CN111109253A - Preparation method of antibacterial material for papermaking - Google Patents
Preparation method of antibacterial material for papermaking Download PDFInfo
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- CN111109253A CN111109253A CN201911326481.4A CN201911326481A CN111109253A CN 111109253 A CN111109253 A CN 111109253A CN 201911326481 A CN201911326481 A CN 201911326481A CN 111109253 A CN111109253 A CN 111109253A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/08—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing solids as carriers or diluents
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/08—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing solids as carriers or diluents
- A01N25/10—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
- C08B37/0006—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid
- C08B37/0024—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid beta-D-Glucans; (beta-1,3)-D-Glucans, e.g. paramylon, coriolan, sclerotan, pachyman, callose, scleroglucan, schizophyllan, laminaran, lentinan or curdlan; (beta-1,6)-D-Glucans, e.g. pustulan; (beta-1,4)-D-Glucans; (beta-1,3)(beta-1,4)-D-Glucans, e.g. lichenan; Derivatives thereof
- C08B37/0027—2-Acetamido-2-deoxy-beta-glucans; Derivatives thereof
- C08B37/003—Chitin, i.e. 2-acetamido-2-deoxy-(beta-1,4)-D-glucan or N-acetyl-beta-1,4-D-glucosamine; Chitosan, i.e. deacetylated product of chitin or (beta-1,4)-D-glucosamine; Derivatives thereof
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- Agronomy & Crop Science (AREA)
- Plant Pathology (AREA)
- Dentistry (AREA)
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- Pest Control & Pesticides (AREA)
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- Materials Engineering (AREA)
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Abstract
The invention discloses a preparation method of an antibacterial material for papermaking, which specifically comprises the following steps: s1, sequentially adding chitosan, hinokitiol and sorbic acid into a reaction kettle, heating to 100 ℃, melting materials in the reaction kettle, uniformly stirring by a stirrer during melting, adding appropriate water according to conditions, preparing a connecting agent after stirring, and standing for later use; s2, coating the ceramic slurry or powder with polymer, such as polyurethane three-dimensional network foam, by using the methods of infiltration, vapor deposition, electric spraying and the like, removing the polymer network foam through the processes of drying, pyrolysis and sintering, and enabling the ceramic particles to have densification reaction. According to the preparation method of the antibacterial material for papermaking, natural raw materials are used as the antibacterial material, the overall environmental protection performance is improved, the overall safety is high, the application range is wide, the paper can be well sterilized in the preparation process, and the bacterial pollution is avoided.
Description
Technical Field
The invention relates to the technical field of antibacterial materials, in particular to a preparation method of an antibacterial material for papermaking.
Background
The antibacterial material is a novel functional material with the function of killing or inhibiting microorganisms, a plurality of substances in the nature have good functions of killing or inhibiting microorganisms, such as organic compounds, some inorganic metal materials and compounds thereof, partial mineral substances and natural substances with specific groups, the antibacterial material is widely applied and also widely applied in the paper making industry, paper products are already applied in the aspects of modern life, a great number of the paper products are directly contacted with human bodies in daily life, most of the paper products are made of natural fibers and are easily damaged by bacteria, particularly, after paper is wetted, fiber macromolecular structures are easily hydrolyzed by enzyme secreted by the bacteria to release nutrient substances, so that the bacteria are proliferated and proliferated, the antibacterial material is required to be used in the paper making process, but the existing antibacterial material is complex in preparation raw materials, and the cost is high, and the paper is not suitable for the antibiosis of the paper.
Traditional antibacterial material for papermaking can not use some natural raw materials as antibacterial material, has reduced holistic feature of environmental protection, and whole security is not high, application scope is low, can not carry out fine disinfecting in the preparation of paper, causes the pollution of bacterium easily, and the preparation raw materials is simple enough easily, has increased producer's cost, and whole step is loaded down with trivial details, has increased staff's intensity of labour
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a preparation method of an antibacterial material for papermaking, and solves the problems of high cost and complicated steps of the preparation method of the antibacterial material for papermaking.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a preparation method of an antibacterial material for papermaking is characterized by comprising the following steps: the method specifically comprises the following steps:
s1, sequentially adding chitosan, hinokitiol and sorbic acid into a reaction kettle, heating to 100 ℃, melting materials in the reaction kettle, uniformly stirring by a stirrer during melting, adding appropriate water according to conditions, preparing a connecting agent after stirring, and standing for later use;
s2, coating a polymer such as polyurethane three-dimensional reticulated foam on the ceramic slurry or ceramic powder by adopting methods such as infiltration, vapor deposition, electric spraying and the like, removing the polymer reticulated foam through drying, pyrolysis and sintering processes, and enabling ceramic particles to carry out densification reaction, thereby obtaining the ceramic with a three-dimensional through porous structure similar to the polymer reticulated foam, namely preparing an inorganic carrier material, and then placing for later use;
s3, reacting the connecting agent reserved in the S1 and the inorganic carrier material reserved in the S2 in the aqueous solution at the temperature of 50-100 ℃ for 2-4 hours, and obtaining the inorganic carrier material of the grafted connecting agent after molding;
s4, filtering and separating the inorganic carrier material of the grafting connecting agent, washing with distilled water, washing with an organic solvent, reacting the inorganic carrier material of the grafting connecting agent and the organic antibacterial agent in water at 50-100 ℃ for 3-6 hours, and filtering to obtain the inorganic carrier material of the grafting organic antibacterial agent;
s5, oscillating the inorganic carrier material grafted with the organic antibacterial agent at the oscillation speed of 200-400 r/min for 20 hours, centrifuging the obtained product, drying at 80 ℃, removing impurities on the surface of the material after drying, and continuously screening until no impurities exist, thus obtaining the functionalized inorganic antibacterial material.
Preferably, the linking agent is 10% to 70% by weight of the inorganic carrier material.
Preferably, the inorganic support material in S2 is a porous inorganic material, and the pore diameter is 0.05-10 μm.
Preferably, the organic solvent in S4 is any one of acetone or ethanol.
Preferably, the preparation method of chitosan in S1 comprises the steps of adding chitosan into an aqueous solution containing a cross-linking agent, adding concentrated hydrochloric acid, stirring and reacting for 1-1.5h at 80 ℃, filtering, washing filter residue with distilled water until filtrate is neutral, adding the filter residue into an aqueous solution containing an oxidizing agent, stirring and reacting for 1-3h at 60-100 ℃, filtering, washing the filter residue with distilled water until filtrate is neutral, adding the filter residue into an aqueous solution containing a metal compound, continuously stirring for 4-12h, filtering, washing the filter residue with distilled water until the filtrate is neutral, and thus obtaining the chitosan required in S1.
Preferably, in S5, when the inorganic carrier material grafted with the organic antibacterial agent is centrifuged, the centrifuge is stopped at regular time, and then the suspended matter on the surface layer of the liquid surface of the centrifuge is cleaned, and the centrifugation is continued until the amount of the suspended matter on the surface is very small.
Preferably, in S1, the appropriate amount of water added is determined according to the melting condition of the materials in the reaction kettle, and water needs to be added in time when dry pot occurs, so as to prevent dry pot during melting.
(III) advantageous effects
The invention provides a preparation method of an antibacterial material for papermaking. The method has the following beneficial effects:
(1) the preparation method of the antibacterial material for papermaking comprises the steps of sequentially adding chitosan, hinokitiol and sorbic acid into a reaction kettle through S1, then heating to 100 ℃, melting materials in the reaction kettle, uniformly stirring by a stirrer during melting, adding appropriate water according to conditions, preparing a connecting agent after stirring is finished, and then placing for later use; s2, coating a polymer such as polyurethane three-dimensional reticulated foam on the ceramic slurry or ceramic powder by adopting methods such as infiltration, vapor deposition, electric spraying and the like, removing the polymer reticulated foam through drying, pyrolysis and sintering processes, and enabling ceramic particles to carry out densification reaction, thereby obtaining the ceramic with a three-dimensional through porous structure similar to the polymer reticulated foam, namely preparing an inorganic carrier material, and then placing for later use; the paper has the advantages that some natural raw materials are used as antibacterial materials, the overall environmental protection performance is improved, the overall safety is high, the application range is wide, the paper can be well sterilized in the preparation process, the bacterial pollution is avoided, the preparation raw materials are simple and easy to obtain, and the cost of producers is reduced.
(2) The preparation method of the antibacterial material for papermaking comprises the steps of adding chitosan into an aqueous solution containing a cross-linking agent by using 10-70% of a connecting agent by weight of an inorganic carrier material, adding concentrated hydrochloric acid into the aqueous solution containing the cross-linking agent by using a porous inorganic material in S2 by using a porous inorganic material with a pore diameter of 0.05-10 microns, stirring and reacting for 1-1.5 hours at 80 ℃, filtering, washing filter residue with distilled water until the filtrate is neutral, adding the filter residue into an aqueous solution containing an oxidizing agent by using a stirring reaction for 1-3 hours at 60-100 ℃, filtering, washing the filter residue with distilled water until the filtrate is neutral, adding the filter residue into an aqueous solution containing a metal compound by using the distilled water, continuously stirring for 4-12 hours, filtering, washing the filter residue with distilled water until the filtrate is neutral, thus preparing the chitosan required in S1, and the whole steps are simple, the labor intensity of workers is reduced.
Drawings
FIG. 1 is a flow chart of an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious 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. Referring to fig. 1, an embodiment of the present invention provides a technical solution: a preparation method of an antibacterial material for papermaking specifically comprises the following steps:
s1, sequentially adding chitosan, hinokitiol and sorbic acid into a reaction kettle, heating to 100 ℃, then melting materials in the reaction kettle, uniformly stirring by a stirrer during melting, adding appropriate water according to conditions, and preparing a connecting agent after stirring is completed, and then placing for later use, wherein the application research of chitosan in various fields such as biochemical and biomedical engineering is greatly advanced, the research reports on the functions of chitosan in reducing blood fat and reducing blood sugar are provided for patients, sorbic acid is a white needle-shaped or powdery crystal, has an inhibiting effect on yeast, mould and a plurality of fungi, is a high-efficiency nontoxic antiseptic mildew inhibitor, and is used for human food, animal feed, cosmetics, medicines, packaging materials, rubber auxiliaries and the like;
s2, coating a polymer such as polyurethane three-dimensional reticulated foam on the ceramic slurry or ceramic powder by adopting methods such as infiltration, vapor deposition, electric spraying and the like, removing the polymer reticulated foam through drying, pyrolysis and sintering processes, and enabling ceramic particles to carry out densification reaction, thereby obtaining the ceramic with a three-dimensional through porous structure similar to the polymer reticulated foam, namely preparing an inorganic carrier material, and then placing for later use;
s3, reacting the connecting agent reserved in the S1 and the inorganic carrier material reserved in the S2 in the aqueous solution at the temperature of 50-100 ℃ for 2-4 hours, and obtaining the inorganic carrier material of the grafted connecting agent after molding;
s4, filtering and separating the inorganic carrier material of the grafting connecting agent, washing with distilled water, washing with an organic solvent, reacting the inorganic carrier material of the grafting connecting agent and the organic antibacterial agent in water at 50-100 ℃ for 3-6 hours, and filtering to obtain the inorganic carrier material of the grafting organic antibacterial agent;
s5, oscillating the inorganic carrier material grafted with the organic antibacterial agent at the oscillation speed of 200-400 r/min for 20 hours, centrifuging the obtained product, drying at 80 ℃, removing impurities on the surface of the material after drying, and continuously screening until no impurities exist, thus obtaining the functionalized inorganic antibacterial material.
In the invention, the connecting agent accounts for 10-70% of the weight of the inorganic carrier material.
In the invention, the inorganic carrier material in S2 is a porous inorganic material with the aperture of 0.05-10 microns, the inorganic porous material has the characteristics of large specific surface area, small density, small thermal conductivity, small relative density, large porosity and the like, and is mainly used as a catalyst, an adsorbent, heat preservation, heat insulation, sewage and waste gas treatment, liquid and gas filtration, light building materials, nitrogen dioxide and sulfur dioxide tail gas elimination in the atmosphere, carbon dioxide and water elimination in space ships, and can be used for improving soil in agriculture, and can also be used as a filler in cement, rubber, plastics and paper industry and the like for fixation in chromatography.
In the invention, the organic solvent in the S4 is any one of acetone or ethanol, the ethanol has wide application range, can be used for preparing acetic acid, beverage, essence, fuel and the like, and the ethanol with 70-75% of volume fraction is commonly used as a disinfectant in medical treatment.
The preparation method of chitosan in S1 comprises the steps of adding chitosan into an aqueous solution containing a cross-linking agent, adding concentrated hydrochloric acid, stirring and reacting for 1-1.5h at 80 ℃, filtering, washing filter residue with distilled water until filtrate is neutral, adding the filter residue into an aqueous solution containing an oxidizing agent, stirring and reacting for 1-3h at 60-100 ℃, filtering, washing the filter residue with distilled water until the filtrate is neutral, adding the filter residue into an aqueous solution containing a metal compound, continuously stirring for 4-12h, filtering, washing the filter residue with distilled water until the filtrate is neutral, and thus obtaining the chitosan required in S1.
In the present invention, in S5, when the inorganic carrier material grafted with the organic antibacterial agent is centrifuged, the centrifuge is stopped at regular time, then the suspended matter on the surface layer of the liquid surface of the centrifuge is cleaned, and the centrifuge is continued until the amount of the suspended matter on the surface is very small, wherein the centrifuge is a machine for separating each component from the liquid and solid particles or the mixture of the liquid and the liquid by using the centrifugal force, and the centrifugal force is determined by the magnitude and magnitude, the rotation speed, the rotation radius and the melting mass of the substance.
In the invention, in S1, proper water is added according to the situation that materials are melted in the reaction kettle, and when dry pan and other situations occur, water needs to be added in time to prevent dry pan during melting.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A preparation method of an antibacterial material for papermaking is characterized by comprising the following steps: the method specifically comprises the following steps:
s1, sequentially adding chitosan, hinokitiol and sorbic acid into a reaction kettle, heating to 100 ℃, melting materials in the reaction kettle, uniformly stirring by a stirrer during melting, adding appropriate water according to conditions, preparing a connecting agent after stirring, and standing for later use;
s2, coating a polymer such as polyurethane three-dimensional reticulated foam on the ceramic slurry or ceramic powder by adopting methods such as infiltration, vapor deposition, electric spraying and the like, removing the polymer reticulated foam through drying, pyrolysis and sintering processes, and enabling ceramic particles to carry out densification reaction, thereby obtaining the ceramic with a three-dimensional through porous structure similar to the polymer reticulated foam, namely preparing an inorganic carrier material, and then placing for later use;
s3, reacting the connecting agent reserved in the S1 and the inorganic carrier material reserved in the S2 in the aqueous solution at the temperature of 50-100 ℃ for 2-4 hours, and obtaining the inorganic carrier material of the grafted connecting agent after molding;
s4, filtering and separating the inorganic carrier material of the grafting connecting agent, washing with distilled water, washing with an organic solvent, reacting the inorganic carrier material of the grafting connecting agent and the organic antibacterial agent in water at 50-100 ℃ for 3-6 hours, and filtering to obtain the inorganic carrier material of the grafting organic antibacterial agent;
s5, oscillating the inorganic carrier material grafted with the organic antibacterial agent at the oscillation speed of 200-400 r/min for 20 hours, centrifuging the obtained product, drying at 80 ℃, removing impurities on the surface of the material after drying, and continuously screening until no impurities exist, thus obtaining the functionalized inorganic antibacterial material.
2. The method for preparing the antibacterial material for papermaking according to claim 1, characterized in that: the connecting agent accounts for 10-70% of the weight of the inorganic carrier material.
3. The method for preparing the antibacterial material for papermaking according to claim 1, characterized in that: the inorganic carrier material in the S2 is a porous inorganic material, and the pore diameter is 0.05-10 microns.
4. The method for preparing the antibacterial material for papermaking according to claim 1, characterized in that: the organic solvent in the S4 is any one of acetone or ethanol.
5. The method for preparing the antibacterial material for papermaking according to claim 1, characterized in that: the preparation method of the chitosan in S1 comprises the steps of adding chitosan into an aqueous solution containing a cross-linking agent, adding concentrated hydrochloric acid, stirring and reacting for 1-1.5 hours at 80 ℃, filtering, washing filter residue with distilled water until filtrate is neutral, adding the filter residue into an aqueous solution containing an oxidizing agent, stirring and reacting for 1-3 hours at 60-100 ℃, filtering, washing the filter residue with distilled water until the filtrate is neutral, adding the filter residue into an aqueous solution containing a metal compound, continuously stirring for 4-12 hours, filtering, washing the filter residue with distilled water until the filtrate is neutral, and thus obtaining the chitosan required in S1.
6. The method for preparing the antibacterial material for papermaking according to claim 1, characterized in that: in the step S5, when the inorganic carrier material grafted with the organic antibacterial agent is centrifuged, the centrifuge needs to be stopped at regular time, then the suspended matters on the surface layer of the liquid level of the centrifuge are cleaned, and the centrifuge is continued to be centrifuged until the amount of the suspended matters on the surface is very small.
7. The method for preparing the antibacterial material for papermaking according to claim 1, characterized in that: in S1, proper water is added according to the situation that the materials are melted in the reaction kettle, and water needs to be added in time when situations such as a dry pot occur, so that the dry pot is prevented from being melted.
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Application publication date: 20200508 |