CN108558341B - Preparation method and application of modified nano heat-insulating building material - Google Patents
Preparation method and application of modified nano heat-insulating building material Download PDFInfo
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- CN108558341B CN108558341B CN201810479309.1A CN201810479309A CN108558341B CN 108558341 B CN108558341 B CN 108558341B CN 201810479309 A CN201810479309 A CN 201810479309A CN 108558341 B CN108558341 B CN 108558341B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00008—Obtaining or using nanotechnology related materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a preparation method of a modified nano heat-insulating building material, which comprises the following steps: weighing 10-30 parts of nano silica powder according to parts by weight for modification treatment, mixing with 8-20 parts of gypsum, adding water for ultrasonic treatment, then sequentially adding 30-50 parts of filler, 2-10 parts of bisphenol S epoxy resin, 0.3-1.5 parts of low molecular weight polyamide resin, 0.3-1.5 parts of sodium sulfate and 2-15 parts of hydroxyethyl cellulose, mechanically stirring to obtain a mixture, casting the mixture in a forming die at high temperature, and cooling to room temperature to obtain the modified nano heat-insulating building material. The production process is simple and easy to implement, the equipment investment is low, and the modified nano heat-insulating building material prepared by the method has a good heat-insulating effect, excellent fireproof performance and wide market prospect.
Description
Technical Field
The invention relates to the field of building materials, in particular to a preparation method and application of a modified nano heat-insulating building material.
Background
With the continuous development of social economy and science and technology, the living standard of people is rapidly improved, the requirements on building materials are more outstanding, the novel building materials are various in variety and form, and the development and improvement of the innovation trend of modern building technology are led. The novel building material integrates economy, practicability, fashion and environmental protection, and fully meets the aesthetic requirements of architectural decoration of the masses. With the continuous development of the times, novel building materials are produced and are technically innovated, and the main novel building materials comprise novel wall materials, heat-insulating materials, waterproof sealing materials, decorative materials and the like. The heat-insulating material industry in China has been made to adopt heat-insulating building materials such as expanded perlite, mineral wool, glass wool, foam plastics, refractory fibers and the like from singleness to diversification and low-to-high quality through more than 30 years of effort, particularly through the high-speed development in recent years. The building material needs to have better heat insulation performance and fireproof performance, and the heat insulation performance and the fireproof performance of the building material can be improved by adopting the nano-grade material for improvement, but the nano-grade material in the conventional building material is less in use, and meanwhile, the composite effect is influenced by the reason that the nano-grade material is poorer in compatibility when being compounded with other materials.
Disclosure of Invention
The invention aims to provide a preparation method and application of a modified nano heat-insulating building material, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a preparation method of a modified nanometer thermal insulation building material is characterized by comprising the following steps: :
1) adding 70-90 parts of sodium dodecyl benzene sulfonate and 15-30 parts of polyvinyl alcohol into a reactor according to the parts by weight, stirring for 10-30min, adding 200 parts of 150-one-wall water, continuously stirring, fully and uniformly mixing to form a white emulsion, adding 10-30 parts of nano-silicon micro-powder, performing ultrasonic dispersion for 10-40min, then adding 30-40 parts of aniline and 200 parts of 150-one-wall hydrochloric acid solution, after stirring and dispersing, slowly dropwise adding an ammonium persulfate aqueous solution, keeping the system temperature at 0-10 ℃, continuously stirring for 30-50min, stopping the reaction after 36h, adding acetone for demulsification, filtering, repeatedly washing a reaction product with water until a filtrate is basically colorless, performing vacuum drying, grinding, and sieving by a 400-mesh sieve to obtain modified nano-silicon micro-powder;
2) weighing 8-20 parts of gypsum according to the weight parts, mixing with the modified nano-silica powder obtained in the step 1), adding into 40-80 parts of water, then sending into an ultrasonic processor for ultrasonic treatment, then respectively adding 30-50 parts of filler, 2-10 parts of bisphenol S epoxy resin, 0.3-1.5 parts of low molecular weight polyamide resin, 0.3-1.5 parts of sodium sulfate and 2-15 parts of hydroxyethyl cellulose in sequence, and mechanically stirring to obtain a mixture;
3) casting the mixture obtained in the step 2) in a forming die at a high temperature, and cooling to room temperature to obtain the modified nano heat-insulating building material.
As a further scheme of the invention: in the step 1), the ultrasonic frequency of the ultrasonic dispersion is 30-50 kHz.
As a still further scheme of the invention: in the step 1), the ammonium persulfate is dropwise added according to the following formula: the mass ratio of aniline is 2: 1, was added dropwise.
As a still further scheme of the invention: in the step 1), the vacuum drying is carried out for 24 hours at the temperature of 30-60 ℃.
As a still further scheme of the invention: in the step 2), the ultrasonic treatment time is 10-30 min.
As a still further scheme of the invention: in the step 2), the ultrasonic frequency of the ultrasonic treatment is 30-60 kHz.
As a still further scheme of the invention: in the step 2), the filler is formed by mixing the ultralight nano expanded beads, perlite, sodium silicate and butadiene acrylonitrile rubber particles according to the weight ratio of 5:1:1: 2.
As a still further scheme of the invention: in the step 3), the pouring temperature of the high-temperature pouring is 110-150 ℃.
The modified nano heat-insulating building material prepared by the preparation method of the modified nano heat-insulating building material is applied to building materials.
Compared with the prior art, the invention has the beneficial effects that:
the production process is simple and easy to implement, the equipment investment is low, the composite effect of the nano-grade material and other materials is improved through the synergistic effect of modification treatment and ultrasonic dispersion, and the modified nano-insulation building material prepared by the method has the advantages of good insulation effect, excellent fireproof performance and wide market prospect.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to specific embodiments.
Example 1
1) Adding 70 parts by weight of sodium dodecyl benzene sulfonate and 15 parts by weight of polyvinyl alcohol into a reactor, stirring for 15min, adding 150 parts by weight of water, continuing stirring, fully and uniformly mixing to form white emulsion, adding 10 parts by weight of nano silicon micropowder, ultrasonically dispersing for 25min at the ultrasonic frequency of 40kHz, then adding 30 parts by weight of aniline and 150 parts by weight of hydrochloric acid solution, stirring and dispersing, and adding ammonium persulfate: the mass ratio of aniline is 2: 1, slowly dropwise adding an ammonium persulfate aqueous solution according to the proportion of 1, keeping the temperature of the system at 4 ℃, continuously stirring for 40min, stopping the reaction after 36h, adding acetone for demulsification, filtering, repeatedly washing the reaction product with water until the filtrate is basically colorless, vacuum-drying for 24h at 50 ℃, grinding, and sieving by a 400-mesh sieve to obtain the modified nano-silicon micro-powder.
2) Weighing 14 parts by weight of gypsum and the modified nano-silica powder obtained in the step 1), mixing the gypsum and the modified nano-silica powder with 60 parts by weight of water, then sending the mixture into an ultrasonic processor to perform ultrasonic treatment for 20min at the ultrasonic frequency of 50kHz, then respectively and sequentially adding 40 parts of filler, 6 parts of bisphenol S epoxy resin, 0.8 part of low molecular weight polyamide resin, 0.7 part of sodium sulfate and 8 parts of hydroxyethyl cellulose, and mechanically stirring to obtain a mixture; the filler is formed by mixing ultralight nano expanded beads, perlite, sodium silicate and butadiene-acrylonitrile rubber particles according to the weight ratio of 5:1:1: 2.
3) Casting the mixture obtained in the step 2) in a forming mould at a high temperature of 140 ℃, and cooling to room temperature to obtain the modified nano heat-insulating building material.
Example 2
1) Adding 90 parts by weight of sodium dodecyl benzene sulfonate and 30 parts by weight of polyvinyl alcohol into a reactor, stirring for 15min, adding 200 parts by weight of water, continuing stirring, fully and uniformly mixing to form white emulsion, adding 30 parts by weight of nano silicon micropowder, ultrasonically dispersing for 25min at the ultrasonic frequency of 40kHz, then adding 40 parts by weight of aniline and 200 parts by weight of hydrochloric acid solution, stirring and dispersing, and adding ammonium persulfate: the mass ratio of aniline is 2: 1, slowly dropwise adding an ammonium persulfate aqueous solution according to the proportion of 1, keeping the temperature of the system at 4 ℃, continuously stirring for 40min, stopping the reaction after 36h, adding acetone for demulsification, filtering, repeatedly washing the reaction product with water until the filtrate is basically colorless, vacuum-drying for 24h at 50 ℃, grinding, and sieving by a 400-mesh sieve to obtain the modified nano-silicon micro-powder.
2) Weighing 14 parts by weight of gypsum and the modified nano-silica powder obtained in the step 1), mixing the gypsum and the modified nano-silica powder with 60 parts by weight of water, then sending the mixture into an ultrasonic processor to perform ultrasonic treatment for 20min at the ultrasonic frequency of 50kHz, then respectively and sequentially adding 40 parts of filler, 6 parts of bisphenol S epoxy resin, 0.8 part of low molecular weight polyamide resin, 0.7 part of sodium sulfate and 8 parts of hydroxyethyl cellulose, and mechanically stirring to obtain a mixture; the filler is formed by mixing ultralight nano expanded beads, perlite, sodium silicate and butadiene-acrylonitrile rubber particles according to the weight ratio of 5:1:1: 2.
3) Casting the mixture obtained in the step 2) in a forming mould at a high temperature of 140 ℃, and cooling to room temperature to obtain the modified nano heat-insulating building material.
Example 3
1) Adding 80 parts by weight of sodium dodecyl benzene sulfonate and 20 parts by weight of polyvinyl alcohol into a reactor, stirring for 15min, adding 180 parts by weight of water, continuing stirring, fully and uniformly mixing to form white emulsion, adding 20 parts by weight of nano-silica powder, performing ultrasonic dispersion for 25min at the ultrasonic frequency of 40kHz, then adding 35 parts by weight of aniline and 175 parts by weight of hydrochloric acid solution, and stirring and dispersing according to the weight ratio of ammonium persulfate: the mass ratio of aniline is 2: 1, slowly dropwise adding an ammonium persulfate aqueous solution according to the proportion of 1, keeping the temperature of the system at 4 ℃, continuously stirring for 40min, stopping the reaction after 36h, adding acetone for demulsification, filtering, repeatedly washing the reaction product with water until the filtrate is basically colorless, vacuum-drying for 24h at 50 ℃, grinding, and sieving by a 400-mesh sieve to obtain the modified nano-silicon micro-powder.
2) Weighing 14 parts by weight of gypsum and the modified nano-silica powder obtained in the step 1), mixing the gypsum and the modified nano-silica powder with 60 parts by weight of water, then sending the mixture into an ultrasonic processor to perform ultrasonic treatment for 20min at the ultrasonic frequency of 50kHz, then respectively and sequentially adding 40 parts of filler, 6 parts of bisphenol S epoxy resin, 0.8 part of low molecular weight polyamide resin, 0.7 part of sodium sulfate and 8 parts of hydroxyethyl cellulose, and mechanically stirring to obtain a mixture; the filler is formed by mixing ultralight nano expanded beads, perlite, sodium silicate and butadiene-acrylonitrile rubber particles according to the weight ratio of 5:1:1: 2.
3) Casting the mixture obtained in the step 2) in a forming mould at a high temperature of 140 ℃, and cooling to room temperature to obtain the modified nano heat-insulating building material.
Example 4
1) Adding 80 parts by weight of sodium dodecyl benzene sulfonate and 20 parts by weight of polyvinyl alcohol into a reactor, stirring for 15min, adding 180 parts by weight of water, continuing stirring, fully and uniformly mixing to form white emulsion, adding 20 parts by weight of nano-silica powder, performing ultrasonic dispersion for 25min at the ultrasonic frequency of 40kHz, then adding 35 parts by weight of aniline and 175 parts by weight of hydrochloric acid solution, and stirring and dispersing according to the weight ratio of ammonium persulfate: the mass ratio of aniline is 2: 1, slowly dropwise adding an ammonium persulfate aqueous solution according to the proportion of 1, keeping the temperature of the system at 4 ℃, continuously stirring for 40min, stopping the reaction after 36h, adding acetone for demulsification, filtering, repeatedly washing the reaction product with water until the filtrate is basically colorless, vacuum-drying for 24h at 50 ℃, grinding, and sieving by a 400-mesh sieve to obtain the modified nano-silicon micro-powder.
2) Weighing 8 parts by weight of gypsum and the modified nano-silica powder obtained in the step 1), mixing and adding the gypsum and the modified nano-silica powder into 40 parts by weight of water, then sending the mixture into an ultrasonic processor, carrying out ultrasonic treatment for 20min at the ultrasonic frequency of 50kHz, then respectively and sequentially adding 30 parts of filler, 2 parts of bisphenol S type epoxy resin, 0.3 part of low molecular weight polyamide resin, 0.3 part of sodium sulfate and 2 parts of hydroxyethyl cellulose, and mechanically stirring to obtain a mixture; the filler is formed by mixing ultralight nano expanded beads, perlite, sodium silicate and butadiene-acrylonitrile rubber particles according to the weight ratio of 5:1:1: 2.
3) Casting the mixture obtained in the step 2) in a forming mould at a high temperature of 140 ℃, and cooling to room temperature to obtain the modified nano heat-insulating building material.
Example 5
1) Adding 80 parts by weight of sodium dodecyl benzene sulfonate and 20 parts by weight of polyvinyl alcohol into a reactor, stirring for 15min, adding 180 parts by weight of water, continuing stirring, fully and uniformly mixing to form white emulsion, adding 20 parts by weight of nano-silica powder, performing ultrasonic dispersion for 25min at the ultrasonic frequency of 40kHz, then adding 35 parts by weight of aniline and 175 parts by weight of hydrochloric acid solution, and stirring and dispersing according to the weight ratio of ammonium persulfate: the mass ratio of aniline is 2: 1, slowly dropwise adding an ammonium persulfate aqueous solution according to the proportion of 1, keeping the temperature of the system at 4 ℃, continuously stirring for 40min, stopping the reaction after 36h, adding acetone for demulsification, filtering, repeatedly washing the reaction product with water until the filtrate is basically colorless, vacuum-drying for 24h at 50 ℃, grinding, and sieving by a 400-mesh sieve to obtain the modified nano-silicon micro-powder.
2) Weighing 20 parts by weight of gypsum and the modified nano-silica powder obtained in the step 1), mixing the gypsum and the modified nano-silica powder with 80 parts by weight of water, then sending the mixture into an ultrasonic processor to carry out ultrasonic treatment for 20min at the ultrasonic frequency of 50kHz, then respectively adding 50 parts of filler, 10 parts of bisphenol S epoxy resin, 1.5 parts of low molecular weight polyamide resin, 1.5 parts of sodium sulfate and 15 parts of hydroxyethyl cellulose in sequence, and mechanically stirring to obtain a mixture; the filler is formed by mixing ultralight nano expanded beads, perlite, sodium silicate and butadiene-acrylonitrile rubber particles according to the weight ratio of 5:1:1: 2.
3) Casting the mixture obtained in the step 2) in a forming mould at a high temperature of 140 ℃, and cooling to room temperature to obtain the modified nano heat-insulating building material.
Comparative example 1
1) Weighing 14 parts of gypsum and 20 parts of nano-silica micro powder according to parts by weight, mixing and adding into 60 parts of water, then sending into an ultrasonic processor for ultrasonic treatment for 20min at the ultrasonic frequency of 50kHz, then respectively and sequentially adding 40 parts of filler, 6 parts of bisphenol S epoxy resin, 0.8 part of low molecular weight polyamide resin, 0.7 part of sodium sulfate and 8 parts of hydroxyethyl cellulose, and mechanically stirring to obtain a mixture; the filler is formed by mixing ultralight nano expanded beads, perlite, sodium silicate and butadiene-acrylonitrile rubber particles according to the weight ratio of 5:1:1: 2.
2) Casting the mixture obtained in the step 1) in a forming mould at a high temperature of 140 ℃ and cooling to room temperature to obtain the nano heat-insulating building material.
Comparative example 2
1) Adding 80 parts by weight of sodium dodecyl benzene sulfonate and 20 parts by weight of polyvinyl alcohol into a reactor, stirring for 15min, adding 180 parts by weight of water, continuing stirring, fully and uniformly mixing to form white emulsion, adding 20 parts by weight of nano-silica powder, performing ultrasonic dispersion for 25min at the ultrasonic frequency of 40kHz, then adding 35 parts by weight of aniline and 175 parts by weight of hydrochloric acid solution, and stirring and dispersing according to the weight ratio of ammonium persulfate: the mass ratio of aniline is 2: 1, slowly dropwise adding an ammonium persulfate aqueous solution according to the proportion of 1, keeping the temperature of the system at 4 ℃, continuously stirring for 40min, stopping the reaction after 36h, adding acetone for demulsification, filtering, repeatedly washing the reaction product with water until the filtrate is basically colorless, vacuum-drying for 24h at 50 ℃, grinding, and sieving by a 400-mesh sieve to obtain the modified nano-silicon micro-powder.
2) Weighing 14 parts by weight of gypsum and the modified nano-silica powder obtained in the step 1), mixing and adding into 60 parts of water, then mechanically stirring for 20min, then sequentially adding 40 parts of filler, 6 parts of bisphenol S epoxy resin, 0.8 part of low molecular weight polyamide resin, 0.7 part of sodium sulfate and 8 parts of hydroxyethyl cellulose, and mechanically stirring to obtain a mixture; the filler is formed by mixing ultralight nano expanded beads, perlite, sodium silicate and butadiene-acrylonitrile rubber particles according to the weight ratio of 5:1:1: 2.
3) Casting the mixture obtained in the step 2) in a forming mould at a high temperature of 140 ℃, and cooling to room temperature to obtain the modified nano heat-insulating building material.
Comparative example 3
1) Weighing 14 parts of gypsum and 20 parts of nano-silica micropowder according to the parts by weight, mixing and adding into 60 parts of water, then mechanically stirring for 20min, then respectively adding 40 parts of filler, 6 parts of bisphenol S epoxy resin, 0.8 part of low molecular weight polyamide resin, 0.7 part of sodium sulfate and 8 parts of hydroxyethyl cellulose in sequence, and mechanically stirring to obtain a mixture; the filler is formed by mixing ultralight nano expanded beads, perlite, sodium silicate and butadiene-acrylonitrile rubber particles according to the weight ratio of 5:1:1: 2.
2) Casting the mixture obtained in the step 1) in a forming mould at a high temperature of 140 ℃ and cooling to room temperature to obtain the nano heat-insulating building material.
The fire-proof grade and the thermal conductivity of the modified nano thermal insulation building material prepared by the method are measured, the fire-proof grade test standard is GB/T5464-1999, and the results of the fire-proof grade and the thermal conductivity of examples 1-5 and comparative examples 1-3 are shown in Table 1.
According to the comparison of the data of the embodiment 3 and the data of the comparative example 1, the added nanometer silica powder is modified, so that the compatibility of the nanometer silica powder and other materials can be effectively improved, the composite effect is further improved, and the nanometer heat-insulating building material has excellent heat-insulating effect and good fireproof performance; according to the comparison of the data of the example 3 and the comparative example 2, the composite effect of the nanometer silicon powder and other materials can be further improved through the ultrasonic dispersion.
In addition, according to the comparison of the data of the embodiment 3 and the comparative examples 1 to 3, the thermal insulation building material is improved by adopting the nano-scale material, and meanwhile, the composite effect of the nano-scale material and other materials is improved through the synergistic effect of modification treatment and ultrasonic dispersion, so that the thermal conductivity coefficient of the thermal insulation building material can be effectively reduced, the thermal insulation effect is further improved, and the fireproof performance of the thermal insulation building material is improved.
Table 1 table of performance test results
| Group of | Fire rating | Thermal conductivity W/(m.K) |
| Example 1 | A1 | 0.042 |
| Example 2 | A1 | 0.039 |
| Example 3 | A1 | 0.035 |
| Example 4 | A1 | 0.040 |
| Example 5 | A1 | 0.038 |
| Comparative example 1 | A2 | 0.061 |
| Comparative example 2 | A2 | 0.048 |
| Comparative example 3 | A2 | 0.067 |
The production process is simple and easy to implement, the equipment investment is low, the composite effect of the nano-grade material and other materials is improved through the synergistic effect of modification treatment and ultrasonic dispersion, and the modified nano-insulation building material prepared by the method has the advantages of good insulation effect, excellent fireproof performance and wide market prospect.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (1)
1. A preparation method of a modified nanometer thermal insulation building material is characterized by comprising the following steps: 1) adding 70-90 parts of sodium dodecyl benzene sulfonate and 15-30 parts of polyvinyl alcohol into a reactor according to the parts by weight, stirring for 10-30min, adding 150-200 parts of water, continuously stirring, fully and uniformly mixing to form a white emulsion, adding 10-30 parts of nano silicon micro powder, performing ultrasonic dispersion for 10-40min, wherein the ultrasonic frequency of the ultrasonic dispersion is 30-50kHz, then adding 30-40 parts of aniline and 150-200 parts of hydrochloric acid solution, stirring and dispersing, slowly dropwise adding an ammonium persulfate aqueous solution, keeping the system temperature at 0-10 ℃, continuously stirring for 30-50min, stopping the reaction after 36h, adding acetone for demulsification, filtering, repeatedly washing the reaction product with water until the filtrate is basically colorless, performing vacuum drying, grinding, and sieving by a 400-mesh sieve to obtain the modified nano silicon micro powder; in the step 1), the ammonium persulfate is dropwise added according to the following formula: the mass ratio of aniline is 2: 1, and the vacuum drying is carried out for 24 hours at the temperature of 30-60 ℃; 2) weighing 8-20 parts by weight of gypsum and the modified nano-silica powder obtained in the step 1), mixing the gypsum and the modified nano-silica powder, adding the mixture into 40-80 parts of water, then sending the mixture into an ultrasonic processor for ultrasonic treatment, wherein the ultrasonic treatment time is 10-30min, the ultrasonic frequency of the ultrasonic treatment is 30-60kHz, then sequentially adding 30-50 parts of a filler, 2-10 parts of bisphenol S type epoxy resin, 0.3-1.5 parts of low molecular weight polyamide resin, 0.3-1.5 parts of sodium sulfate and 2-15 parts of hydroxyethyl cellulose, and mechanically stirring to obtain a mixture, wherein the filler is formed by mixing ultra-light nano expanded beads, perlite, sodium silicate and nitrile rubber particles according to the weight ratio of 5:1:1: 2; 3) and (3) casting the mixture obtained in the step 2) in a forming mould at a high temperature, wherein the casting temperature of the high-temperature casting is 110-150 ℃, and cooling to room temperature to obtain the modified nano heat-insulating building material.
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| CN103011721A (en) * | 2012-11-16 | 2013-04-03 | 合肥神舟建筑工程有限公司 | Modified nano-kieselguhr inorganic thermal-insulation mortar coated with plant ash and preparation method thereof |
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