Strong-curing and high-wetting dust suppression material for coal mine environment and preparation method of strong-curing and high-wetting dust suppression material

Abstract

The invention discloses a strong-curing and high-wetting type dust suppression material for a coal mine environment, and relates to the technical field of spray dust suppression. 2-6 parts of tamarind gum; 2-6 parts of silk fibroin; 1-3 parts of potassium permanganate; 2 to 6 parts of dodecyl dimethyl amine oxide; 2-6 parts of fatty alcohol polyoxyethylene ether sodium sulfate; and 1-3 parts of glycerol. The strong-curing and high-wetting dust suppression material has the beneficial effects that the prepared strong-curing and high-wetting dust suppression material has good wettability, dust is rapidly wetted when the material is sprayed on the surface of coal dust, the basic dust control effect is achieved, meanwhile, coal dust particles can be adhered into large-particle dust by combining the good crusting property and cohesiveness of the material, the large-particle dust is settled on the surface of a coal seam to form a curing layer, and the dust suppression effect is good. Due to the good crusting hardness, the cured layer has good external force interference resistance, the good dust suppression performance can still be achieved when the cured layer is damaged by external force such as wind erosion, and reentrainment of dust is prevented; the method has the advantages of easily available raw materials, simple preparation process, low cost and easy industrial production.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine environment spray dust suppression, and in particular to a coal mine environment strong solidification, high wettability dust suppression material and a preparation method thereof. Background Art

[0002] During coal mining and transportation, a large amount of dust is released, causing serious harm to workers' health and the environment. Dust can cause health problems such as respiratory diseases and pneumoconiosis, and also affect the surrounding ecological environment, such as reduced air quality and soil pollution. Therefore, controlling coal mine dust is an important task to protect workers' health and improve environmental quality.

[0003] At present, the commonly used dust suppression measures in coal mines include spray dust reduction, chemical dust suppression and ventilation dust removal, among which the method of combining spray and chemical dust suppression has been widely used. However, due to the hydrophobicity of coal, fine coal dust is often difficult to be fully wetted by water. At the same time, the water evaporates quickly, and frequent spraying is required to maintain the dust suppression effect, which not only wastes water resources, but also increases the investment of manpower and material resources. In contrast, chemical dust suppression technology can effectively wet and bond coal dust, thereby achieving a more lasting dust suppression effect and reducing the need for repeated spraying. However, in actual applications, dust suppression materials have disadvantages such as low crust strength and insufficient wettability, which seriously restrict the promotion and application of chemical dust suppressants.

[0004] Therefore, it is urgent to develop a dust suppressant with dust suppression, crusting and wettability to solve this problem. Summary of the invention

[0005] In order to solve the above technical problems, the present invention discloses a highly solidified and highly wettable dust suppression material for a coal mine environment and a preparation method thereof. The material has good wettability and can quickly wet the dust when sprayed on the surface of the coal dust, thereby achieving a basic dust control effect. At the same time, combined with its own good crusting and adhesion properties, the coal dust particles can adhere to form large dust particles and settle on the surface of the coal seam to form a solidified layer. The good crusting hardness of the solidified layer makes the solidified layer have good resistance to external interference, and can still exert good dust suppression performance in the face of external forces such as wind erosion, thereby preventing the occurrence of secondary dust. The material has multiple excellent properties such as dust suppression, film-forming, wettability, foaming, adhesion, and environmental protection.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A highly solidified and highly wettable dust suppression material for coal mine environment, the raw materials selected are calculated by weight percentage and include:

[0008] 5-8 parts of cassia seed gum;

[0009] 2-6 parts of tamarind gum;

[0010] 2 - 6 parts of fibroin;

[0011] 1 - 3 parts of potassium permanganate;

[0012] 2 - 6 parts of dodecyldimethylamine oxide;

[0013] 2 - 6 parts of sodium lauryl polyoxyethylene ether sulfate;

[0014] 1 - 3 parts of glycerol;

[0015] The balance is distilled water.

[0016] The present invention also discloses a preparation method of a strongly - curable and highly - wettable dust - suppressing material for coal mine environment, and the specific steps are as follows:

[0017] S1: Add a certain amount of cassia gum and distilled water into a beaker, heat and stir in a constant - temperature water bath at 60 °C for 1 h to obtain a cassia gum aqueous solution; add a certain amount of tamarind gum and distilled water into a beaker, heat and stir in a constant - temperature water bath at 70 °C for 1 h to obtain a tamarind gum aqueous solution; add a certain amount of fibroin and distilled water into a beaker, heat and stir in a constant - temperature water bath at 60 °C for 1 h to obtain a fibroin aqueous solution;

[0018] S2: Raise the temperature of the magnetic - stirring water bath to 70 °C, add a certain amount of potassium permanganate to the cassia gum aqueous solution and stir, and the oxidation time is 20 min to obtain an oxidized cassia gum solution;

[0019] S3: Add the tamarind gum aqueous solution and the fibroin aqueous solution into the oxidized cassia gum solution, adjust the solution to be acidic and set the temperature of the magnetic - stirring water bath to 80 °C, and carry out magnetic - stirring reaction for 3 h to obtain a cross - linked product aqueous solution;

[0020] S4: After adjusting the acidity and alkalinity of the cross - linked product aqueous solution to neutral by adding a certain amount of glacial acetic acid or sodium hydroxide, add a certain amount of dodecyldimethylamine oxide, sodium lauryl polyoxyethylene ether sulfate, and glycerol, and carry out magnetic - stirring at 50 °C for 30 min to obtain the strongly - curable and highly - wettable dust - suppressing material.

[0021] Further, the selected raw materials, calculated by weight percentage, include

[0022] Cassia gum: Tamarind gum: Fibroin: Potassium permanganate: Dodecyldimethylamine oxide: Sodium lauryl polyoxyethylene ether sulfate: Glycerol = 4:3:3:2:3:3:2.

[0023] Further, during the preparation process, under the condition of a total amount of 200 mL of distilled water, the weights of each raw material are respectively:

[0024] Cassia gum 0.8 g;

[0025] Tamarind gum 0.6 g;

[0026] Silk fibroin 0.6 g;

[0027] Potassium permanganate 0.4 g;

[0028] Dodecyldimethylamine oxide 0.6 g;

[0029] Sodium lauryl polyoxyethylene ether sulfate 0.6 g;

[0030] Glycerol 0.4 g.

[0031] Furthermore, during the preparation process, cassia gum is modified under the oxidation of potassium permanganate to form oxidized cassia gum, and its reaction equation is:

[0032] (1)

[0033] In this reaction, cassia gum is modified under the oxidation of potassium permanganate, and some of the hydroxyl groups on cassia gum are oxidized to aldehyde groups, making it more chemically active and laying the foundation for the following reaction.

[0034] Oxidized cassia gum reacts with tamarind gum and silk fibroin to form a cross-linked product, and its reaction equation is:

[0035] (2)

[0036] In this reaction, oxidized cassia gum reacts with tamarind gum and silk fibroin. Among them, two aldehyde groups on oxidized cassia gum are cross-linked with the hydroxyl group on tamarind gum and the amino group on silk fibroin respectively, forming a more stable macromolecular cross-linked network, thereby improving the properties of the dust suppressant material such as adhesiveness, film-forming property, and stability.

[0037] During the preparation of this strongly curable and highly wettable dust suppressant material, the selected raw materials have the following characteristics:

[0038] Cassia gum is a natural polysaccharide material that has been attracting increasing attention in the food industry and other application fields and is widely used due to its unique functional properties. It has excellent water retention and adhesiveness, can form an effective protective film on the surface of coal samples, and reduce the secondary dusting of coal dust. In addition, cassia gum also performs well in promoting the foaming, thickening, and gelation of substances, and cassia gum is a natural and environmentally friendly material with less impact on the environment after use, meeting the requirements of modern sustainable development.

[0039] Tamarind gum is a natural plant gum commonly used in the food industry, extracted from the fruits of the tamarind tree. It has excellent thickening, stabilizing and gelling properties, and can enhance the stability of products in a variety of applications. Therefore, it exhibits good performance in dust suppression and environmental protection, and is an effective solution for controlling coal dust pollution.

[0040] Silk fibroin is a natural fibrous protein, mainly from silk, especially the silk glands of the silkworm. Silk fibroin has excellent biocompatibility and biodegradability, can bind well with organisms, and is suitable for various biomedical applications. In addition, the high strength and excellent stretchability of silk fibroin make it an ideal choice in materials science, and it is often used to make high-performance fibers and membrane materials. It also has good water retention and breathability properties, and can retain moisture to a certain extent, thus reducing water loss.

[0041] Potassium permanganate is a common strong oxidant with strong oxidizing ability. It can undergo chemical reactions under acidic, alkaline and neutral conditions, and is commonly used in chemical experiments and industrial processes that require oxidation reactions.

[0042] Dodecyldimethylamine oxide is a commonly used amphoteric surfactant with good wetting and foaming properties. Its chemical properties enable it to remain stable under various environmental conditions and be compatible with a variety of other components.

[0043] Sodium lauryl polyoxyethylene ether sulfate is a common anionic surfactant, currently widely used in personal care products and detergents. Its molecular structure contains hydrophilic and hydrophobic parts, enabling it to effectively reduce the surface tension of water and having good wetting, cleaning and foaming properties.

[0044] Glycerol is a common water-retaining agent that can absorb and lock in moisture. It has three hydroxyl groups, which enable glycerol to form hydrogen bonds with water molecules, significantly enhancing its moisture retention ability. Its water-retaining property makes glycerol not only increase the water content of products, but also prevent water evaporation.

[0045] The beneficial effects of the present invention are

[0046] (1) Potassium permanganate oxidizes some of the hydroxyl groups on cassia gum, converting the hydroxyl groups into aldehyde groups, which enhances the activity of the functional compounds in cassia gum. Aldehyde groups are more electrophilic than hydroxyl groups and can participate in a variety of chemical reactions, providing rich reaction paths for subsequent chemical synthesis.

[0047] (2) By chemically crosslinking the aldehyde groups of oxidized cassia gum with the hydroxyl groups of tamarind gum and the amino groups of silk fibroin to form stable covalent bonds, this crosslinked structure significantly enhances the intermolecular forces between the materials, thereby improving the overall adhesion. In the dust suppressant material, stronger adhesion enables particulate matter to adhere to the substrate more efficiently, reducing dust emissions. The three-dimensional network structure formed by crosslinking provides better film-forming properties for the material. The crosslinked macromolecules enable the film to achieve better uniformity and continuity during application. At the same time, crosslinking enhances the mechanical strength and toughness of the material, extends the service life of the dust suppressant, and realizes the functional improvement of the material.

[0048] (3) The compound combination of dodecyldimethylamine oxide and sodium lauryl polyoxyethylene ether sulfate can significantly improve the wettability of coal. This compound utilization of the synergistic effect of the two surfactants reduces the surface tension of the coal surface, making it easier for water to penetrate and distribute on the coal surface. In addition, the improved wettability helps to improve the dispersion of coal in water, further improving the overall hydration of coal.

[0049] (4) The raw materials selected in the present invention are easily available, the preparation process is simple, the cost is low, and it is more suitable for industrial production.

[0050] (5) This strongly curable and highly wettable dust suppressant material has good dust suppression and film-forming properties, can effectively adsorb coal dust particles, and combined with its excellent film-forming performance, can better coat the dust particles, resist external force erosion, and effectively prevent the secondary flying of coal dust.

[0051] In summary, the strongly curable and highly wettable dust suppressant material prepared by the present invention has various excellent properties such as dust suppression, film-forming, wettability, foaming, adhesion, and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a schematic process flow diagram of the present invention;

[0053] Figure 2 It is a graph showing the test results of wettability in the examples of the present invention;

[0054] Figure 3 It is a graph showing the test results of crust hardness in the examples of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0055] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0056] The present invention discloses a strongly curable and highly wettable dust suppressant material for coal mine environments. The selected raw materials are calculated by weight percentage and include:

[0057] Cassia seed gum: 5 - 8 parts;

[0058] Tamarind gum: 2 - 6 parts;

[0059] Silk fibroin: 2 - 6 parts;

[0060] Potassium permanganate: 1 - 3 parts;

[0061] Lauryl dimethylamine oxide: 2 - 6 parts;

[0062] Sodium lauryl polyoxyethylene ether sulfate: 2 - 6 parts;

[0063] Glycerol: 1 - 3 parts;

[0064] The balance is distilled water.

[0065] Example 1

[0066] A preparation method of a strongly curable and highly wettable dust suppressant material for coal mine environments. The technological process is as Figure 1 shown, and the specific steps are as follows:

[0067] (1) Add 0.6 g of cassia seed gum and 100 mL of distilled water to a beaker, heat and stir in a 60 °C constant temperature water bath for 1 h to obtain a cassia seed gum aqueous solution. Add 0.4 g of tamarind gum and 50 mL of distilled water to a beaker, heat and stir in a 70 °C constant temperature water bath for 1 h to obtain a tamarind gum aqueous solution. Add 0.4 g of silk fibroin and 50 mL of distilled water to a beaker, heat and stir in a 60 °C constant temperature water bath for 1 h to obtain a silk fibroin aqueous solution;

[0068] (2) Raise the temperature of the magnetic stirring water bath to 70 °C, add 0.2 g of potassium permanganate to the cassia seed gum aqueous solution and stir. The oxidation time is 20 min to obtain an oxidized cassia seed gum solution;

[0069] (3) Add the tamarind glue aqueous solution and the silk fibroin aqueous solution to the oxidized cassia gum solution, adjust the solution to be acidic, set the temperature of the magnetic stirring water bath to 80 °C, and magnetically stir and react for 3 h to obtain a cross-linked product aqueous solution;

[0070] (4) After adding a certain amount of glacial acetic acid or sodium hydroxide to adjust the acidity and alkalinity of the cross-linked product aqueous solution to neutral, add 0.6 g of dodecyldimethylamine oxide, 0.6 g of sodium lauryl polyoxyethylene ether sulfate, and 0.4 g of glycerol thereto, and magnetically stir at 50 °C for 30 min to obtain a strongly cured and highly wettable dust suppressant material.

[0071] Example 2

[0072] A preparation method of a strongly cured and highly wettable dust suppressant material for coal mine environment, specifically comprising the following steps:

[0073] (1) Add 0.6 g of cassia gum and 100 mL of distilled water to a beaker, heat and stir in a 60 °C constant temperature water bath for 1 h to obtain a cassia gum aqueous solution. Add 0.6 g of tamarind gum and 50 mL of distilled water to a beaker, heat and stir in a 70 °C constant temperature water bath for 1 h to obtain a tamarind gum aqueous solution. Add 0.6 g of silk fibroin and 50 mL of distilled water to a beaker, heat and stir in a 60 °C constant temperature water bath for 1 h to obtain a silk fibroin aqueous solution;

[0074] (2) Raise the temperature of the magnetic stirring water bath to 70 °C, add 0.4 g of potassium permanganate to the cassia gum aqueous solution and stir, and the oxidation time is 20 min to obtain an oxidized cassia gum solution;

[0075] (3) Add the tamarind glue aqueous solution and the silk fibroin aqueous solution to the oxidized cassia gum solution, adjust the solution to be acidic, set the temperature of the magnetic stirring water bath to 80 °C, and magnetically stir and react for 3 h to obtain a cross-linked product aqueous solution;

[0076] (4) After adding a certain amount of glacial acetic acid or sodium hydroxide to adjust the acidity and alkalinity of the cross-linked product aqueous solution to neutral, add 0.6 g of dodecyldimethylamine oxide, 0.6 g of sodium lauryl polyoxyethylene ether sulfate, and 0.4 g of glycerol thereto, and magnetically stir at 50 °C for 30 min to obtain a strongly cured and highly wettable dust suppressant material.

[0077] Example 3

[0078] A preparation method of a strongly cured and highly wettable dust suppressant material for coal mine environment, specifically comprising the following steps:

[0079] (1) Add 0.6 g of cassia gum and 100 mL of distilled water to a beaker, heat and stir in a constant temperature water bath at 60 °C for 1 h to obtain a cassia gum aqueous solution. Add 0.8 g of tamarind gum and 50 mL of distilled water to a beaker, heat and stir in a constant temperature water bath at 70 °C for 1 h to obtain a tamarind gum aqueous solution. Add 0.8 g of silk fibroin and 50 mL of distilled water to a beaker, heat and stir in a constant temperature water bath at 60 °C for 1 h to obtain a silk fibroin aqueous solution;

[0080] (2) Raise the temperature of the magnetic stirring water bath to 70 °C, add 0.6 g of potassium permanganate to the cassia gum aqueous solution and stir. The oxidation time is 20 min to obtain an oxidized cassia gum solution;

[0081] (3) Add the tamarind gum aqueous solution and the silk fibroin aqueous solution to the oxidized cassia gum solution, adjust the solution to be acidic and set the temperature of the magnetic stirring water bath to 80 °C, and magnetically stir and react for 3 h to obtain a cross-linked product aqueous solution;

[0082] (4) After adding a certain amount of glacial acetic acid or sodium hydroxide to adjust the acidity and alkalinity of the cross-linked product aqueous solution to neutral, add 0.6 g of lauryldimethylamine oxide, 0.6 g of sodium lauryl polyoxyethylene ether sulfate, and 0.4 g of glycerol, and magnetically stir at 50 °C for 30 min to obtain a strongly solidified and highly wettable dust suppressant material.

[0083] Example 4

[0084] A preparation method of a strongly solidified and highly wettable dust suppressant material for coal mine environment, specifically including the following steps:

[0085] (1) Add 0.8 g of cassia gum and 100 mL of distilled water to a beaker, heat and stir in a constant temperature water bath at 60 °C for 1 h to obtain a cassia gum aqueous solution. Add 0.4 g of tamarind gum and 50 mL of distilled water to a beaker, heat and stir in a constant temperature water bath at 70 °C for 1 h to obtain a tamarind gum aqueous solution. Add 0.6 g of silk fibroin and 50 mL of distilled water to a beaker, heat and stir in a constant temperature water bath at 60 °C for 1 h to obtain a silk fibroin aqueous solution;

[0086] (2) Raise the temperature of the magnetic stirring water bath to 70 °C, add 0.6 g of potassium permanganate to the cassia gum aqueous solution and stir. The oxidation time is 20 min to obtain an oxidized cassia gum solution;

[0087] (3) Add the tamarind gum aqueous solution and the silk fibroin aqueous solution to the oxidized cassia gum solution, adjust the solution to be acidic and set the temperature of the magnetic stirring water bath to 80 °C, and magnetically stir and react for 3 h to obtain a cross-linked product aqueous solution;

[0088] (4) After adding a certain amount of glacial acetic acid or sodium hydroxide to adjust the acidity and alkalinity of the cross-linked product aqueous solution to neutral, add 0.6 g of lauryldimethylamine oxide, 0.6 g of sodium lauryl polyoxyethylene ether sulfate, and 0.4 g of glycerin thereto, and stir magnetically at 50 °C for 30 min to obtain a strongly solidified and highly wettable dust suppressant material.

[0089] Example 5

[0090] A preparation method of a strongly solidified and highly wettable dust suppressant material for coal mine environment, specifically comprising the following steps:

[0091] (1) Add 0.8 g of cassia seed gum and 100 mL of distilled water to a beaker, heat and stir in a 60 °C constant temperature water bath for 1 h to obtain a cassia seed gum aqueous solution. Add 0.6 g of tamarind gum and 50 mL of distilled water to a beaker, heat and stir in a 70 °C constant temperature water bath for 1 h to obtain a tamarind gum aqueous solution. Add 0.8 g of silk fibroin and 50 mL of distilled water to a beaker, heat and stir in a 60 °C constant temperature water bath for 1 h to obtain a silk fibroin aqueous solution;

[0092] (2) Raise the temperature of the magnetic stirring water bath to 70 °C, add 0.2 g of potassium permanganate to the cassia seed gum aqueous solution and stir, and the oxidation time is 20 min to obtain an oxidized cassia seed gum solution;

[0093] (3) Add the tamarind gum aqueous solution and the silk fibroin aqueous solution to the oxidized cassia seed gum solution, adjust the solution to be acidic and set the temperature of the magnetic stirring water bath to 80 °C, and stir magnetically for 3 h to obtain a cross-linked product aqueous solution;

[0094] (4) After adding a certain amount of glacial acetic acid or sodium hydroxide to adjust the acidity and alkalinity of the cross-linked product aqueous solution to neutral, add 0.6 g of lauryldimethylamine oxide, 0.6 g of sodium lauryl polyoxyethylene ether sulfate, and 0.4 g of glycerin thereto, and stir magnetically at 50 °C for 30 min to obtain a strongly solidified and highly wettable dust suppressant material.

[0095] Example 6

[0096] A preparation method of a strongly solidified and highly wettable dust suppressant material for coal mine environment, specifically comprising the following steps:

[0097] (1) Add 0.8 g of cassia seed gum and 100 mL of distilled water to a beaker, heat and stir in a 60 °C constant temperature water bath for 1 h to obtain a cassia seed gum aqueous solution. Add 0.8 g of tamarind gum and 50 mL of distilled water to a beaker, heat and stir in a 70 °C constant temperature water bath for 1 h to obtain a tamarind gum aqueous solution. Add 0.4 g of silk fibroin and 50 mL of distilled water to a beaker, heat and stir in a 60 °C constant temperature water bath for 1 h to obtain a silk fibroin aqueous solution;

[0098] (2) Raise the temperature of the magnetic stirring water bath to 70 °C, add 0.4 g of potassium permanganate to the aqueous solution of cassia gum and stir. The oxidation time is 20 min to obtain an oxidized cassia gum solution.

[0099] (3) Add the aqueous solution of tamarind gum and the aqueous solution of silk fibroin to the oxidized cassia gum solution, adjust the solution to be acidic and set the temperature of the magnetic stirring water bath to 80 °C, and carry out magnetic stirring reaction for 3 h to obtain an aqueous solution of the cross-linked product.

[0100] (4) After adding a certain amount of glacial acetic acid or sodium hydroxide to adjust the acidity and alkalinity of the aqueous solution of the cross-linked product to neutral, add 0.6 g of lauryldimethylamine oxide, 0.6 g of sodium lauryl polyoxyethylene ether sulfate, and 0.4 g of glycerol, and carry out magnetic stirring at 50 °C for 30 min to obtain a strongly cured and highly wetting dust suppressant material.

[0101] Example 7

[0102] A preparation method of a strongly cured and highly wetting dust suppressant material for coal mine environment, specifically including the following steps:

[0103] (1) Add 1 g of cassia gum and 100 mL of distilled water to a beaker, heat and stir in a constant temperature water bath at 60 °C for 1 h to obtain an aqueous solution of cassia gum. Add 0.4 g of tamarind gum and 50 mL of distilled water to a beaker, heat and stir in a constant temperature water bath at 70 °C for 1 h to obtain an aqueous solution of tamarind gum. Add 0.8 g of silk fibroin and 50 mL of distilled water to a beaker, heat and stir in a constant temperature water bath at 60 °C for 1 h to obtain an aqueous solution of silk fibroin.

[0104] (2) Raise the temperature of the magnetic stirring water bath to 70 °C, add 0.4 g of potassium permanganate to the aqueous solution of cassia gum and stir. The oxidation time is 20 min to obtain an oxidized cassia gum solution.

[0105] (3) Add the aqueous solution of tamarind gum and the aqueous solution of silk fibroin to the oxidized cassia gum solution, adjust the solution to be acidic and set the temperature of the magnetic stirring water bath to 80 °C, and carry out magnetic stirring reaction for 3 h to obtain an aqueous solution of the cross-linked product.

[0106] (4) After adding a certain amount of glacial acetic acid or sodium hydroxide to adjust the acidity and alkalinity of the aqueous solution of the cross-linked product to neutral, add 0.6 g of lauryldimethylamine oxide, 0.6 g of sodium lauryl polyoxyethylene ether sulfate, and 0.4 g of glycerol, and carry out magnetic stirring at 50 °C for 30 min to obtain a strongly cured and highly wetting dust suppressant material.

[0107] Example 8

[0108] A preparation method of a strongly solidified and highly wettable dust suppressant material for coal mine environment, specifically including the following steps:

[0109] (1) Add 1 g of cassia gum and 100 mL of distilled water into a beaker, heat and stir in a constant temperature water bath at 60 °C for 1 h to obtain a cassia gum aqueous solution. Add 0.6 g of tamarind gum and 50 mL of distilled water into a beaker, heat and stir in a constant temperature water bath at 70 °C for 1 h to obtain a tamarind gum aqueous solution. Add 0.4 g of silk fibroin and 50 mL of distilled water into a beaker, heat and stir in a constant temperature water bath at 60 °C for 1 h to obtain a silk fibroin aqueous solution;

[0110] (2) Raise the temperature of the magnetic stirring water bath to 70 °C, add 0.6 g of potassium permanganate to the cassia gum aqueous solution and stir, with an oxidation time of 20 min, to obtain an oxidized cassia gum solution;

[0111] (3) Add the tamarind gum aqueous solution and the silk fibroin aqueous solution into the oxidized cassia gum solution, adjust the solution to be acidic and set the temperature of the magnetic stirring water bath to 80 °C, and magnetically stir and react for 3 h to obtain a cross-linked product aqueous solution;

[0112] (4) After adding a certain amount of glacial acetic acid or sodium hydroxide to adjust the acidity and alkalinity of the cross-linked product aqueous solution to neutral, add 0.6 g of dodecyldimethylamine oxide, 0.6 g of sodium lauryl polyoxyethylene ether sulfate, and 0.4 g of glycerol, and magnetically stir at 50 °C for 30 min to obtain a strongly solidified and highly wettable dust suppressant material.

[0113] Example 9

[0114] A preparation method of a strongly solidified and highly wettable dust suppressant material for coal mine environment, specifically including the following steps:

[0115] (1) Add 1 g of cassia gum and 100 mL of distilled water into a beaker, heat and stir in a constant temperature water bath at 60 °C for 1 h to obtain a cassia gum aqueous solution. Add 0.8 g of tamarind gum and 50 mL of distilled water into a beaker, heat and stir in a constant temperature water bath at 70 °C for 1 h to obtain a tamarind gum aqueous solution. Add 0.6 g of silk fibroin and 50 mL of distilled water into a beaker, heat and stir in a constant temperature water bath at 60 °C for 1 h to obtain a silk fibroin aqueous solution;

[0116] (2) Raise the temperature of the magnetic stirring water bath to 70 °C, add 0.2 g of potassium permanganate to the cassia gum aqueous solution and stir, with an oxidation time of 20 min, to obtain an oxidized cassia gum solution;

[0117] (3) Add the tamarind glue aqueous solution and the silk fibroin aqueous solution to the oxidized cassia gum solution, adjust the solution to be acidic, set the temperature of the magnetic stirring water bath to 80 °C, and magnetically stir and react for 3 h to obtain a cross-linked product aqueous solution;

[0118] (4) After adding a certain amount of glacial acetic acid or sodium hydroxide to adjust the acidity and alkalinity of the cross-linked product aqueous solution to neutral, add 0.6 g of lauryldimethylamine oxide, 0.6 g of sodium lauryl polyoxyethylene ether sulfate, and 0.4 g of glycerin thereto, and magnetically stir at 50 °C for 30 min to obtain a strongly cured and highly wetting dust suppressant material.

[0119] Comparative Example 1

[0120] Dissolve 0.6 g of cassia gum, 0.6 g of lauryldimethylamine oxide, and 0.4 g of glycerin in 200 mL of distilled water to obtain the aqueous solution of Comparative Example 1.

[0121] Comparative Example 2

[0122] Dissolve 0.6 g of silk fibroin, 0.6 g of sodium lauryl polyoxyethylene ether sulfate, and 0.4 g of glycerin in 200 mL of distilled water to obtain the aqueous solution of Comparative Example 2.

[0123] Next, the wettability, crust hardness, and dust suppression performance of the strongly cured and highly wetting dust suppressant materials prepared in Examples 1-9 and Comparative Examples 1-2 were tested.

[0124] The wettability test method is as follows:

[0125] Adopt the coal powder sedimentation experiment method. Slowly pour 0.3 g of coal powder (200 mesh) into a test tube containing 40 mL of the corresponding solution of the example and the comparative example, and record the time from when the coal powder contacts the water surface to complete sedimentation. The sedimentation time is as Figure 2 shown. The maximum sedimentation time of Examples 1-9 is 38 s, while the sedimentation times of Comparative Examples 1 and 2 are 66 s and 53 s respectively, both higher than the maximum sedimentation time in the examples. This is because the synergistic effect of neutral and anionic surfactants is utilized in the examples, making the wettability of the solution significantly higher than that of Comparative Examples 1-2, thereby indicating that the coal dust wetting effects of Examples 1-9 are stronger than those of Comparative Examples 1-2.

[0126] The crust hardness test method is as follows:

[0127] Lay 5 g of coal powder flat in a petri dish, take 10 g of the corresponding solution and spray it on the coal sample, and dry it using a vacuum drying oven. The drying temperature is set to 60 °C and the drying duration is 24 h. Use a Shore hardness tester to test the hardness of the coal layer surface, repeat the measurement 3 times at different positions and take the average value. The test results Figure 3 are shown.

[0128] The high hardness of the crust can effectively resist the erosion caused by external forces, which can lead to the loss and lifting of coal powder, and avoid secondary dust. Figure 3 It can be seen that the crust hardness of Examples 1 to 9 is higher than 75HA, which is significantly greater than 64HA and 68HA of Comparative Examples 1 and 2. This is mainly because the cross-linking reaction synergizes the good adhesion of Cassia seed gum and the film-forming property of silk fibroin, thereby enhancing its crusting and adhesion properties. Therefore, the hardness of Examples 1-9 is stronger than that of Comparative Examples 1-2, and it is also confirmed that the dust suppression performance of Examples 1-9 is stronger than that of Comparative Examples 1-2. The dust suppression performance test method is:

[0129] 10g of the corresponding solution was sprayed on a petri dish containing 5g of coal powder and dried in a vacuum oven at 60°C for 12h. 1 The coal samples were subjected to wind erosion at 12 m / s for 5 min and 10 min, and the mass m of the coal samples after wind erosion was recorded. 2 , judge the dust suppression efficiency of the corresponding materials.

[0130] The calculation formula is shown below, and the specific data is shown in Table 1.

[0131]

[0132] Where η is the dust suppression efficiency, m 1 、m 2 are initial mass and mass after wind erosion, respectively.

[0133] Table 1 Dust suppression efficiency test

[0134]

[0135] As can be seen from the above table, after 5 minutes of wind erosion, the dust suppression efficiency of comparative examples 1 and 2 is only about 70%, while the dust suppression efficiency of embodiments 1 to 9 is higher than 98%. After 10 minutes of wind erosion, the dust suppression efficiency of embodiments 1 to 9 is higher than 97%, which is higher than 64.85% and 68.34% of comparative examples 1 and 2, respectively. This proves that the dust suppression effect of the dust suppression material of the embodiment is significantly better than that of the comparative material. By combining the test data results of wettability, crust hardness, and dust suppression efficiency, it can be concluded that the wettability and dust suppression of each embodiment are significantly better than those of the comparative example, and it can be considered that the test results of the embodiment meet basic expectations.

[0136] The strongly solidified and highly wettable dust suppression material prepared by the present invention has good wetting properties and can quickly wet the dust when sprayed on the surface of coal dust, thereby achieving a basic dust control effect. At the same time, combined with its own good crusting and adhesion properties, the coal dust particles can adhere to form large dust particles and settle on the surface of the coal seam to form a solidified layer. Its good crusting hardness makes the solidified layer have good resistance to external interference, and it can still exert good dust suppression performance when facing external forces such as wind erosion, thereby preventing the occurrence of secondary dust.

[0137] Certainly, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the scope of the essence of the present invention shall also fall within the protection scope of the present invention.

Claims

1. A highly solidified and highly wettable dust suppression material for coal mine environment, characterized in that: The raw materials selected are calculated by weight percentage and include: 5-8 parts of cassia seed gum; 2-6 parts of tamarind gum; 2-6 parts of silk fibroin; 1-3 parts of potassium permanganate; 2-6 parts of dodecyl dimethyl amine oxide; 2-6 parts of sodium polyoxyethylene fatty alcohol ether sulfate; 1-3 parts of glycerin; The balance is distilled water.

2. The method for preparing a strong curing and high wettability dust suppression material for coal mine environment according to claim 1, characterized in that: The specific steps are as follows: S1: Add a certain amount of cassia gum and distilled water into a beaker, heat and stir in a constant temperature water bath at 60°C for 1 hour to obtain a cassia gum aqueous solution, add a certain amount of tamarind gum and distilled water into a beaker, heat and stir in a constant temperature water bath at 70°C for 1 hour to obtain a tamarind gum aqueous solution, add a certain amount of silk fibroin and distilled water into a beaker, heat and stir in a constant temperature water bath at 60°C for 1 hour to obtain a silk fibroin aqueous solution; S2: raising the temperature of the magnetic stirring water bath to 70°C, adding a certain amount of potassium permanganate to the cassia seed gum aqueous solution and stirring, and the oxidation time is 20 minutes to obtain an oxidized cassia seed gum solution; S3: adding the tamarind gum aqueous solution and the silk fibroin aqueous solution to the oxidized cassia gum solution, adjusting the solution to be acidic and setting the temperature of the magnetic stirring water bath to 80°C, and reacting with magnetic stirring for 3 hours to obtain a cross-linked product aqueous solution; S4: After adding a certain amount of glacial acetic acid or sodium hydroxide to adjust the pH of the cross-linked product aqueous solution to neutral, add a certain amount of dodecyl dimethylamine oxide, sodium fatty alcohol polyoxyethylene ether sulfate, and glycerol, and stir magnetically at 50°C for 30 minutes to obtain a strongly cured and highly wettable dust suppression material.

3. A highly solidified and highly wettable dust suppression material for coal mine environment as claimed in claim 2, characterized in that: The selected raw materials include, by weight percentage, Cassia seed gum: tamarind seed gum: silk fibroin: potassium permanganate: dodecyl dimethylamine oxide: sodium polyoxyethylene fatty alcohol ether sulfate: glycerol = 4:3:3:2:3:3:

2.

4. The method for preparing a strong curing and high wettability dust suppression material for coal mine environment according to claim 3, characterized in that: During the preparation process, under the condition of 200mL of distilled water, the weights of the raw materials are: Cassia seed gum 0.8g; 5. The method for preparing a strong curing and high wettability dust suppression material for coal mine environment according to claim 4, characterized in that: During the preparation process, cassia seed gum is modified under the oxidation of potassium permanganate to generate oxidized cassia seed gum, and the reaction equation is: (1) Oxidized cassia seed gum undergoes cross-linking reaction with tamarind seed gum and silk fibroin to generate a cross-linked product, and the reaction equation is: (2)

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