CN112142414A - Preparation method of adhesive polystyrene particle thermal insulation mortar - Google Patents
Preparation method of adhesive polystyrene particle thermal insulation mortar Download PDFInfo
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- CN112142414A CN112142414A CN202011114891.5A CN202011114891A CN112142414A CN 112142414 A CN112142414 A CN 112142414A CN 202011114891 A CN202011114891 A CN 202011114891A CN 112142414 A CN112142414 A CN 112142414A
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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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland 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
- 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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- 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
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention belongs to the technical field of building energy conservation, and discloses a preparation method of a rubber powder polyphenyl particle thermal insulation mortar. The preparation method comprises the following steps: (1) crushing plant straws, putting the crushed plant straws into lime slurry, and adding a citric acid aqueous solution and a phosphate solution to prepare modified plant fibers; (2) soaking the rubber powder in a bisamino silane coupling agent aqueous solution, mixing with styrene-butadiene emulsion and EVA emulsion, and cooling after heat treatment to obtain modified rubber powder; (3) mixing the graphene oxide aqueous solution and the polyphenyl particles to obtain modified polyphenyl particles; (4) mixing and stirring ordinary portland cement and a silane coupling agent, adding starch sulfate grafted acrylic acid, modified plant fiber, modified rubber powder and modified polyphenyl particles, adding fly ash, silica fume and water, and stirring and mixing to obtain the glue powder polyphenyl particle thermal insulation mortar. The preparation method modifies plant straws, rubber powder, modified polyphenyl granules and ordinary portland cement, so that the material strength and the heat preservation performance are ideal.
Description
Technical Field
The invention relates to the technical field of building energy conservation, in particular to a preparation method of a rubber powder polyphenyl particle thermal insulation mortar.
Background
The external wall heat insulation is a key point in the field of building energy conservation, the external wall heat insulation material is divided into inorganic materials and organic materials, and at present, most heat insulation materials are formed by mixing the organic materials and the inorganic materials and integrating the advantages of the organic materials and the inorganic materials. The glue powder polyphenyl granule is an external wall heat-insulating material mixed by inorganic materials and organic materials, is formed by mixing and stirring glue powder, polyphenyl granule light materials and cement, can be used by adding water on site (namely glue powder polyphenyl granule heat-insulating mortar), and has better heat-insulating property and simple construction.
The glue powder polyphenyl particle thermal insulation mortar usually contains portland cement, sierozem powder, polyphenyl particles, lignin, polypropylene short fibers, silica fume, composite resin glue powder and the like, but the formula of the material is not unique. The polyphenyl granules belong to organic polymer materials, are incompatible with inorganic gelled materials or some additives in the mixing process due to the difference of properties, have unsatisfactory bonding strength, poor construction performance of heat-insulating materials and poor adhesion with a base layer, and are easy to cause the problems of hollowing, falling, cracking and the like when applied to outer walls. In order to further improve the mechanical property and the thermal insulation property of the rubber powder polyphenyl granule thermal insulation mortar, a plurality of attempts are made by the technical personnel in the field to prepare the rubber powder polyphenyl granule thermal insulation mortar. For example, Chinese patent CN107445541B discloses a method for preparing anti-crack polyphenyl granule thermal insulation mortar, weighing rice straws and hydrogen peroxide, putting the rice straws and the hydrogen peroxide into a sodium hydroxide solution to obtain a fiber sample, adding the fiber sample and a titanate coupling agent into polypropylene which is heated and softened, grinding the fiber sample into modified fibers, adding zinc powder into spider silks, grinding the modified fibers to obtain modified natural spider silks, mixing the modified fibers and the modified natural spider silks to obtain modified natural spider silk fibers, putting apple peels into a greenhouse, adding rotten apple peels into polyphenyl, adding peach gum, stirring the apple peels into modified polyphenyl particles, mixing silicate cement with a silane coupling agent, adding soybean oil and yeast powder into the modified natural spider silk fibers, putting the apple peels into a fermentation tank, the modified cement is obtained by taking the modified substances, quicklime, fly ash, cellulose ether and silica fume, and stirring and mixing to obtain the anti-cracking polyphenyl particle thermal insulation mortar. Although the performance of the polyphenyl particle thermal insulation mortar obtained by the method is good, the polyphenyl particle thermal insulation mortar is complex in raw material components, contains apple peel, natural spider silk, peach gum, soybean oil, yeast powder and the like, is not economical and is difficult to apply on a large scale.
Disclosure of Invention
The invention aims to overcome the defects of the background technology and provides a preparation method of the adhesive powder polyphenyl particle thermal insulation mortar. According to the preparation method, plant straws, rubber powder, modified polyphenyl granules and ordinary portland cement are modified, so that the compatibility among materials is better, and the bonding strength and the heat preservation performance are ideal.
In order to achieve the aim of the invention, the preparation method of the rubber powder polyphenyl particle thermal insulation mortar comprises the following steps:
(1) crushing plant straws, putting the crushed plant straws into lime slurry, heating the lime slurry to 40-50 ℃, adding 25-35% of hydrogen peroxide by mass percent after the temperature is reduced to 30-40 ℃, adding a citric acid aqueous solution and a phosphate solution after 1-2 hours, adding ammonia water to adjust the pH value of the solution to 9-11, aging the solution for 15-20 hours at the temperature of 20-30 ℃, and centrifuging and washing precipitates until water washing liquid is neutral to obtain modified plant fibers;
(2) soaking the rubber powder in a bisamino silane coupling agent aqueous solution for 1-3 hours, taking out, mixing with styrene-butadiene emulsion and EVA emulsion, carrying out heat treatment at 90-100 ℃ for 30-40 minutes, and cooling to obtain modified rubber powder;
(3) mixing the graphene oxide aqueous solution with the polyphenyl particles to obtain modified polyphenyl particles;
(4) mixing and stirring ordinary portland cement and a silane coupling agent to obtain a mixture, adding starch sulfate grafted acrylic acid, the modified plant fiber obtained in the step (1), the modified rubber powder obtained in the step (2) and the modified polyphenyl granules obtained in the step (3) into the mixture, placing the mixture into a stirrer to be stirred and mixed, adding fly ash, silica fume and water, and continuously stirring and mixing to obtain the glue powder polyphenyl granule thermal insulation mortar.
Further, the plant straw in the step (1) is one or more of rice straw, wheat straw, sorghum straw and corn straw.
Further, the mass ratio of the plant straws to the lime slurry in the step (1) is 1: 1-3.
Further, the volume of the hydrogen peroxide in the step (1) is 3-5 times of the mass sum of the plant straws and the lime slurry.
Further, in the step (1), the molar ratio of citric acid to phosphate in the citric acid aqueous solution and the phosphate solution is 1: 0.4-0.6.
Further, the mass ratio of the rubber powder, the styrene-butadiene emulsion and the EVA emulsion in the step (2) is 1: 0.1-0.2: 0.1-0.2.
Further, the mass ratio of the bisamino silane coupling agent in the aqueous solution of the bisamino silane coupling agent in the step (2) is 0.4-0.8%.
Further, in the step (3), the volume-to-mass ratio of the graphene oxide aqueous solution to the polyphenyl particles is 1-3 ml: 1g of the total weight of the composition.
Further, in the step (4), the mass ratio of the portland cement, the silane coupling agent, the starch sulfate grafted acrylic acid, the modified polyphenyl particles, the modified plant fibers, the modified rubber powder, the fly ash, the silica fume and the water is 90-100: 0.8-1.2: 2-5: 35-45: 20-30: 20-30: 10-15: 15-20: 400-500.
Compared with the prior art, the invention has the following advantages:
(1) according to the invention, plant straws and rubber powder are modified, so that waste recycling is realized, and the compatibility among materials is enhanced after modification.
(2) According to the invention, the modified polyphenyl particles are obtained by mixing the graphene oxide aqueous solution and the polyphenyl particles, and are mixed with the ordinary portland cement, the modified plant fibers, the modified rubber powder, the starch sulfate grafted acrylic acid and the like which are subjected to modification treatment by the silane coupling agent for use, so that the problem of unsatisfactory bonding strength of organic materials and inorganic materials is solved, and the modified polyphenyl particles are not easy to fall off and crack when used for building exterior walls.
(3) The raw materials in the invention are commercially available in large quantities, the preparation method is simple, and the obtained glue powder polyphenyl granule thermal insulation mortar has high strength, small porosity, good thermal insulation performance, environmental protection and suitability for large-scale production and application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention. It is to be understood that the following description is only illustrative of the present invention and is not to be construed as limiting the present invention.
The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.
When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.
The indefinite articles "a" and "an" preceding an element or component of the invention are not intended to limit the number requirement (i.e., the number of occurrences) of the element or component. Thus, "a" or "an" should be read to include one or at least one, and the singular form of an element or component also includes the plural unless the number clearly indicates the singular.
Example 1
The preparation method of the adhesive powder polyphenyl particle thermal insulation mortar comprises the following steps:
(1) crushing rice straws, putting the crushed rice straws into lime slurry, heating the mixture to 45 ℃, adding 30 mass percent hydrogen peroxide after the temperature of the mixture is reduced to 35 ℃, adding a citric acid aqueous solution and a phosphate solution after 1.5 hours, adding ammonia water to adjust the pH value of the solution to be 10, aging the solution for 18 hours at 25 ℃, centrifuging the washed precipitate until the washing solution is neutral to obtain the modified plant fibers, wherein the mass ratio of the rice straws to the lime slurry is 1: 2, the volume of the hydrogen peroxide is 4 times of the mass sum of the rice straws and the lime slurry, and the molar ratio of citric acid to phosphate in the citric acid aqueous solution and the phosphate solution is 1: 0.5;
(2) placing rubber powder into 0.6% diamino silane coupling agent KH792 aqueous solution in parts by mass, soaking for 2 hours, taking out, mixing with styrene-butadiene emulsion and EVA emulsion, carrying out heat treatment at 100 ℃ for 35 minutes, and cooling to obtain modified rubber powder, wherein the mass ratio of the rubber powder to the styrene-butadiene emulsion to the EVA emulsion is 1: 0.5: 0.2;
(3) mixing the graphene oxide aqueous solution with the polyphenyl particles to obtain modified polyphenyl particles, wherein the volume mass ratio of the graphene oxide aqueous solution to the polyphenyl particles is 2 ml: 1g of a compound;
(4) mixing and stirring 1kg of ordinary portland cement and 12g of silane coupling agent KH560 to obtain a mixture, adding 50g of starch sulfate grafted acrylic acid, 300g of modified plant fiber obtained in the step (1), 300g of modified rubber powder obtained in the step (2) and 450g of modified polyphenyl granules obtained in the step (3) into the mixture, placing the mixture into a stirrer, stirring and mixing, adding 150g of fly ash, 200g of silica fume and 5kg of water, and continuously stirring and mixing to obtain the rubber powder polyphenyl granule thermal insulation mortar.
Example 2
The preparation method of the adhesive powder polyphenyl particle thermal insulation mortar comprises the following steps:
(1) crushing rice straws, putting the crushed rice straws into lime slurry, heating the mixture to 45 ℃, adding 30 mass percent hydrogen peroxide after the temperature of the mixture is reduced to 35 ℃, adding a citric acid aqueous solution and a phosphate solution after 1.5 hours, adding ammonia water to adjust the pH value of the solution to be 10, aging the solution for 18 hours at 25 ℃, centrifuging the washed precipitate until the washing solution is neutral to obtain the modified plant fibers, wherein the mass ratio of the rice straws to the lime slurry is 1: 2, the volume of the hydrogen peroxide is 4 times of the mass sum of the rice straws and the lime slurry, and the molar ratio of citric acid to phosphate in the citric acid aqueous solution and the phosphate solution is 1: 0.5;
(2) placing rubber powder into 0.6% by mass of a bisaminosilane coupling agent KH602 aqueous solution, soaking for 2 hours, taking out, mixing with styrene-butadiene emulsion and EVA emulsion, carrying out heat treatment at 100 ℃ for 35 minutes, and cooling to obtain modified rubber powder, wherein the mass ratio of the rubber powder to the styrene-butadiene emulsion to the EVA emulsion is 1: 0.5: 0.2;
(3) mixing the graphene oxide aqueous solution with the polyphenyl particles to obtain modified polyphenyl particles, wherein the volume mass ratio of the graphene oxide aqueous solution to the polyphenyl particles is 1 ml: 1g of a compound;
(4) mixing and stirring 900g of ordinary portland cement and 8g of silane coupling agent KH560 to obtain a mixture, adding 20g of starch sulfate grafted acrylic acid, 200g of modified plant fiber obtained in the step (1), 200g of modified rubber powder obtained in the step (2) and 350g of modified polyphenyl granules obtained in the step (3) into the mixture, placing the mixture into a stirrer, stirring and mixing, adding 100g of fly ash, 150g of silica fume and 4kg of water, and continuously stirring and mixing to obtain the rubber powder polyphenyl granule thermal insulation mortar.
Comparative example 1
The preparation method of the adhesive powder polyphenyl particle thermal insulation mortar comprises the following steps:
(1) putting rice straws into a sodium hydroxide solution with the mass fraction of 2%, heating and boiling, adding hydrogen peroxide with the mass fraction of 30% when the temperature is reduced to 80 ℃, preserving the heat at 80 ℃ for 40 minutes, filtering, separating to obtain filter residues, washing the filter residues to be neutral by using distilled water, and drying in an oven to obtain the modified plant fibers;
(2) placing rubber powder into 0.6% diamino silane coupling agent KH792 aqueous solution in parts by mass, soaking for 2 hours, taking out, mixing with styrene-butadiene emulsion and EVA emulsion, carrying out heat treatment at 100 ℃ for 35 minutes, and cooling to obtain modified rubber powder, wherein the mass ratio of the rubber powder to the styrene-butadiene emulsion to the EVA emulsion is 1: 0.5: 0.2;
(3) mixing the graphene oxide aqueous solution with the polyphenyl particles to obtain modified polyphenyl particles, wherein the volume mass ratio of the graphene oxide aqueous solution to the polyphenyl particles is 2 ml: 1g of a compound;
(4) mixing and stirring 1kg of ordinary portland cement and 12g of silane coupling agent KH560 to obtain a mixture, adding 50g of starch sulfate grafted acrylic acid, 300g of modified plant fiber obtained in the step (1), 300g of modified rubber powder obtained in the step (2) and 450g of modified polyphenyl granules obtained in the step (3) into the mixture, placing the mixture into a stirrer, stirring and mixing, adding 150g of fly ash, 200g of silica fume and 5kg of water, and continuously stirring and mixing to obtain the rubber powder polyphenyl granule thermal insulation mortar.
Comparative example 2
The preparation method of the adhesive powder polyphenyl particle thermal insulation mortar comprises the following steps:
(1) crushing rice straws, putting the crushed rice straws into lime slurry, heating the mixture to 45 ℃, adding 30 mass percent hydrogen peroxide after the temperature of the mixture is reduced to 35 ℃, adding a citric acid aqueous solution and a phosphate solution after 1.5 hours, adding ammonia water to adjust the pH value of the solution to be 10, aging the solution for 18 hours at 25 ℃, centrifuging the washed precipitate until the washing solution is neutral to obtain the modified plant fibers, wherein the mass ratio of the rice straws to the lime slurry is 1: 2, the volume of the hydrogen peroxide is 4 times of the mass sum of the rice straws and the lime slurry, and the molar ratio of citric acid to phosphate in the citric acid aqueous solution and the phosphate solution is 1: 0.5;
(2) mixing the graphene oxide aqueous solution with the polyphenyl particles to obtain modified polyphenyl particles, wherein the volume mass ratio of the graphene oxide aqueous solution to the polyphenyl particles is 2 ml: 1g of a compound;
(3) mixing and stirring 1kg of ordinary portland cement and 12g of silane coupling agent KH560 to obtain a mixture, adding 50g of starch sulfate grafted acrylic acid, 300g of modified plant fiber obtained in the step (1), 300g of rubber powder and 450g of modified polyphenyl granules obtained in the step (2) into the mixture, placing the mixture into a stirrer, stirring and mixing, adding 150g of fly ash, 200g of silica fume and 5kg of water, and continuously stirring and mixing to obtain the glue powder polyphenyl granule thermal insulation mortar.
Comparative example 3
The preparation method of the adhesive powder polyphenyl particle thermal insulation mortar comprises the following steps:
(1) crushing rice straws, putting the crushed rice straws into lime slurry, heating the mixture to 45 ℃, adding 30 mass percent hydrogen peroxide after the temperature of the mixture is reduced to 35 ℃, adding a citric acid aqueous solution and a phosphate solution after 1.5 hours, adding ammonia water to adjust the pH value of the solution to be 10, aging the solution for 18 hours at 25 ℃, centrifuging the washed precipitate until the washing solution is neutral to obtain the modified plant fibers, wherein the mass ratio of the rice straws to the lime slurry is 1: 2, the volume of the hydrogen peroxide is 4 times of the mass sum of the rice straws and the lime slurry, and the molar ratio of citric acid to phosphate in the citric acid aqueous solution and the phosphate solution is 1: 0.5;
(2) placing rubber powder into 0.6% diamino silane coupling agent KH792 aqueous solution in parts by mass, soaking for 2 hours, taking out, mixing with styrene-butadiene emulsion and EVA emulsion, carrying out heat treatment at 100 ℃ for 35 minutes, and cooling to obtain modified rubber powder, wherein the mass ratio of the rubber powder to the styrene-butadiene emulsion to the EVA emulsion is 1: 0.5: 0.2;
(3) mixing and stirring 1kg of ordinary portland cement and 12g of silane coupling agent KH560 to obtain a mixture, adding 50g of starch sulfate grafted acrylic acid, 300g of modified plant fiber obtained in the step (1), 300g of modified rubber powder obtained in the step (2) and 450g of polyphenyl granules into the mixture, placing the mixture into a stirrer, stirring and mixing, adding 150g of fly ash, 200g of silica fume and 5kg of water, and continuously stirring and mixing to obtain the glue powder polyphenyl granule thermal insulation mortar.
Comparative example 4
The preparation method of the adhesive powder polyphenyl particle thermal insulation mortar comprises the following steps:
(1) crushing rice straws, putting the crushed rice straws into lime slurry, heating the mixture to 45 ℃, adding 30 mass percent hydrogen peroxide after the temperature of the mixture is reduced to 35 ℃, adding a citric acid aqueous solution and a phosphate solution after 1.5 hours, adding ammonia water to adjust the pH value of the solution to be 10, aging the solution for 18 hours at 25 ℃, centrifuging the washed precipitate until the washing solution is neutral to obtain the modified plant fibers, wherein the mass ratio of the rice straws to the lime slurry is 1: 2, the volume of the hydrogen peroxide is 4 times of the mass sum of the rice straws and the lime slurry, and the molar ratio of citric acid to phosphate in the citric acid aqueous solution and the phosphate solution is 1: 0.5;
(2) placing rubber powder into 0.6% diamino silane coupling agent KH792 aqueous solution in parts by mass, soaking for 2 hours, taking out, mixing with styrene-butadiene emulsion and EVA emulsion, carrying out heat treatment at 100 ℃ for 35 minutes, and cooling to obtain modified rubber powder, wherein the mass ratio of the rubber powder to the styrene-butadiene emulsion to the EVA emulsion is 1: 0.5: 0.2;
(3) mixing the graphene oxide aqueous solution with the polyphenyl particles to obtain modified polyphenyl particles, wherein the volume mass ratio of the graphene oxide aqueous solution to the polyphenyl particles is 2 ml: 1g of a compound;
(4) and (3) adding 300g of the modified plant fiber obtained in the step (1), 300g of the modified rubber powder obtained in the step (2) and 450g of the modified polyphenyl granules obtained in the step (3) into 1kg of ordinary portland cement, placing the mixture into a stirrer, stirring and mixing, adding 150g of fly ash, 200g of silica fume and 5kg of water, and continuously stirring and mixing to obtain the glue powder polyphenyl granule thermal insulation mortar.
The performance of the glue powder polyphenyl particle thermal insulation mortar obtained in the above embodiments and comparative examples is detected by adopting a general method in the field, so that the most intuitive performance comparison with the polystyrene particle thermal insulation mortar in the prior art is facilitated, and the method of CN107445541A in the prior art is directly referred, namely, the flexural strength and the compressive strength are detected according to GB/T17671-1999 Cement mortar Strength test method (ISO method); the tensile bonding strength is detected according to a test method of a rubber powder polyphenyl particle external wall external thermal insulation system (JG 158-2004); preparing a plate-shaped sample with the size specification of 10mm multiplied by 200mm, curing for 28 days, drying to constant weight, and measuring the heat conductivity coefficient of the sample by using a DRH-III heat conductivity coefficient tester. The test results of the same example and comparative example are the average of three samples, and the final test results are shown in table 1.
TABLE 1 Performance test results of the mortar for heat preservation of rubber powder polyphenyl granule obtained in each example and comparative example
| Test item | Flexural strength/MPa (28 days) | Compressive strength/MPa (28 days) | Tensile bond strength/MPa | Porosity/% | Thermal conductivity W/(m.K) |
| Example 1 | 0.43 | 1.45 | 0.26 | 3 | 0.059 |
| Example 2 | 0.42 | 1.45 | 0.25 | 4 | 0.061 |
| Comparative example 1 | 0.25 | 1.31 | 0.15 | 4 | 0.062 |
| Comparative example 2 | 0.29 | 1.33 | 0.17 | 7 | 0.088 |
| Comparative example 3 | 0.22 | 1.15 | 0.25 | 8 | 0.079 |
| Comparative example 4 | 0.36 | 1.35 | 0.21 | 6 | 0.076 |
According to the results, the plant straw and the rubber powder are subjected to modification treatment, so that waste recycling is realized, and the compatibility among materials is enhanced after modification; the modified polyphenyl particles are obtained by mixing the graphene oxide aqueous solution with polyphenyl particles, and are mixed with common portland cement, modified plant fibers, modified rubber powder, starch sulfate grafted acrylic acid and the like which are modified by a silane coupling agent for use, so that the problem of unsatisfactory bonding strength of organic materials and inorganic materials is solved, and the obtained glue powder polyphenyl particle thermal insulation mortar is high in strength, small in porosity and good in thermal insulation performance.
It will be understood by those skilled in the art that the foregoing is only exemplary of the present invention, and is not intended to limit the invention, which is intended to cover any variations, equivalents, or improvements therein, which fall within the spirit and scope of the invention.
Claims (9)
1. The preparation method of the adhesive powder polyphenyl particle thermal insulation mortar is characterized by comprising the following steps:
(1) crushing plant straws, putting the crushed plant straws into lime slurry, heating the lime slurry to 40-50 ℃, adding 25-35% of hydrogen peroxide by mass percent after the temperature is reduced to 30-40 ℃, adding a citric acid aqueous solution and a phosphate solution after 1-2 hours, adding ammonia water to adjust the pH value of the solution to 9-11, aging the solution for 15-20 hours at the temperature of 20-30 ℃, and centrifuging and washing precipitates until water washing liquid is neutral to obtain modified plant fibers;
(2) soaking the rubber powder in a bisamino silane coupling agent aqueous solution for 1-3 hours, taking out, mixing with styrene-butadiene emulsion and EVA emulsion, carrying out heat treatment at 90-100 ℃ for 30-40 minutes, and cooling to obtain modified rubber powder;
(3) mixing the graphene oxide aqueous solution with the polyphenyl particles to obtain modified polyphenyl particles;
(4) mixing and stirring ordinary portland cement and a silane coupling agent to obtain a mixture, adding starch sulfate grafted acrylic acid, the modified plant fiber obtained in the step (1), the modified rubber powder obtained in the step (2) and the modified polyphenyl granules obtained in the step (3) into the mixture, placing the mixture into a stirrer to be stirred and mixed, adding fly ash, silica fume and water, and continuously stirring and mixing to obtain the glue powder polyphenyl granule thermal insulation mortar.
2. The preparation method of the rubber powder polyphenyl granule thermal mortar according to claim 1, wherein the plant straw in the step (1) is one or more of rice straw, wheat straw, sorghum straw and corn straw.
3. The preparation method of the rubber powder polyphenyl particle thermal insulation mortar as claimed in claim 1, wherein the mass ratio of the plant straw to the lime slurry in the step (1) is 1: 1-3.
4. The preparation method of the rubber powder polyphenyl particle thermal insulation mortar as claimed in claim 1, wherein the volume of the hydrogen peroxide in the step (1) is 3-5 times of the mass sum of the plant straw and the lime slurry.
5. The preparation method of the rubber powder polyphenyl particle thermal mortar as claimed in claim 1, wherein the molar ratio of citric acid to phosphate in the citric acid aqueous solution and the phosphate solution in the step (1) is 1: 0.4-0.6.
6. The preparation method of the rubber powder polyphenyl particle thermal mortar as claimed in claim 1, wherein the mass ratio of the rubber powder, the styrene-butadiene emulsion and the EVA emulsion in the step (2) is 1: 0.1-0.2: 0.1-0.2.
7. The preparation method of the rubber powder polyphenyl granule thermal mortar according to claim 1, wherein the mass percentage of the diamino silane coupling agent in the diamino silane coupling agent aqueous solution in the step (2) is 0.4-0.8%.
8. The preparation method of the rubber powder polyphenyl particle thermal mortar according to claim 1, wherein the volume mass ratio of the graphene oxide aqueous solution to the polyphenyl particles in the step (3) is 1-3 ml: 1g of the total weight of the composition.
9. The preparation method of the rubber powder polyphenyl particle thermal mortar according to claim 1, wherein in the step (4), the mass ratio of the portland cement, the silane coupling agent, the starch sulfate grafted acrylic acid, the modified polyphenyl particles, the modified plant fibers, the modified rubber powder, the fly ash, the silica fume and the water is 90-100: 0.8-1.2: 2-5: 35-45: 20-30: 20-30: 10-15: 15-20: 400-500.
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Cited By (2)
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|---|---|---|---|---|
| CN112456829A (en) * | 2021-01-05 | 2021-03-09 | 辽宁银盛水泥集团有限公司 | Process for producing cement by using solid waste |
| CN115286304A (en) * | 2022-08-10 | 2022-11-04 | 中国能源建设集团江苏省电力建设第一工程有限公司 | Polyphenyl particle thermal insulation mortar |
-
2020
- 2020-10-19 CN CN202011114891.5A patent/CN112142414A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112456829A (en) * | 2021-01-05 | 2021-03-09 | 辽宁银盛水泥集团有限公司 | Process for producing cement by using solid waste |
| CN115286304A (en) * | 2022-08-10 | 2022-11-04 | 中国能源建设集团江苏省电力建设第一工程有限公司 | Polyphenyl particle thermal insulation mortar |
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Application publication date: 20201229 |