US20190281845A1 (en) * 2016-02-01 2019-09-19 Universidad De Chile Edible bio-active films based on chitosan or a mixture of quinoa protein-chitosan; sheets having chitosan-tripolyphosphate-thymol nanoparticles; production method; bio-packaging comprising same; and use thereof in fresh fruit with a low ph
WO2021261638A1 (en) * 2020-06-23 2021-12-30 주식회사 카드네이션 Antibacterial overlay film for manufacturing plastic card, and manufacturing method therefor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180000753A1 (en) * 2014-12-31 2018-01-04 University Of Oslo Eutectic solvents and uses thereof
US20190281845A1 (en) * 2016-02-01 2019-09-19 Universidad De Chile Edible bio-active films based on chitosan or a mixture of quinoa protein-chitosan; sheets having chitosan-tripolyphosphate-thymol nanoparticles; production method; bio-packaging comprising same; and use thereof in fresh fruit with a low ph
CN106317723A (en) * 2016-08-30 2017-01-11 高邮市红太阳食品有限公司 Preparation method of nano-sized double-layer degradable packaging film with antibacterial function
CN109252419A (en) * 2018-09-29 2019-01-22 安徽大力熊环保塑料科技有限公司 A method of coating nano-titanium dioxide-chitosan antimicrobial agent prepares super-hydrophobic antibacterial paper packing material
CN110055820A (en) * 2019-03-06 2019-07-26 浙江工业大学 A kind of preparation method of the compound fresh-keeping paper base material of functionality for reinforcing sustained release
WO2021261638A1 (en) * 2020-06-23 2021-12-30 주식회사 카드네이션 Antibacterial overlay film for manufacturing plastic card, and manufacturing method therefor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
李旭飞等: "壳聚糖/无机物纳米复合材料在抗菌方面的研究进展", 《材料导报》 *

Also Published As

Publication number Publication date
CN114657815B (en) 2022-11-08

Similar Documents

Publication Publication Date Title
US4769242A (en) Process for preparing insect-repellant and insecticidal article for breeding plants
CN1208289C (en) Coating agent for slow release fertilizer
KR101031365B1 (en) Biodegradable compositions for liquid mulching, a method for preparing the same and a method for mulching using the same
CN106117570A (en) A kind of sodium alginate anti-bacterial hydrogel loading daiamid dendrimer and its preparation method and application
CN110117413B (en) Degradable mulching film for plateau vegetable planting and preparation method and application thereof
CN109380304B (en) Oxide nano material for resisting plant rot disease, preparation method and application thereof
CN114657815B (en) Preparation method of green degradable antibacterial paper with bioactive coating of fruit cultivation bag
CN111165235A (en) Photocatalytic spray type insect-proof antibacterial fresh-keeping liquid and preparation method thereof
BE1027415B1 (en) Manufacturing process and use of a germicidal dissolvable polymer
CN117659546A (en) Ecological degradable mulching film and preparation method thereof
CN109438943A (en) A kind of preparation method of environmental protection agricultural mulching
CN102206067A (en) Mildewproof joint sealant
CN106467614B (en) Environment-friendly light storage film and preparation method and application thereof
CN115181337B (en) Antibacterial hydrophobic membrane and preparation method thereof
US2714062A (en) Composition for and process of restoring the green color of grass
CN115053909B (en) Bio-based green composite antibacterial agent and preparation method and application thereof
CN110330804A (en) A kind of full degradable mulch of addition biomass fiber controllable biological base
CN112120016A (en) Chitosan degradable biological seed coating film and preparation method thereof
CN114311773A (en) Manufacturing method of antibacterial packaging material for seed storage
CN113024894A (en) Sowable multifunctional gel mulching film for inhibiting weed growth and preparation and application thereof
CN109385060A (en) A kind of degradable mulch
CN107722330B (en) Preparation method of efficient heat-preservation agricultural plastic greenhouse film
DE102019105019B4 (en) Use of a liquid formulation to form elastic, stable, biodegradable polymer films
CN104824059A (en) Pest-preventing agricultural mulch plastic film additive
CN108276715A (en) A kind of degradable Multifunctional agricultural thin film and preparation method thereof

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