CN111979844A - Anticorrosive green environment-friendly corrugated paper production process - Google Patents

Anticorrosive green environment-friendly corrugated paper production process Download PDF

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CN111979844A
CN111979844A CN202010903546.3A CN202010903546A CN111979844A CN 111979844 A CN111979844 A CN 111979844A CN 202010903546 A CN202010903546 A CN 202010903546A CN 111979844 A CN111979844 A CN 111979844A
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corrugated paper
solution
environment
drying
friendly
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黄少荣
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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
    • D21H17/02—Material of vegetable origin
    • 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
    • D21H17/25—Cellulose
    • 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
    • D21H17/63—Inorganic compounds
    • D21H17/66—Salts, e.g. alums
    • 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
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/675—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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/69—Water-insoluble compounds, e.g. fillers, pigments modified, e.g. by association with other compositions prior to incorporation in the pulp or 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
    • D21H17/71—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes
    • D21H17/74—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes of organic and inorganic material
    • 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
    • D21H19/12—Coatings without pigments applied as a solution using water as the only solvent, e.g. in the presence of acid or alkaline 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
    • 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
    • D21H21/06—Paper forming aids
    • D21H21/08—Dispersing agents for fibres
    • 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
    • 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

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Paper (AREA)

Abstract

The invention discloses an anticorrosive green environment-friendly corrugated paper production process which comprises the steps of wood fiber pulp preparation, wood fiber pulp treatment by using a modifier, paper making treatment to prepare a corrugated paper semi-finished product, corrugated paper semi-finished product soaking, surface sizing treatment of the soaked corrugated paper by using a sizing agent, drying post-treatment and the like. According to the invention, the antibacterial agent is added into the paper making pulp, and is an organic-inorganic compound antibacterial agent, so that the paper making pulp has extremely high antibacterial performance, and can form a chemical bonding effect with wood fibers, thereby improving the antibacterial stability and durability, and enabling the base paper body of the corrugated paper to have extremely high antibacterial and corrosion resistance; soaking the corrugated paper by using a soaking solution to enable the active ingredient, namely tannin substances, in the soaking solution to form hydrogen bonds and electrostatic attraction with the wood fibers; in addition, the adopted raw materials are all green and environment-friendly, and the environment-friendly corrugated paper with corrosion resistance and high mechanical property is obtained.

Description

Anticorrosive green environment-friendly corrugated paper production process
Technical Field
The invention belongs to the technical field of corrugated paper production, and particularly relates to an anticorrosive green environment-friendly corrugated paper production process.
Background
Corrugated board is also called corrugated board. Is formed by bonding at least one layer of corrugated paper and one layer of boxboard (also called boxboard), and has better elasticity and extensibility. The method is mainly used for manufacturing cartons, the sandwich of the cartons and other packaging materials of fragile commodities. The raw paper board similar to yellow paper board is made up by using straw pulp of earth method and waste paper through pulping, then is mechanically processed and rolled into corrugated form, then on its surface the adhesive of sodium silicate is used to adhere it to the cardboard paper so as to obtain the invented product. The corrugated corrugations of the corrugated board are like arch doors which are connected one by one, are mutually parallel to form a row and mutually support to form a triangular structure body, so that the corrugated board has better mechanical strength, can bear certain pressure from a plane, is rich in elasticity and has good buffering effect; the cushion can be made into liners or containers with various shapes and sizes according to requirements, and is simpler, more convenient and faster than plastic buffer materials; but corrugated container board uses in the environment that humidity is great for a long time, not only can absorb water, influences its intensity, can easily breed the mould moreover, influences its performance and life.
Chinese patent No. CN201910876039.2 discloses a method for producing a waterproof corrugated case, which comprises the following steps: step S1, preparation of corrugated boards; step S2, waterproofing the surface layer of the corrugated board: uniformly spraying waterproof paint on the surface of special paper on the surface layer of the corrugated board, then placing the corrugated board in a vacuum bag for 10-15min, and finally drying in an oven at 60-80 ℃ to constant weight; and S3, performing die cutting, indentation and carton nailing/carton sticking on the waterproof corrugated board manufactured in the step S2 to obtain the waterproof corrugated carton. This application improves corrugated container board's waterproof performance through at corrugated container board top layer spraying waterproof coating, however, can have the hole in the coating, and after moisture got into the corrugated paper through the hole, breed the bacterium mould, can make the corrugated paper corroded, and then influence the performance and the life of corrugated paper.
Disclosure of Invention
The invention aims to provide an anticorrosive green environment-friendly corrugated paper production process, which is characterized in that an antibacterial agent is added into a paper making pulp, the antibacterial agent is an organic-inorganic compound antibacterial agent, and has extremely high antibacterial performance, and can form a chemical bonding effect with wood fibers, so that the antibacterial stability and durability are improved, and a base paper body of the corrugated paper has extremely high antibacterial and corrosion resistance; the corrugated paper is soaked by the soaking solution, so that hydrogen bonds and electrostatic attraction are formed between the active ingredient tannin substances in the soaking solution and the wood fibers, and the corrosion resistance and the antibacterial performance of the corrugated paper are further improved; by adopting a specially-made sizing agent to carry out sizing treatment on the surface of the corrugated paper, a compact starch coating layer with good adhesion can be formed on the surface of the corrugated paper, and the mechanical properties of the corrugated paper, such as tensile strength, surface strength, stiffness and the like, can be improved; in addition, the adopted raw materials are all green and environment-friendly, so that the environment-friendly corrugated paper with corrosion resistance and high mechanical property is obtained, and the corrugated paper is suitable for the field of packaging materials.
The purpose of the invention can be realized by the following technical scheme:
the production process of the anti-corrosion green environment-friendly corrugated paper comprises the following steps:
firstly, peeling off barks of trunks, crushing the trunks into fragments, putting the trunks into strong alkaline chemical solution according to the solid-to-liquid ratio of 1g:25-30mL for cooking for 110-120min, continuously stirring in the cooking process, removing impurities and filtering after the cooking is finished, cleaning filter residues with clear water until the washing liquid is neutral, and drying at 105 ℃ until the filter residues are completely dried to obtain wood fibers;
secondly, adding water and wood fiber into a reaction kettle, heating to 60-80 ℃, and performing pulping for 30-40min, wherein the mass ratio of the water to the wood fiber is 5-12:1-2 to obtain pulp;
thirdly, adding a modifier into the slurry, stirring, uniformly mixing to make the slurry become viscous, heating to 90-100 ℃, carrying out heat preservation treatment for 10-15 minutes, wherein the mass ratio of the modifier to the slurry is 1:18-20, then adding an aluminum sulfate solution into the viscous slurry, and uniformly mixing;
wherein the mass fraction of the aluminum sulfate solution is 11-15%, and the ratio of the volume of the aluminum sulfate solution to the volume of the thickened slurry is 1: 45-50;
fourthly, adjusting the temperature of the reaction kettle to 75-85 ℃, and carrying out papermaking treatment on the pulp processed in the third step to obtain a corrugated paper semi-finished product;
fifthly, soaking the semi-finished corrugated paper in a soaking solution at the temperature of 55-60 ℃ for 22-24h at a constant temperature, taking out, and drying at the temperature of 100-105 ℃ until the water content is less than 2% to obtain soaked corrugated paper;
sixthly, performing surface sizing treatment on the soaked corrugated paper by using a sizing agent, wherein the coating weight is 6-10g/m2；
And seventhly, drying the corrugated paper subjected to surface sizing in a drying cylinder at the temperature of 120-130 ℃ until the water content is 3-6%, taking out, and standing at room temperature for 22-24 hours to obtain the corrugated paper.
Further, the strong alkaline chemical solution in the first step is a mixed solution formed by sodium hydroxide and sulfite, and the mass fractions of the sodium hydroxide and the sulfite in the strong alkaline chemical solution are 8.5% and 5.2%, respectively.
Further, the modifier in the third step consists of a polyacrylic ammonium salt dispersing agent, hydroxyethyl cellulose and an antibacterial agent, wherein the mass ratio of the polyacrylic ammonium salt dispersing agent to the hydroxyethyl cellulose to the antibacterial agent is 1:1.5-1.8: 2-3.
Further, the antibacterial agent is prepared by the following method:
s1, dissolving glutamic acid in an ethanol aqueous solution at 35-38 ℃ to prepare a glutamic acid solution with the mass fraction of 2.8%, mixing nano zinc oxide and the glutamic acid solution according to the proportion of 2g:3mL, heating to 55-60 ℃, reacting for 1.5-2h, naturally cooling to room temperature, filtering, adding filter residue into absolute ethyl alcohol according to the proportion of 1g:10mL, centrifuging at the speed of 5000r/min by adopting a high-speed centrifuge, taking a precipitate, repeating the operation for 4-5 times, and drying to obtain pretreated nano zinc oxide;
s2, mixing the pretreated nano zinc oxide with absolute ethyl alcohol according to the solid-to-liquid ratio of 1g:2mL, adding 6g of cinnamaldehyde after ultrasonic dispersion for 25-30min, heating, reacting for 180-24 min under the conditions of constant temperature of 60 ℃ and nitrogen, filtering when the reaction is finished, centrifugally washing for 3-4 times by using absolute ethyl alcohol, and drying for 22-24h at 60 ℃ to obtain the antibacterial agent.
Further, the volume ratio of ethanol to water in the ethanol aqueous solution in the step S1 is 4: 1; in the step S2, the mass ratio of the pretreated nano zinc oxide to the cinnamaldehyde is 16-18: 1.
Further, the soaking solution in the fifth step is prepared by the following method:
1) drying sanguisorba officinalis roots, grinding into powder, sieving with a 200-mesh sieve, mixing sanguisorba officinalis root powder and 60% ethanol aqueous solution according to a solid-to-liquid ratio of 1g:12-15mL, stirring uniformly, carrying out ultrasonic extraction, removing filter residues, collecting an extracting solution, concentrating the extracting solution by using a rotary evaporator, and freeze-drying the concentrated solution by using a vacuum freeze-dryer to obtain a yellowish-brown liquid;
2) diluting the yellowish-brown liquid with 60% ethanol aqueous solution according to the volume ratio of 1:25 to obtain a soaking solution.
Further, ultrasonic extraction conditions in the step 1): the power is 300W, and the time is 40-45 min.
Further, the sizing agent in the sixth step is prepared by the following method:
weighing a certain amount of oxidized starch in a reaction kettle, adding water into the reaction kettle, heating to 93-95 ℃, preserving heat for 20-24min, naturally cooling to ensure that the temperature of the mixture is 70-75 ℃, adding a styrene-acrylate copolymer into the reaction kettle, and stirring and mixing uniformly at the constant temperature of 70-75 ℃ to obtain the sizing agent.
Furthermore, the mass concentration of the oxidized starch in the sizing agent is 5.8-6.2%, and the mass concentration of the styrene-acrylate copolymer is 8.5-9.2%.
The invention has the beneficial effects that:
the paper making pulp is added with a modifier, wherein the modifier comprises a dispersing agent, a thickening agent and an antibacterial agent, wherein the self-made antibacterial agent is an inorganic-organic compound antibacterial agent, aldehyde groups on cinnamaldehyde molecules and-NH on modified nano zinc oxide molecules2The reaction is carried out, so that cinnamaldehyde molecules are grafted on the surface of the nano zinc oxide molecules through chemical bonding to form the antibacterial agent; due to the nano oxygenThe zinc oxide is an inorganic antibacterial agent, and the cinnamaldehyde is an organic antibacterial agent, so that the obtained antibacterial agent is an organic-inorganic composite antibacterial agent, so that the antibacterial agent has the advantages of inorganic and organic antibacterial agents, and has the characteristics of high antibacterial performance and difficult migration; in addition, the organic molecules are coated on the surfaces of the nano zinc oxide particles, so that the agglomeration phenomenon among the inorganic nanoparticles can be improved, the compatibility of the inorganic nanoparticles and a polymer matrix can be enhanced, in addition, the antibacterial agent molecules contain-COOH capable of reacting with wood fibers, and the chemical bond bonding force is larger than the electrostatic acting force and the hydrogen bond acting force, so that the bonding force between the antibacterial agent and the wood fibers can be improved, the migration resistance of the antibacterial agent molecules is improved, the antibacterial agent stably exists in the wood fibers of the corrugated paper, and the antibacterial effect is continuously and stably exerted;
according to the method, the corrugated paper semi-finished product is soaked by using a soaking solution, the effective component in the soaking solution is a sanguisorba officinalis root extract, the sanguisorba officinalis root is subjected to ultrasonic extraction by using an ethanol water solution, and active substances in the sanguisorba officinalis root can be extracted to the maximum extent by controlling extraction parameters; the sanguisorba officinalis root extract contains more polyphenol compounds such as tannin, has the characteristics of environmental protection, no pollution to the environment, strong antibacterial capability and the like, and has certain functions of corrosion prevention and insect prevention; the semi-finished product of the corrugated paper is soaked by adopting the soaking solution, and the active ingredients in the sanguisorba root extracting solution can be combined with wood fibers through hydrogen bond action and electrostatic adsorption action, so that the corrosion resistance and the antibacterial performance of the corrugated paper are improved;
according to the invention, a specially-made sizing agent is adopted to carry out sizing treatment on the surface of the corrugated paper, and the styrene-acrylate copolymer is added into the starch solution, and can carry out cross-linking reaction with hydroxyl, so that the styrene-acrylate copolymer can generate chemical action with starch, and the binding force with the starch is improved; when the sizing agent is coated on the surface of the corrugated paper, the styrene-acrylate copolymer can also react with hydroxyl on wood fiber molecules to play a role in crosslinking, so that the bonding force between the starch coating and the surface of the corrugated paper is improved, the compactness of the formed adhesive coating can be improved, and the indexes of the corrugated paper, such as tensile strength, surface strength, stiffness and the like, can be improved;
according to the invention, the antibacterial agent is added into the paper making pulp, and is an organic-inorganic compound antibacterial agent, so that the paper making pulp has extremely high antibacterial performance, and can form a chemical bonding effect with wood fibers, thereby improving the antibacterial stability and durability, and enabling the base paper body of the corrugated paper to have extremely high antibacterial and corrosion resistance; the corrugated paper is soaked by the soaking solution, so that hydrogen bonds and electrostatic attraction are formed between the active ingredient tannin substances in the soaking solution and the wood fibers, and the corrosion resistance and the antibacterial performance of the corrugated paper are further improved; by adopting a specially-made sizing agent to carry out sizing treatment on the surface of the corrugated paper, a compact starch coating layer with good adhesion can be formed on the surface of the corrugated paper, and the mechanical properties of the corrugated paper, such as tensile strength, surface strength, stiffness and the like, can be improved; in addition, the adopted raw materials are all green and environment-friendly, so that the environment-friendly corrugated paper with corrosion resistance and high mechanical property is obtained, and the corrugated paper is suitable for the field of packaging materials.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The production process of the anti-corrosion green environment-friendly corrugated paper comprises the following steps:
firstly, peeling off barks of trunks, crushing the trunks into fragments, and putting the trunks into a strong alkaline chemical solution for cooking according to a solid-to-liquid ratio of 1g:25-30mL, wherein the strong alkaline chemical solution is a mixed solution formed by sodium hydroxide and sulfite, and the mass fractions of the sodium hydroxide and the sulfite in the strong alkaline chemical solution are respectively 8.5% and 5.2%; dissolving lignin and various wood fibers in colloidal substances in the trunk by using the strong alkaline chemical substances, steaming for 110-120min, continuously stirring in the steaming process, removing impurities and filtering after the steaming is finished, cleaning filter residues by using clear water until the washing liquid is neutral, and drying at 105 ℃ to absolute dryness to obtain the wood fibers;
secondly, adding water and wood fiber into a reaction kettle, heating to 60-80 ℃, and performing pulping for 30-40min, wherein the mass ratio of the water to the wood fiber is 5-12:1-2 to obtain pulp;
adding a modifier into the slurry, stirring, uniformly mixing to make the slurry become viscous, heating to 90-100 ℃, and carrying out heat preservation treatment for 10-15 minutes, wherein the modifier consists of a polyacrylic ammonium salt dispersing agent, hydroxyethyl cellulose and an antibacterial agent; the mass ratio of the polyacrylic ammonium salt dispersant to the hydroxyethyl cellulose to the antibacterial agent is 1:1.5-1.8:2-3, and the mass ratio of the modifier to the slurry is 1: 18-20; adding an aluminum sulfate solution into the thickened slurry, and uniformly mixing, wherein the mass fraction of the aluminum sulfate solution is 11-15%, and the volume ratio of the aluminum sulfate solution to the thickened slurry is 1: 45-50;
fourthly, adjusting the temperature of the reaction kettle to 75-85 ℃, and carrying out papermaking treatment on the pulp processed in the third step to obtain a corrugated paper semi-finished product;
fifthly, soaking the semi-finished corrugated paper in a soaking solution at the temperature of 55-60 ℃ for 22-24h at a constant temperature, taking out, and drying at the temperature of 100-105 ℃ until the water content is less than 2% to obtain soaked corrugated paper;
sixthly, performing surface sizing treatment on the soaked corrugated paper by using a sizing agent, wherein the coating weight is 6-10g/m2；
Seventhly, putting the corrugated paper subjected to surface sizing into a drying cylinder with the temperature of 120-130 ℃ for drying until the water content is 3-6%, taking out the corrugated paper, and standing at room temperature for 22-24 hours to obtain the corrugated paper;
wherein, the soak solution in the fifth step is prepared by the following method:
1) drying sanguisorba officinalis roots, grinding into powder, sieving with a 200-mesh sieve, mixing sanguisorba officinalis root powder and 60% ethanol water solution in volume fraction according to the solid-to-liquid ratio of 1g:12-15mL, stirring uniformly, and performing ultrasonic extraction (ultrasonic extraction conditions: power of 300W, time of 40-45min), removing filter residue, collecting extract, concentrating the extract by using a rotary evaporator, and freeze-drying the concentrated solution by using a vacuum freeze dryer to obtain yellowish-brown liquid;
2) diluting the yellow-brown liquid with an ethanol aqueous solution with the volume fraction of 60% according to the volume ratio of 1:25 to obtain a soaking solution;
ultrasonic extraction is carried out on the sanguisorba officinalis roots by adopting an ethanol water solution, and active substances in the sanguisorba officinalis roots can be extracted to the maximum extent by controlling extraction parameters; the sanguisorba officinalis root extract contains more polyphenol compounds such as tannin, has the characteristics of environmental protection, no pollution to the environment, strong antibacterial capability and the like, and has certain functions of corrosion prevention and insect prevention; the semi-finished product of the corrugated paper is soaked by adopting the soaking solution, and the active ingredients in the sanguisorba root extracting solution can be combined with wood fibers through hydrogen bond action and electrostatic adsorption action, so that the corrosion resistance and the antibacterial performance of the corrugated paper are improved;
the sizing agent in the sixth step is prepared by the following method:
weighing a certain amount of oxidized starch in a reaction kettle, adding water into the reaction kettle, heating to 93-95 ℃, preserving heat for 20-24min, naturally cooling to ensure that the temperature of the mixture is 70-75 ℃, adding a styrene-acrylate copolymer into the reaction kettle, and stirring and mixing uniformly at the constant temperature of 70-75 ℃ to obtain a sizing agent;
wherein the mass concentration of the oxidized starch is 5.8-6.2%; the mass concentration of the styrene-acrylate copolymer is 8.5-9.2%;
the styrene-acrylate copolymer is added into the starch solution, and can perform cross-linking reaction with hydroxyl, so that the styrene-acrylate copolymer can perform chemical action with starch, and the binding force with the starch is improved; when the sizing agent is coated on the surface of the corrugated paper, the styrene-acrylate copolymer can also react with hydroxyl on wood fiber molecules to play a role in crosslinking, so that the bonding force between the starch coating and the surface of the corrugated paper is improved, the compactness of the formed adhesive coating can be improved, and the indexes of the corrugated paper, such as tensile strength, surface strength, stiffness and the like, can be improved;
the antibacterial agent is prepared by the following method:
s1, dissolving glutamic acid in an ethanol water solution (the volume ratio of ethanol to water in the ethanol water solution is 4:1) at 35-38 ℃ to prepare a glutamic acid solution with the mass fraction of 2.8%, mixing nano zinc oxide and the glutamic acid solution according to the proportion of 2g:3mL, heating to 55-60 ℃, reacting for 1.5-2h, naturally cooling to room temperature, filtering, adding filter residue into absolute ethanol according to the proportion of 1g:10mL, centrifuging at the speed of 5000r/min by using a high-speed centrifuge, taking a precipitate, repeating the operation for 4-5 times, and drying to obtain pretreated nano zinc oxide;
in the step, the-OH on the surface of the nano zinc oxide particle reacts with the-COOH on the glutamic acid molecule, so that the glutamic acid molecule is grafted on the surface of the nano zinc oxide particle through chemical bonding to form pretreated nano zinc oxide; glutamic acid contains two-COOH and one-NH on the molecule2two-COOH have different reactivity, only one-COOH on glutamic acid molecule is grafted with the nano-zinc oxide under the influence of steric hindrance and through the control of reaction conditions, so that-COOH and-NH are introduced on the surface of the pretreated nano-zinc oxide2A group;
s2, mixing the pretreated nano zinc oxide with absolute ethyl alcohol according to the solid-to-liquid ratio of 1g:2mL, adding 6g of cinnamaldehyde after ultrasonic dispersion for 25-30min, heating, reacting for 180-200min under the conditions of constant temperature of 60 ℃ and nitrogen, filtering when the reaction is finished, centrifugally washing for 3-4 times by using absolute ethyl alcohol, and drying for 22-24h at 60 ℃ to obtain the antibacterial agent;
wherein the mass ratio of the pretreated nano zinc oxide to the cinnamaldehyde is 16-18: 1;
aldehyde group on cinnamaldehyde molecule and-NH on modified nano zinc oxide molecule2The reaction is carried out, so that cinnamaldehyde molecules are grafted on the surface of the nano zinc oxide molecules through chemical bonding to form the antibacterial agent; the nano zinc oxide is an inorganic antibacterial agent, and the cinnamaldehyde is an organic antibacterial agent, so that the obtained antibacterial agent is an organic-inorganic composite antibacterial agent, so that the antibacterial agent has the advantages of inorganic and organic antibacterial agents, and has the characteristics of high antibacterial performance and difficult migration; in addition, by coating organic molecules on the surfaces of the nano zinc oxide particles, the agglomeration phenomenon among the inorganic nano particles can be improved, the compatibility between the inorganic nano particles and a polymer matrix can be enhanced,in addition, the antibacterial agent molecules contain-COOH capable of reacting with the wood fibers, and the chemical bond bonding force is larger than the electrostatic acting force and the hydrogen bond acting force, so that the bonding force between the antibacterial agent and the wood fibers can be improved, the migration resistance of the antibacterial agent molecules is improved, the antibacterial agent stably exists in the wood fibers of the corrugated paper, and the antibacterial effect is continuously and stably exerted.
Example 1
The production process of the anti-corrosion green environment-friendly corrugated paper comprises the following steps:
firstly, peeling off barks of trunks, crushing the trunks into fragments, putting the trunks into strong alkaline chemical solution according to the solid-to-liquid ratio of 1g:25mL, cooking for 110min, continuously stirring in the cooking process, removing impurities after cooking, filtering, washing filter residues with clear water until washing liquor is neutral, and drying at 105 ℃ until the trunks are completely dried to obtain wood fibers;
secondly, adding water and wood fiber into a reaction kettle together, heating to 60 ℃, and performing pulping treatment for 30min, wherein the mass ratio of the water to the wood fiber is 5:1 to obtain pulp;
adding a modifier into the slurry, stirring, uniformly mixing to make the slurry become viscous, heating to 90 ℃, and carrying out heat preservation treatment for 10 minutes, wherein the modifier consists of a polyacrylic ammonium salt dispersing agent, hydroxyethyl cellulose and an antibacterial agent; the mass ratio of the polyacrylic ammonium salt dispersant to the hydroxyethyl cellulose to the antibacterial agent is 1:1.5:2, and the mass ratio of the modifier to the slurry is 1: 18; adding an aluminum sulfate solution into the thickened slurry, and uniformly mixing, wherein the mass fraction of the aluminum sulfate solution is 11%, and the volume ratio of the aluminum sulfate solution to the thickened slurry is 1: 45;
fourthly, adjusting the temperature of the reaction kettle to 75 ℃, and carrying out papermaking treatment on the pulp processed in the third step to obtain a corrugated paper semi-finished product;
fifthly, soaking the semi-finished corrugated paper in a soaking solution at the temperature of 55 ℃ for 22 hours at a constant temperature, taking out the semi-finished corrugated paper, and drying the semi-finished corrugated paper at the temperature of 100 ℃ until the water content is less than 2% to obtain soaked corrugated paper;
sixthly, performing surface preparation on the soaked corrugated paper through a sizing agentSurface sizing treatment, the coating weight is 6g/m2；
And seventhly, drying the corrugated paper subjected to surface sizing in a drying cylinder at 120 ℃ until the water content is 3%, taking out, and standing at room temperature for 22 hours to obtain the corrugated paper.
Example 2
The production process of the anti-corrosion green environment-friendly corrugated paper comprises the following steps:
firstly, peeling off barks of trunks, crushing the trunks into fragments, putting the trunks into strongly alkaline chemical solution according to the solid-to-liquid ratio of 1g:28mL, cooking for 115min, continuously stirring in the cooking process, removing impurities after cooking, filtering, washing filter residues with clear water until washing liquor is neutral, and drying at 105 ℃ until the trunks are completely dried to obtain wood fibers;
secondly, adding water and wood fiber into a reaction kettle together, heating to 70 ℃, and performing pulp grinding for 35min, wherein the mass ratio of the water to the wood fiber is 9:1.5, so as to obtain pulp;
adding a modifier into the slurry, stirring, uniformly mixing to make the slurry become viscous, heating to 95 ℃, and carrying out heat preservation treatment for 12 minutes, wherein the modifier consists of a polyacrylic ammonium salt dispersing agent, hydroxyethyl cellulose and an antibacterial agent; the mass ratio of the polyacrylic ammonium salt dispersant to the hydroxyethyl cellulose to the antibacterial agent is 1:1.7:2.5, and the mass ratio of the modifier to the slurry is 1: 19; adding an aluminum sulfate solution into the thickened slurry, and uniformly mixing, wherein the mass fraction of the aluminum sulfate solution is 13%, and the volume ratio of the aluminum sulfate solution to the thickened slurry is 1: 48;
fourthly, adjusting the temperature of the reaction kettle to 80 ℃, and carrying out papermaking treatment on the pulp processed in the third step to obtain a corrugated paper semi-finished product;
fifthly, soaking the semi-finished corrugated paper in a soaking solution at the temperature of 58 ℃ for 23 hours at a constant temperature, taking out, and drying at 103 ℃ until the water content is less than 2% to obtain soaked corrugated paper;
sixthly, performing surface sizing treatment on the soaked corrugated paper through a sizing agent, wherein the coating weight is 8g/m2；
And seventhly, drying the corrugated paper subjected to surface sizing in a drying cylinder at 125 ℃ until the water content is 4.5%, taking out, and standing at room temperature for 23 hours to obtain the corrugated paper.
Example 3
The production process of the anti-corrosion green environment-friendly corrugated paper comprises the following steps:
firstly, peeling off barks of trunks, crushing the trunks into fragments, putting the trunks into strong alkaline chemical solution according to the solid-to-liquid ratio of 1g:30mL, cooking for 120min, continuously stirring in the cooking process, removing impurities after cooking, filtering, washing filter residues with clear water until washing liquor is neutral, and drying at 105 ℃ to be absolutely dry to obtain wood fibers;
secondly, adding water and wood fiber into a reaction kettle together, heating to 80 ℃, and performing pulping treatment for 40min, wherein the mass ratio of the water to the wood fiber is 12:2 to obtain pulp;
adding a modifier into the slurry, stirring, uniformly mixing to make the slurry become viscous, heating to 100 ℃, and carrying out heat preservation treatment for 15 minutes, wherein the modifier consists of a polyacrylic ammonium salt dispersing agent, hydroxyethyl cellulose and an antibacterial agent; the mass ratio of the polyacrylic ammonium salt dispersant to the hydroxyethyl cellulose to the antibacterial agent is 1:1.8:3, and the mass ratio of the modifier to the slurry is 1: 20; adding an aluminum sulfate solution into the thickened slurry, and uniformly mixing, wherein the mass fraction of the aluminum sulfate solution is 15%, and the volume ratio of the aluminum sulfate solution to the thickened slurry is 1: 50;
fourthly, adjusting the temperature of the reaction kettle to 85 ℃, and carrying out papermaking treatment on the pulp processed in the third step to obtain a corrugated paper semi-finished product;
fifthly, soaking the semi-finished corrugated paper in a soaking solution at the temperature of 60 ℃ for 22-24 hours at a constant temperature, taking out, and drying at 105 ℃ until the water content is less than 2% to obtain soaked corrugated paper;
sixthly, performing surface sizing treatment on the soaked corrugated paper through a sizing agent, wherein the coating weight is 10g/m2；
And seventhly, drying the corrugated paper subjected to surface sizing in a drying cylinder at 130 ℃ until the water content is 6%, taking out, and standing at room temperature for 24 hours to obtain the corrugated paper.
Comparative example 1
The antibacterial agent in the third step in the example 1 is replaced by the common nano zinc oxide, and the rest raw materials and the preparation process are not changed.
Comparative example 2
The raw materials of the antibacterial agent in the third step in example 1 were removed, and the rest of the raw materials and the preparation process were unchanged.
Comparative example 3
The fifth step of example 1 was eliminated and the remaining raw materials and preparation were unchanged.
Comparative example 4
The styrene-acrylate copolymer raw material in the sizing agent of the sixth step in the example 1 is removed, and the rest of the raw materials and the preparation process are unchanged.
The corrugated papers obtained in examples 1 to 3 and comparative examples 1 to 4 were subjected to the following performance tests:
the burst strength was tested according to GB/T6545-1998; testing the waterproof performance according to GB/T19250-2013 under the test condition of 0.3 MPa; testing the bacteriostasis rates of staphylococcus aureus, escherichia coli, bacillus subtilis and aspergillus; the test results are shown in table 1 below:
TABLE 1
Figure BDA0002660590550000131
As is clear from Table 1 above, the corrugated sheets obtained in examples 1 to 3 had a bursting strength of 10.92 to 10.98kgf cm-2Under the condition of 0.3MPa/120min, no water permeability exists, which shows that the corrugated paper prepared by the invention has higher mechanical property and waterproof property; the bacteriostasis rates of the corrugated paper prepared in the embodiments 1-3 on staphylococcus aureus, escherichia coli, bacillus subtilis and aspergillus are all over 99.5%, which shows that the corrugated paper prepared by the invention has extremely high antibacterial and mildew-proof performances and good corrosion resistance; the invention is described by combining comparative example 1, the self-made antibacterial agent is an organic-inorganic composite antibacterial agent which has extremely high self-performanceThe nano zinc oxide is modified, so that the uniform dispersion of the nano zinc oxide can be promoted, the binding force with wood fibers can be improved, and the antibacterial effect and the antibacterial durability can be improved; the combination of comparative example 2 shows that the corrugated paper has good antibacterial performance by adding the antibacterial agent into the wood pulp; by combining the comparative example 3, the antibacterial performance of the corrugated paper can be further improved by soaking the semi-finished corrugated paper by the sanguisorba officinalis root extract; the comparison example 4 is combined to show that the addition of the styrene-acrylate copolymer into the sizing agent can not only improve the bonding performance of the sizing agent, but also improve the chemical bonding effect between the sizing agent and the surface of the corrugated paper, improve the bonding force between the adhesive and the corrugated paper and the compactness of a coating of the sizing agent, and further improve the waterproof performance and the mechanical strength of the corrugated paper.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims (9)

1. The production process of the anti-corrosion green environment-friendly corrugated paper is characterized by comprising the following steps of:
firstly, peeling off barks of trunks, crushing the trunks into fragments, putting the trunks into strong alkaline chemical solution according to the solid-to-liquid ratio of 1g:25-30mL for cooking for 110-120min, continuously stirring in the cooking process, removing impurities and filtering after the cooking is finished, cleaning filter residues with clear water until the washing liquid is neutral, and drying at 105 ℃ until the filter residues are completely dried to obtain wood fibers;
secondly, adding water and wood fiber into a reaction kettle, heating to 60-80 ℃, and performing pulping for 30-40min, wherein the mass ratio of the water to the wood fiber is 5-12:1-2 to obtain pulp;
thirdly, adding a modifier into the slurry, stirring, uniformly mixing to make the slurry become viscous, heating to 90-100 ℃, carrying out heat preservation treatment for 10-15 minutes, wherein the mass ratio of the modifier to the slurry is 1:18-20, then adding an aluminum sulfate solution into the viscous slurry, and uniformly mixing;
wherein the mass fraction of the aluminum sulfate solution is 11-15%, and the ratio of the volume of the aluminum sulfate solution to the volume of the thickened slurry is 1: 45-50;
fourthly, adjusting the temperature of the reaction kettle to 75-85 ℃, and carrying out papermaking treatment on the pulp processed in the third step to obtain a corrugated paper semi-finished product;
fifthly, soaking the semi-finished corrugated paper in a soaking solution at the temperature of 55-60 ℃ for 22-24h at a constant temperature, taking out, and drying at the temperature of 100-105 ℃ until the water content is less than 2% to obtain soaked corrugated paper;
sixthly, performing surface sizing treatment on the soaked corrugated paper by using a sizing agent, wherein the coating weight is 6-10g/m2；
And seventhly, drying the corrugated paper subjected to surface sizing in a drying cylinder at the temperature of 120-130 ℃ until the water content is 3-6%, taking out, and standing at room temperature for 22-24 hours to obtain the corrugated paper.
2. The process for producing corrugated paper with corrosion protection and environmental protection as claimed in claim 1, wherein the strong alkaline chemical solution in the first step is a mixed solution of sodium hydroxide and sulfite, and the mass fractions of sodium hydroxide and sulfite in the strong alkaline chemical solution are 8.5% and 5.2%, respectively.
3. The process for producing the anti-corrosion green and environment-friendly corrugated paper as claimed in claim 1, wherein in the third step, the modifier is composed of a polyacrylic ammonium salt dispersant, hydroxyethyl cellulose and an antibacterial agent, and the mass ratio of the polyacrylic ammonium salt dispersant to the hydroxyethyl cellulose to the antibacterial agent is 1:1.5-1.8: 2-3.
4. The process for producing the anti-corrosion green and environment-friendly corrugated paper as claimed in claim 3, wherein the anti-bacterial agent is prepared by the following method:
s1, dissolving glutamic acid in an ethanol aqueous solution at 35-38 ℃ to prepare a glutamic acid solution with the mass fraction of 2.8%, mixing nano zinc oxide and the glutamic acid solution according to the proportion of 2g:3mL, heating to 55-60 ℃, reacting for 1.5-2h, naturally cooling to room temperature, filtering, adding filter residue into absolute ethyl alcohol according to the proportion of 1g:10mL, centrifuging at the speed of 5000r/min by adopting a high-speed centrifuge, taking a precipitate, repeating the operation for 4-5 times, and drying to obtain pretreated nano zinc oxide;
s2, mixing the pretreated nano zinc oxide with absolute ethyl alcohol according to the solid-to-liquid ratio of 1g:2mL, adding 6g of cinnamaldehyde after ultrasonic dispersion for 25-30min, heating, reacting for 180-24 min under the conditions of constant temperature of 60 ℃ and nitrogen, filtering when the reaction is finished, centrifugally washing for 3-4 times by using absolute ethyl alcohol, and drying for 22-24h at 60 ℃ to obtain the antibacterial agent.
5. The process for producing the anti-corrosion green and environment-friendly corrugated paper as claimed in claim 4, wherein in the step S1, the volume ratio of ethanol to water in the ethanol aqueous solution is 4: 1; in the step S2, the mass ratio of the pretreated nano zinc oxide to the cinnamaldehyde is 16-18: 1.
6. The process for producing the anti-corrosion green and environment-friendly corrugated paper as claimed in claim 1, wherein the soaking solution in the fifth step is prepared by the following method:
1) drying sanguisorba officinalis roots, grinding into powder, sieving with a 200-mesh sieve, mixing sanguisorba officinalis root powder and 60% ethanol aqueous solution according to a solid-to-liquid ratio of 1g:12-15mL, stirring uniformly, carrying out ultrasonic extraction, removing filter residues, collecting an extracting solution, concentrating the extracting solution by using a rotary evaporator, and freeze-drying the concentrated solution by using a vacuum freeze-dryer to obtain a yellowish-brown liquid;
2) diluting the yellowish-brown liquid with 60% ethanol aqueous solution according to the volume ratio of 1:25 to obtain a soaking solution.
7. The process for producing the anti-corrosion green and environment-friendly corrugated paper as claimed in claim 6, wherein the ultrasonic extraction conditions in the step 1) are as follows: the power is 300W, and the time is 40-45 min.
8. The process for producing anti-corrosion green and environment-friendly corrugated paper as claimed in claim 1, wherein the sizing agent in the sixth step is prepared by the following method:
weighing a certain amount of oxidized starch in a reaction kettle, adding water into the reaction kettle, heating to 93-95 ℃, preserving heat for 20-24min, naturally cooling to ensure that the temperature of the mixture is 70-75 ℃, adding a styrene-acrylate copolymer into the reaction kettle, and stirring and mixing uniformly at the constant temperature of 70-75 ℃ to obtain the sizing agent.
9. The process for producing anti-corrosion green and environment-friendly corrugated paper as claimed in claim 8, wherein the mass concentration of the oxidized starch in the sizing agent is 5.8-6.2%, and the mass concentration of the styrene-acrylate copolymer is 8.5-9.2%.
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