Preparation method of waterproof heat-preservation homogeneous plate

Abstract

The invention discloses a preparation method of a waterproof thermal-insulation homogeneous plate, the homogeneous plate comprises the following raw materials by weight: 80-100 parts of Portland cement, 40-50 parts of modified polystyrene, 5-8 parts of modified basalt fiber, 1.5-3 parts of an early strength agent and 5-10 parts of silica fume, when the raw materials are blended and pressed at high temperature and high pressure, pentane in the modified polystyrene is evaporated, and the modified polystyrene and the silica fume are mixed to form the homogeneous plate. The modified polystyrene forms a foaming material, the foaming material, an internal cellulose structure and surrounding basalt fibers all contain a large number of pores, heat transfer can be effectively reduced, meanwhile, the basalt fibers are extremely low in heat conductivity coefficient, the prepared homogeneous plate has a very good heat preservation effect, and after high-temperature and high-pressure heat preservation pressing is conducted, treatment liquid is used for treatment, and the heat preservation effect is good. A hydrophobic membrane is formed by surface gap treatment, glutaraldehyde is added, and an aldehyde group on the glutaraldehyde is grafted with an amino group on a side chain of polysiloxane, so that the compactness of the hydrophobic membrane is improved, the waterproofness of the homogeneous plate is further ensured, and the service life is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of homogeneous board preparation, and in particular to a method for preparing a waterproof and heat-insulating homogeneous board. Background Art

[0002] With the rapid growth of the construction industry, the demand for thermal insulation materials continues to rise. Traditional thermal insulation materials often have problems such as poor stability, high cost, and easy decomposition, which make it difficult to meet the requirements of modern buildings for high efficiency and environmental protection. Homogeneous board is a fireproof thermal insulation material, mainly composed of silicon, calcium minerals and modified additives. In the process of making homogeneous board, composite expanded polystyrene foam particles are also integrated to greatly improve the thermal insulation effect of the homogeneous board. However, the waterproof performance of the homogeneous board is poor. During long-term use, it is affected by moisture and moisture enters the interior of the homogeneous board. The polystyrene foam particles are in contact with moisture for a long time, which causes them to rot, greatly reducing the thermal insulation effect. In severe cases, the thermal insulation effect is even lost, making the homogeneous board completely ineffective. Summary of the invention

[0003] The purpose of the present invention is to provide a method for preparing a waterproof and heat-insulating homogeneous board, which solves the problem that the heat-insulating effect of the homogeneous board will be significantly reduced when used for a long time in a humid environment at present.

[0004] The purpose of the present invention can be achieved through the following technical solutions: A method for preparing a waterproof and heat-insulating homogeneous board specifically comprises the following steps: Step A1: the basalt fiber and the hydrochloric acid solution are mixed uniformly, and stirred for 4-6 hours at a speed of 300-500 r / min and a temperature of 80-85° C., and the filtrate is filtered to remove the filtrate, and then washed with deionized water until neutral to obtain pretreated fiber, and the pretreated fiber is dispersed in ethanol, and stirred at a speed of 120-150 r / min and a temperature of 60-70° C., and 3-mercaptopropyltriethoxysilane and deionized water are added, and the reaction is carried out for 1-1.5 hours to obtain modified basalt fiber; Step A2: octamethylcyclotetrasiloxane, methyltrifluoropropylcyclotrisiloxane, (3-aminopropyl)diethoxyethylsilane, tetramethylammonium hydroxide, tetramethyldivinyldisiloxane, deionized water and dimethyl sulfoxide are mixed, nitrogen is introduced for protection, and the reaction is carried out for 3-5 hours at a speed of 150-200 r / min and a temperature of 75-80° C. to obtain polysiloxane, and the polysiloxane, benzophenone and N,N-dimethylacetamide are mixed to obtain a treatment solution; Step A3: Weigh the following raw materials in parts by weight: 80-100 parts of silicate cement, 40-50 parts of modified polystyrene, 5-8 parts of modified basalt fiber, 1.5-3 parts of early strength agent and 5-10 parts of silica fume, mix the raw materials evenly, keep warm for 30-60 seconds at a steam temperature of 110-130°C and a pressure of 0.3-0.5MPa, cool to 80-85°C, press for 4-6 hours, soak in a treatment liquid, soak for 3-5 minutes, take out until no liquid drips, irradiate with 365nm ultraviolet light for 30-40 seconds, spray glutaraldehyde on the surface, keep warm for 8-10 hours at a temperature of 50-60°C, and obtain a waterproof and heat-insulating homogeneous board.

[0005] Furthermore, the dosage ratio of the basalt fiber and the hydrochloric acid solution in step A1 is 1 g:15 mL, the mass fraction of the hydrochloric acid solution is 4%, and the dosage of 3-mercaptopropyltriethoxysilane is 1% of the mass of the pretreated fiber.

[0006] Further, the amount ratio of octamethylcyclotetrasiloxane, methyltrifluoropropylcyclotrisiloxane, (3-aminopropyl)diethoxyethylsilane, tetramethylammonium hydroxide, tetramethyldivinyldisiloxane and deionized water described in step A2 is 2.5mol:1.3mol:1mol:4mol:6mol:5L, and the mass ratio of polysiloxane, benzophenone and N,N-dimethylacetamide is 1:0.05:8.

[0007] Further, the modified polystyrene is prepared by the following steps: Step B1: N-hydroxyphthalimide, copper chloride, sodium hypochlorite and deionized water are mixed evenly, stirred and added with bamboo cellulose at a speed of 150-200 r / min and a temperature of 70-75°C, reacted for 2-3 hours, filtered to remove the filtrate, and carboxylated bamboo fiber is obtained; carboxylated bamboo fiber, 3-aminopropyltriethoxysilane, dicyclohexylcarbodiimide and toluene are mixed, nitrogen is introduced for protection, and reacted for 2-3 hours at a speed of 200-300 r / min and a temperature of 25-30°C to obtain modified cellulose; Step B2: Modified cellulose, dimethyldiethoxysilane, phenyltriethoxysilane, 3-mercaptopropyltriethoxysilane and ethanol are uniformly mixed, and deionized water and hydrochloric acid are added under stirring at a speed of 120-150 r / min and a temperature of 65-70° C., and the mixture is reacted for 2-3 hours, and then the temperature is raised to 120-130° C. and the reaction is continued for 3-5 hours to obtain a precursor; Step B3: Mix fumaric acid, octadecylamine, dicyclohexylcarbodiimide and toluene, introduce nitrogen protection, and react for 1-1.5 hours at a speed of 200-300 r / min and a temperature of 25-30°C to obtain a modified monomer. Mix styrene, modified monomer, pentane and precursor evenly, stir and add potassium persulfate at a speed of 120-150 r / min and a temperature of 80-85°C, and react for 3-5 hours to obtain modified polystyrene.

[0008] Furthermore, the dosage ratio of N-hydroxyphthalimide, cupric chloride, sodium hypochlorite, deionized water and bamboo cellulose described in step B1 is 3mmol:3mmol:14mmol:30mL:1.5g, and the molar ratio of carboxyl groups on the carboxylated bamboo fiber, 3-aminopropyltriethoxysilane and dicyclohexylcarbodiimide is 1:1:1.1.

[0009] Furthermore, the amount ratio of the modified cellulose, dimethyldiethoxysilane, phenyltriethoxysilane, 3-mercaptopropyltriethoxysilane, ethanol, deionized water and hydrochloric acid described in step B2 is 1g:1mL:2mL:1mL:30mL:3mL:1mL, and the mass fraction of hydrochloric acid is 5%.

[0010] Furthermore, the molar ratio of fumaric acid, octadecylamine and dicyclohexylcarbodiimide in step B3 is 1:2:2.1, the mass ratio of styrene, modified monomer, pentane and precursor is 50-60:10-15:8-10:1-2, and the amount of potassium persulfate is 1% of the total mass of styrene and modified monomer.

[0011] Beneficial effects of the present invention: The waterproof and heat-insulating homogeneous board disclosed by the present invention is prepared by treating basalt fiber as raw material with a hydrochloric acid solution, preparing pretreated fiber, modifying the pretreated fiber with 3-mercaptopropyltriethoxysilane so that mercapto groups are grafted on the surface to prepare modified basalt fiber, opening the ring of octamethylcyclotetrasiloxane and methyltrifluoropropyltrisiloxane and hydrolyzing and condensing with (3-aminopropyl)diethoxyethylsilane, and then end-capping with tetramethyldivinyldisiloxane to prepare polysiloxane, and modifying the polysiloxane. Alkane is dissolved in N,N-dimethylacetamide to prepare a treatment liquid, silicate cement, modified polystyrene, modified basalt fiber, early strength agent and silica fume are mixed and pressed under high temperature and high pressure insulation, and then immersed in the treatment liquid. The treatment liquid enters into the gaps on the surface. After being taken out until no liquid drips, ultraviolet light is irradiated to make the double bonds on the polysiloxane react with the thiol groups on the modified basalt fiber and the thiol groups on the modified polystyrene, and then glutaraldehyde is sprayed on the surface, and insulation treatment is performed to obtain a waterproof and thermal insulation homogeneous board.

[0012] The modified polystyrene is prepared by subjecting bamboo fiber to oxidation treatment as a raw material, so that carboxyl groups are grafted onto bamboo fiber molecules to obtain carboxylated bamboo fiber, reacting carboxylated bamboo fiber with 3-aminopropyltriethoxysilane, so that carboxyl groups on the carboxylated bamboo fiber and amino groups on 3-aminopropyltriethoxysilane undergo a dehydration reaction to obtain modified cellulose, hydrolyzing and condensing the modified fiber, dimethyldiethoxysilane, phenyltriethoxysilane and 3-mercaptopropyltriethoxysilane, coating the surface of the modified cellulose with an organic silicone resin and containing a mercapto group on the outside to obtain a precursor, reacting trans-butadiene diacid with octadecene amine, so that the carboxyl groups on the trans-butadiene diacid and the amino groups on the octadecene amine react to obtain a modified monomer, mixing styrene, the modified monomer, pentane and the precursor, and polymerizing styrene and the modified monomer under the action of potassium persulfate to obtain the modified polystyrene.

[0013] After the raw materials are blended and pressed under high temperature and high pressure, the pentane inside the modified polystyrene evaporates, causing the modified polystyrene to form a foamed material. The internal cellulose structure and the surrounding basalt fibers all contain a large number of pores. The porous structure in these pores is filled with air. Air is a gas with extremely low thermal conductivity, which can effectively reduce heat transfer. At the same time, the thermal conductivity of basalt fiber is extremely low, so that the prepared homogeneous board has a good thermal insulation effect. After high temperature and high pressure thermal pressing, it is treated with a treatment liquid to form a hydrophobic film in the surface gaps. Glutaraldehyde is added, and the aldehyde group on the glutaraldehyde will be grafted with the amino group of the polysiloxane side chain, thereby increasing the density of the hydrophobic film, thereby ensuring the waterproofness of the homogeneous board and increasing its service life. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0015] Embodiment 1, a method for preparing a waterproof and heat-insulating homogeneous board, specifically comprises the following steps: Step A1: the basalt fiber and the hydrochloric acid solution are mixed evenly, and stirred for 4 hours at a speed of 300 r / min and a temperature of 80° C., the filtrate is filtered to remove the filtrate, and then washed with deionized water until neutral to obtain pretreated fiber, and the pretreated fiber is dispersed in ethanol, and stirred at a speed of 120 r / min and a temperature of 60° C., and 3-mercaptopropyltriethoxysilane and deionized water are added to react for 1 hour to obtain modified basalt fiber; Step A2: octamethylcyclotetrasiloxane, methyltrifluoropropylcyclotrisiloxane, (3-aminopropyl)diethoxyethylsilane, tetramethylammonium hydroxide, tetramethyldivinyldisiloxane, deionized water and dimethyl sulfoxide are mixed, nitrogen is introduced for protection, and the reaction is carried out for 3 hours at a speed of 150 r / min and a temperature of 75° C. to obtain polysiloxane, and the polysiloxane, benzophenone and N,N-dimethylacetamide are mixed to obtain a treatment solution; Step A3: Weigh the following raw materials by weight: 80 parts of silicate cement, 40 parts of modified polystyrene, 5 parts of modified basalt fiber, 1.5 parts of early strength agent and 5 parts of silica fume, mix the raw materials evenly, keep warm for 30 seconds at a steam temperature of 110°C and a pressure of 0.3MPa, cool to 80°C, press for 4 hours, soak in a treatment liquid, soak for 3 minutes, take out until no liquid drips, irradiate with 365nm ultraviolet light for 30 seconds, spray glutaraldehyde on the surface, keep warm at a temperature of 50°C for 8 hours, and obtain a waterproof and thermal insulation homogeneous board.

[0016] The dosage ratio of the basalt fiber and the hydrochloric acid solution described in step A1 is 1 g:15 mL, the mass fraction of the hydrochloric acid solution is 4%, and the dosage of 3-mercaptopropyltriethoxysilane is 1% of the mass of the pretreated fiber.

[0017] The amount ratio of octamethylcyclotetrasiloxane, methyltrifluoropropylcyclotrisiloxane, (3-aminopropyl)diethoxyethylsilane, tetramethylammonium hydroxide, tetramethyldivinyldisiloxane and deionized water described in step A2 is 2.5mol:1.3mol:1mol:4mol:6mol:5L, and the mass ratio of polysiloxane, benzophenone and N,N-dimethylacetamide is 1:0.05:8.

[0018] The silicate cement model described in step A3 is PO42.5, the early strength agent is sodium sulfate, and the particle size of silica fume is 0.2 μm.

[0019] The modified polystyrene is prepared by the following steps: Step B1: N-hydroxyphthalimide, copper chloride, sodium hypochlorite and deionized water are mixed evenly, stirred and added with bamboo cellulose at a speed of 150 r / min and a temperature of 70°C, reacted for 2 hours, filtered to remove the filtrate, and carboxylated bamboo fiber is obtained; carboxylated bamboo fiber, 3-aminopropyltriethoxysilane, dicyclohexylcarbodiimide and toluene are mixed, nitrogen is introduced for protection, and reacted for 2 hours at a speed of 200 r / min and a temperature of 25°C to obtain modified cellulose; Step B2: Modified cellulose, dimethyldiethoxysilane, phenyltriethoxysilane, 3-mercaptopropyltriethoxysilane and ethanol were uniformly mixed, and deionized water and hydrochloric acid were added under stirring at a speed of 120 r / min and a temperature of 65° C., and the mixture was reacted for 2 h, and then the temperature was raised to 120° C. and the reaction was continued for 3 h to obtain a precursor; Step B3: Mix fumaric acid, octadecylamine, dicyclohexylcarbodiimide and toluene, introduce nitrogen protection, and react for 1 hour at a speed of 200 r / min and a temperature of 25°C to obtain a modified monomer. Mix styrene, modified monomer, pentane and precursor evenly, stir and add potassium persulfate at a speed of 120 r / min and a temperature of 80°C, and react for 3 hours to obtain modified polystyrene.

[0020] The amount ratio of N-hydroxyphthalimide, cupric chloride, sodium hypochlorite, deionized water and bamboo cellulose described in step B1 is 3mmol:3mmol:14mmol:30mL:1.5g, and the molar ratio of carboxyl groups on carboxylated bamboo fibers, 3-aminopropyltriethoxysilane and dicyclohexylcarbodiimide is 1:1:1.1.

[0021] The amount ratio of modified cellulose, dimethyldiethoxysilane, phenyltriethoxysilane, 3-mercaptopropyltriethoxysilane, ethanol, deionized water and hydrochloric acid described in step B2 is 1g:1mL:2mL:1mL:30mL:3mL:1mL, and the mass fraction of hydrochloric acid is 5%.

[0022] The molar ratio of fumaric acid, octadecylamine and dicyclohexylcarbodiimide described in step B3 is 1:2:2.1, the mass ratio of styrene, modified monomer, pentane and precursor is 50:10:8:1, and the amount of potassium persulfate is 1% of the total mass of styrene and modified monomer.

[0023] Embodiment 2, a method for preparing a waterproof and heat-insulating homogeneous board, specifically comprising the following steps: Step A1: the basalt fiber and the hydrochloric acid solution are mixed evenly, and stirred for 5 hours at a speed of 300 r / min and a temperature of 80° C., the filtrate is filtered to remove the filtrate, and then washed with deionized water until neutral to obtain pretreated fiber, and the pretreated fiber is dispersed in ethanol, and stirred at a speed of 150 r / min and a temperature of 65° C., and 3-mercaptopropyltriethoxysilane and deionized water are added, and the reaction is carried out for 1.5 hours to obtain modified basalt fiber; Step A2: octamethylcyclotetrasiloxane, methyltrifluoropropylcyclotrisiloxane, (3-aminopropyl)diethoxyethylsilane, tetramethylammonium hydroxide, tetramethyldivinyldisiloxane, deionized water and dimethyl sulfoxide are mixed, nitrogen is introduced for protection, and the reaction is carried out for 4 hours at a speed of 150 r / min and a temperature of 80° C. to obtain polysiloxane, and the polysiloxane, benzophenone and N,N-dimethylacetamide are mixed to obtain a treatment solution; Step A3: Weigh the following raw materials by weight: 90 parts of silicate cement, 45 parts of modified polystyrene, 6 parts of modified basalt fiber, 2 parts of early strength agent and 8 parts of silica fume, mix the raw materials evenly, keep warm for 45 seconds at a steam temperature of 120°C and a pressure of 0.4MPa, cool to 85°C, press for 5 hours, soak in a treatment liquid, soak for 4 minutes, take out until no liquid drips, irradiate with 365nm ultraviolet light for 35 seconds, spray glutaraldehyde on the surface, keep warm at a temperature of 55°C for 9 hours, and obtain a waterproof and thermal insulation homogeneous board.

[0024] The dosage ratio of the basalt fiber and the hydrochloric acid solution described in step A1 is 1 g:15 mL, the mass fraction of the hydrochloric acid solution is 4%, and the dosage of 3-mercaptopropyltriethoxysilane is 1% of the mass of the pretreated fiber.

[0025] The amount ratio of octamethylcyclotetrasiloxane, methyltrifluoropropylcyclotrisiloxane, (3-aminopropyl)diethoxyethylsilane, tetramethylammonium hydroxide, tetramethyldivinyldisiloxane and deionized water described in step A2 is 2.5mol:1.3mol:1mol:4mol:6mol:5L, and the mass ratio of polysiloxane, benzophenone and N,N-dimethylacetamide is 1:0.05:8.

[0026] The silicate cement model described in step A3 is PO42.5, the early strength agent is sodium sulfate, and the particle size of silica fume is 0.2 μm.

[0027] The modified polystyrene is prepared by the following steps: Step B1: N-hydroxyphthalimide, copper chloride, sodium hypochlorite and deionized water are mixed evenly, stirred and added with bamboo cellulose at a speed of 150 r / min and a temperature of 75°C, reacted for 3 hours, filtered to remove the filtrate, and carboxylated bamboo fiber is obtained; carboxylated bamboo fiber, 3-aminopropyltriethoxysilane, dicyclohexylcarbodiimide and toluene are mixed, nitrogen is introduced for protection, and reacted for 2 hours at a speed of 200 r / min and a temperature of 30°C to obtain modified cellulose; Step B2: Modified cellulose, dimethyldiethoxysilane, phenyltriethoxysilane, 3-mercaptopropyltriethoxysilane and ethanol were uniformly mixed, and deionized water and hydrochloric acid were added under stirring at a speed of 150 r / min and a temperature of 65° C. After reacting for 3 hours, the temperature was raised to 125° C. and the reaction was continued for 4 hours to obtain a precursor; Step B3: Mix fumaric acid, octadecylamine, dicyclohexylcarbodiimide and toluene, introduce nitrogen protection, and react for 1 hour at a speed of 200 r / min and a temperature of 30°C to obtain a modified monomer. Mix styrene, modified monomer, pentane and precursor evenly, stir and add potassium persulfate at a speed of 150 r / min and a temperature of 80°C, and react for 4 hours to obtain modified polystyrene.

[0028] The amount ratio of N-hydroxyphthalimide, cupric chloride, sodium hypochlorite, deionized water and bamboo cellulose described in step B1 is 3mmol:3mmol:14mmol:30mL:1.5g, and the molar ratio of carboxyl groups on carboxylated bamboo fibers, 3-aminopropyltriethoxysilane and dicyclohexylcarbodiimide is 1:1:1.1.

[0029] The amount ratio of modified cellulose, dimethyldiethoxysilane, phenyltriethoxysilane, 3-mercaptopropyltriethoxysilane, ethanol, deionized water and hydrochloric acid described in step B2 is 1g:1mL:2mL:1mL:30mL:3mL:1mL, and the mass fraction of hydrochloric acid is 5%.

[0030] The molar ratio of fumaric acid, octadecylamine and dicyclohexylcarbodiimide in step B3 is 1:2:2.1, the mass ratio of styrene, modified monomer, pentane and precursor is 55:13:9:1.5, and the amount of potassium persulfate is 1% of the total mass of styrene and modified monomer.

[0031] Embodiment 3, a method for preparing a waterproof and heat-insulating homogeneous board, specifically comprising the following steps: Step A1: the basalt fiber and the hydrochloric acid solution are mixed evenly, and stirred for 6 hours at a speed of 500 r / min and a temperature of 85° C., the filtrate is filtered to remove the filtrate, and then washed with deionized water until neutral to obtain pretreated fiber, and the pretreated fiber is dispersed in ethanol, and stirred at a speed of 150 r / min and a temperature of 70° C., and 3-mercaptopropyltriethoxysilane and deionized water are added, and the reaction is carried out for 1.5 hours to obtain modified basalt fiber; Step A2: octamethylcyclotetrasiloxane, methyltrifluoropropylcyclotrisiloxane, (3-aminopropyl)diethoxyethylsilane, tetramethylammonium hydroxide, tetramethyldivinyldisiloxane, deionized water and dimethyl sulfoxide are mixed, nitrogen is introduced for protection, and the reaction is carried out for 5 hours at a speed of 200 r / min and a temperature of 80° C. to obtain polysiloxane, and the polysiloxane, benzophenone and N,N-dimethylacetamide are mixed to obtain a treatment solution; Step A3: Weigh the following raw materials by weight: 100 parts of silicate cement, 50 parts of modified polystyrene, 8 parts of modified basalt fiber, 3 parts of early strength agent and 10 parts of silica fume, mix the raw materials evenly, keep warm for 60 seconds at a steam temperature of 130°C and a pressure of 0.5MPa, cool to 85°C, press for 6 hours, soak in a treatment liquid, soak for 5 minutes, take out until no liquid drips, irradiate with 365nm ultraviolet light for 40 seconds, spray glutaraldehyde on the surface, keep warm at a temperature of 60°C for 10 hours, and obtain a waterproof and thermal insulation homogeneous board.

[0032] The dosage ratio of the basalt fiber and the hydrochloric acid solution described in step A1 is 1 g:15 mL, the mass fraction of the hydrochloric acid solution is 4%, and the dosage of 3-mercaptopropyltriethoxysilane is 1% of the mass of the pretreated fiber.

[0033] The amount ratio of octamethylcyclotetrasiloxane, methyltrifluoropropylcyclotrisiloxane, (3-aminopropyl)diethoxyethylsilane, tetramethylammonium hydroxide, tetramethyldivinyldisiloxane and deionized water described in step A2 is 2.5mol:1.3mol:1mol:4mol:6mol:5L, and the mass ratio of polysiloxane, benzophenone and N,N-dimethylacetamide is 1:0.05:8.

[0034] The silicate cement model described in step A3 is PO42.5, the early strength agent is calcium formate, and the particle size of silica fume is 0.2 μm.

[0035] The modified polystyrene is prepared by the following steps: Step B1: N-hydroxyphthalimide, copper chloride, sodium hypochlorite and deionized water are mixed evenly, stirred and added with bamboo cellulose at a speed of 200 r / min and a temperature of 75°C, reacted for 3 hours, filtered to remove the filtrate, and carboxylated bamboo fiber is obtained; carboxylated bamboo fiber, 3-aminopropyltriethoxysilane, dicyclohexylcarbodiimide and toluene are mixed, nitrogen is introduced for protection, and reacted for 3 hours at a speed of 300 r / min and a temperature of 30°C to obtain modified cellulose; Step B2: Modified cellulose, dimethyldiethoxysilane, phenyltriethoxysilane, 3-mercaptopropyltriethoxysilane and ethanol were uniformly mixed, and deionized water and hydrochloric acid were added under stirring at a speed of 150 r / min and a temperature of 70° C., and the mixture was reacted for 3 h, and then the temperature was raised to 130° C. and the reaction was continued for 5 h to obtain a precursor; Step B3: Mix fumaric acid, octadecylamine, dicyclohexylcarbodiimide and toluene, introduce nitrogen protection, and react for 1.5 hours at a speed of 300 r / min and a temperature of 30°C to obtain a modified monomer. Mix styrene, modified monomer, pentane and precursor evenly, stir and add potassium persulfate at a speed of 150 r / min and a temperature of 85°C, and react for 5 hours to obtain modified polystyrene.

[0036] The amount ratio of N-hydroxyphthalimide, cupric chloride, sodium hypochlorite, deionized water and bamboo cellulose described in step B1 is 3mmol:3mmol:14mmol:30mL:1.5g, and the molar ratio of carboxyl groups on carboxylated bamboo fibers, 3-aminopropyltriethoxysilane and dicyclohexylcarbodiimide is 1:1:1.1.

[0037] The amount ratio of modified cellulose, dimethyldiethoxysilane, phenyltriethoxysilane, 3-mercaptopropyltriethoxysilane, ethanol, deionized water and hydrochloric acid described in step B2 is 1g:1mL:2mL:1mL:30mL:3mL:1mL, and the mass fraction of hydrochloric acid is 5%.

[0038] The molar ratio of fumaric acid, octadecylamine and dicyclohexylcarbodiimide described in step B3 is 1:2:2.1, the mass ratio of styrene, modified monomer, pentane and precursor is 60:15:10:2, and the amount of potassium persulfate is 1% of the total mass of styrene and modified monomer.

[0039] Comparative Example 1: Compared with Example 1, glutaraldehyde was not sprayed in this comparative example, and the remaining steps were the same.

[0040] Comparative Example 2: Compared with Example 1, this comparative example does not use the treatment liquid for immersion, and the other steps are the same.

[0041] Comparative Example 3: Compared with Example 1, this comparative example uses basalt fiber instead of modified basalt fiber, and the other steps are the same.

[0042] Comparative Example 4: Compared with Example 1, bamboo fiber is used to replace the precursor, and the other steps are the same.

[0043] Comparative Example 5: Compared with Example 1, no modified monomer was added to this comparative example, and the remaining steps were the same.

[0044] The thermal conductivity of the homogeneous plates prepared in Examples 1-3 and Comparative Examples 1-5 was tested according to the standard of GB / T10294-2008, with a sample thickness of 20 mm. The volume water absorption was tested according to the standard of GB / T5486-2008, and the test results are shown in Table 1 below.

[0045] Table 1 Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Thermal conductivity W / (m·k) 0.017 0.023 0.019 0.028 0.036 0.019 0.024 0.017 Volume water absorption% 3.1 3.8 3.3 8.4 13.5 5.1 6.4 5.8 It can be seen from Table 1 above that the present invention has a very good waterproof and heat-insulating effect.

[0046] The above contents are merely examples and explanations of the concept of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A method for preparing a waterproof and heat-insulating homogeneous board, characterized in that: The specific steps include: Step A1: After mixing and stirring basalt fiber and hydrochloric acid solution, filtering to remove filtrate, and then washing with deionized water until neutral to obtain pretreated fiber, the pretreated fiber is dispersed in ethanol, stirred and 3-mercaptopropyltriethoxysilane and deionized water are added to react to obtain modified basalt fiber; Step A2: octamethylcyclotetrasiloxane, methyltrifluoropropylcyclotrisiloxane, (3-aminopropyl)diethoxyethylsilane, tetramethylammonium hydroxide, tetramethyldivinyldisiloxane, deionized water and dimethyl sulfoxide are mixed, nitrogen is introduced for protection, and a reaction is carried out to obtain polysiloxane, and the polysiloxane, benzophenone and N,N-dimethylacetamide are mixed to obtain a treatment solution; Step A3: Weigh the following raw materials in parts by weight: 80-100 parts of silicate cement, 40-50 parts of modified polystyrene, 5-8 parts of modified basalt fiber, 1.5-3 parts of early strength agent and 5-10 parts of silica fume, mix the raw materials evenly, press them under high temperature and high pressure insulation, immerse them in a treatment liquid, immerse them until no liquid drips, irradiate them with 365nm ultraviolet light, spray glutaraldehyde on the surface, and perform insulation treatment to obtain a waterproof and heat-insulating homogeneous board.

2. The method for preparing a waterproof and heat-insulating homogeneous board according to claim 1, characterized in that: The dosage ratio of the basalt fiber and the hydrochloric acid solution described in step A1 is 1 g:15 mL, and the dosage of 3-mercaptopropyltriethoxysilane is 1% of the mass of the pretreated fiber.

3. The method for preparing a waterproof and heat-insulating homogeneous board according to claim 1, characterized in that: The amount ratio of octamethylcyclotetrasiloxane, methyltrifluoropropylcyclotrisiloxane, (3-aminopropyl)diethoxyethylsilane, tetramethylammonium hydroxide, tetramethyldivinyldisiloxane and deionized water described in step A2 is 2.5mol:1.3mol:1mol:4mol:6mol:5L, and the mass ratio of polysiloxane, benzophenone and N,N-dimethylacetamide is 1:0.05:

8.

4. The method for preparing a waterproof and heat-insulating homogeneous board according to claim 1, characterized in that: The modified polystyrene is prepared by the following steps: Step B1: N-hydroxyphthalimide, copper chloride, sodium hypochlorite and deionized water are mixed and stirred and added to bamboo cellulose to react, and the filtrate is filtered to remove the filtrate to obtain carboxylated bamboo fiber; carboxylated bamboo fiber, 3-aminopropyltriethoxysilane, dicyclohexylcarbodiimide and toluene are mixed, nitrogen is introduced for protection, and the reaction is carried out to obtain modified cellulose; Step B2: mixing and stirring the modified cellulose, dimethyldiethoxysilane, phenyltriethoxysilane, 3-mercaptopropyltriethoxysilane and ethanol, and adding deionized water and hydrochloric acid to react to obtain a precursor; Step B3: Mix fumaric acid, octadecylamine, dicyclohexylcarbodiimide and toluene, introduce nitrogen protection, and react to obtain a modified monomer; mix styrene, the modified monomer, pentane and a precursor to react to obtain a modified polystyrene.

5. The method for preparing a waterproof and heat-insulating homogeneous board according to claim 4, characterized in that: The amount ratio of N-hydroxyphthalimide, cupric chloride, sodium hypochlorite, deionized water and bamboo cellulose described in step B1 is 3mmol:3mmol:14mmol:30mL:1.5g, and the molar ratio of carboxyl groups on carboxylated bamboo fibers, 3-aminopropyltriethoxysilane and dicyclohexylcarbodiimide is 1:1:1.

1.

6. The method for preparing a waterproof and heat-insulating homogeneous board according to claim 4, characterized in that: The amount ratio of the modified cellulose, dimethyldiethoxysilane, phenyltriethoxysilane, 3-mercaptopropyltriethoxysilane, ethanol, deionized water and hydrochloric acid described in step B2 is 1g:1mL:2mL:1mL:30mL:3mL:1mL.

7. The method for preparing a waterproof and heat-insulating homogeneous board according to claim 4, characterized in that: The molar ratio of fumaric acid, octadecylamine and dicyclohexylcarbodiimide in step B3 is 1:2:2.1, and the mass ratio of styrene, modified monomer, pentane and precursor is 50-60:10-15:8-10:1-2.