Environment-friendly flame-retardant antibacterial plate and preparation method thereof

Abstract

The invention relates to the technical field of plates, and provides an environment-friendly flame-retardant antibacterial plate and a preparation method thereof. The environment-friendly flame-retardant antibacterial board sequentially comprises wood and a flame-retardant layer from inside to outside, wherein the flame-retardant layer comprises the following raw materials in parts by weight: 50-60 parts of epoxy resin, 10-16 parts of composite fibers, 10-15 parts of a flame retardant, 5-8 parts of a binder and 1-3 parts of a curing agent; the flame retardant comprises ammonium polyphosphate and bis (trifluoromethylsulfonyl) imide zinc; the mass ratio of the ammonium polyphosphate to the bis (trifluoromethylsulfonyl) imide zinc is 20: (1-10). According to the technical scheme, the problem that in the prior art, wood boards are poor in flame retardance and antibacterial property is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of boards, and in particular to an environmentally friendly flame-retardant and antibacterial board and a preparation method thereof. Background Art

[0002] With the improvement of living standards, people pay more and more attention to the safety of buildings, home decoration and other fields. In the interior decoration industry, the potential threat of fire has always been a major safety issue that cannot be ignored. Many wooden boards are flammable. Once a fire occurs, the fire can spread rapidly, causing serious harm to people's lives and property. In addition, wooden boards are very susceptible to moisture and mold in humid environments or high humidity seasons. The bacteria and mold that grow will not only affect the appearance and service life of the boards, but may also release harmful gases that endanger human health. Therefore, how to improve the flame retardancy and antibacterial properties of the boards is a problem that needs to be solved at present. Summary of the invention

[0003] The invention provides an environmentally friendly flame retardant and antibacterial board and a preparation method thereof, which solves the problem of poor flame retardancy and antibacterial properties of wooden boards in the related art.

[0004] The technical solution of the present invention is as follows: The present invention provides an environmentally friendly flame-retardant and antibacterial board, which comprises wood and a flame-retardant layer from the inside to the outside, wherein the flame-retardant layer comprises the following raw materials in parts by weight: 50-60 parts of epoxy resin, 10-16 parts of composite fiber, 10-15 parts of flame retardant, 5-8 parts of binder, and 1-3 parts of curing agent; The flame retardant comprises ammonium polyphosphate and bis(trifluoromethylsulfonyl)zinc imide; the mass ratio of the ammonium polyphosphate to the bis(trifluoromethylsulfonyl)zinc imide is 20:1-10.

[0005] As a further technical solution, the mass ratio of the ammonium polyphosphate to the bis(trifluoromethylsulfonyl)imide zinc is 15:3-5.

[0006] In the present invention, the mass ratio of ammonium polyphosphate to bis(trifluoromethylsulfonyl)imide zinc is limited to 15:3-5, thereby further improving the flame retardancy and antibacterial properties of the environmentally friendly flame retardant and antibacterial sheet.

[0007] As a further technical solution, the composite fiber includes two of carbon fiber, polyester fiber and aramid fiber.

[0008] As a further technical solution, when the composite fiber consists of carbon fiber and aramid fiber, the mass ratio of the carbon fiber to the aramid fiber is 1:1.

[0009] In the present invention, by limiting the composite fiber to consist of carbon fiber and aramid fiber, the flame retardancy and antibacterial property of the environment-friendly flame retardant and antibacterial board are further improved.

[0010] As a further technical solution, the composite fiber further comprises modified nano titanium dioxide, and the modified nano titanium dioxide is nano titanium dioxide modified by aniline-2,4-disulfonic acid.

[0011] In the present invention, the flame retardancy and antibacterial properties of the environment-friendly flame retardant and antibacterial sheet are further improved by adding nano titanium dioxide modified by aniline-2,4-disulfonic acid into the composite fiber.

[0012] As a further technical solution, the mass ratio of the modified nano-titanium dioxide to the carbon fiber and the aramid fiber is 4:1, and the added amount of aniline-2,4-disulfonic acid is 3% to 5% of the mass of the nano-titanium dioxide.

[0013] As a further technical solution, the method for preparing the composite fiber comprises the following steps: A1. Adding carbon fiber and aramid fiber into an acid solution for acidification, and washing with water to obtain modified carbon fiber and modified aramid fiber; A2, adding nano titanium dioxide and aniline-2,4-disulfonic acid into a solvent and mixing them, and drying to obtain modified nano titanium dioxide; A3. Add modified carbon fiber, modified aramid fiber and modified nano titanium dioxide into water, add castor oil polyoxyethylene ether and mix, and obtain composite fiber after drying.

[0014] As a further technical solution, the acid solution is a 1 wt % hydrochloric acid aqueous solution.

[0015] As a further technical solution, in step A2, the solvent is ethanol.

[0016] As a further technical solution, in step A2, the mixing temperature is 30-40° C., and the mixing time is 1-2 h.

[0017] As a further technical solution, in step A3, the mixing temperature is 50-60° C., and the mixing time is 4-7 hours.

[0018] As a further technical solution, the added amount of castor oil polyoxyethylene ether is 6% of the added mass of carbon fiber, aramid fiber and modified nano titanium dioxide.

[0019] As a further technical solution, the binder includes one or both of polyacrylamide and polycarbonate.

[0020] As a further technical solution, the curing agent includes one or more of 4,4'-diaminodiphenyl sulfone, triethylenetetramine, and 4,4'-diaminodiphenylmethane.

[0021] As a further technical solution, the thickness of the flame retardant layer is 0.1-0.3 mm.

[0022] The present invention also provides a method for preparing an environmentally friendly flame-retardant and antibacterial sheet material, comprising the following steps: The raw materials of the flame retardant layer are mixed and coated on the outside of the wood, and after curing, an environmentally friendly flame retardant and antibacterial board is obtained.

[0023] The working principle and beneficial effects of the present invention are: The present invention provides an environmentally friendly flame-retardant and antibacterial board, which is composed of wood and a flame-retardant layer on the outside of the wood, wherein the flame-retardant layer is based on epoxy resin, a flame retardant composed of ammonium polyphosphate and bis(trifluoromethylsulfonyl)imide zinc is added, and the mass ratio of ammonium polyphosphate to bis(trifluoromethylsulfonyl)imide zinc is limited to 20:1-10, thereby improving the flame retardancy and antibacterial properties of the board. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the following embodiments and comparative examples: Castor oil polyoxyethylene ether, model: EL-80; nano titanium dioxide, particle size: 50nm; polyacrylamide, weight average molecular weight: 12 million; polycarbonate, model: PC 3433R XHT1141; carbon fiber, diameter: 6~7μm, length: 1mm; aramid fiber, diameter: 10~20μm, length: 1mm; polyester fiber, diameter: 10~20μm, length: 1mm; epoxy resin, model: E-44; ammonium polyphosphate, particle size: 325 mesh.

[0026] Example 1 A method for preparing an environmentally friendly flame-retardant and antibacterial sheet material comprises the following steps: 50 parts of epoxy resin, 10 parts of composite fiber, 10 parts of flame retardant, 5 parts of polyacrylamide and 1 part of 4,4'-diaminodiphenyl sulfone are mixed and coated on the outside of the wood to form a 0.1 mm thick flame retardant layer, and after curing, an environmentally friendly flame retardant and antibacterial board is obtained; The composite fiber preparation method comprises the following steps: A1. Add 30 g of polyester fiber and 30 g of aramid fiber into 300 mL of hydrochloric acid aqueous solution (1 wt%) for acidification, and wash with water to obtain modified polyester fiber and modified aramid fiber; A2, adding modified polyester fiber and modified aramid fiber into 500 mL of water, adding 3.6 g of castor oil polyoxyethylene ether, heating to 50° C., stirring for 7 h, and drying to obtain composite fiber; The flame retardant is obtained by mixing ammonium polyphosphate and bis(trifluoromethylsulfonyl)imide zinc in a mass ratio of 20:1.

[0027] Example 2 A method for preparing an environmentally friendly flame-retardant and antibacterial sheet material comprises the following steps: 60 parts of epoxy resin, 16 parts of composite fiber, 15 parts of flame retardant, 8 parts of polycarbonate and 3 parts of triethylenetetramine were mixed and coated on the outside of the wood to form a 0.3 mm thick flame retardant layer, and after curing, an environmentally friendly flame retardant and antibacterial board was obtained; The composite fiber preparation method comprises the following steps: A1. Add 30 g of polyester fiber and 30 g of aramid fiber into 300 mL of hydrochloric acid aqueous solution (1 wt%) for acidification, and wash with water to obtain modified polyester fiber and modified aramid fiber; A2, adding modified polyester fiber and modified aramid fiber into 500 mL of water, adding 3.6 g of castor oil polyoxyethylene ether, heating to 60° C., stirring for 4 h, and drying to obtain composite fiber; The flame retardant is obtained by mixing ammonium polyphosphate and bis(trifluoromethylsulfonyl)imide zinc in a mass ratio of 20:1.

[0028] Example 3 The difference between this embodiment and embodiment 1 is that the mass ratio of ammonium polyphosphate to zinc bis(trifluoromethylsulfonyl)imide is 2:1.

[0029] Example 4 The difference between this embodiment and embodiment 1 is that the mass ratio of ammonium polyphosphate to zinc bis(trifluoromethylsulfonyl)imide is 5:1.

[0030] Example 5 The only difference between this embodiment and embodiment 1 is that the mass ratio of ammonium polyphosphate to zinc bis(trifluoromethylsulfonyl)imide is 3:1.

[0031] Example 6 The only difference between this embodiment and embodiment 5 is that the aramid fiber is replaced by an equal amount of carbon fiber.

[0032] Example 7 The only difference between this embodiment and embodiment 5 is that the polyester fiber is replaced by an equal amount of carbon fiber.

[0033] Example 8 The present embodiment is different from the embodiment 7 in that the preparation method of the composite fiber comprises the following steps: A1, adding 30 g of carbon fiber and 30 g of aramid fiber to 300 mL of hydrochloric acid aqueous solution (1 wt %) for acidification, and washing with water to obtain modified carbon fiber and modified aramid fiber; A2. Add modified polyester fiber, modified aramid fiber, 12 g of nano titanium dioxide into 600 mL of water, add 4.32 g of castor oil polyoxyethylene ether, heat to 50° C., stir for 7 h, and then dry to obtain composite fiber.

[0034] Example 9 The only difference between this embodiment and embodiment 7 is that the nano titanium dioxide is replaced by an equal amount of modified nano titanium dioxide; the preparation method of modified nano titanium dioxide comprises the following steps: 30 g of nano titanium dioxide and 0.9 g of aniline-2,4-disulfonic acid are added to 200 mL of ethanol, stirred at 40° C. for 1 h, and dried to obtain modified nano titanium dioxide.

[0035] Example 10 The only difference between this embodiment and embodiment 7 is that the added amount of aniline-2,4-disulfonic acid is 1.5 g.

[0036] Comparative Example 1 The only difference between this comparative example and Example 1 is that the flame retardant is ammonium polyphosphate.

[0037] Comparative Example 2 The only difference between this comparative example and Example 1 is that the flame retardant is bis(trifluoromethylsulfonyl)imide zinc.

[0038] The flame retardant time of the panels prepared in Examples 1 to 10 and Comparative Examples 1 to 2 was measured according to the large plate combustion method in GB 12441-2018 "Surface fire retardant coatings"; the antibacterial rate against Staphylococcus aureus was measured according to the method in GB / T 21866-2008 "Determination of antibacterial properties and antibacterial effects of antibacterial coatings (paint films)"; the test results are shown in Table 1.

[0039] Table 1 Plate performance test results

[0040] Compared with Comparative Examples 1-2, the flame retardancy time and antibacterial rate of the board in Example 1 are higher than those of Comparative Examples 1-2, indicating that the use of ammonium polyphosphate and bis(trifluoromethylsulfonyl)imide zinc as flame retardants can improve the flame retardancy and antibacterial properties of the board.

[0041] Compared with Example 1, Examples 3 to 5 changed the mass ratio of ammonium polyphosphate and bis(trifluoromethylsulfonyl)imide zinc. As a result, the flame retardancy time and antibacterial rate of the boards prepared in Examples 4 to 5 were higher than those in Example 1 and Example 3, indicating that when the mass ratio of ammonium polyphosphate and bis(trifluoromethylsulfonyl)imide zinc is 15:3 to 5, the flame retardancy and antibacterial properties of the boards can be further improved.

[0042] Compared with Example 5, the composition of the composite fiber was changed in Examples 6-7. As a result, the flame retardancy time and antibacterial rate of the board prepared in Example 7 were higher than those of Examples 5 and 6, indicating that when the composite fiber is composed of carbon fiber and aramid fiber, the flame retardancy and antibacterial properties of the board can be further improved.

[0043] Compared with Example 7, in Examples 8 to 10, nano titanium dioxide or modified nano titanium dioxide was added to the composite fiber. As a result, the flame retardancy time and antibacterial rate of the plates prepared in Examples 8 to 10 were higher than those in Example 7, indicating that the addition of nano titanium dioxide can further improve the flame retardancy and antibacterial properties of the plates; by comparing Examples 8 to 10, it was found that in Examples 8 to 10, the nano titanium dioxide was modified by aniline-2,4-disulfonic acid. As a result, the flame retardancy time and antibacterial rate of the plates prepared in Examples 9 to 10 were higher than those in Example 8, indicating that when the addition amount of aniline-2,4-disulfonic acid is 3% to 5% of the mass of nano titanium dioxide, the flame retardancy and antibacterial properties of the plates can be further improved.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An environmentally friendly flame retardant and antibacterial sheet, characterized in that: The material includes wood and a flame retardant layer from the inside to the outside, wherein the flame retardant layer includes the following raw materials in parts by weight: 50-60 parts of epoxy resin, 10-16 parts of composite fiber, 10-15 parts of flame retardant, 5-8 parts of binder, and 1-3 parts of curing agent; The flame retardant comprises ammonium polyphosphate and bis(trifluoromethylsulfonyl)zinc imide; the mass ratio of the ammonium polyphosphate to the bis(trifluoromethylsulfonyl)zinc imide is 20:1-10.

2. The environmentally friendly flame-retardant and antibacterial sheet material according to claim 1, characterized in that: The mass ratio of the ammonium polyphosphate to the bis(trifluoromethylsulfonyl)imide zinc is 15:3-5.

3. The environmentally friendly flame-retardant and antibacterial sheet material according to claim 1, characterized in that: The composite fiber includes two of carbon fiber, polyester fiber and aramid fiber.

4. The environmentally friendly flame-retardant and antibacterial sheet material according to claim 3, characterized in that: When the composite fiber consists of carbon fiber and aramid fiber, the mass ratio of the carbon fiber to the aramid fiber is 1:

1.

5. The environmentally friendly flame-retardant and antibacterial sheet material according to claim 4, characterized in that: The composite fiber also includes modified nano titanium dioxide, which is obtained by modifying nano titanium dioxide with aniline-2,4-disulfonic acid.

6. The environmentally friendly flame retardant and antibacterial sheet material according to claim 5, characterized in that: The mass ratio of the modified nano-titanium dioxide to the carbon fiber and the aramid fiber is 4:1, and the added amount of aniline-2,4-disulfonic acid is 3% to 5% of the mass of the nano-titanium dioxide.

7. The environmentally friendly flame-retardant and antibacterial sheet material according to claim 5, characterized in that: The method for preparing the composite fiber comprises the following steps: A1. Adding carbon fiber and aramid fiber into an acid solution for acidification, and washing with water to obtain modified carbon fiber and modified aramid fiber; A2, adding nano titanium dioxide and aniline-2,4-disulfonic acid into a solvent and mixing them, and drying to obtain modified nano titanium dioxide; A3. Add modified carbon fiber, modified aramid fiber and modified titanium dioxide into water, add castor oil polyoxyethylene ether and mix, and obtain composite fiber after drying.

8. The environmentally friendly flame-retardant and antibacterial sheet material according to claim 1, characterized in that: The binder includes one or both of polyacrylamide and polycarbonate.

9. The environmentally friendly flame-retardant and antibacterial sheet material according to claim 1, characterized in that: The curing agent includes one or more of 4,4'-diaminodiphenyl sulfone, triethylenetetramine, and 4,4'-diaminodiphenylmethane.

10. The method for preparing an environmentally friendly flame-retardant and antibacterial sheet according to any one of claims 1 to 9, characterized in that: The following steps are involved: The raw materials of the flame retardant layer are mixed and coated on the outside of the wood, and after curing, an environmentally friendly flame retardant and antibacterial board is obtained.

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