CN113201960B - Photocatalytic paper and preparation method thereof - Google Patents
Photocatalytic paper and preparation method thereof Download PDFInfo
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- CN113201960B CN113201960B CN202110485155.9A CN202110485155A CN113201960B CN 113201960 B CN113201960 B CN 113201960B CN 202110485155 A CN202110485155 A CN 202110485155A CN 113201960 B CN113201960 B CN 113201960B
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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
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
-
- 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
- D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays
-
- 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
- D21H21/36—Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
- Paper (AREA)
Abstract
The invention relates to and belongs to the field of inorganic non-metallic materials and environment-friendly materials in general, and provides photocatalytic paper which comprises dry paper pulp and a silicon dioxide loaded nano titanium dioxide photocatalyst, wherein the dry paper pulp accounts for 75-91% by mass, and the silicon dioxide loaded nano titanium dioxide photocatalyst is the balance and is uniformly distributed; the preparation method comprises the following steps: s1, grinding silica-loaded nano titanium dioxide photocatalyst particles, and adding a surface modifier and a dispersion anti-settling agent to obtain silica-loaded nano titanium dioxide photocatalytic material slurry; s2, pouring the pulp obtained in the step S1 into a pulp-water system, and stirring and dispersing to obtain pulp; s3, adding water to dilute the paper pulp slurry obtained in the step S2, then pouring the diluted paper pulp slurry into a paper pulp dispersing pool, and simultaneously adding a retention aid; and S4, papermaking is carried out on the mixture processed in the step S3, and the wet papermaking paper is dehydrated, compacted, dried and rolled to obtain the photocatalytic paper.
Description
Technical Field
The invention relates to the field of inorganic non-metallic materials and environment-friendly materials, in particular to photocatalytic paper and a preparation method thereof.
Background
The photocatalytic material is one of key environment-friendly materials for deeply purifying organic pollutants, ammonia nitrogen, bacteria and viruses in indoor air, has the advantages of environmental protection, no toxicity, harmlessness, good effect on human bodies and the like compared with an adsorption material and a sterilization material, but also has the trouble of inconvenient use and the need of making a spray for indoor and in-vehicle spray construction after decoration. Therefore, it is a key technical problem to solve these problems that the photocatalyst is supported on a certain carrier to be manufactured into articles for indoor and car use.
Paper is the most common article in our daily life, and is in contact with paper when reading books and newspapers, or writing and drawing. Paper is not available in industrial, agricultural and defense industry.
Paper is a sheet-like fibrous product used for writing, printing, drawing, packaging, or the like. The plant fiber pulp is produced by combining water suspension of plant fiber after pulping treatment on a net in a staggered manner, preliminarily dewatering, compressing and drying. China is the world in which paper was invented the earliest. According to archaeological findings, in the period of Western Han dynasty (206-8 years before the Gongyuan), china already has hemp fiber paper.
The paper to be produced by a general machine includes printing paper, wrapping paper, drawing paper, electrical insulating paper, blotting paper, sheet paper, decorative paper, note paper, filter paper, and special processing paper. The manufacturing method varies according to the use scene and the quality requirement.
Modern paper making processes can be divided into the main steps of pulping, modulation, papermaking, processing and the like. Pulping is the first step of papermaking and generally there are three methods for converting wood into pulp, mechanical pulping, chemical pulping and semi-chemical pulping. The modulation of paper stock is another key point of papermaking, and the strength, the color tone and the printing quality of the finished paper and the storage life of the paper are directly related to the modulation of paper stock. The main work of papermaking is to uniformly interweave and dehydrate thin paper stock, and then to dry, press polish, roll paper, cut, sort and package the paper stock. And finally, manually or mechanically selecting the paper with the damage or stain, and finally packaging every five hundred sheets into one package.
Paper is a type of microscopically porous material. If the photocatalyst can be loaded on paper, it is possible to realize the functions of loading the photocatalyst on a porous material, degrading pollutants in the air by a photocatalytic reaction on a large surface area and resisting bacteria and viruses.
Disclosure of Invention
The invention aims to provide a preparation method of photocatalytic paper, which firmly coats a supported nano photocatalyst on the surface of paper fiber, and the obtained product has air purification function with photocatalytic performance due to the porosity of paper and the adsorbability of the supported nano photocatalyst to organic pollutants and bacteria and viruses in air.
The technical scheme of the invention is as follows: the photocatalytic paper comprises dry paper pulp and a photocatalyst (the invention adopts 'Lujie' brand photocatalyst, a conventional commercial product), wherein the mass percent of the dry paper pulp is 75-91%, the mass percent of the photocatalyst is 9-25%, and particles of the photocatalyst are uniformly distributed in the interior and on the surface of paper formed by the dry paper pulp.
The invention also provides a preparation method of the photocatalytic paper, which comprises the following steps:
s1, grinding a photocatalyst, and simultaneously adding a surface modifier and a dispersion anti-settling agent to obtain photocatalyst slurry;
s2, pouring the photocatalyst slurry obtained in the step S1 into a paper pulp-water system, and stirring and dispersing to obtain paper pulp slurry;
s3, adding water to dilute the paper pulp slurry obtained in the step S2, then performing dispersion treatment, and adding a retention aid;
and S4, papermaking is carried out on the mixture processed in the step S3, and the papermaking wet paper is dehydrated, compacted, dried and rolled to obtain the photocatalytic paper.
Further, the photocatalyst in S1 is a commercially available titanium dioxide-supported silica photocatalyst as a raw material, and the main components thereof include titanium dioxide and silica; the fineness of the photocatalytic material after grinding is 200-1250 meshes.
Further, the grinding in the step S1 adopts a wet grinding method, and the mass ratio of the photocatalyst to water is 1: grinding at a ratio of 0.5-1.5 until the average particle size of the photocatalytic material is 3-8 microns and the maximum particle size is less than 45 microns.
Further, the dispersion anti-settling agent used in the step S1 is one of sodium polyacrylate, sodium hexametaphosphate and sodium polycarboxylate, and the amount of the dispersion anti-settling agent is 0.01-0.8% of the mass of the photocatalyst; the used surface modifier is a silane coupling agent or a phthalate coupling agent or fatty alcohol-polyoxyethylene ether, and the dosage of the surface modifier is 0.1-2.0% of the mass of the photocatalyst.
Further, the paper pulp in the step S1 is wood pulp, straw pulp, hemp pulp, reed pulp, cane pulp, bamboo pulp, rag pulp or a mixture of the wood pulp, the straw pulp, the hemp pulp, the reed pulp, the cane pulp and the rag pulp in any proportion.
Further, in step S2, the photocatalyst slurry: pulp: the mass ratio of water is 1:3-10:30-100, and the stirring and dispersing time is 1-4h.
Further, in the step S3, the pulp slurry: the mass ratio of water is 1:30-200 parts of; the retention aid is polyacrylamide, and the dosage of the retention aid is 0.01-1% of the mass of the paper pulp.
Further, in the step S4, the drying is carried out at 80-120 ℃ until the paper quality is 30g/m 2 -120g/m 2 。
The preparation method comprises the following steps: the first step is as follows: the photocatalyst with the fineness of 200-1250 meshes is used as a raw material, and is mixed with a surface modifier, a dispersion anti-settling agent and water according to the mass ratio of 1: (0.001-0.02): (0.0001-0.008): (0.5-1.5) mixing, and grinding by using a grinding system of a wet stirring mill; controlling the temperature of a grinding system to be not higher than 80 ℃ in the grinding process; grinding until the average particle size is 3-8 microns and the maximum particle size is less than 45 microns to obtain slurry; the second step is that: pouring the slurry prepared in the first step into a paper pulp-water medium system, wherein the mass ratio of the slurry to the paper pulp to the water is 1: (3-10): (30-100), and dispersing and stirring in a strong stirring dispersion machine for 1-4h; the third step: adding water to dilute the paper pulp slurry prepared in the second step, wherein the paper pulp, the retention aid and the water are mixed according to the mass ratio of 1: (0.0001-0.01): (30-200) mixing and dispersing; the fourth step: making paper with the paper pulp dispersed in the third step, dewatering, compacting and drying at 80-120 deg.c to control the paper drying quality at 30g/m 2 -120g/m 2 And the paper is wound on a winding machine, so that the paper with photocatalytic performance can be obtained.
In a preferred embodiment of the present invention, the fineness of the raw material in the first step is 325 to 1000 mesh.
In a preferred embodiment of the present invention, in the first step, the surface modifier is one of a silane coupling agent, a phthalate coupling agent and peregal, and is preferably a silane coupling agent.
In a preferred embodiment of the present invention, the dispersion anti-settling agent in the first step is one of sodium polyacrylate, sodium hexametaphosphate and sodium polycarboxylate, and is preferably sodium polyacrylate.
In a preferred embodiment of the present invention, in the first step, the photocatalyst is mixed with the surface modifier, the dispersion anti-settling agent and water in a mass ratio of 1: (0.005-0.015): (0.003-0.005): (0.8-1.2).
In a preferred embodiment of the invention, the temperature of the grinding system during the first grinding step is not higher than 70 ℃, the average particle size after grinding is 4 to 5 microns, and the maximum particle size is less than 40 microns.
In a preferred embodiment of the invention, the pulp in the second step is wood pulp, straw pulp, hemp pulp, reed pulp, cane pulp, bamboo pulp, rag pulp or a mixture thereof in any proportion.
In a preferred embodiment of the present invention, the mass ratio of the slurry to the pulp and the water in the second step is 1: (5-8): (50-80).
In a preferred embodiment of the present invention, the second step is dispersion-stirred in a strong stirring disperser for 2 to 3 hours.
In a preferred embodiment of the invention, the retention aid in the third step is polyacrylamide or a polyacrylamide emulsion.
In a preferred embodiment of the invention, the pulp in the third step is mixed with a retention aid and water in a mass ratio of 1: (0.002-0.005): (80 to 120)
In a preferred embodiment of the invention, the drying temperature in the fourth step is from 80 to 105 ℃ and the dry mass of the paper is from 50 to 80g/m 2 。
Compared with the prior art, the invention has the advantages that:
the photocatalytic material used in the method takes a commercially available titanium dioxide-loaded silicon dioxide photocatalyst as a raw material, and the main components of the photocatalytic material are titanium dioxide and silicon dioxide, so that pollutants can be degraded under natural light, and the photocatalytic material has extremely high stability.
The method of the invention creatively utilizes the porous property, white property and fiber carrying property of the paper, the photocatalysis material is firmly loaded in the paper, and the paper is porous in microcosmic, which can increase the active sites of the photocatalyst contacting with the pollutants, so that the paper has the functions of degrading the pollutants such as formaldehyde, toluene and the like in the air and resisting bacteria and virus, meanwhile, the used raw materials have no odor, can ensure the normal use of users, and the paper is convenient to use indoors and in vehicles, is easy to store, and can be placed in any place needing to degrade the air pollutants according to the requirements. The photocatalytic paper prepared by the method can be used as one of key materials for indoor air purification, and provides a new way for expanding the use of paper and solving the problem of indoor air purification.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments in order to make the present invention better understood by those skilled in the art.
Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art, and the raw materials used are commercially available.
Example 1
1. The preparation method comprises the following steps of taking a commercially available Lujie photocatalyst with the fineness of 200-325 meshes as a raw material, and mixing the Lujie photocatalyst with a phthalate coupling agent, sodium hexametaphosphate and water according to a mass ratio of 1:0.001:0.0001:0.5, mixing, and grinding by using a grinding system of a wet stirring mill; controlling the temperature of a grinding system to be not higher than 70 ℃ in the grinding process; grinding to an average particle size of 6-8 microns and a maximum particle size of less than 45 microns;
2. pouring the slurry prepared in the step 1) into a paper pulp-water medium system, wherein the mass ratio of the slurry to wood pulp to water is 1:3:30, mixing, and dispersing and stirring in a strong stirring dispersion machine for 1 hour;
3. diluting the paper pulp slurry prepared in the step 2) by adding water, wherein the paper pulp, the polyacrylamide emulsion and the water are mixed according to the mass ratio of 1:0.0001:30, mixing and dispersing;
4. dewatering and compacting the dispersed paper pulp, and drying the wet paper at 10-20 ℃, wherein the drying quality of the paper is controlled at 30g/m 2 -50g/m 2 And the paper is wound on a winding machine, so that the paper with photocatalytic performance can be obtained.
The formaldehyde and toluene purification test is carried out according to the building material industry standard JC/T1074-2008, the formaldehyde purification efficiency is 78.1%, the formaldehyde purification effect durability is 75.4%, the toluene purification efficiency is 35.1%, and the toluene purification effect durability is 28.7%, and the result meets the technical index requirements of I-type materials in the standard JC/T1074-2008.
Example 2
1. The method comprises the following steps of taking a commercially available Lujie photocatalyst with the fineness of 1000-1250 meshes as a raw material, and mixing the Lujie photocatalyst with peregal, sodium polycarboxylate and water in a mass ratio of 1:0.02:0.008:1.5, mixing, and grinding by using a grinding system of a wet stirring mill; controlling the temperature of a grinding system to be not higher than 80 ℃ in the grinding process; grinding to an average particle size of 3-4 microns and a maximum particle size of less than 35 microns;
2. pouring the slurry prepared in the step 1) into a paper pulp-water medium system, wherein the mass ratio of the slurry to the straw pulp to the water is 1:10:100, mixing, and dispersing and stirring in a strong stirring dispersion machine for 4 hours;
3. diluting the paper pulp slurry prepared in the step 2) by adding water, wherein the paper pulp, the polyacrylamide and the water are mixed according to the mass ratio of 1:0.01:200, mixing, and performing dispersion treatment;
4. dewatering and compacting the dispersed paper pulp, and drying at 105-120 deg.C, wherein the drying quality of paper is controlled at 100g/m 2 -120g/m 2 And the paper is wound on a winding machine, so that the paper with photocatalytic performance can be obtained.
The formaldehyde and toluene purification test is carried out according to the building material industry standard JC/T1074-2008, the formaldehyde purification efficiency is 80.1%, the formaldehyde purification effect durability is 76.5%, the toluene purification efficiency is 35.4%, and the toluene purification effect durability is 29.6%, and the result meets the technical index requirements of I-type materials in the standard JC/T1074-2008.
Example 3
1. The method comprises the following steps of taking a commercial Lujie photocatalyst with the fineness of 325-500 meshes as a raw material, and mixing the Lujie photocatalyst with a silane coupling agent, sodium polyacrylate and water according to a mass ratio of 1:0.008:0.004:1, mixing, and grinding by using a grinding system of a wet stirring mill; controlling the temperature of a grinding system to be not higher than 70 ℃ in the grinding process; grinding until the average particle size is 4-5 microns and the maximum particle size is less than 40 microns;
2. pouring the slurry prepared in the step 1) into a paper pulp-water medium system, wherein the mass ratio of the slurry to wood pulp to water is 1:5:50, mixing, and dispersing and stirring in a strong stirring dispersion machine for 3 hours;
3. diluting the paper pulp slurry prepared in the step 2) by adding water, wherein the paper pulp, the polyacrylamide and the water are mixed according to the mass ratio of 1:0.003:100, mixing, and performing dispersion treatment;
4. dewatering and compacting the dispersed paper pulp, and drying at 105 deg.C to obtain paper with dry quality of 80g/m 2 And the paper is wound on a winding machine, so that the paper with photocatalytic performance can be obtained.
Formaldehyde and toluene purification tests are carried out according to the building material industry standard JC/T1074-2008, the formaldehyde purification efficiency is 80.2 percent, the formaldehyde purification effect durability is 78.6 percent, the toluene purification efficiency is 35.6 percent, the toluene purification effect durability is 31.9 percent, and the result meets the technical index requirements of I-type materials in the standard JC/T1074-2008
While embodiments of the present invention have been described above, the above description is illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (3)
1. The preparation method of the photocatalytic paper is characterized by comprising the following steps of:
s1, grinding a photocatalyst, and simultaneously adding a surface modifier and a dispersion anti-settling agent to obtain photocatalyst slurry;
s2, pouring the photocatalyst slurry obtained in the step S1 into a paper pulp-water system, and stirring and dispersing to obtain paper pulp slurry;
s3, adding water to dilute the paper pulp slurry obtained in the step S2, then performing dispersion treatment, and adding a retention aid;
s4, papermaking is carried out on the mixture processed in the step S3, and the papermaking wet paper is dehydrated, compacted, dried and rolled to obtain the photocatalytic paper;
the photocatalyst in the step S1 is a titanium dioxide-loaded silicon dioxide photocatalyst, and the components of the titanium dioxide-loaded silicon dioxide photocatalyst comprise titanium dioxide and silicon dioxide; the fineness of the photocatalyst obtained by grinding is 200 to 1250 meshes;
the grinding in the step S1 adopts a wet grinding method, and the mass ratio of the photocatalyst to water is 1: grinding at a ratio of 0.5-1.5 until the average particle size of the photocatalyst is 3-8 microns and the maximum particle size is less than 45 microns;
the dispersion anti-settling agent used in the step S1 is one of sodium polyacrylate, sodium hexametaphosphate and sodium polycarboxylate, and the using amount of the dispersion anti-settling agent is 0.01-0.8% of the mass of the photocatalyst; the used surface modifier is a silane coupling agent or a phthalate coupling agent or fatty alcohol-polyoxyethylene ether, and the using amount of the surface modifier is 0.1-2.0% of the mass of the photocatalyst;
in the step S2, the photocatalyst slurry: pulp: the mass ratio of water is 1:3-10:30-100, and the stirring and dispersing time is 1-4h;
in the step S3, pulp slurry: the mass ratio of water is 1:30-200 parts of; the retention aid is polyacrylamide, and the dosage of the retention aid is 0.01-1% of the mass of the paper pulp;
the obtained photocatalytic paper comprises 75-91% of dry paper pulp by mass and 9-25% of photocatalyst by mass, and particles of the photocatalyst are uniformly distributed in the interior and on the surface of paper formed by the dry paper pulp.
2. The process for preparing photocatalytic paper as set forth in claim 1, wherein the pulp is wood pulp, straw pulp, hemp pulp, reed pulp, cane pulp, bamboo pulp, cloth pulp or a mixture thereof in any proportion.
3. The photocatalytic paper production method according to claim 1, wherein in step S4, the drying is performed at 80 to 120 ℃, and the drying is performed until the paper quality is 30g/m 2 -120g/m 2 。
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| NO20005869L (en) * | 2000-06-16 | 2001-12-17 | Ein Kohsah Co Ltd | Laminated photocatalytic pulp paper and process for making the same |
| CN1228395C (en) * | 2002-05-20 | 2005-11-23 | 中国科学院理化技术研究所 | Micro-mesoporous silica heterocomplex and preparation method and application thereof |
| CN101298745A (en) * | 2007-04-30 | 2008-11-05 | 上海美林包装印刷有限公司 | Method for preparing negative oxygen ion environment-protective antibiotic paper pulp |
| CN106590033B (en) * | 2016-12-13 | 2018-08-21 | 北京林业大学 | A kind of modifying titanium dioxide filler and its preparation method and application |
| CN107376889B (en) * | 2017-08-22 | 2019-10-01 | 北京依依星科技有限公司 | A kind of diatomite/(C+TiO2) nano composite photo-catalyst preparation method |
| CN108951300A (en) * | 2018-07-26 | 2018-12-07 | 武汉菡美洛建筑材料有限公司 | A kind of Environment-friendlywallpaper wallpaper with photocatalysis performance |
| CN111359621A (en) * | 2020-03-09 | 2020-07-03 | 南昌航空大学 | Photocatalytic degradation composite particle and preparation method and application thereof |
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Effective date of registration: 20231127 Address after: 047500 Heshi Township Heshi Village, Lucheng City, Changzhi City, Shanxi Province Patentee after: SHANXI YIYIXING TECHNOLOGY Co.,Ltd. Address before: 102205 No. 16, West Street, Yangfang Village, Yangfang Town, Changping District, Beijing Patentee before: BEIJING YIXING TECHNOLOGY Co.,Ltd. |