Flame-retardant antibacterial composition for bamboo wood, flame-retardant antibacterial bamboo wood, preparation method and application

Abstract

The invention belongs to the technical field of flame retardance and antibiosis, and particularly relates to a flame-retardant and antibiosis composition for bamboos, flame-retardant and antibiosis bamboos, a preparation method and application, the flame-retardant and antibiosis composition for bamboos comprises the following components by weight: 5-8% of ammonium phosphate, 5-8% of nucleoside phosphate, 3-5% of phytic acid or phytate, 3-6% of urea, 1-3% of amino acid, and 8-12% of a hydroxyl-containing material; and the balance of water. The hydroxyl-containing material is one or more of soluble nano cellulose, a Tris reagent, sorbitol and erythritol; on the basis of keeping the original color of the bamboo, the flame-retardant and antibacterial effects of the bamboo are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of flame retardant and antibacterial, and particularly relates to a flame retardant and antibacterial composition for bamboo and wood, flame retardant and antibacterial bamboo and wood, a preparation method and an application. Background Art

[0002] With the rapid development of materials such as bamboo and wood, they have been widely used in the fields of construction, home furnishing, etc. However, bamboo and wood materials are flammable materials. Once burned, they will release a large amount of heat in a short time. At the same time, bamboo and wood are often exposed to the environment, closely related to life and in close contact. Therefore, the flame retardant and antibacterial properties of bamboo and wood materials are crucial.

[0003] Currently, mainly by using the delignification process, bamboo and wood are pretreated and then soaked to obtain flame retardant or antibacterial bamboo and wood. However, this destroys the original structure of bamboo and wood, directly reducing the value of bamboo and wood, and it is not convenient to carry out flame retardant and antibacterial treatment on bamboo and wood with higher value. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a flame retardant and antibacterial composition for bamboo and wood, flame retardant and antibacterial bamboo and wood, a preparation method and an application, which can improve the flame retardant and antibacterial effects of bamboo and wood on the basis of retaining the original color of bamboo and wood.

[0005] An embodiment of the present invention provides a flame retardant and antibacterial composition for bamboo and wood, which comprises the following components in parts by weight: ammonium phosphate 5 - 8%, nucleoside phosphate 5 - 8%, phytic acid or phytate 3 - 5%, urea 3 - 6%, amino acid 1 - 3%, hydroxyl-containing material 8 - 12%; the balance is water; The hydroxyl-containing material is one or more of soluble nanocellulose, Tris reagent, sorbitol, erythritol.

[0006] Preferably, it comprises the following components in parts by weight: ammonium phosphate 6 - 7%, nucleoside phosphate 5 - 6%, phytic acid or phytate 3 - 4%, urea 3 - 5%, amino acid 1 - 2%, hydroxyl-containing material 9 - 11%; the balance is water.

[0007] Preferably, it comprises the following components in parts by weight: ammonium phosphate 6%, nucleoside phosphate 5%, phytic acid or phytate 4%, urea 3%, amino acid 1%, hydroxyl-containing material 10%; the balance is water.

[0008] Preferably, the ammonium phosphate is one or more of monoammonium phosphate, diammonium phosphate, triammonium phosphate.

[0009] Preferably, the nucleoside phosphate is one or more of nucleoside diphosphate, nucleoside triphosphate; the phytate is sodium phytate; the amino acid is one or more of glycine, serine.

[0010] An embodiment of the present invention provides a method for preparing the flame-retardant and antibacterial composition for bamboo and wood. Ammonium phosphate, phosphonucleoside, phytic acid or phytate, urea, and amino acid are mixed evenly, the temperature is controlled at 55 - 70 °C, and kept warm for 2 - 4 h. Then an aqueous solution of a hydroxyl group-containing material is added, and kept warm for 2 - 4 h to obtain the flame-retardant and antibacterial composition for bamboo and wood.

[0011] An embodiment of the present invention provides a method for preparing the flame-retardant and antibacterial composition for bamboo and wood, and the aqueous solution of the hydroxyl group-containing material is added in a dropping manner.

[0012] An embodiment of the present invention provides a method for preparing flame-retardant and antibacterial bamboo and wood. The bamboo and wood are immersed in the flame-retardant and antibacterial composition for bamboo and wood, taken out, and dried to obtain the flame-retardant and antibacterial bamboo and wood.

[0013] An embodiment of the present invention provides a flame-retardant and antibacterial bamboo and wood, which is prepared by using the described preparation method.

[0014] An embodiment of the present invention provides an application of the flame-retardant and antibacterial composition for bamboo and wood, which is used for preparing flame-retardant and antibacterial bamboo and wood.

[0015] The beneficial effects of the present invention are as follows: The present invention uses water as a solvent, and ammonium phosphate, phytic acid, and urea are added. In addition, phosphonucleoside, amino acid, soluble nanocellulose, Tris reagent, sorbitol, and erythritol are also added, and the contents of each component are controlled. It can be found through experimental data that it can significantly improve the flame-retardant performance of the material and also has good antibacterial performance. In addition, the flame-retardant and antibacterial composition of the present invention has no color during final molding and will not cover the original color of the bamboo and wood, and can retain the original color of the bamboo and wood. Description of the Drawings

[0016] Figure 1 It is a graph showing the change of the heat release rate of wood and the flame-retardant and antibacterial bamboo and wood of Examples 1 - 3 with time.

[0017] Figure 2 It is the antibacterial performance of the flame-retardant and antibacterial composition for bamboo and wood. Detailed Embodiments

[0018] The following further illustrates the present invention with reference to embodiments, which is convenient for understanding the technical solution of the present invention, but it should not be understood that the scope of the present invention is limited to the following embodiments.

[0019] Example 1 A flame-retardant and antibacterial composition for bamboo and wood, including the following components in parts by weight: 3% of monoammonium phosphate, 3% of diammonium phosphate, 3% of nucleoside diphosphate, 2% of nucleoside triphosphate, 2% of phytic acid, 2% of sodium phytate, 3% of urea, 1% of glycine, 4% of soluble nanocellulose, 2% of Tris reagent, 2% of sorbitol, 2% of erythritol; the balance is water; A preparation method of a flame-retardant and antibacterial composition for bamboo and wood is as follows: Mix monoammonium phosphate, diammonium phosphate, nucleoside diphosphate, nucleoside triphosphate, phytic acid, sodium phytate, urea, glycine, and water evenly, control the temperature at 60 °C, keep warm for 3 h, and then add an aqueous solution containing soluble nanocellulose, Tris reagent, sorbitol, and erythritol dropwise. The dropping time is controlled within 30 min, and keep warm at 60 °C for 3 h to obtain the flame-retardant and antibacterial composition for bamboo and wood.

[0020] A preparation method of flame-retardant and antibacterial bamboo and wood: Immerse the wood in the flame-retardant and antibacterial composition for bamboo and wood for 5 min, take it out and dry it to obtain the flame-retardant and antibacterial bamboo and wood.

[0021] Example 2 The difference between Example 2 and Example 1 is that A flame-retardant and antibacterial composition for bamboo and wood, comprising the following components in parts by weight: 4% monoammonium phosphate, 4% diammonium phosphate, 4% nucleoside diphosphate, 4% nucleoside triphosphate, 3% phytic acid, 2% sodium phytate, 5% urea, 3% glycine, 4% soluble nanocellulose, 2% Tris reagent, 2% sorbitol, 2% erythritol; the balance is water.

[0022] Others are the same as in Example 1.

[0023] Example 3 The difference between Example 3 and Example 1 is that A flame-retardant and antibacterial composition for bamboo and wood, comprising the following components in parts by weight: 3% monoammonium phosphate, 2% diammonium phosphate, 2% nucleoside diphosphate, 3% nucleoside triphosphate, 3% phytic acid, 2% sodium phytate, 6% urea, 2% glycine, 2% soluble nanocellulose, 3% Tris reagent, 3% sorbitol, 2% erythritol; the balance is water.

[0024] Others are the same as in Example 1.

[0025] Example 4 Put 10 mg of the flame-retardant and antibacterial composition for bamboo and wood of Examples 1-3 into a test tube containing 2 mL of an activated bacterial solution of Staphylococcus aureus ( S.aureus ) or Escherichia coli ( E.coli ), dilute it to a 1×10 6 CFU / mL solution, and then incubate it at 37 °C. Subsequently, dilute it 100 times with a sterile culture solution, and coat 20 μL of the diluted solution on an agar medium. After incubating at 37 °C for 18 hours, count the colonies of the sample.

[0026] After experimental testing, the performance results are as Figure 1 (cone calorimeter heat release value), Figure 2as shown in (Antibacterial Results) and Table 1 (Cone calorimeter heat release values and related key data).

[0027] Table 1 Heat release rate and related core data of wood and its modified wood

[0028] Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that A flame retardant and antibacterial composition for bamboo and wood, comprising the following components in parts by weight: 3% of monoammonium phosphate, 3% of diammonium phosphate, 3% of nucleoside diphosphate, 2% of nucleoside triphosphate, 2% of phytic acid, 2% of sodium phytate, 3% of urea, 1% of glycine; the balance is water.

[0029] A preparation method of a flame retardant and antibacterial composition for bamboo and wood is Mix monoammonium phosphate, diammonium phosphate, nucleoside diphosphate, nucleoside triphosphate, phytic acid, sodium phytate, urea, glycine, and water evenly, control the temperature at 60 °C, and keep warm for 6 h to obtain a flame retardant and antibacterial composition for bamboo and wood.

[0030] Others are the same as in Example 1.

[0031] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that A flame retardant and antibacterial composition for bamboo and wood, comprising the following components in parts by weight: 3% of monoammonium phosphate, 3% of diammonium phosphate, 2% of phytic acid, 2% of sodium phytate, 3% of urea, 4% of soluble nanocellulose, 2% of Tris reagent, 2% of sorbitol, 2% of erythritol; the balance is water.

[0032] Others are the same as in Example 1.

[0033] Comparative Example 3 The difference between Comparative Example 3 and Example 1 is that A flame retardant and antibacterial composition for bamboo and wood, comprising the following components in parts by weight: 3% of monoammonium phosphate, 3% of diammonium phosphate, 6% of nucleoside diphosphate, 6% of nucleoside triphosphate, 2% of phytic acid, 2% of sodium phytate, 3% of urea, 5% of glycine, 4% of soluble nanocellulose, 2% of Tris reagent, 2% of sorbitol, 2% of erythritol; the balance is water.

[0034] Others are the same as in Example 1.

[0035] Test the flame retardant properties of Comparative Examples 1-3, and the results are shown in Table 2 (Cone calorimeter heat release values and related key data).

[0036] Table 2 Heat release rate and related core data of woods in Comparative Examples 1-3

[0037] As can be seen from Table 1-2, when the polyhydroxy material is not added, the flame retardancy of the wood drops severely. The main reason is the lack of char-forming groups and the release of water during combustion, such as in Comparative Example 1; while reducing the dosage of nucleoside diphosphate and nucleoside triphosphate (such as Comparative Example 2) or changing the ratio between the two (such as Comparative Example 3) will also affect the flame retardancy of the flame retardant liquid on the wood. The main reason may be the lack of phosphorus-containing compounds that can catalyze char formation and hydroxyl groups that can dehydrate to form char.

[0038] Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present application is limited to these examples; under the concept of the present application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of one or more embodiments of the present application as described above, which are not provided in detail for the sake of brevity.

[0039] One or more embodiments of the present application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present application shall be included within the protection scope of the present application.

Claims

1. A flame retardant and antibacterial composition for bamboo and wood, characterized in that, It comprises the following components in parts by weight: 5 - 8% of ammonium phosphate salt, 5 - 8% of nucleoside phosphate, 3 - 5% of phytic acid or phytate, 3 - 6% of urea, 1 - 3% of amino acid, 8 - 12% of hydroxyl group-containing material; the balance is water. The hydroxyl group-containing material is one or more of soluble nanocellulose, Tris reagent, sorbitol, and erythritol.

2. The flame-retardant and antibacterial composition for bamboo and wood according to claim 1, characterized in that, It comprises the following components in parts by weight: 6 - 7% of ammonium phosphate salt, 5 - 6% of nucleoside phosphate, 3 - 4% of phytic acid or phytate, 3 - 5% of urea, 1 - 2% of amino acid, 9 - 11% of hydroxyl group-containing material; the balance is water.

3. The flame-retardant and antibacterial composition for bamboo and wood according to claim 1, characterized in that, It comprises the following components in parts by weight: 6% of ammonium phosphate salt, 5% of nucleoside phosphate, 4% of phytic acid or phytate, 3% of urea, 1% of amino acid, 10% of hydroxyl group-containing material; the balance is water.

4. The flame-retardant and antibacterial composition for bamboo and wood according to any one of claims 1 to 3, characterized in that, The ammonium phosphate salt is one or more of monoammonium phosphate, diammonium phosphate, and triammonium phosphate.

5. The flame-retardant and antibacterial composition for bamboo and wood according to any one of claims 1-3, characterized in that, The nucleoside phosphate is one or more of nucleoside diphosphate and nucleoside triphosphate; the phytate is sodium phytate; the amino acid is one or more of glycine and serine.

6. A preparation method of the flame-retardant and antibacterial composition for bamboo and wood according to any one of claims 1-5, characterized in that, Mix ammonium phosphate salt, nucleoside phosphate, phytic acid or phytate, urea, and amino acid evenly, control the temperature at 55 - 70 °C, keep warm for 2 - 4 h, then add the aqueous solution of the hydroxyl group-containing material, and keep warm for 2 - 4 h to obtain the flame-retardant and antibacterial composition for bamboo and wood.

7. A method for preparing a flame-retardant and antibacterial composition for bamboo and wood according to any one of claims 1-5, characterized in that, The aqueous solution of the hydroxyl group-containing material is added in a dropwise manner.

8. A preparation method of flame-retardant and antibacterial bamboo and wood, characterized in that, Soak bamboo and wood in the flame-retardant and antibacterial composition for bamboo and wood as described in any one of claims 1 - 5 or soak bamboo and wood in the flame-retardant and antibacterial composition for bamboo and wood obtained by the preparation method as described in claim 6 or 7, take it out, and dry it to obtain flame-retardant and antibacterial bamboo and wood.

9. A flame-retardant and antibacterial bamboo-wood, characterized in that, It is prepared by the preparation method as described in claim 8.

10. Application of a flame retardant and antibacterial composition for bamboo and wood, characterized in that, It is used for preparing flame-retardant and antibacterial bamboo and wood.

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