CN109235142B - Flame-retardant wallpaper filled with bismuth oxyhydroxide intercalated hydrotalcite and preparation method thereof - Google Patents
Flame-retardant wallpaper filled with bismuth oxyhydroxide intercalated hydrotalcite and preparation method thereof Download PDFInfo
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- CN109235142B CN109235142B CN201811355853.1A CN201811355853A CN109235142B CN 109235142 B CN109235142 B CN 109235142B CN 201811355853 A CN201811355853 A CN 201811355853A CN 109235142 B CN109235142 B CN 109235142B
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/18—Paper- or board-based structures for surface covering
- D21H27/20—Flexible structures being applied by the user, e.g. wallpaper
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
Abstract
The invention relates to the technical field of flame-retardant wallpaper, and provides flame-retardant wallpaper filled with bismuth oxyhydroxide intercalated hydrotalcite and a preparation method thereof. According to the method, bismuth oxyhydroxide is synthesized in situ through a hydrothermal reaction and intercalated between sheets of magnesium-aluminum hydrotalcite nano-sheets, then added into papermaking slurry to prepare flame-retardant paper pulp slurry, and then the flame-retardant wallpaper filled with the bismuth oxyhydroxide intercalated hydrotalcite is prepared through copying, printing and dyeing, embossing and covering a colloid layer. Compared with the traditional method, the flame-retardant wallpaper prepared by the invention takes the bismuth oxyhydroxide intercalated hydrotalcite as the flame-retardant filler, and the oxygen index of the wallpaper can be obviously improved through diluting oxygen by water generated by thermal decomposition of the hydrotalcite and the bismuth oxyhydroxide and forming the carbonized barrier layer with the multilayer structure by the oxide, so that the flame-retardant grade of the wallpaper reaches the flame-retardant grade.
Description
Technical Field
The invention belongs to the technical field of flame-retardant wallpaper, and provides flame-retardant wallpaper filled with bismuth oxyhydroxide intercalated hydrotalcite and a preparation method thereof.
Background
Wallpaper has the advantages of various colors, abundant patterns, luxury, safety, environmental protection, convenient construction, proper price and the like which are incomparable with various other interior decoration materials, thereby becoming more and more popular decoration materials. However, the materials of wallpaper are generally flammable or inflammable materials, and there is a risk of fire, so that much attention is paid to the research and application of wallpaper with flame retardant properties.
At present, the preparation of the flame-retardant wallpaper mostly adopts the following two methods: (1) dipping paper products, which is substantially similar to the dipping treatment method of wood, and soaking the formed paper and the paper products in a flame retardant solution with a certain concentration, taking out the paper and the paper products after a certain time, and drying the paper and the paper products to obtain flame-retardant products; (2) the coating treatment of paper product includes dispersing insoluble or insoluble fire retardant in certain solvent, coating the fire retardant system onto the surface of paper and paper product with adhesive and through coating or spraying, and heating to dry to obtain the fire retardant product.
The Chinese invention patent application number 201710932219.9 discloses a flame-retardant wallpaper, which comprises a base paper layer, and a functional layer and a coating layer which are sequentially arranged on the base paper layer, wherein the functional layer is composed of the following raw materials in parts by weight: 45-62 parts of adhesive, 8-13 parts of surface modified nano zirconia, 12-15 parts of flame retardant and 2-5 parts of ethylenediamine; the coating layer is composed of the following raw materials in parts by weight: 46-65 parts of polyvinyl chloride resin, 4-8 parts of pigment, 5-9 parts of dispersing agent, 4-7 parts of calcium carbonate and 3-5 parts of barium sulfate. However, the flame retardant property of the wallpaper prepared by the method is not ideal and needs to be further improved.
The Chinese patent application No. 201711142845.4 discloses a flame-retardant wallpaper and a preparation method thereof, wherein the preparation method comprises the following steps: (1) mixing chlorinated paraffin, calcium carbonate, antimony trioxide, stearic acid and zinc borate to obtain a mixture M1; (2) mixing nano titanium dioxide with water to prepare colloid; (3) mixing the colloid prepared in the step (2) with graphene oxide to prepare a mixture M2; (4) mixing the mixture M1 and the mixture M2, drying and grinding to obtain the flame retardant; (5) and (4) mixing and smelting PVC powder, a plasticizer, a filler and the flame retardant prepared in the step (4), extruding, and tabletting by a calender to obtain the flame-retardant wallpaper. However, the wallpaper of the invention has low oxygen index and poor flame retardant property.
In conclusion, the wallpaper prepared by the prior art has the defects of low oxygen index and poor flame retardant property, so that the development of the wallpaper with good flame retardant property has important significance.
Disclosure of Invention
Therefore, the wallpaper in the prior art has the defects of low oxygen index and poor flame retardant property. Aiming at the situation, the invention provides the flame-retardant wallpaper filled with the bismuth oxyhydroxide intercalated hydrotalcite and the preparation method thereof, wherein the bismuth oxyhydroxide intercalated hydrotalcite is used as a flame-retardant filler, the oxygen index of the wallpaper can be obviously improved through a multilayer-structure carbonized barrier layer formed by diluting oxygen with water generated by thermal decomposition of the hydrotalcite and the bismuth oxyhydroxide and oxides, and the flame-retardant grade of the wallpaper can reach flame retardancy.
In order to achieve the purpose, the invention relates to the following specific technical scheme:
a preparation method of flame-retardant wallpaper filled with bismuth oxyhydroxide intercalated hydrotalcite comprises the following specific steps:
(1) adding bismuth nitrate pentahydrate into a nitric acid aqueous solution, stirring until the bismuth nitrate pentahydrate is completely dissolved, then adding magnesium-aluminum hydrotalcite nanosheets, soaking for 10-15 hours under the assistance of ultrasound, filtering, and drying to obtain bismuth nitrate intercalation modified hydrotalcite;
(2) adding the bismuth nitrate intercalation modified hydrotalcite prepared in the step (1) into an ammonia water solution with the mass concentration of 20-30%, magnetically stirring uniformly, then placing the mixture into a hydrothermal reaction kettle for reaction, and cooling, washing and drying after the reaction is finished to prepare a bismuth oxyhydroxide intercalation hydrotalcite nanosheet;
(3) performing free pulping treatment on the paper pulp raw pulp, then adding the bismuth oxyhydroxide intercalated hydrotalcite nanosheet prepared in the step (2), pigment and sizing material, and uniformly stirring to prepare flame-retardant paper pulp slurry;
(4) and (4) making the flame-retardant paper pulp slurry prepared in the step (3) into paper by a paper machine, then printing, dyeing and embossing, covering a semitransparent colloid layer on the surface, and cutting and forming to prepare the flame-retardant wallpaper filled with the bismuth oxyhydroxide intercalated hydrotalcite.
Preferably, the raw materials in the step (1) comprise, by weight, 5-10 parts of bismuth nitrate pentahydrate, 8-15 parts of nitric acid, 15-20 parts of magnesium-aluminum hydrotalcite nanosheet and 55-72 parts of water.
Preferably, the ultrasonic frequency assisted by the ultrasonic wave in the step (1) is 50-80 kHz, and the power density is 0.5-0.8W/cm2。
Preferably, the raw materials in the step (2) comprise, by weight, 20-35 parts of bismuth nitrate intercalation modified hydrotalcite and 65-80 parts of ammonia water solution.
Preferably, the temperature of the hydrothermal reaction in the step (2) is 120-140 ℃, and the time is 4-6 h.
Preferably, in the flame-retardant paper pulp slurry in the step (3), 67-81 parts by weight of paper pulp raw slurry, 15-20 parts by weight of bismuth oxyhydroxide intercalated hydrotalcite nanosheets, 3-10 parts by weight of pigment and 1-3 parts by weight of sizing material.
Preferably, the pigment in the step (3) is one or more of iron oxide red, iron yellow, chromium oxide green, lead chromium green, iron blue, cobalt blue and ultramarine.
Preferably, the sizing material in the step (3) is one or more of rosin, alum and starch.
Preferably, the material of the colloidal layer in the step (4) is one of a polyethylene film, a polypropylene film and a polyethylene terephthalate film.
The invention also provides the flame-retardant wallpaper filled with the bismuth oxyhydroxide intercalated hydrotalcite. The flame-retardant wallpaper is prepared by in-situ synthesis of bismuth oxyhydroxide through hydrothermal reaction, intercalation of the bismuth oxyhydroxide between sheets of the magnesium-aluminum hydrotalcite nano-sheets, addition of the bismuth oxyhydroxide into papermaking slurry to prepare flame-retardant paper pulp slurry, and then copying, printing and dyeing, embossing and covering of a colloid layer.
The invention provides a flame-retardant wallpaper filled with bismuth oxyhydroxide intercalated hydrotalcite and a preparation method thereof, compared with the prior art, the invention has the outstanding characteristics and excellent effects that:
1. the flame-retardant wallpaper prepared by the invention takes the bismuth oxyhydroxide intercalated hydrotalcite as a flame-retardant filler, when the wallpaper is burnt, the bismuth oxyhydroxide is decomposed into bismuth oxide and water under the action of high temperature, and the magnesium hydroxide and the aluminum hydroxide in the magnesium-aluminum hydrotalcite are decomposed into magnesium oxide, aluminum oxide and water, and simultaneously crystal water is released. This process has three benefits: firstly, the decomposition reaction absorbs a large amount of heat, reduces the ambient temperature and can slow down the burning of the wallpaper; secondly, the generated water is changed into water vapor, so that oxygen in the air can be diluted, the surface temperature of the wallpaper is reduced, and the smoke suppression effect is achieved; thirdly, as the bismuth oxyhydroxide is inserted into the interlayer of the hydrotalcite nano-sheet, the bismuth oxide, the magnesium oxide and the aluminum oxide which are generated after the combustion can form a multilayer-structure carbonized barrier layer which is overlapped layer by layer, and the carbonized barrier layer covers the surface of the wallpaper to play a role in compact isolation and prevent the combustion from continuing. The flame-retardant wallpaper prepared by the invention has flame-retardant grade reaching flame retardancy.
2. The flame-retardant wallpaper prepared by the invention takes the bismuth oxyhydroxide intercalated hydrotalcite as the flame-retardant filler, does not generate harmful substances during combustion, and is good in environmental protection.
3. The preparation method has the advantages of easily available raw materials, simple process, lower comprehensive cost and higher product performance-price ratio.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, but it should not be construed that the scope of the present invention is limited to the following examples. Various substitutions and alterations can be made by those skilled in the art and by conventional means without departing from the spirit of the method of the invention described above.
Example 1
(1) Adding bismuth nitrate pentahydrate into a nitric acid aqueous solution, stirring until the bismuth nitrate pentahydrate is completely dissolved, then adding magnesium-aluminum hydrotalcite nanosheets, soaking for 13 hours under the assistance of ultrasound, filtering and drying to obtain bismuth nitrate intercalation modified hydrotalcite; the ultrasonic frequency of the ultrasonic auxiliary is 70kHz, and the power density is 0.7W/cm2(ii) a The weight parts of the raw materials are 7 parts of bismuth nitrate pentahydrate, 11 parts of nitric acid, 17 parts of magnesium-aluminum hydrotalcite nano-sheets and 65 parts of water;
(2) adding the bismuth nitrate intercalation modified hydrotalcite prepared in the step (1) into an ammonia water solution with the mass concentration of 26%, magnetically stirring uniformly, then placing the mixture into a hydrothermal reaction kettle for reaction, and cooling, washing and drying the mixture after the reaction is finished to prepare bismuth oxyhydroxide intercalation hydrotalcite nanosheets; the temperature of the hydrothermal reaction is 128 ℃, and the time is 5 h; 27 parts of bismuth nitrate intercalation modified hydrotalcite and 73 parts of ammonia water solution;
(3) performing free pulping treatment on the paper pulp raw pulp, then adding the bismuth oxyhydroxide intercalated hydrotalcite nanosheet prepared in the step (2), pigment and sizing material, and uniformly stirring to prepare flame-retardant paper pulp slurry; the pigment is iron oxide red; the sizing material is rosin; in the flame-retardant paper pulp slurry, 74 parts by weight of paper pulp raw pulp, 17 parts by weight of bismuth hydroxide intercalated hydrotalcite nano-sheets, 7 parts by weight of pigment and 2 parts by weight of sizing material;
(4) making the flame-retardant paper pulp slurry prepared in the step (3) into paper by a paper machine, then carrying out printing and dyeing and embossing, covering a semitransparent colloid layer on the surface, and then cutting and forming to prepare the flame-retardant wallpaper filled with the bismuth oxyhydroxide intercalated hydrotalcite; the colloid layer is made of polyethylene film.
Example 2
(1) Adding bismuth nitrate pentahydrate into a nitric acid aqueous solution, stirring until the bismuth nitrate pentahydrate is completely dissolved, then adding magnesium-aluminum hydrotalcite nanosheets, soaking for 11 hours under the assistance of ultrasound, filtering and drying to obtain bismuth nitrate intercalation modified hydrotalcite; ultrasound-assistedThe ultrasonic frequency is 60kHz, and the power density is 0.6W/cm2(ii) a The weight parts of the raw materials are 6 parts of pentahydrate bismuth nitrate, 10 parts of nitric acid, 16 parts of magnesium-aluminum hydrotalcite nano-sheets and 68 parts of water;
(2) adding the bismuth nitrate intercalation modified hydrotalcite prepared in the step (1) into an ammonia water solution with the mass concentration of 22%, magnetically stirring uniformly, then placing the mixture into a hydrothermal reaction kettle for reaction, and cooling, washing and drying the mixture after the reaction is finished to prepare bismuth oxyhydroxide intercalation hydrotalcite nanosheets; the temperature of the hydrothermal reaction is 125 ℃, and the time is 5.5 h; the weight parts of the raw materials are 24 parts of bismuth nitrate intercalation modified hydrotalcite and 76 parts of ammonia water solution;
(3) performing free pulping treatment on the paper pulp raw pulp, then adding the bismuth oxyhydroxide intercalated hydrotalcite nanosheet prepared in the step (2), pigment and sizing material, and uniformly stirring to prepare flame-retardant paper pulp slurry; the pigment is iron yellow; the sizing material is alum; in the flame-retardant paper pulp slurry, 78 parts by weight of paper pulp raw stock, 16 parts by weight of bismuth hydroxide intercalated hydrotalcite nano-sheets, 5 parts by weight of pigment and 1 part by weight of sizing material;
(4) making the flame-retardant paper pulp slurry prepared in the step (3) into paper by a paper machine, then carrying out printing and dyeing and embossing, covering a semitransparent colloid layer on the surface, and then cutting and forming to prepare the flame-retardant wallpaper filled with the bismuth oxyhydroxide intercalated hydrotalcite; the colloid layer is made of polypropylene film.
Example 3
(1) Adding bismuth nitrate pentahydrate into a nitric acid aqueous solution, stirring until the bismuth nitrate pentahydrate is completely dissolved, then adding magnesium-aluminum hydrotalcite nanosheets, soaking for 14 hours under the assistance of ultrasound, filtering and drying to obtain bismuth nitrate intercalation modified hydrotalcite; the ultrasonic frequency of the ultrasonic auxiliary is 70kHz, and the power density is 0.7W/cm2(ii) a The weight parts of the raw materials are 9 parts of pentahydrate bismuth nitrate, 12 parts of nitric acid, 19 parts of magnesium-aluminum hydrotalcite nano-sheets and 60 parts of water;
(2) adding the bismuth nitrate intercalation modified hydrotalcite prepared in the step (1) into an ammonia water solution with the mass concentration of 28%, magnetically stirring uniformly, then placing the mixture into a hydrothermal reaction kettle for reaction, and cooling, washing and drying the mixture after the reaction is finished to prepare bismuth oxyhydroxide intercalation hydrotalcite nanosheets; the temperature of the hydrothermal reaction is 135 ℃, and the time is 4.5 h; the weight parts of the raw materials are 32 parts of bismuth nitrate intercalation modified hydrotalcite and 68 parts of ammonia water solution;
(3) performing free pulping treatment on the paper pulp raw pulp, then adding the bismuth oxyhydroxide intercalated hydrotalcite nanosheet prepared in the step (2), pigment and sizing material, and uniformly stirring to prepare flame-retardant paper pulp slurry; the pigment is chromium oxide green; the sizing material is starch; in the flame-retardant paper pulp slurry, 70 parts by weight of paper pulp raw stock, 19 parts by weight of bismuth hydroxide intercalated hydrotalcite nano-sheets, 8 parts by weight of pigment and 3 parts by weight of sizing material;
(4) making the flame-retardant paper pulp slurry prepared in the step (3) into paper by a paper machine, then carrying out printing and dyeing and embossing, covering a semitransparent colloid layer on the surface, and then cutting and forming to prepare the flame-retardant wallpaper filled with the bismuth oxyhydroxide intercalated hydrotalcite; the colloid layer is made of polyethylene terephthalate film.
Example 4
(1) Adding bismuth nitrate pentahydrate into a nitric acid aqueous solution, stirring until the bismuth nitrate pentahydrate is completely dissolved, then adding magnesium-aluminum hydrotalcite nanosheets, soaking for 10 hours under the assistance of ultrasound, filtering and drying to obtain bismuth nitrate intercalation modified hydrotalcite; the ultrasonic frequency of the ultrasonic auxiliary is 50kHz, and the power density is 0.5W/cm2(ii) a The weight parts of the raw materials are 5 parts of pentahydrate bismuth nitrate, 8 parts of nitric acid, 15 parts of magnesium-aluminum hydrotalcite nano-sheets and 72 parts of water;
(2) adding the bismuth nitrate intercalation modified hydrotalcite prepared in the step (1) into an ammonia water solution with the mass concentration of 20%, magnetically stirring uniformly, then placing the mixture into a hydrothermal reaction kettle for reaction, and cooling, washing and drying the mixture after the reaction is finished to prepare bismuth oxyhydroxide intercalation hydrotalcite nanosheets; the temperature of the hydrothermal reaction is 120 ℃, and the time is 6 h; the weight parts of the raw materials are 20 parts of bismuth nitrate intercalation modified hydrotalcite and 80 parts of ammonia water solution;
(3) performing free pulping treatment on the paper pulp raw pulp, then adding the bismuth oxyhydroxide intercalated hydrotalcite nanosheet prepared in the step (2), pigment and sizing material, and uniformly stirring to prepare flame-retardant paper pulp slurry; the pigment is lead-chromium green; the sizing material is rosin; in the flame-retardant paper pulp slurry, 81 parts by weight of paper pulp raw stock, 15 parts by weight of bismuth hydroxide intercalated hydrotalcite nano-sheets, 3 parts by weight of pigment and 1 part by weight of sizing material;
(4) making the flame-retardant paper pulp slurry prepared in the step (3) into paper by a paper machine, then carrying out printing and dyeing and embossing, covering a semitransparent colloid layer on the surface, and then cutting and forming to prepare the flame-retardant wallpaper filled with the bismuth oxyhydroxide intercalated hydrotalcite; the colloid layer is made of polyethylene film.
Example 5
(1) Adding bismuth nitrate pentahydrate into a nitric acid aqueous solution, stirring until the bismuth nitrate pentahydrate is completely dissolved, then adding magnesium-aluminum hydrotalcite nanosheets, soaking for 15 hours under the assistance of ultrasound, filtering and drying to obtain bismuth nitrate intercalation modified hydrotalcite; the ultrasonic frequency of the ultrasonic auxiliary is 80kHz, and the power density is 0.8W/cm2(ii) a The weight parts of the raw materials are 10 parts of pentahydrate bismuth nitrate, 15 parts of nitric acid, 20 parts of magnesium-aluminum hydrotalcite nano-sheets and 55 parts of water;
(2) adding the bismuth nitrate intercalation modified hydrotalcite prepared in the step (1) into an ammonia water solution with the mass concentration of 30%, magnetically stirring uniformly, then placing the mixture into a hydrothermal reaction kettle for reaction, and cooling, washing and drying the mixture after the reaction is finished to prepare bismuth oxyhydroxide intercalation hydrotalcite nanosheets; the temperature of the hydrothermal reaction is 140 ℃ and the time is 4 h; the weight parts of the raw materials are 35 parts of bismuth nitrate intercalation modified hydrotalcite and 65 parts of ammonia water solution;
(3) performing free pulping treatment on the paper pulp raw pulp, then adding the bismuth oxyhydroxide intercalated hydrotalcite nanosheet prepared in the step (2), pigment and sizing material, and uniformly stirring to prepare flame-retardant paper pulp slurry; the pigment is iron blue; the sizing material is alum; in the flame-retardant paper pulp slurry, 67 parts by weight of paper pulp raw stock, 20 parts by weight of bismuth hydroxide intercalated hydrotalcite nano-sheets, 10 parts by weight of pigment and 3 parts by weight of sizing material are added;
(4) making the flame-retardant paper pulp slurry prepared in the step (3) into paper by a paper machine, then carrying out printing and dyeing and embossing, covering a semitransparent colloid layer on the surface, and then cutting and forming to prepare the flame-retardant wallpaper filled with the bismuth oxyhydroxide intercalated hydrotalcite; the colloid layer is made of polypropylene film.
Example 6
(1) Adding bismuth nitrate pentahydrate into a nitric acid aqueous solution, stirring until the bismuth nitrate pentahydrate is completely dissolved, then adding magnesium-aluminum hydrotalcite nanosheets, soaking for 12 hours under the assistance of ultrasound, filtering and drying to obtain bismuth nitrate intercalation modified hydrotalcite; the ultrasonic frequency of the ultrasonic auxiliary is 60kHz, and the power density is 0.6W/cm2(ii) a The weight parts of the raw materials are 8 parts of pentahydrate bismuth nitrate, 12 parts of nitric acid, 18 parts of magnesium-aluminum hydrotalcite nano-sheets and 62 parts of water;
(2) adding the bismuth nitrate intercalation modified hydrotalcite prepared in the step (1) into an ammonia water solution with the mass concentration of 25%, magnetically stirring uniformly, then placing the mixture into a hydrothermal reaction kettle for reaction, and cooling, washing and drying the mixture after the reaction is finished to prepare bismuth oxyhydroxide intercalation hydrotalcite nanosheets; the temperature of the hydrothermal reaction is 130 ℃, and the time is 5 h; the weight parts of the raw materials are 28 parts of bismuth nitrate intercalation modified hydrotalcite and 72 parts of ammonia water solution;
(3) performing free pulping treatment on the paper pulp raw pulp, then adding the bismuth oxyhydroxide intercalated hydrotalcite nanosheet prepared in the step (2), pigment and sizing material, and uniformly stirring to prepare flame-retardant paper pulp slurry; the pigment is ultramarine; the sizing material is starch; in the flame-retardant paper pulp slurry, 74 parts by weight of paper pulp raw pulp, 18 parts by weight of bismuth hydroxide intercalated hydrotalcite nano-sheets, 6 parts by weight of pigment and 2 parts by weight of sizing material;
(4) making the flame-retardant paper pulp slurry prepared in the step (3) into paper by a paper machine, then carrying out printing and dyeing and embossing, covering a semitransparent colloid layer on the surface, and then cutting and forming to prepare the flame-retardant wallpaper filled with the bismuth oxyhydroxide intercalated hydrotalcite; the colloid layer is made of polyethylene terephthalate film.
Comparative example 1
During the preparation process, only the magnesium aluminum hydrotalcite nanosheet is added into the paper pulp slurry, the bismuth oxyhydroxide is not intercalated, and other preparation conditions are consistent with those of example 6.
And (3) performance testing:
(1) UL94 flame retardant rating: the flame-retardant wallpaper prepared by the method is prepared into a sample with the thickness of 125mm multiplied by 13mm multiplied by 0.5mm, and a fire test is carried out by adopting the UL94 standard to measure the flame-retardant grade of the flame-retardant wallpaper;
(2) oxygen index: preparing the flame-retardant wallpaper prepared by the invention into a sample of 100-150 mm multiplied by 6.5mm multiplied by 3mm, and measuring the oxygen index of the flame-retardant wallpaper by adopting an HC-2 type oxygen index tester according to the GB/T2406-2009 standard;
the data obtained are shown in Table 1.
Table 1:
Claims (7)
1. the preparation method of the flame-retardant wallpaper filled with the bismuth oxyhydroxide intercalated hydrotalcite is characterized by comprising the following specific steps of:
(1) adding bismuth nitrate pentahydrate into a nitric acid aqueous solution, stirring until the bismuth nitrate pentahydrate is completely dissolved, then adding magnesium-aluminum hydrotalcite nanosheets, soaking for 10-15 hours under the assistance of ultrasound, filtering, and drying to obtain bismuth nitrate intercalation modified hydrotalcite; the weight parts of the raw materials are 5-10 parts of pentahydrate bismuth nitrate, 8-15 parts of nitric acid, 15-20 parts of magnesium-aluminum hydrotalcite nanosheets and 55-72 parts of water;
(2) adding the bismuth nitrate intercalation modified hydrotalcite prepared in the step (1) into an ammonia water solution with the mass concentration of 20-30%, magnetically stirring uniformly, then placing the mixture into a hydrothermal reaction kettle for reaction, and cooling, washing and drying after the reaction is finished to prepare a bismuth oxyhydroxide intercalation hydrotalcite nanosheet; the weight parts of the raw materials are 20-35 parts of bismuth nitrate intercalation modified hydrotalcite and 65-80 parts of ammonia water solution; the temperature of the hydrothermal reaction is 120-140 ℃, and the time is 4-6 h;
(3) performing free pulping treatment on the paper pulp raw pulp, then adding the bismuth oxyhydroxide intercalated hydrotalcite nanosheet prepared in the step (2), pigment and sizing material, and uniformly stirring to prepare flame-retardant paper pulp slurry;
(4) and (4) making the flame-retardant paper pulp slurry prepared in the step (3) into paper by a paper machine, then printing, dyeing and embossing, covering a semitransparent colloid layer on the surface, and cutting and forming to prepare the flame-retardant wallpaper filled with the bismuth oxyhydroxide intercalated hydrotalcite.
2. The preparation method of the flame-retardant wallpaper filled with the bismuth oxyhydroxide intercalated hydrotalcite according to claim 1, which is characterized in that: the ultrasonic frequency of the ultrasonic assistance in the step (1) is 50-80 kHz, and the power density is 0.5-0.8W/cm2。
3. The preparation method of the flame-retardant wallpaper filled with the bismuth oxyhydroxide intercalated hydrotalcite according to claim 1, which is characterized in that: in the flame-retardant paper pulp slurry in the step (3), 67-81 parts by weight of paper pulp raw slurry, 15-20 parts by weight of bismuth oxyhydroxide intercalated hydrotalcite nanosheets, 3-10 parts by weight of pigment and 1-3 parts by weight of sizing material.
4. The preparation method of the flame-retardant wallpaper filled with the bismuth oxyhydroxide intercalated hydrotalcite according to claim 1, which is characterized in that: the pigment in the step (3) is one or more of iron oxide red, iron yellow, chromium oxide green, lead chromium green, iron blue, cobalt blue and ultramarine.
5. The preparation method of the flame-retardant wallpaper filled with the bismuth oxyhydroxide intercalated hydrotalcite according to claim 1, which is characterized in that: and (3) the sizing material is one or more of rosin, alum and starch.
6. The preparation method of the flame-retardant wallpaper filled with the bismuth oxyhydroxide intercalated hydrotalcite according to claim 1, which is characterized in that: and (4) the colloid layer is made of one of a polyethylene film, a polypropylene film and a polyethylene terephthalate film.
7. The flame-retardant wallpaper filled with the bismuth oxyhydroxide intercalated hydrotalcite prepared by the preparation method according to any one of claims 1 to 6.
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