CN116556111A - Method for preparing antibacterial oil-resistant performance packaging paper by using waste cotton textiles - Google Patents
Method for preparing antibacterial oil-resistant performance packaging paper by using waste cotton textiles Download PDFInfo
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- CN116556111A CN116556111A CN202310036345.1A CN202310036345A CN116556111A CN 116556111 A CN116556111 A CN 116556111A CN 202310036345 A CN202310036345 A CN 202310036345A CN 116556111 A CN116556111 A CN 116556111A
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- waste cotton
- cotton textiles
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- antibacterial
- oil
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- 229920000742 Cotton Polymers 0.000 title claims abstract description 66
- 239000004753 textile Substances 0.000 title claims abstract description 65
- 239000002699 waste material Substances 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 39
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 32
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 26
- 239000000835 fiber Substances 0.000 claims abstract description 54
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229910001424 calcium ion Inorganic materials 0.000 claims abstract description 39
- 239000000243 solution Substances 0.000 claims abstract description 25
- 238000004061 bleaching Methods 0.000 claims abstract description 23
- 229920002873 Polyethylenimine Polymers 0.000 claims abstract description 14
- 239000011259 mixed solution Substances 0.000 claims abstract description 10
- 239000003513 alkali Substances 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 8
- 238000010907 mechanical stirring Methods 0.000 claims abstract description 7
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 230000001590 oxidative effect Effects 0.000 claims abstract description 6
- 238000007873 sieving Methods 0.000 claims abstract description 6
- 238000002791 soaking Methods 0.000 claims abstract description 6
- 238000010025 steaming Methods 0.000 claims abstract description 6
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 28
- 239000002994 raw material Substances 0.000 claims description 15
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims description 14
- 229910001431 copper ion Inorganic materials 0.000 claims description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- GDOPTJXRTPNYNR-UHFFFAOYSA-N methyl-cyclopentane Natural products CC1CCCC1 GDOPTJXRTPNYNR-UHFFFAOYSA-N 0.000 claims description 10
- 230000003647 oxidation Effects 0.000 claims description 10
- 238000007254 oxidation reaction Methods 0.000 claims description 10
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 2
- 238000009736 wetting Methods 0.000 claims description 2
- 229910021645 metal ion Inorganic materials 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 4
- 150000002500 ions Chemical class 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 238000004537 pulping Methods 0.000 abstract description 2
- 230000003115 biocidal effect Effects 0.000 abstract 1
- 238000010298 pulverizing process Methods 0.000 abstract 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 11
- 229920002678 cellulose Polymers 0.000 description 6
- 239000001913 cellulose Substances 0.000 description 6
- 238000004064 recycling Methods 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000010718 Oxidation Activity Effects 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 239000002585 base Substances 0.000 description 4
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 4
- 230000002708 enhancing effect Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 3
- 239000001110 calcium chloride Substances 0.000 description 3
- 229910001628 calcium chloride Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 239000000975 dye Substances 0.000 description 3
- 238000001878 scanning electron micrograph Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 229920001046 Nanocellulose Polymers 0.000 description 2
- 241000191967 Staphylococcus aureus Species 0.000 description 2
- 239000000980 acid dye Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 239000000981 basic dye Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000009920 chelation Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000000982 direct dye Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- JHJLBTNAGRQEKS-UHFFFAOYSA-M sodium bromide Chemical compound [Na+].[Br-] JHJLBTNAGRQEKS-UHFFFAOYSA-M 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- SJEYSFABYSGQBG-UHFFFAOYSA-M Patent blue Chemical compound [Na+].C1=CC(N(CC)CC)=CC=C1C(C=1C(=CC(=CC=1)S([O-])(=O)=O)S([O-])(=O)=O)=C1C=CC(=[N+](CC)CC)C=C1 SJEYSFABYSGQBG-UHFFFAOYSA-M 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229940043430 calcium compound Drugs 0.000 description 1
- 150000001674 calcium compounds Chemical class 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- -1 iron ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
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
- D21H27/10—Packing paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/001—Modification of pulp properties
- D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
- D21C9/004—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives inorganic compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/001—Modification of pulp properties
- D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
- D21C9/005—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives organic compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/001—Modification of pulp properties
- D21C9/007—Modification of pulp properties by mechanical or physical means
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/16—Bleaching ; Apparatus therefor with per compounds
- D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
-
- 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
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/24—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
-
- 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
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Pest Control & Pesticides (AREA)
- Paper (AREA)
Abstract
The invention belongs to the technical field of pulping and papermaking, and particularly relates to a method for preparing packaging paper with antibacterial and oil-resistant properties by using waste cotton textiles, which comprises the following steps: soaking waste cotton textiles in alkali liquor, filtering, steaming in alkali liquor, squeezing, pulverizing, and sieving; bleaching treatment is carried out; oxidizing the bleached product fibers, separating the fibers, and performing further mechanical treatment until the fibers are completely dispersed to nanometer size; adding a calcium ion solution under the condition of mechanical stirring; adding polyethylenimine to make the fiber mixed solution positively charged; and (3) dripping the obtained mixture on the surface of the paper, uniformly coating by using a coater, and airing to obtain the paper. The invention shortens the process flow of preparing the waste cotton textiles, saves the cost of treating the waste cotton textiles, and fully utilizes the possible heavy metal ions in the waste cotton textiles to convert the waste cotton textiles into new materials which can be used for antibiosis; solves the problem of metal ion treatment and improves the utilization of metal ions.
Description
Technical Field
The invention belongs to the technical field of pulping and papermaking, and particularly relates to a method for preparing packaging paper with antibacterial and oil-resistant properties by using waste cotton textiles.
Background
With the improvement of the living standard of people, the development of textile industry and the great abundance of substances, the consumption of people to clothing is rapidly improved, so that the service cycle of textiles is shortened, and the quantity of waste textiles is continuously increased. The annual production of waste textiles in the world is counted to be approaching the hundred million ton scale. At present, most of waste textiles are still burnt and buried, so that not only is the resource wasted, but also a great deal of environmental pollution is generated, and the recycling of the waste textiles becomes a key problem of concern.
China is a country with large cotton yield in the world, and cotton fiber is one of the most important textile raw materials and is also the natural fiber with the highest yield. Cotton fiber has the characteristics of good moisture absorption and air permeability, excellent hand feeling, strength and the like, and is popular with people. Therefore, pure cotton and cotton-containing textiles account for a large proportion of waste textiles. In recent years, with the enhancement of environmental awareness, the recycling of cotton fabrics and cotton yarns has attracted great attention both at home and abroad.
Since the waste cotton textiles contain a large amount of dye; the main dyes present are acid dyes, basic dyes, direct dyes, etc. Wherein the acid dye and the basic dye are combined with the textile through non-covalent bond, and the direct dye is connected with the active group of the textile through covalent bond, which causes great difficulty in decoloring and utilizing the waste cotton textile. In addition, textiles also contain various dyeing aids, metal ions and the like. These problems cause certain difficulties in recycling waste cotton textiles.
Therefore, the recycling process is designed according to the characteristics of the waste cotton textile raw materials; there is a need to develop a recycling method for the raw material characteristics of waste cotton textiles.
Disclosure of Invention
Aiming at the problem that the dye and metal ions in the raw materials are high in residue in the recycling process of the waste cotton textiles, the invention provides a scheme capable of realizing rapid bleaching of fibers in the waste cotton textiles and preparation of high-performance antibacterial materials by utilizing the residual metal ions in the fibers, so as to shorten the treatment process flow of the waste cotton textiles, improve the regeneration efficiency of the waste cotton textiles and improve the economic benefit of comprehensive utilization of the waste cotton textiles.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a method for preparing a packaging paper with antibacterial and oil-resistant properties by using waste cotton textiles comprises the following process steps:
(1) Disassembling waste cotton textiles, adding the waste cotton textiles into alkali liquor (preferably sodium hydroxide or potassium hydroxide) with the mass fraction of 0.04% -1%, soaking for one night at normal temperature, filtering for later use, steaming the treated waste cotton fibers for 1 hour at 40-120 ℃ in the alkali liquor with the mass fraction of 0.04-1%, and finally squeezing, crushing and sieving pulp obtained by treating the waste cotton textiles to obtain a required primary raw material;
(2) Adding copper ions as a catalyst, bleaching the pulp obtained in the step (1) by utilizing hydrogen peroxide under the condition of pH3-6 to obtain a primary bleaching product, and adjusting the solution to be alkaline and then squeezing for standby;
(3) Oxidizing the fiber by using a TEMPO oxidation method, mixing the squeezed pulp with a TEMPO reagent and sodium bromide (the solid content of the fiber is not higher than 1%), fully stirring and uniformly mixing, adding sodium hypochlorite, keeping the pH of the solution in the range of 10-11 in the process, reacting for not less than 3 hours under mechanical stirring, adding ethanol to terminate the reaction, adjusting the pH to 7-8, separating the fiber, and performing further mechanical treatment until the fiber is completely dispersed and the transparency is not strengthened;
(4) Adding calcium ion solution under the condition of mechanical stirring after dispersing the fibers, wherein the strength of chelation of calcium ions and carboxyl is greater than that of hydrogen bonds among the fibers, the chelation of carboxyl and calcium ions is used for enhancing the strength of a network structure among fiber molecules, the amount of the added calcium ions is related to the fiber raw materials, the viscosity of the fibers needs to be controlled before the viscosity of the fibers begins to increase, the enhancement of the strength of the network structure is not obvious due to the fact that the concentration of the calcium ions is too low, the network structure is loose due to the fact that the concentration of the calcium ions is too high, and the control of oleophobicity is not facilitated;
(5) Continuously mechanically stirring and adding polyethyleneimine, wherein on one hand, the polyethyleneimine is a positively charged polymer, so that the antibacterial property of the paper can be enhanced; on the other hand, the addition of polyethyleneimine can neutralize the positive charges carried by the fibers, which is beneficial to the uniform coating of the prepared fiber dispersion liquid on the surface of paper;
(6) Dripping the mixed solution on the surface of paper, uniformly coating by using a coater, and airing at normal temperature and normal pressure;
(7) The paper is wetted by water and then dried, so that the phenomenon of uneven surface is prevented.
In the invention, heavy metal ions pass through carboxyl groups in cellulose and-N-, -NH in polyethyleneimine 2 Is fixed in the paper coating raw material and finally coated on the surface of the paper. When bacteria come into contact with the surface of paper, heavy metal ions can exert an antibacterial effect by disrupting the integrity of the bacterial cell membrane.
The calcium compounds that can provide the calcium ion solution are: and compounds such as calcium chloride and calcium nitrate, wherein the aqueous solution of the compounds contains free calcium ions, and the free calcium ions can be complexed with carboxyl groups in cellulose after TEMPO oxidation. The concentration of the calcium ions is 0.05-0.2M.
The amount of the polyethyleneimine is based on the fact that the fiber mixture is positively charged, and the specific amount is about: 0.5-1g/mL.
Copper ions are added as a catalyst during bleaching treatment, fenton is utilized to catalyze hydrogen peroxide to generate hydroxyl radicals, and the oxidation activity of the hydroxyl radicals is far greater than that of the hydrogen peroxide, so that the bleaching effect is better. The specific dosage of copper ions is as follows: the concentration in the final reaction solution is 0.5-2mg/L.
Advantageous effects
The invention discloses a method for preparing packaging paper with antibacterial and oil-resistant properties by using waste cotton textiles, which shortens the process flow of the preparation of the waste cotton textiles, saves the cost of the treatment of the waste cotton textiles, and fully utilizes the possible heavy metal ions (such as iron ions, calcium ions and the like) in the waste cotton textiles to convert the waste cotton textiles into new materials which can be used for antibacterial properties by using the waste cotton textiles for preparing the packaging paper with antibacterial and oil-resistant properties; solves the problem of metal ion treatment and improves the utilization of metal ions.
The hydroxyl on the surface of the fiber is converted into carboxyl, so that the hydrophilic and oleophobic properties of cellulose are improved, the fiber can form a nano cellulose structure with smaller size in the oxidation and mechanical dispersion processes of the fiber, the nano cellulose structure can be filled in pores on the surface of paper, the surface roughness of the paper is reduced, and the barrier property of the paper is improved; the addition of calcium ions further increases the compactness of the intermolecular network structure of the fibers, so that the oleophobic performance of the paper surface is further improved.
Drawings
Fig. 1: the surface macro topography of the antibacterial oil resistance performance packaging paper is shown in the figure;
fig. 2: SEM image of base paper;
fig. 3: SEM image of the antibacterial oil resistance performance packaging paper;
fig. 4: inhibition zone diagram for inhibiting staphylococcus aureus growth by paper.
Detailed Description
Hereinafter, the present invention will be described in detail. Before the description, it is to be understood that the terms used in this specification and the appended claims should not be construed as limited to general and dictionary meanings, but interpreted based on the meanings and concepts corresponding to technical aspects of the present invention on the basis of the principle that the inventor is allowed to define terms appropriately for the best explanation. Accordingly, the description set forth herein is merely a preferred example for the purpose of illustration and is not intended to limit the scope of the invention, so that it should be understood that other equivalents or modifications may be made thereto without departing from the spirit and scope of the invention.
The following examples are merely illustrative of embodiments of the present invention and are not intended to limit the invention in any way, and those skilled in the art will appreciate that modifications may be made without departing from the spirit and scope of the invention. Unless otherwise specified, reagents and equipment used in the following examples are commercially available products.
Example 1
A method for preparing a packaging paper with antibacterial and oil-resistant properties by using waste cotton textiles comprises the following process steps:
(1) The method comprises the steps of (1) disassembling waste cotton textiles, adding the waste cotton textiles into a 0.04% sodium hydroxide solution, soaking for one night at normal temperature, filtering to dry for later use, then steaming the treated waste cotton fibers in the 0.04% sodium hydroxide solution at 40 ℃ for 1 hour, and finally squeezing, crushing and sieving pulp obtained by treating the waste cotton textiles to obtain a required primary raw material;
(2) Adding copper ions, bleaching the pulp obtained in the step (1) by utilizing hydrogen peroxide under the condition of pH3 to obtain a primary bleaching product, and adjusting the solution to be alkaline and then squeezing for standby;
(3) Oxidizing the fibers by using a TEMPO oxidation method, separating the fibers, and then performing further mechanical treatment until the fibers are completely dispersed and the transparency is not enhanced;
(4) Adding calcium ion solution into the dispersed fibers under the condition of mechanical stirring, enhancing the strength of a network structure among fibers by chelating carboxyl and calcium ions, wherein the amount of added calcium ions is related to the fiber raw materials, and the concentration of the calcium ions is reduced before the viscosity of the fibers is controlled to be increased;
(5) Continuously mechanically stirring, and adding polyethyleneimine to ensure that the fiber mixed solution is positively charged;
(6) Dripping the mixed solution on the surface of paper, uniformly coating by using a coater, and airing at normal temperature and normal pressure;
(7) And (3) wetting the paper with water, and then drying to prevent the surface from being uneven, thereby obtaining the antibacterial and oil-resistant packaging paper.
The calcium ion solution is an aqueous solution of calcium chloride and contains free calcium ions, and the free calcium ions can be complexed with carboxyl groups in cellulose after TEMPO oxidation. The concentration of the calcium ions was 0.05M.
The amount of the polyethyleneimine is based on the fact that the fiber mixture is positively charged, and the specific amount is about: 0.5g/mL.
Copper ions are added as a catalyst during bleaching treatment, fenton is utilized to catalyze hydrogen peroxide to generate hydroxyl radicals, and the oxidation activity of the hydroxyl radicals is far greater than that of the hydrogen peroxide, so that the bleaching effect is better. The specific dosage of copper ions is as follows: the concentration in the final reaction solution was 0.5mg/L.
The prepared packaging paper is subjected to performance test, and the specific test method and test data are as follows:
(1) And (3) detecting the oleophobic property of the paper by using a KIT value method, preparing non-polar sequentially enhanced solutions of numbers 1 to 12, dripping the solution onto the surface of the paper for 20 seconds, wiping the liquid drops, and observing whether a reagent enters the paper or not, wherein the value of the KIT is increased from 1 to 9-10 of the base paper.
(2) Observing the morphology change of the paper surface by using a scanning electron microscope, and determining the reason of the paper barrier property change; SEM images of the base paper and the antibacterial and oil-resistant performance packaging paper according to the present invention are shown in fig. 2 and 3, respectively.
(3) And the antibacterial performance of the paper is judged by detecting the antibacterial ring. The antibacterial ring of the paper for inhibiting the growth of staphylococcus aureus is shown in fig. 4, wherein A is base paper, and B is the antibacterial oil-resistant performance packaging paper.
Example 2
A method for preparing a packaging paper with antibacterial and oil-resistant properties by using waste cotton textiles comprises the following process steps:
(1) The method comprises the steps of (1) disassembling waste cotton textiles, adding the waste cotton textiles into a 1% potassium hydroxide solution, soaking for one night at normal temperature, filtering for later use, then steaming the treated waste cotton fibers in the 1% potassium hydroxide solution at 120 ℃ for 1 hour, and finally squeezing pulp obtained by treating the waste cotton textiles, crushing and sieving to obtain a required primary raw material;
(2) Adding copper ions, bleaching the pulp obtained in the step (1) by utilizing hydrogen peroxide under the condition of pH 6 to obtain a primary bleaching product, and adjusting the solution to be alkaline and then squeezing for standby;
(3) Oxidizing the fibers by using a TEMPO oxidation method, separating the fibers, and then performing further mechanical treatment until the fibers are completely dispersed and the transparency is not enhanced;
(4) Adding calcium ion solution into the dispersed fibers under the condition of mechanical stirring, enhancing the strength of a network structure among fibers by chelating carboxyl and calcium ions, wherein the amount of added calcium ions is related to the fiber raw materials, and the concentration of the calcium ions is reduced before the viscosity of the fibers is controlled to be increased;
(5) Continuously mechanically stirring, and adding polyethyleneimine to ensure that the fiber mixed solution is positively charged;
(6) Dripping the mixed solution on the surface of paper, uniformly coating by using a coater, and airing at normal temperature and normal pressure;
(7) The paper is wetted by water and then dried, so that the phenomenon of uneven surface is prevented.
The calcium ion solution is an aqueous solution of calcium nitrate and contains free calcium ions, and the free calcium ions can be complexed with carboxyl groups in cellulose after TEMPO oxidation. The concentration of the calcium ions was 0.2M.
The dosage of the polyethyleneimine is as follows: 1g/mL.
Copper ions are added as a catalyst during bleaching treatment, fenton is utilized to catalyze hydrogen peroxide to generate hydroxyl radicals, and the oxidation activity of the hydroxyl radicals is far greater than that of the hydrogen peroxide, so that the bleaching effect is better. The specific dosage of copper ions is as follows: 2mg/L.
Example 3
A method for preparing a packaging paper with antibacterial and oil-resistant properties by using waste cotton textiles comprises the following process steps:
(1) Disassembling waste cotton textiles, adding the waste cotton textiles into 0.5% potassium hydroxide solution, soaking for one night at normal temperature, filtering to dry for later use, then steaming the treated waste cotton fibers in the 0.5% potassium hydroxide solution at 90 ℃ for 1 hour, and finally squeezing, crushing and sieving pulp obtained by treating the waste cotton textiles to obtain a required primary raw material;
(2) Adding copper ions, bleaching the pulp obtained in the step (1) by utilizing hydrogen peroxide under the condition of pH 5 to obtain a primary bleaching product, and adjusting the solution to be alkaline and then squeezing for later use;
(3) Oxidizing the fibers by using a TEMPO oxidation method, separating the fibers, and then performing further mechanical treatment until the fibers are completely dispersed and the transparency is not enhanced;
(4) Adding calcium ion solution into the dispersed fibers under the condition of mechanical stirring, enhancing the strength of a network structure among fibers by chelating carboxyl and calcium ions, wherein the amount of added calcium ions is related to the fiber raw materials, and the concentration of the calcium ions is reduced before the viscosity of the fibers is controlled to be increased;
(5) Continuously mechanically stirring, and adding polyethyleneimine to ensure that the fiber mixed solution is positively charged;
(6) Dripping the mixed solution on the surface of paper, uniformly coating by using a coater, and airing at normal temperature and normal pressure;
(7) The paper is wetted by water and then dried, so that the phenomenon of uneven surface is prevented.
The calcium ion solution is an aqueous solution of calcium chloride and contains free calcium ions, and the free calcium ions can be complexed with carboxyl groups in cellulose after TEMPO oxidation. The concentration of the calcium ions was 0.1M.
The dosage of the polyethyleneimine is as follows: 0.8g/mL.
Copper ions are added as a catalyst during bleaching treatment, fenton is utilized to catalyze hydrogen peroxide to generate hydroxyl radicals, and the oxidation activity of the hydroxyl radicals is far greater than that of the hydrogen peroxide, so that the bleaching effect is better. The specific dosage of copper ions is as follows: 1mg/L.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (9)
1. The method for preparing the packaging paper with the antibacterial and oil-resistant properties by using the waste cotton textiles is characterized by comprising the following process steps of:
(1) Disassembling waste cotton textiles, adding the waste cotton textiles into alkali liquor, soaking for a certain time, filtering, then steaming the treated waste cotton fibers in the alkali liquor to obtain pulp, and squeezing, crushing and sieving the obtained pulp to obtain a primary raw material;
(2) Adding copper ions, carrying out bleaching treatment on the primary raw material obtained in the step (1) by utilizing hydrogen peroxide to obtain a primary bleaching product, adjusting the solution to be alkaline, and then squeezing the primary bleaching product to obtain a bleaching product;
(3) Oxidizing the bleached product fiber obtained in the step (2), separating the fiber, and then performing further mechanical treatment until the fiber is completely dispersed to nanometer size;
(4) Adding the product obtained in the step (3) into a calcium ion solution under the condition of mechanical stirring;
continuously mechanically stirring, and adding polyethyleneimine to ensure that the fiber mixed solution is positively charged;
(6) Dripping the mixed solution obtained in the step (5) on the surface of paper, uniformly coating the paper by using a coater, and airing to obtain the paper;
(7) And (3) wetting the paper obtained in the step (6) by using water, and then drying to obtain the packaging paper with the antibacterial and oil-resistant properties.
2. The method for preparing the packaging paper with the antibacterial and oil-resistant properties by using the waste cotton textiles according to claim 1, wherein in the step (1), the alkali liquor is 0.04% -1% of sodium hydroxide or potassium hydroxide solution.
3. The method for preparing the packaging paper with the antibacterial and oil-resistant properties by using the waste cotton textiles according to claim 2, wherein in the step (1), the waste cotton textiles are soaked in alkali liquor at normal temperature for one night.
4. The method for preparing the packaging paper with the antibacterial and oil-resistant performance by using the waste cotton textiles according to claim 3, wherein in the step (1), the treated waste cotton fibers are steamed and boiled in alkali liquor at 40-120 ℃ for 1 hour.
5. The method for preparing the packaging paper with the antibacterial and oil-resistant properties by using the waste cotton textiles according to claim 1, wherein in the step (2), pulp is subjected to bleaching treatment by using hydrogen peroxide under the condition of pH 3-6.
6. The method for preparing the packaging paper with the antibacterial and oil-resistant properties by using the waste cotton textiles according to claim 1, wherein in the step (2), the specific dosage of the copper ions is as follows: 0.5-2mg/L.
7. The method for preparing the packaging paper with the antibacterial and oil-resistant properties by using the waste cotton textiles according to claim 1, wherein in the step (3), the fibers are oxidized by using a TEMPO oxidation method.
8. The method for preparing the packaging paper with the antibacterial and oil-resistant properties by using the waste cotton textiles according to claim 1, wherein in the step (4), the concentration of calcium ions is 0.05-0.2M.
9. The method for preparing the packaging paper with the antibacterial and oil-resistant performance by utilizing the waste cotton textiles, which is characterized in that in the step (5), the consumption of the polyethyleneimine is as follows: 0.5-1g/mL.
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| CN202210615503.4A CN114990934A (en) | 2022-06-01 | 2022-06-01 | Method for preparing antibacterial and oil-resistant packaging paper by using waste cotton textiles |
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| CN202310036345.1A Pending CN116556111A (en) | 2022-06-01 | 2023-01-10 | Method for preparing antibacterial oil-resistant performance packaging paper by using waste cotton textiles |
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