CN110295677B - Super-hydrophobic particle for waterproof and heat-insulation integration of assembly type building joint and preparation method and application thereof - Google Patents
Super-hydrophobic particle for waterproof and heat-insulation integration of assembly type building joint and preparation method and application thereof Download PDFInfo
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- CN110295677B CN110295677B CN201910429315.0A CN201910429315A CN110295677B CN 110295677 B CN110295677 B CN 110295677B CN 201910429315 A CN201910429315 A CN 201910429315A CN 110295677 B CN110295677 B CN 110295677B
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- 230000003075 superhydrophobic effect Effects 0.000 title claims abstract description 46
- 238000009413 insulation Methods 0.000 title claims abstract description 35
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- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000010276 construction Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 17
- 230000002209 hydrophobic effect Effects 0.000 claims description 65
- 229920005989 resin Polymers 0.000 claims description 44
- 239000011347 resin Substances 0.000 claims description 44
- 239000003795 chemical substances by application Substances 0.000 claims description 33
- 239000011162 core material Substances 0.000 claims description 25
- -1 polytetrafluoroethylene Polymers 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 22
- 239000004570 mortar (masonry) Substances 0.000 claims description 21
- 239000011259 mixed solution Substances 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 16
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- 238000006243 chemical reaction Methods 0.000 claims description 12
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- 229910052602 gypsum Inorganic materials 0.000 claims description 11
- 229920002050 silicone resin Polymers 0.000 claims description 11
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 10
- 239000004698 Polyethylene Substances 0.000 claims description 10
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 10
- 229920000573 polyethylene Polymers 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 10
- 239000010451 perlite Substances 0.000 claims description 9
- 235000019362 perlite Nutrition 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 8
- 239000012948 isocyanate Substances 0.000 claims description 8
- 150000002513 isocyanates Chemical class 0.000 claims description 8
- LAQFLZHBVPULPL-UHFFFAOYSA-N methyl(phenyl)silicon Chemical compound C[Si]C1=CC=CC=C1 LAQFLZHBVPULPL-UHFFFAOYSA-N 0.000 claims description 8
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 claims description 7
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 claims description 7
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- 238000001914 filtration Methods 0.000 claims description 6
- GKQPCPXONLDCMU-CCEZHUSRSA-N lacidipine Chemical compound CCOC(=O)C1=C(C)NC(C)=C(C(=O)OCC)C1C1=CC=CC=C1\C=C\C(=O)OC(C)(C)C GKQPCPXONLDCMU-CCEZHUSRSA-N 0.000 claims description 6
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- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical compound NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 claims description 5
- 239000002956 ash Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- IUNMPGNGSSIWFP-UHFFFAOYSA-N dimethylaminopropylamine Chemical compound CN(C)CCCN IUNMPGNGSSIWFP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000839 emulsion Substances 0.000 claims description 5
- 239000010881 fly ash Substances 0.000 claims description 5
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- 239000008187 granular material Substances 0.000 claims description 4
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 4
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- 238000004132 cross linking Methods 0.000 claims description 2
- 239000012528 membrane Substances 0.000 claims description 2
- NCWQJOGVLLNWEO-UHFFFAOYSA-N methylsilicon Chemical compound [Si]C NCWQJOGVLLNWEO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims 1
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- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 235000010643 Leucaena leucocephala Nutrition 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
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- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
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- 239000002131 composite material Substances 0.000 description 1
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Classifications
-
- 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
- C04B20/10—Coating or impregnating
- C04B20/12—Multiple coating or impregnating
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/06—Polystyrene
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
- E04B1/6801—Fillings therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Civil Engineering (AREA)
- Electromagnetism (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Materials Engineering (AREA)
- Sealing Material Composition (AREA)
- Building Environments (AREA)
Abstract
The invention relates to a super-hydrophobic particle for waterproof and heat-insulating integration of an assembly type building joint, a preparation method and application thereof2And (4) preparing. Compared with the prior art, the invention solves the problems of easy water seepage, poor heat preservation effect and the like of the assembled building joint, can realize two requirements of water resistance and heat insulation by one-time construction, obviously reduces the construction procedures, improves the construction efficiency, has simple preparation and construction processes and has very wide application prospect.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a super-hydrophobic particle for waterproof and heat-insulation integration of an assembly type building joint, and a preparation method and application thereof.
Background
The assembly type building structure is formed by assembling prefabricated components on a construction site, has the advantages of rapidness, high efficiency, low carbon, environmental protection, energy saving, cost reduction and the like, and is beneficial to the development of building industrialization and housing industrialization. The connection technology among prefabricated wall panels, floor slabs, columns and other components is the key of the assembly type building, and the difficulty in splicing the components of the assembly type building is how to effectively process the joints among the components and ensure the connection performance among the prefabricated components and the overall performance of the structure.
Horizontal and vertical seams of the external wall panel of the fabricated building are waterproof weak links. Currently, the most common methods of seam treatment are of two types: firstly adopt hard cement mortar to inlay and pack the crack and handle, but because cement mortar's initial cohesive force is relatively poor, can not form effective connection between with the component, and ordinary cement easily contracts the fracture, and then causes the seepage at seam position. Secondly, the seam is sealed by adopting the macromolecule shaping sealing material, such as a sealing strip, a sealing gasket and the like, but the installation of the given sealing material is difficult due to errors generated in the splicing of the components, and the sealing material is not ageing-resistant, and is easy to deform, fall off and leak after long-term use.
Meanwhile, with the development of economic society, people have higher and higher requirements on environmental protection and energy conservation, and the heat insulation index of the fabricated building also becomes a factor which must be considered when designing, building and accepting the building. Likewise, the seams of the fabricated components are weak links to their insulating properties. At present, the waterproof and heat insulation measures of the assembly type building joint are usually constructed separately, the two-time construction is complex, and the application of the two-time construction is limited to a certain extent. Therefore, there is a need to develop a new waterproof and heat-insulating integrated technology, which can meet the two technical requirements of waterproof and heat insulation in one process, thereby simplifying construction cost, reducing construction difficulty, and providing a new solution for waterproof and heat insulation of horizontal and longitudinal joints of an assembly type building.
Patent CN 107840609 a discloses a waterproof thermal insulation mortar, which is prepared from more than ten raw materials such as cement, hard calcium carbonate, redispersible latex powder, etc., and has certain waterproof property and thermal insulation property. However, due to the limitation of raw materials and construction process, the waterproof thermal insulation mortar still has the problems of poor initial adhesion with members, easy shrinkage and cracking, poor waterproof performance, easy moisture absorption, poor thermal insulation effect and the like
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the super-hydrophobic particles for the integration of water resistance and heat insulation of the assembly type building joint as well as the preparation method and the application thereof, solves the problems of easy water seepage, poor heat insulation effect and the like of the assembly type building joint, can realize two requirements of water resistance and heat insulation by one-time construction, obviously reduces the construction procedures, improves the construction efficiency, has simple preparation and construction processes and has very wide application prospect.
The purpose of the invention can be realized by the following technical scheme:
the invention provides a super-hydrophobic particle for water-proof and heat-insulation integration of an assembly type building joint, which comprises a particle core material and a hydrophobic particle formed by a hydrophobic film wrapped on the surface of the particle core material, wherein a nanoscale rough structure is constructed on the surface of the hydrophobic film.
As a preferred technical scheme, the granular material with the continuous grading of the granular core material is one or more selected from hollow vitrified micro-beads, expanded perlite, expanded vermiculite, fly ash floating beads and polyphenyl granules, and the grain diameter is 5-200 meshes.
As a preferred technical scheme, the hydrophobic membrane is obtained by crosslinking and curing hydrophobic resin and a corresponding curing agent on the surface of a particle core material;
the hydrophobic resin is selected from one or more of methyl phenyl silicone resin, methyl silicone resin, low phenyl methyl silicone resin, organic silicone resin emulsion, Polytetrafluoroethylene (PTFE), Polychlorotrifluoroethylene (PCTFE) and polyvinyl fluoride (PVF);
the curing agent is selected from one or more of isocyanate, polyethylene polyamine, m-phenylenediamine, dipropylenetriamine and dimethylaminopropylamine.
As a further preferable technical scheme:
when the hydrophobic resin adopts polytetrafluoroethylene, polychlorotrifluoroethylene or polyvinyl fluoride, the curing agent adopts isocyanate;
when the hydrophobic resin is methyl phenyl silicon resin, methyl silicon resin, low phenyl methyl silicon resin or organic silicon resin emulsion, the curing agent is one or more of polyethylene polyamine, m-phenylenediamine, dipropylenetriamine and dimethylaminopropylamine.
As a preferable technical scheme, in the hydrophobic particles, the weight ratio of the particle core material, the hydrophobic resin and the curing agent is as follows: 90-95:5-10:1-5.
As a preferable technical scheme, the nano-scale rough structure coats nano SiO on the surface of the hydrophobic film by adopting a sol-gel method2And (4) preparing.
The invention also provides a preparation method of the super-hydrophobic particles for the waterproof and heat-insulating integration of the assembly type building joint, which comprises the following steps:
(1) mixing and stirring the hydrophobic resin and the curing agent uniformly to form a mixed solution, and heating the mixed solution;
(2) uniformly stirring the mixed solution and the particle core material, and heating and curing until the hydrophobic resin and the curing agent are completely cured to form hydrophobic particles;
(3) placing the hydrophobic particles in absolute ethyl alcohol, adding ammonia water, stirring under a heating condition, then slowly adding ethyl orthosilicate until the solution becomes turbid, stopping the reaction after the solution is fully reacted, standing, filtering out the hydrophobic particles at the lower layer, cleaning and drying to obtain the super-hydrophobic particles for the waterproof and heat-insulation integration of the assembly type building joint.
As a preferred technical scheme:
in the step (1), the heating temperature is 50 ℃; so as to increase the fluidity of the mixed solution and the curing reaction rate of the resin and the curing agent;
in the step (2), the heating and curing conditions are 24 hours at 70 ℃.
As a preferable technical scheme, in the step (3), the heating condition after adding the ammonia water is 30min at 40 ℃; the time required for full reaction is 12 hours; cleaning was performed 3 times using deionized water.
As a preferable technical scheme, in the step (3), the ratio of the usage amount of the hydrophobic particles, the absolute ethyl alcohol, the ammonia water and the ethyl orthosilicate is as follows: 50g, 200mL, 25mL, 20-25 mL.
The invention also provides application of the super-hydrophobic particles for waterproof and heat-insulation integration of the assembly type building joint, which comprises the following steps:
(a) removing floating ash and pre-wetted floating water at the joint of the fabricated building;
(b) filling the seam with a backing material (including foamed polyethylene plastic, foamed polystyrene plastic or wood material) and reasonably controlling the embedding depth of the backing material;
(c) selecting a gypsum-based sealing material (which can be a common gypsum-based sealing material in the market, has good filling property and adhesion, contains an expansion component, can effectively compensate the shrinkage of mortar, and prevents shrinkage cracks);
(d) uniformly mixing 30 parts of super-hydrophobic particles for waterproof and heat-insulation integration of assembly type building joints with 50 parts of gypsum-based sealing material, and adding 20 parts of water to form uniform sealing mortar slurry;
(5) and uniformly filling the sealing mortar slurry to the joint of the fabricated building (tools such as a putty knife or a caulking gun can be adopted), and scraping the surface of the sealing mortar before surface drying to finish the sealing treatment of the joint of the fabricated building.
According to the invention, the surface of the porous light core material (such as expanded perlite, hollow vitrified micro-beads, fly ash floating beads and the like) is coated with the hydrophobic resin, so that a layer of hydrophobic film is formed on the surface of the particle core material, and the surface energy of the particle core material is further reduced, and the particle core material has hydrophobicity.
And according to the Cassie model (FIG. 1) cos θ ═ fs(1+cosθ1) -1 (formula 1)
Wherein f issFor projecting solid areas S in the composite contact surface1And apparent contact area S2Ratio of (f)s< 1); theta is the apparent contact angle theta1Is the intrinsic contact angle of a smooth and flat surface.
As can be seen from formula 1, when the surface roughness is sufficiently large, fsApproaching 0 and theta approaching 180 deg., the drop is on the "tip", i.e. the apparent roughness of the material is added, making the originally hydrophobic surface more hydrophobic. Based on the method, the nano-scale SiO is coated on the surface of the hydrophobic film by a sol-gel method2The nano-scale rough structure is constructed to have super-hydrophobic characteristics, so that the super-hydrophobic particles have a very good waterproof effect. Meanwhile, due to the bonding and curing effects of the resin, a hydrophobic film with certain mechanical strength is formed on the surfaces of the particle core materials such as expanded perlite, expanded vermiculite and polyphenyl particles, the defect of insufficient strength of the particles is overcome, the pressure bearing capacity of the particles is improved, and the light-weight high-strength performance requirements can be met. In addition, the porous light material has low heat conductivity coefficient and good heat preservation and insulation performance, so the super-hydrophobic particles prepared by taking the porous light material as the core material have waterproof and heat insulation functions, the super-hydrophobic property of the particles can effectively prevent water from permeating, prevent the particles from absorbing moisture, and overcome the problems that the porous materials such as expanded perlite and polyphenyl particles absorb water for a long time, further the heat conductivity coefficient rises rapidly and the heat insulation function is lost, and the super-hydrophobic property of the particles is lowThe long-term performance of the heat insulation performance can be obviously improved.
Compared with the prior art, the invention has the following advantages: the problems that assembly type building joints are prone to water seepage, poor in heat preservation effect and the like can be solved, two requirements of water resistance and heat insulation can be met through one-time construction, construction procedures are obviously reduced, construction efficiency is improved, and the assembly type building joint heat preservation structure is simple in preparation and construction process and has a very wide application prospect.
Drawings
FIG. 1 is a Cassie model schematic.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Example 1
Step 1: preparing super-hydrophobic particles for waterproof and heat insulation integration of assembly building joints:
(1) mixing and stirring 5 parts of methyl phenyl silicone resin and 1 part of dipropylenetriamine curing agent uniformly to form a mixed solution, and heating the mixed solution for 2 minutes under the condition of a water bath at 50 ℃ to increase the fluidity of the mixed solution and the curing reaction rate of the resin and the curing agent;
(2) then uniformly stirring the mixed solution and 94 parts of 70-200 mesh hollow vitrified micro bubbles, and curing for 24 hours at 70 ℃ until the hydrophobic resin and the curing agent are completely cured to form hydrophobic particles;
(3) and then 50g of hydrophobic particles are placed in 200ml of absolute ethyl alcohol, 25ml of ammonia water is added for mixing, the mixture is heated and stirred for 30 minutes under the condition of 40 ℃ water bath, then 20-25ml of tetraethoxysilane is slowly added until the solution becomes turbid, the reaction is stopped after the solution is fully reacted for 12 hours, and the mixture is placed still. And then filtering out the hydrophobic particles at the lower layer, washing for 3 times by using deionized water, and drying to obtain the super-hydrophobic particles for the waterproof and heat-insulating integration of the assembly type building joint.
Step 2: construction of assembly type building joint:
the method specifically comprises the following steps:
(a) removing floating ash and pre-wetted floating water at the joint of the fabricated building;
(b) filling the joints with a backing material, such as foamed polyethylene plastic, foamed polystyrene plastic, a wood material, and the like, and reasonably controlling the embedding depth of the backing material;
(c) the common gypsum-based sealing material in the market is selected, has good filling property and adhesion, contains an expansion component, and can effectively compensate the shrinkage of mortar and prevent shrinkage cracks.
(d) Uniformly mixing 30 parts of super-hydrophobic particles for waterproof and heat-insulation integration of assembly type building joints with 50 parts of gypsum-based sealing material, and adding 20 parts of water to form uniform sealing mortar slurry;
(e) and uniformly filling the sealing mortar slurry to the joint of the fabricated building by using a putty knife or a caulking gun, and scraping the surface of the sealing mortar before surface drying to finish the sealing treatment of the joint of the fabricated building.
Example 2
Step 1: preparing the waterproof and heat-insulating integrated super-hydrophobic particles of the assembly type building joint:
(1) mixing 6 parts of methyl silicone resin and 2 parts of polyethylene polyamine curing agent, uniformly stirring to form a mixed solution, and heating for 2 minutes in a water bath condition at 50 ℃ to increase the fluidity of the mixed solution and the curing reaction rate of the hydrophobic resin and the curing agent;
(2) then uniformly stirring the mixed solution and 92 parts of expanded perlite with the particle size of 25-140 meshes, and curing for 24 hours at 70 ℃ until the resin and the curing agent are completely cured to form hydrophobic particles;
(3) and then 50g of hydrophobic particles are placed in 200ml of absolute ethyl alcohol, 25ml of ammonia water is added for mixing, the mixture is heated and stirred for 30 minutes under the condition of 40 ℃ water bath, then 20-25ml of tetraethoxysilane is slowly added until the solution becomes turbid, the reaction is stopped after the solution is fully reacted for 12 hours, and the mixture is placed still. And then filtering out the hydrophobic particles at the lower layer, washing for 3 times by using deionized water, and drying to obtain the super-hydrophobic particles for the waterproof and heat-insulating integration of the assembly type building joint.
Step 2: construction of assembly type building joint:
the method specifically comprises the following steps:
(a) removing floating ash and pre-wetted floating water at the joint of the fabricated building;
(b) filling the joints with a backing material, such as foamed polyethylene plastic, foamed polystyrene plastic, a wood material, and the like, and reasonably controlling the embedding depth of the backing material;
(c) the common gypsum-based sealing material in the market is selected, has good filling property and adhesion, contains an expansion component, and can effectively compensate the shrinkage of mortar and prevent shrinkage cracks.
(d) Uniformly mixing 30 parts of super-hydrophobic particles for waterproof and heat-insulation integration of assembly type building joints with 50 parts of gypsum-based sealing material, and adding 20 parts of water to form uniform sealing mortar slurry;
(e) and uniformly filling the sealing mortar slurry to the joint of the fabricated building by using a putty knife or a caulking gun, and scraping the surface of the sealing mortar before surface drying to finish the sealing treatment of the joint of the fabricated building.
Example 3
Step 1: preparing the waterproof and heat-insulating integrated super-hydrophobic particles of the assembly type building joint:
(1) mixing 7 parts of polytetrafluoroethylene resin and 1 part of isocyanate curing agent, stirring uniformly to form a mixed solution, and heating for 2 minutes under the condition of 50 ℃ water bath to increase the fluidity of the mixed solution and the curing reaction rate of the resin and the curing agent;
(2) then uniformly stirring the mixed solution and 92 parts of polyphenyl particles with the particle size of 5-40 meshes, and curing for 24 hours at 70 ℃ until the resin and the curing agent are completely cured to form hydrophobic particles;
(3) and then 50g of hydrophobic particles are placed in 200ml of absolute ethyl alcohol, 25ml of ammonia water is added for mixing, the mixture is heated and stirred for 30 minutes under the condition of 40 ℃ water bath, then 20-25ml of tetraethoxysilane is slowly added until the solution becomes turbid, the reaction is stopped after the solution is fully reacted for 12 hours, and the mixture is placed still. And then filtering out the hydrophobic particles at the lower layer, washing for 3 times by using deionized water, and drying to obtain the super-hydrophobic particles for the waterproof and heat-insulating integration of the assembly type building joint.
Step 2: construction of assembly type building joint:
the method specifically comprises the following steps:
(a) removing floating ash and pre-wetted floating water at the joint of the fabricated building;
(b) filling the joints with a backing material, such as foamed polyethylene plastic, foamed polystyrene plastic, a wood material, and the like, and reasonably controlling the embedding depth of the backing material;
(c) the common gypsum-based sealing material in the market is selected, has good filling property and adhesion, contains an expansion component, and can effectively compensate the shrinkage of mortar and prevent shrinkage cracks.
(d) Uniformly mixing 30 parts of super-hydrophobic particles for waterproof and heat-insulation integration of assembly type building joints with 50 parts of gypsum-based sealing material, and adding 20 parts of water to form uniform sealing mortar slurry;
(e) and uniformly filling the sealing mortar slurry to the joint of the fabricated building by using a putty knife or a caulking gun, and scraping the surface of the sealing mortar before surface drying to finish the sealing treatment of the joint of the fabricated building.
Example 4
This example is substantially the same as example 1 except that in this example, the ratio of parts by weight of the particle core material, the hydrophobic resin, and the curing agent in the hydrophobic particles is: 95:5:3.
Example 5
This example is substantially the same as example 1 except that in this example, the ratio of parts by weight of the particle core material, the hydrophobic resin, and the curing agent in the hydrophobic particles is: 90:10:2.
Example 6
This example is substantially the same as example 1 except that in this example, the ratio of parts by weight of the particle core material, the hydrophobic resin, and the curing agent in the hydrophobic particles is: 90:10:5.
Example 7
This example is substantially the same as example 1 except that expanded vermiculite was selected for the particle core material.
Example 8
This example is substantially the same as example 1, except that fly ash floating beads are selected as the particle core material in this example.
Example 9
This example is substantially the same as example 1, except that in this example, the core material of the particle is selected from a mixture of hollow vitrified micro bubbles, expanded perlite, expanded vermiculite, fly ash floating beads and polyphenyl particles, for example, a mixture of hollow vitrified micro bubbles and expanded perlite in a mass ratio of 1:1, a mixture of expanded perlite and expanded vermiculite in a mass ratio of 1:2, and the like.
Example 10
This example is substantially the same as example 1 except that in this example, polychlorotrifluoroethylene was used as the hydrophobic resin and isocyanate was used as the curing agent.
Example 11
This example is substantially the same as example 1, except that in this example, polyvinyl fluoride is used as the hydrophobic resin and isocyanate is used as the curing agent.
Example 12
This example is substantially the same as example 1 except that in this example, polytetrafluoroethylene and polychlorotrifluoroethylene were used in a mixture at a mass ratio of 1:1 as the hydrophobic resin, and isocyanate was used as the curing agent.
Example 13
This example is substantially the same as example 1, except that in this example, at least one of methyl phenyl silicone resin, methyl silicone resin, low phenyl methyl silicone resin and silicone resin emulsion can be used as the hydrophobic resin, and in this case, one or more of polyethylene polyamine, m-phenylenediamine, dipropylene triamine and dimethylaminopropylamine can be used as the corresponding curing agent.
The super-hydrophobic particles for the waterproof and heat-insulating integration of the fabricated building joints prepared in examples 1, 2 and 3 were subjected to contact angle and rolling angle tests of water drops on the surfaces thereof, and the thermal conductivity thereof was measured by a steady-state sphere method, and the results are shown in table 1.
Table 1 super hydrophobic particle performance test
As can be seen from table 1, the superhydrophobic particles for the integration of waterproofing and heat insulation of the fabricated building joint prepared by the invention have excellent superhydrophobic performance and heat insulation performance, and have excellent waterproofing and heat insulation integration effect.
In order to examine the durability of the superhydrophobic particles for waterproof and adiabatic integration of fabricated building joints, the contact angle and the rolling angle of water beads on the surface of the superhydrophobic particles prepared in examples 1, 2 and 3 were measured after the superhydrophobic particles were left to stand for 6 months under natural conditions, and the results are shown in table 2.
Table 2 super hydrophobic particle durability test (after 6 months)
As can be seen from Table 2, the super-hydrophobic particles for the waterproof and heat-insulating integration of the assembly type building joint prepared by the invention have excellent super-hydrophobic and heat-insulating performances after 6 months and have good durability.
The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (8)
1. The super-hydrophobic particles are used for realizing the waterproof and heat-insulating integrated structure of the assembly type building joint in one-time construction, and comprise a particle core material and hydrophobic particles formed by hydrophobic films wrapped on the surface of the particle core material, wherein the surface of the hydrophobic film is constructed with a nanoscale rough structure;
the granular material with the continuous grading of the granular core material is one or more selected from hollow vitrified micro-beads, expanded perlite, expanded vermiculite, fly ash floating beads and polyphenyl granules, and the grain diameter is 5-200 meshes;
the nano-scale rough structure is formed by coating nano SiO on the surface of a hydrophobic film by adopting a sol-gel method2Preparing;
the preparation method of the super-hydrophobic particles comprises the following steps:
(1) mixing and stirring the hydrophobic resin and the curing agent uniformly to form a mixed solution, and heating the mixed solution;
(2) uniformly stirring the mixed solution and the particle core material, and heating and curing until the hydrophobic resin and the curing agent are completely cured to form hydrophobic particles;
(3) placing the hydrophobic particles in absolute ethyl alcohol, adding ammonia water, stirring under a heating condition, then slowly adding ethyl orthosilicate until the solution becomes turbid, stopping the reaction after the solution is fully reacted, standing, filtering out the hydrophobic particles at the lower layer, cleaning and drying to obtain the super-hydrophobic particles for the waterproof and heat-insulation integration of the assembly type building joint.
2. The super-hydrophobic particles for the waterproof and heat-insulating integration of the fabricated building joint as claimed in claim 1, wherein the hydrophobic membrane is obtained by crosslinking and curing hydrophobic resin and corresponding curing agent on the surface of the particle core material;
the hydrophobic resin is selected from one or more of methyl phenyl silicone resin, methyl silicone resin, low phenyl methyl silicone resin, organic silicone resin emulsion, polytetrafluoroethylene, polychlorotrifluoroethylene and polyvinyl fluoride;
the curing agent is selected from one or more of isocyanate, polyethylene polyamine, m-phenylenediamine, dipropylenetriamine and dimethylaminopropylamine.
3. The superhydrophobic particle for waterproof and heat-insulating integration of fabricated building joints according to claim 2, wherein:
when the hydrophobic resin adopts polytetrafluoroethylene, polychlorotrifluoroethylene or polyvinyl fluoride, the curing agent adopts isocyanate;
when the hydrophobic resin is methyl phenyl silicon resin, methyl silicon resin, low phenyl methyl silicon resin or organic silicon resin emulsion, the curing agent is one or more of polyethylene polyamine, m-phenylenediamine, dipropylenetriamine and dimethylaminopropylamine.
4. The super-hydrophobic particle for waterproof and heat-insulation integration of fabricated building joints as claimed in claim 2, wherein the weight ratio of the particle core material, the hydrophobic resin and the curing agent in the hydrophobic particle is: 90-95:5-10:1-5.
5. The preparation method of the super-hydrophobic particles for the waterproof and heat-insulating integration of the fabricated building joint according to any one of claims 1 to 4, characterized by comprising the following steps:
(1) mixing and stirring the hydrophobic resin and the curing agent uniformly to form a mixed solution, and heating the mixed solution;
(2) uniformly stirring the mixed solution and the particle core material, and heating and curing until the hydrophobic resin and the curing agent are completely cured to form hydrophobic particles;
(3) placing the hydrophobic particles in absolute ethyl alcohol, adding ammonia water, stirring under a heating condition, then slowly adding ethyl orthosilicate until the solution becomes turbid, stopping the reaction after the solution is fully reacted, standing, filtering out the hydrophobic particles at the lower layer, cleaning and drying to obtain the super-hydrophobic particles for the waterproof and heat-insulation integration of the assembly type building joint.
6. The method for preparing the superhydrophobic particles for waterproof and heat-insulating integration of fabricated building joints according to claim 5, wherein:
in the step (1), the heating temperature is 50 ℃;
in the step (2), the heating and curing conditions are 24 hours at 70 ℃.
7. The method for preparing the super-hydrophobic particles for the waterproof and heat-insulating integration of the fabricated building joint as claimed in claim 5, wherein in the step (3), the heating condition after adding ammonia water is 30min at 40 ℃; the time required for full reaction is 12 hours; cleaning with deionized water for 3 times;
in the step (3), the usage ratio of the hydrophobic particles, the absolute ethyl alcohol, the ammonia water and the ethyl orthosilicate is as follows: 50g, 200mL, 25mL, 20-25 mL.
8. The application of the super-hydrophobic particles for the waterproof and heat-insulating integration of the fabricated building joint as claimed in any one of claims 1 to 4, is characterized by comprising the following steps:
(a) removing floating ash and pre-wetted floating water at the joint of the fabricated building;
(b) filling the seam with a backing material;
(c) selecting a gypsum-based sealing material;
(d) uniformly mixing 30 parts of super-hydrophobic particles for waterproof and heat-insulation integration of assembly type building joints with 50 parts of gypsum-based sealing material, and adding 20 parts of water to form uniform sealing mortar slurry;
(e) and uniformly filling the sealing mortar slurry to the joint of the fabricated building, and scraping the surface of the sealing mortar before surface drying to finish the sealing treatment of the fabricated building joint.
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