CN115806407A - Calcium oxide filler for aerated bricks and production process thereof - Google Patents
Calcium oxide filler for aerated bricks and production process thereof Download PDFInfo
- Publication number
- CN115806407A CN115806407A CN202211474879.4A CN202211474879A CN115806407A CN 115806407 A CN115806407 A CN 115806407A CN 202211474879 A CN202211474879 A CN 202211474879A CN 115806407 A CN115806407 A CN 115806407A
- Authority
- CN
- China
- Prior art keywords
- calcium oxide
- temperature
- hours
- filler
- gel matrix
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 title claims abstract description 82
- 239000000292 calcium oxide Substances 0.000 title claims abstract description 79
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 239000000945 filler Substances 0.000 title claims abstract description 74
- 239000011449 brick Substances 0.000 title claims abstract description 50
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 45
- 238000002360 preparation method Methods 0.000 claims abstract description 23
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 46
- 229920000642 polymer Polymers 0.000 claims description 42
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 40
- 239000000243 solution Substances 0.000 claims description 37
- 238000010438 heat treatment Methods 0.000 claims description 36
- 239000000463 material Substances 0.000 claims description 35
- 239000011159 matrix material Substances 0.000 claims description 35
- 238000001354 calcination Methods 0.000 claims description 33
- 238000001035 drying Methods 0.000 claims description 30
- 238000003756 stirring Methods 0.000 claims description 30
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 28
- 238000000498 ball milling Methods 0.000 claims description 28
- 239000011259 mixed solution Substances 0.000 claims description 26
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 24
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 claims description 21
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 20
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 20
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 20
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 20
- 229910052757 nitrogen Inorganic materials 0.000 claims description 20
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 18
- 239000008367 deionised water Substances 0.000 claims description 18
- 229910021641 deionized water Inorganic materials 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 18
- 238000004321 preservation Methods 0.000 claims description 18
- 239000000725 suspension Substances 0.000 claims description 17
- 239000002270 dispersing agent Substances 0.000 claims description 16
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 15
- LIKFHECYJZWXFJ-UHFFFAOYSA-N dimethyldichlorosilane Chemical compound C[Si](C)(Cl)Cl LIKFHECYJZWXFJ-UHFFFAOYSA-N 0.000 claims description 15
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 14
- YJKHMSPWWGBKTN-UHFFFAOYSA-N 2,2,3,3,4,4,5,5,6,6,7,7-dodecafluoroheptyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)F YJKHMSPWWGBKTN-UHFFFAOYSA-N 0.000 claims description 14
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims description 14
- 239000000661 sodium alginate Substances 0.000 claims description 14
- 235000010413 sodium alginate Nutrition 0.000 claims description 14
- 229940005550 sodium alginate Drugs 0.000 claims description 14
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 12
- QNILTEGFHQSKFF-UHFFFAOYSA-N n-propan-2-ylprop-2-enamide Chemical compound CC(C)NC(=O)C=C QNILTEGFHQSKFF-UHFFFAOYSA-N 0.000 claims description 12
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 12
- 238000007873 sieving Methods 0.000 claims description 11
- 229910021532 Calcite Inorganic materials 0.000 claims description 10
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 10
- 239000012065 filter cake Substances 0.000 claims description 10
- 239000000706 filtrate Substances 0.000 claims description 10
- 239000005457 ice water Substances 0.000 claims description 10
- 239000003208 petroleum Substances 0.000 claims description 10
- 238000002791 soaking Methods 0.000 claims description 10
- MGIYRDNGCNKGJU-UHFFFAOYSA-N isothiazolinone Chemical compound O=C1C=CSN1 MGIYRDNGCNKGJU-UHFFFAOYSA-N 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- 238000000967 suction filtration Methods 0.000 claims description 8
- JRMUNVKIHCOMHV-UHFFFAOYSA-M tetrabutylammonium bromide Chemical compound [Br-].CCCC[N+](CCCC)(CCCC)CCCC JRMUNVKIHCOMHV-UHFFFAOYSA-M 0.000 claims description 7
- 238000003828 vacuum filtration Methods 0.000 claims description 7
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- 238000007710 freezing Methods 0.000 claims description 6
- 230000008014 freezing Effects 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 238000004108 freeze drying Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000010907 mechanical stirring Methods 0.000 claims description 5
- 238000012986 modification Methods 0.000 claims description 5
- 230000004048 modification Effects 0.000 claims description 5
- 239000000047 product Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- 239000002689 soil Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 238000009210 therapy by ultrasound Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 238000006116 polymerization reaction Methods 0.000 claims description 4
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000001953 recrystallisation Methods 0.000 claims description 3
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 3
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- QGJOPFRUJISHPQ-NJFSPNSNSA-N carbon disulfide-14c Chemical compound S=[14C]=S QGJOPFRUJISHPQ-NJFSPNSNSA-N 0.000 claims description 2
- 238000009413 insulation Methods 0.000 abstract description 10
- 238000005336 cracking Methods 0.000 abstract description 5
- 230000000052 comparative effect Effects 0.000 description 13
- 239000004568 cement Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- 239000000178 monomer Substances 0.000 description 5
- 239000004567 concrete Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 239000011557 critical solution Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012712 reversible addition−fragmentation chain-transfer polymerization Methods 0.000 description 2
- 238000001338 self-assembly Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000001291 vacuum drying Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000003899 bactericide agent Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- -1 fluorine ions Chemical class 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses a calcium oxide filler for an aerated brick and a production process thereof, and relates to the technical field of aerated brick auxiliaries. The invention is used for solving the technical problems that the hydrophobic moisture-proof performance, the heat insulation performance and the performance of reducing shrinkage cracking of the calcium oxide after the calcium oxide is compounded are all to be improved, and the purity and whiteness of the calcium oxide are required to be improved during preparation; the hydrophobic heat-insulating filler with the spongy porous structure has good hydrophobicity, stability and heat-insulating performance.
Description
Technical Field
The invention relates to the technical field of aerated brick auxiliaries, and in particular relates to a calcium oxide filler for an aerated brick and a production process thereof.
Background
The aerated brick is a novel wall material which is prepared by taking stone powder, cement and lime as main raw materials through raw material preparation, pouring, cutting, molding and high-pressure steam curing, is mainly applied to non-bearing wall masonry and frame structure filling, and is a light material popularized and applied in the key industrial and civil fields of the national ministry of construction and the national science and commission. The aerated brick has the characteristics of light weight, good heat preservation and insulation performance, strong shock resistance, good processing performance, good sound insulation performance and the like. In recent years, higher requirements are also put forward on the comprehensive performance of the calcium oxide filler for the aerated bricks so as to meet the multifunctional requirements of wall materials.
The invention patent with the publication number of CN104671695B discloses a modified calcium oxide expanding agent for cement concrete, which consists of a temperature-sensitive polymer with an Upper Critical Solution Temperature (UCST) and a calcium oxide expanding clinker, wherein the UCST temperature-sensitive polymer is coated on the surface of the calcium oxide expanding clinker, and the UCST temperature-sensitive polymer accounts for 0.5 to 10 percent of the total mass of the modified calcium oxide expanding agent for cement concrete; the upper critical solution temperature of the UCST temperature sensitive polymer is 20-50 ℃. The modified calcium oxide expanding agent for the cement concrete reduces the hydration of the calcium oxide expanding agent in the plastic stage of the cement concrete. However, researches show that the existing calcium oxide filler for the aerated bricks and the production process thereof have the following technical problems: the hydrophobic moisture resistance, the heat insulation performance and the performance of reducing shrinkage cracking after calcium oxide compounding are all required to be improved, and the purity and the whiteness of the calcium oxide are required to be improved during preparation.
Disclosure of Invention
The invention aims to provide a calcium oxide filling agent for aerated bricks and a production process thereof, which are used for solving the technical problems that the hydrophobic moisture-proof performance, the heat insulation performance and the performance of reducing shrinkage cracking of calcium oxide after being compounded with calcium oxide in the prior art need to be improved, and the purity and whiteness of the calcium oxide need to be improved during preparation.
The purpose of the invention can be realized by the following technical scheme:
the invention provides a calcium oxide filler for aerated bricks, which is prepared from the following components in parts by weight: 85-92 parts of calcium oxide clinker, 3-8 parts of temperature-sensitive weather-resistant polymer, 0.5-3 parts of hydrophobic heat-insulating filler and 0.02-0.1 part of dispersant; the temperature-sensitive weather-resistant polymer is prepared from acetone, carbon disulfide and chloroform to obtain a thiocarbonate intermediate 1, the thiocarbonate intermediate 1 and N-isopropylacrylamide undergo a block polymerization reaction to obtain an intermediate 2, and the intermediate 2 and the dodecafluoroheptyl methacrylate undergo a block polymerization reaction to obtain the temperature-sensitive weather-resistant polymer; the hydrophobic heat-insulating filler is obtained by processing sodium alginate and hydrophobic modified hydroxyethyl cellulose to obtain a gel matrix, and the gel matrix is subjected to hydrophobic modification by dimethyldichlorosilane.
As a further improved scheme of the invention, the preparation method of the temperature-sensitive weather-resistant polymer comprises the following steps:
placing a three-neck flask with a mechanical stirrer in an ice-water bath, sequentially adding petroleum ether, acetone, carbon disulfide and chloroform, introducing nitrogen to discharge air, adding tetrabutyl ammonium bromide under mechanical stirring, slowly dropwise adding 25wt% sodium hydroxide solution into a constant-pressure funnel, and reacting for 14 hours in the ice-water bath after dropwise adding; dropwise adding 20wt% hydrochloric acid solution to adjust the pH value to 4, carrying out vacuum filtration, recrystallizing the filtrate, and drying at 45 ℃ to constant weight to obtain a solid powdery thiocarbonate intermediate 1;
adding N-isopropylacrylamide and the thiocarbonate intermediate 1 into a three-neck flask with a mechanical stirrer, dissolving by using tetrahydrofuran, introducing nitrogen to discharge air, adding azobisisobutyronitrile, heating to 70 ℃, preserving heat, reacting for 6 hours, adding cyclohexane, standing, performing reduced pressure suction filtration, and drying a filter cake to constant weight at 45 ℃ to obtain an intermediate 2;
step three, dissolving dodecafluoroheptyl methacrylate in tetrahydrofuran, adding the dissolved dodecafluoroheptyl methacrylate into a three-neck flask with a mechanical stirrer, adding the intermediate 2, introducing nitrogen to discharge air, heating to 50 ℃, keeping the temperature and stirring for 20min, adding azobisisobutyronitrile, heating to 80 ℃, keeping the temperature and reacting for 6 hours, adding cyclohexane, standing, carrying out reduced pressure suction filtration, and drying a filter cake at 50 ℃ to constant weight to obtain white temperature-sensitive weather-resistant polymer powder.
The synthesis reaction formula of the temperature-sensitive weather-resistant polymer is as follows:
when the structure and the preparation method of the temperature-sensitive weather-resistant polymer are designed for experiments, the poly N-isopropyl acrylamide block polymer is considered to have low critical phase transition temperature and can be adjusted by copolymerization of other hydrophilic and hydrophobic monomers, and fluorine ions in the fluorine-containing polymer have good heat resistance and stability due to small radius, mutual repulsion and strong electronegativity. Thus, the temperature-sensitive amphiphilic self-assembly weather-resistant polymer is prepared by using N-isopropylacrylamide as a hydrophilic monomer and dodecafluoroheptyl methacrylate as a hydrophobic monomer through a reversible addition-fragmentation chain transfer polymerization method; because the dodecafluoroheptyl methacrylate contains a plurality of C-F bonds, electronegativity, hydrophobicity and weather resistance are greatly improved, the hydrogen bonding effect of amide in the polymer is weakened, the energy required for destroying the affinity effect with water is reduced, and the low critical phase transition temperature is reduced to a certain extent.
As a further improved scheme of the invention, in the step one, the dosage ratio of the petroleum ether, the acetone, the carbon disulfide, the chloroform, the tetrabutyl ammonium bromide and the sodium hydroxide solution is 30-40 mL: 10-15 mL:5mL of: 15mL of: 0.2g: 40-50 g; the solvent for recrystallization is acetone and petroleum ether according to the volume ratio of 3:1, a mixed solvent; in the second step, the dosage ratio of the N-isopropyl acrylamide, the thiocarbonate intermediate 1, the tetrahydrofuran, the azobisisobutyronitrile and the cyclohexane is 7-8 g: 0.2-0.4 g:40mL of: 0.05g:30mL; in the third step, the dosage ratio of the dodecafluoroheptyl methacrylate to the intermediate 2 to the azobisisobutyronitrile to the cyclohexane is 0.38 to 0.45g: 2-3 g:0.03g:20mL.
As a further improvement of the invention, the preparation method of the hydrophobic heat insulation filler comprises the following steps:
step one, adding sodium alginate into deionized water, and stirring for 30min to form a mixed solution a; adding the hydrophobically modified hydroxyethyl cellulose into ethanol, and stirring for 1 hour to form a mixed solution b; mixing the mixed solution a and the mixed solution b according to the weight ratio of 3-7: 5-9, stirring uniformly, carrying out ultrasonic treatment for 20min, and carrying out vacuum defoaming to obtain a suspension;
and step two, adding the suspension into a mold for sealing, freezing the suspension by using liquid nitrogen, then placing the frozen suspension into a freeze dryer for freeze drying for 24 hours at the temperature of minus 65 to minus 50 ℃ to obtain a gel matrix, soaking the gel matrix into a mixed solution of an ethanol solution of dimethyldichlorosilane and deionized water, standing the gel matrix for 16 hours at room temperature, placing the gel matrix into a constant-temperature air blast drying oven at the temperature of 140 to 150 ℃ for 1 hour, drying the gel matrix to constant weight at the temperature of 70 to 85 ℃, and crushing the gel matrix and sieving the gel matrix by using a 10-mesh sieve to obtain the hydrophobic heat-insulating filler.
According to the hydrophobic heat-insulating filler disclosed by the invention, sodium alginate and hydrophobic modified hydroxyethyl cellulose are used as main raw materials, a hydrophobic cellulose-based sodium alginate gel matrix is obtained through freeze drying treatment, the gel matrix is immersed in a mixed solution process of an ethanol solution of dimethyl dichlorosilane and deionized water, the sodium alginate is in dispersed contact with the dimethyl dichlorosilane, and the dimethyl dichlorosilane is used for carrying out hydrophobic modification on the sodium alginate and embedding the sodium alginate into a gel network structure in a constant-temperature drying process.
As a further improved scheme of the invention, the dosage ratio of the sodium alginate to the deionized water in the first step is 3-5 g:100mL; the dosage ratio of the hydrophobically modified hydroxyethyl cellulose to the ethanol is 1-3 g: 10-20 g; in the second step, the concentration of the ethanol solution of the dimethyldichlorosilane is 3wt%, and the weight ratio of the ethanol solution to the deionized water is 5-7: 2.
as a further improved scheme of the invention, the specific surface area of the calcium oxide clinker is 350-420 m 2 /kg, dispersionThe agent is one or a mixture of more of sodium tripolyphosphate, polyethylene glycol, citric acid and sodium dodecyl benzene sulfonate; the hydrophobically modified hydroxyethyl cellulose has a trade name of natrosol Plus 330, a viscosity of 550 to 700cps, and a pH of 7 in aqueous solution.
The invention also provides a production process of the calcium oxide filler for the aerated bricks, which comprises the following steps:
s1, selecting and crushing: removing soil and dust on the surface of calcite with the calcium carbonate content of more than or equal to 60% and the whiteness of more than or equal to 93%, and crushing the calcite with a crusher until the particle size is less than or equal to 20mm to obtain a crushed material;
s2, calcining and ball-milling: adding 5-12 parts of sodium carbonate and 3-7 parts of isothiazolinone into 60-80 parts of the crushed material according to parts by weight, stirring for 20min at the rotating speed of 600-800 rpm, placing in a calcining furnace, heating to 600-650 ℃, and carrying out heat preservation and calcination for 3 hours; heating to 800-850 ℃, and keeping the temperature for 8 hours; heating to 1250 ℃, and carrying out heat preservation and calcination for 5 hours to obtain a calcined material; putting the calcined material into a ball mill, and performing ball milling at the rotating speed of a cylinder body of 38rpm to obtain a ball-milled material with the discharge particle size of 0.4 mm;
s3, clinker preparation: soaking the ball-milled material in 2mol/L hydrochloric acid solution, heating to 80 ℃, stirring for 1 hour, filtering, drying the filtrate at 100 ℃ to constant weight, calcining at 900 ℃ for 6 hours, and cooling to obtain calcium oxide clinker;
s4, mixing and ball milling: uniformly mixing the calcium oxide clinker, the temperature-sensitive weather-resistant polymer, the hydrophobic heat-insulating filler and the dispersant, and performing ball milling and sieving to obtain the product with the specific surface area of 300-500 m 2 Calcium oxide filler for aerated bricks per kg.
The invention has the following beneficial effects:
1. the calcium oxide filler for the aerated brick is obtained by compounding calcium oxide clinker, a temperature-sensitive weather-resistant polymer and a hydrophobic heat-insulating filler, wherein the temperature-sensitive weather-resistant polymer adopts N-isopropylacrylamide as a hydrophilic monomer and dodecafluoroheptyl methacrylate as a hydrophobic monomer, and the temperature-sensitive amphiphilic self-assembly weather-resistant polymer is prepared by a reversible addition-fragmentation chain transfer polymerization method, so that external water vapor can be prevented from entering to improve the moisture resistance, the reaction activity can be improved in the hardening and shrinking processes of the aerated brick, the hydration reaction is promoted, the beneficial expansion is improved, and the shrinkage and cracking of the aerated brick caused by temperature reduction are compensated; the hydrophobic heat-insulating filler with the spongy porous structure has good hydrophobicity, stability and heat-insulating performance, can penetrate into the calcium oxide clinker to improve the hydrophobicity and the heat-insulating performance on one hand, and can be matched with a temperature-sensitive weather-resistant polymer to improve the weather resistance and the stability of the aerated brick on the other hand.
2. The production process of the calcium oxide filler for the aerated brick comprises the steps of material selection crushing, calcining ball milling, clinker preparation and mixed ball milling, and is different from the prior art in that an organic amine bactericide, namely isothiazolinone permeates to kill bacteria in crushed materials, and the purity and whiteness of calcium oxide powder can be improved to the maximum extent by matching with a plurality of stages of heating and calcining steps, so that the content of magnesium element is reduced; ball milling and sieving to obtain the loose and porous calcium oxide filler with uniform particle size distribution for the aerated bricks.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Example 1
The calcium oxide filler for the aerated bricks is prepared from the following components in parts by weight: 860g of calcium oxide clinker, 35g of temperature-sensitive weather-resistant polymer, 6.2g of hydrophobic heat-insulating filler and 0.4g of dispersant; wherein the specific surface area of the calcium oxide clinker is 380m 2 Per kg, the dispersant is sodium dodecyl benzene sulfonate; hydrophobically modified hydroxyethyl cellulose has a trade designation of natrosol Plus 330, a viscosity of 600cps, and a pH of 7 in aqueous solution.
The preparation method of the temperature-sensitive weather-resistant polymer comprises the following steps:
placing a three-neck flask with a mechanical stirrer in an ice-water bath, sequentially adding 36mL of petroleum ether, 12mL of acetone, 5mL of carbon disulfide and 15mL of chloroform, introducing nitrogen to discharge air, adding 0.2g of tetrabutyl ammonium bromide under mechanical stirring, slowly dropwise adding 46g and 25wt% of sodium hydroxide solution into a constant-pressure funnel, and reacting for 14 hours in the ice-water bath after dropwise adding; dropwise adding 20wt% hydrochloric acid solution to adjust the pH value to 4, carrying out vacuum filtration, recrystallizing the filtrate, and drying at 45 ℃ to constant weight to obtain a solid powdery thiocarbonate intermediate 1;
adding 7.6g of N-isopropylacrylamide and 0.28g of thiocarbonate intermediate 1 into a three-neck flask with a mechanical stirrer, dissolving by using 40mL of tetrahydrofuran, introducing nitrogen to discharge air, adding 0.05g of azobisisobutyronitrile, heating to 70 ℃, carrying out heat preservation reaction for 6 hours, adding 30mL of cyclohexane, standing, carrying out reduced pressure suction filtration, and drying a filter cake at 45 ℃ to constant weight to obtain an intermediate 2;
and step three, dissolving 0.42g of dodecafluoroheptyl methacrylate by using 5mL of tetrahydrofuran, adding the dissolved solution into a three-neck flask with a mechanical stirrer, adding 2.5g of intermediate 2, introducing nitrogen to discharge air, heating to 50 ℃, keeping the temperature, stirring for 20min, adding 0.03g of azobisisobutyronitrile, heating to 80 ℃, carrying out heat preservation reaction for 6 hours, adding 20mL of cyclohexane, standing, carrying out reduced pressure suction filtration, and drying a filter cake at 50 ℃ to constant weight to obtain white temperature-sensitive weather-resistant polymer powder.
The preparation method of the hydrophobic heat insulation filler comprises the following steps:
step one, adding 4.2g of sodium alginate into 100mL of deionized water, and stirring for 30min to form a mixed solution a; adding 2.2g of hydrophobically modified hydroxyethyl cellulose into 16g of ethanol, and stirring for 1 hour to form a mixed solution b; mixing the mixed solution a and the mixed solution b according to the weight ratio of 5:7, mixing, uniformly stirring, carrying out ultrasonic treatment for 20min, and carrying out vacuum defoaming to obtain a suspension;
step two, adding the suspension into a mold, sealing, freezing by liquid nitrogen, then placing the suspension into a freeze dryer, freezing and drying for 24 hours at the temperature of minus 58 ℃ to obtain a gel matrix, soaking the gel matrix into a mixed solution of an ethanol solution of dimethyldichlorosilane and deionized water, standing for 16 hours at room temperature, then placing the gel matrix into a constant-temperature air-blowing drying oven at the temperature of 145 ℃ for 1 hour, drying at the temperature of 78 ℃ to constant weight, crushing and sieving by a sieve of 10 meshes to obtain a hydrophobic heat-insulating filler; wherein the concentration of the ethanol solution of the dimethyldichlorosilane is 3wt%, and the weight ratio of the ethanol solution to the deionized water is 3:1.
the production process of the calcium oxide filler for the aerated brick comprises the following steps:
s1, selecting and crushing: removing soil and dust on the surface of calcite with calcium carbonate content of more than or equal to 60% and whiteness of more than or equal to 93%, and crushing the calcite with a crusher until the particle size is less than or equal to 20mm to obtain a crushed material;
s2, calcining and ball-milling: adding 85g of sodium carbonate and 56g of isothiazolinone into 720g of crushed materials, stirring for 20min at the rotating speed of 720rpm, placing in a calcining furnace, heating to 630 ℃, and carrying out heat preservation and calcination for 3 hours; heating to 830 ℃, and carrying out heat preservation and calcination for 8 hours; heating to 1250 ℃, and carrying out heat preservation and calcination for 5 hours to obtain a calcined material; putting the calcined material into a ball mill, and carrying out ball milling at the rotating speed of a cylinder body of 38rpm to obtain a ball milling material with the discharge granularity of 0.4 mm;
s3, clinker preparation: soaking the ball-milled material in 2mol/L hydrochloric acid solution, heating to 80 ℃, stirring for 1 hour, filtering, drying the filtrate at 100 ℃ to constant weight, calcining at 900 ℃ for 6 hours, and cooling to obtain calcium oxide clinker;
s4, mixing and ball milling: uniformly mixing the calcium oxide clinker, the temperature-sensitive weather-resistant polymer, the hydrophobic heat-insulating filler and the dispersant, and performing ball milling and sieving to obtain the product with the specific surface area of 400m 2 Calcium oxide filler for aerated bricks per kg.
Example 2
The calcium oxide filler for the aerated bricks is prepared from the following components in parts by weight: 895g of calcium oxide clinker, 62g of temperature-sensitive weather-resistant polymer, 16g of hydrophobic heat-insulating filler and 0.5g of dispersing agent; wherein the specific surface area of the calcium oxide clinker is 400m 2 Per kg, the dispersant is sodium tripolyphosphate; hydrophobically modified hydroxyethyl cellulose has a trade designation of natrosol Plus 330, a viscosity of 620cps, and an aqueous solution pH of 7.
The preparation method of the temperature-sensitive weather-resistant polymer comprises the following steps:
step one, placing a three-neck flask with a mechanical stirrer in an ice-water bath, sequentially adding 32mL of petroleum ether, 14mL of acetone, 5mL of carbon disulfide and 15mL of chloroform, introducing nitrogen to discharge air, adding 0.2g of tetrabutylammonium bromide under mechanical stirring, slowly dropwise adding 50g and 25wt% of sodium hydroxide solution into a constant-pressure funnel, and reacting for 14 hours in the ice-water bath after dropwise adding; dropwise adding 20wt% hydrochloric acid solution to adjust the pH value to 4, carrying out vacuum filtration, recrystallizing the filtrate, and drying at 45 ℃ to constant weight to obtain a solid powdery thiocarbonate intermediate 1; wherein, the solvent for recrystallization is acetone and petroleum ether according to the volume ratio of 3: 1;
adding 7.8g of N-isopropylacrylamide and 0.35g of thiocarbonate intermediate 1 into a three-neck flask with a mechanical stirrer, dissolving by using 40mL of tetrahydrofuran, introducing nitrogen to discharge air, adding 0.05g of azobisisobutyronitrile, heating to 70 ℃, carrying out heat preservation reaction for 6 hours, adding 30mL of cyclohexane, standing, carrying out reduced pressure suction filtration, and drying a filter cake at 45 ℃ to constant weight to obtain an intermediate 2;
and step three, dissolving 0.44g of dodecafluoroheptyl methacrylate by using 5mL of tetrahydrofuran, adding the dissolved solution into a three-neck flask with a mechanical stirrer, adding 2.9g of the intermediate 2, introducing nitrogen to discharge air, heating to 50 ℃, keeping the temperature, stirring for 20min, adding 0.03g of azobisisobutyronitrile, heating to 80 ℃, keeping the temperature, reacting for 6 hours, adding 20mL of cyclohexane, standing, carrying out vacuum filtration, and drying a filter cake at 50 ℃ to constant weight to obtain white temperature-sensitive weather-resistant polymer powder.
The preparation method of the hydrophobic heat insulation filler comprises the following steps:
step one, adding 4.8g of sodium alginate into deionized water, and stirring for 30min to form a mixed solution a; adding 2.7g of hydrophobically modified hydroxyethyl cellulose into 20g of ethanol, and stirring for 1 hour to form a mixed solution b; mixing the mixed solution a and the mixed solution b according to the weight ratio of 6:7, mixing, uniformly stirring, carrying out ultrasonic treatment for 20min, and carrying out vacuum defoaming to obtain a suspension;
adding the suspension into a mold, sealing, freezing by using liquid nitrogen, then placing the frozen suspension into a freeze dryer, carrying out freeze drying for 24 hours at the temperature of minus 60 ℃ to obtain a gel matrix, soaking the gel matrix into a mixed solution of an ethanol solution of dimethyldichlorosilane and deionized water, standing the gel matrix for 16 hours at room temperature, placing the gel matrix into a constant-temperature air-blast drying oven at the temperature of 142 ℃ for 1 hour, drying the gel matrix to constant weight at the temperature of 76 ℃, and crushing and sieving the gel matrix by using a 10-mesh sieve to obtain the hydrophobic heat-insulating filler; wherein the concentration of the ethanol solution of the dimethyldichlorosilane is 3wt%, and the weight ratio of the ethanol solution to the deionized water is 7:2.
the production process of the calcium oxide filler for the aerated brick comprises the following steps:
s1, selecting and crushing: removing soil and dust on the surface of calcite with calcium carbonate content of more than or equal to 60% and whiteness of more than or equal to 93%, and crushing the calcite with a crusher until the particle size is less than or equal to 20mm to obtain a crushed material;
s2, calcining and ball-milling: adding 112g of sodium carbonate and 66g of isothiazolinone into 800g of the crushed material, stirring for 20min at the rotating speed of 660rpm, placing the mixture in a calcining furnace, heating to 647 ℃, and carrying out heat preservation and calcination for 3 hours; heating to 850 ℃, and keeping the temperature for calcining for 8 hours; heating to 1250 ℃, and carrying out heat preservation and calcination for 5 hours to obtain a calcined material; putting the calcined material into a ball mill, and carrying out ball milling at the rotating speed of a cylinder body of 38rpm to obtain a ball milling material with the discharge granularity of 0.4 mm;
s3, clinker preparation: soaking the ball-milled material in 2mol/L hydrochloric acid solution, heating to 80 ℃, stirring for 1 hour, filtering, drying the filtrate at 100 ℃ to constant weight, calcining at 900 ℃ for 6 hours, and cooling to obtain calcium oxide clinker;
s4, mixing and ball milling: uniformly mixing the calcium oxide clinker, the temperature-sensitive weather-resistant polymer, the hydrophobic heat-insulating filler and the dispersant, and performing ball milling and sieving to obtain the product with the specific surface area of 500m 2 Calcium oxide filling agent for aerated bricks per kg.
Example 3
The calcium oxide filler for the aerated bricks is prepared from the following components in parts by weight: 913g of calcium oxide clinker, 76g of temperature-sensitive weather-resistant polymer, 26g of hydrophobic heat-insulating filler and 1g of dispersant; wherein the specific surface area of the calcium oxide clinker is 410m 2 Per kg, the dispersant is polyethylene glycol; hydrophobically modified hydroxyethyl cellulose has a trade designation of natrosol Plus 330, a viscosity of 680cps, and a pH of 7 in aqueous solution.
The preparation method of the temperature-sensitive weather-resistant polymer comprises the following steps:
step one, placing a three-neck flask with a mechanical stirrer in an ice-water bath, sequentially adding 40mL of petroleum ether, 10mL of acetone, 5mL of carbon disulfide and 15mL of chloroform, introducing nitrogen to discharge air, adding 0.2g of tetrabutylammonium bromide under mechanical stirring, slowly dropwise adding 42g and 25wt% of sodium hydroxide solution into a constant-pressure funnel, and reacting for 14 hours in the ice-water bath after dropwise adding; dropwise adding 20wt% hydrochloric acid solution to adjust the pH value to 4, carrying out vacuum filtration, recrystallizing the filtrate, and drying at 45 ℃ to constant weight to obtain a solid powdery thiocarbonate intermediate 1;
adding 8g of N-isopropylacrylamide and 0.4g of thiocarbonate intermediate 1 into a three-neck flask with a mechanical stirrer, dissolving by using 40mL of tetrahydrofuran, introducing nitrogen to discharge air, adding 0.05g of azobisisobutyronitrile, heating to 70 ℃, carrying out heat preservation reaction for 6 hours, adding 30mL of cyclohexane, standing, carrying out reduced pressure suction filtration, and drying a filter cake at 45 ℃ to constant weight to obtain an intermediate 2;
and step three, dissolving 0.45g of dodecafluoroheptyl methacrylate by using 5mL of tetrahydrofuran, adding the dissolved solution into a three-neck flask with a mechanical stirrer, adding 2.2g of the intermediate 2, introducing nitrogen to discharge air, heating to 50 ℃, keeping the temperature, stirring for 20min, adding 0.03g of azobisisobutyronitrile, heating to 80 ℃, keeping the temperature, reacting for 6 hours, adding 20mL of cyclohexane, standing, carrying out vacuum filtration, and drying a filter cake at 50 ℃ to constant weight to obtain white temperature-sensitive weather-resistant polymer powder.
The preparation method of the hydrophobic heat-insulating filler comprises the following steps:
step one, adding 5g of sodium alginate into 100mL of deionized water, and stirring for 30min to form a mixed solution a; adding 1.5g of hydrophobically modified hydroxyethyl cellulose into 15g of ethanol, and stirring for 1 hour to form a mixed solution b; mixing the mixed solution a and the mixed solution b according to the weight ratio of 2:3, mixing, uniformly stirring, carrying out ultrasonic treatment for 20min, and carrying out vacuum defoaming to obtain a suspension;
adding the suspension into a mold, sealing, freezing by using liquid nitrogen, then placing the frozen suspension into a freeze dryer, carrying out freeze drying for 24 hours at the temperature of minus 62 ℃ to obtain a gel matrix, soaking the gel matrix into a mixed solution of an ethanol solution of dimethyldichlorosilane and deionized water, standing the gel matrix for 16 hours at room temperature, placing the gel matrix into a constant-temperature air-blast drying oven at the temperature of 140 ℃ for 1 hour, drying the gel matrix to constant weight at the temperature of 82 ℃, and crushing and sieving the gel matrix by using a 10-mesh sieve to obtain the hydrophobic heat-insulating filler; wherein the concentration of the ethanol solution of the dimethyldichlorosilane is 3wt%, and the weight ratio of the ethanol solution to the deionized water is 7:2.
the production process of the calcium oxide filler for the aerated bricks comprises the following steps:
s1, selecting and crushing: removing soil and dust on the surface of calcite with calcium carbonate content of more than or equal to 60% and whiteness of more than or equal to 93%, and crushing the calcite with a crusher until the particle size is less than or equal to 20mm to obtain a crushed material;
s2, calcining and ball-milling: adding 82g of sodium carbonate and 50g of isothiazolinone into 650g of crushed material, stirring for 20min at the rotating speed of 800rpm, placing in a calcining furnace, heating to 650 ℃, and carrying out heat preservation and calcination for 3 hours; heating to 846 ℃, and calcining for 8 hours under the condition of heat preservation; heating to 1250 ℃, and carrying out heat preservation and calcination for 5 hours to obtain a calcined material; putting the calcined material into a ball mill, and carrying out ball milling at the rotating speed of a cylinder body of 38rpm to obtain a ball milling material with the discharge granularity of 0.4 mm;
s3, clinker preparation: soaking the ball-milled material in 2mol/L hydrochloric acid solution, heating to 80 ℃, stirring for 1 hour, filtering, drying the filtrate at 100 ℃ to constant weight, calcining at 900 ℃ for 6 hours, and cooling to obtain calcium oxide clinker;
s4, mixing and ball milling: uniformly mixing the calcium oxide clinker, the temperature-sensitive weather-resistant polymer, the hydrophobic heat-insulating filler and the dispersant, and performing ball milling and sieving to obtain the product with the specific surface area of 350m 2 Calcium oxide filler for aerated bricks per kg.
Example 4
The calcium oxide filler for the aerated bricks of the embodiment is different from the calcium oxide filler for the aerated bricks of the embodiment 3 in that the calcium oxide filler for the aerated bricks is prepared from the following components in parts by weight: 870g of calcium oxide clinker, 55g of temperature-sensitive weather-resistant polymer, 15g of hydrophobic heat-insulating filler and 0.8g of dispersant.
Example 5
The calcium oxide filler for the aerated bricks of the embodiment is different from the calcium oxide filler for the aerated bricks of the embodiment 3 in that the calcium oxide filler for the aerated bricks is prepared from the following components in parts by weight: 890g of calcium oxide clinker, 62g of temperature-sensitive weather-resistant polymer, 18g of hydrophobic heat-insulating filler and 0.7g of dispersing agent.
Comparative example 1
The calcium oxide filler for the aerated brick of the comparative example is different from that of example 3 in that a temperature-sensitive weather-resistant polymer is not added.
Comparative example 2
The calcium oxide filler for an aerated brick of the present comparative example is different from example 3 in that a hydrophobic heat insulating filler is not added.
Comparative example 3
The calcium oxide filler for an aerated brick of the present comparative example is different from example 3 in that isothiazolinone is not added in the calcining and ball-milling step at the time of preparation.
Performance testing
30g of the calcium oxide filler for the air-added bricks prepared in the examples 1 to 5 and the comparative examples 1 to 3 is mixed with 40g of portland cement, 65g of fly ash, 30g of gypsum, 25g of wood powder and 1g of aluminum powder, and then the mixture is subjected to casting molding, blank cutting and autoclaved curing to obtain the calcium oxide filler with the density of 1.5g/cm 3 The aerated brick is tested to absorb water for 7 days and 28 days under the conditions that the temperature is 25 ℃ and the relative humidity is 70 percent, and the normal-temperature compressive strength and the heat conductivity coefficient are tested according to the standard GB/T3994-2013, and the specific test results are shown in the following table:
from the test results in the table above, it can be seen that after the calcium oxide filler prepared in the embodiment of the present invention is applied to an aerated brick, the water absorption rates in 7 days and 28 days are both smaller than the comparative examples, the room temperature compressive strength is both greater than the comparative examples, and the thermal conductivity is both smaller than the comparative examples, which indicates that the calcium oxide filler of the embodiment of the present invention has good hydrophobic moisture resistance, compressive strength, and thermal insulation performance, and the moisture resistance, strength, and thermal insulation performance of the aerated brick are significantly improved. Comparative example 1 has reduced moisture resistance due to a reduced ability to prevent the entry of external moisture without adding a temperature-sensitive weather-resistant polymer, while failing to promote advantageous expansion and being susceptible to shrinkage cracking to significantly reduce strength. In the comparative example 2, since the hydrophobic heat-insulating filler is not added, the hydrophobic heat-insulating filler with the spongy porous structure cannot show good hydrophobicity, stability and heat-insulating performance, so that the water absorption rate, compressive strength and heat conductivity coefficient are all reduced. Comparative example 3 because isothiazolinone is not added in the step of calcining and ball-milling in preparation, the purity and whiteness of the calcium carbonate clinker are reduced, and the hydrophobicity, strength and heat-insulating property are slightly reduced.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (7)
1. The calcium oxide filler for the aerated bricks is characterized by being prepared from the following components in parts by weight: 85 to 92 portions of calcium oxide clinker, 3 to 8 portions of temperature-sensitive weather-resistant polymer, 0.5 to 3 portions of hydrophobic heat-insulating filler and 0.02 to 0.1 portion of dispersant; the temperature-sensitive weather-resistant polymer is prepared from acetone, carbon disulfide and chloroform to obtain a thiocarbonate intermediate 1, the thiocarbonate intermediate 1 and N-isopropylacrylamide undergo a block polymerization reaction to obtain an intermediate 2, and the intermediate 2 and the dodecafluoroheptyl methacrylate undergo a block polymerization reaction to obtain the temperature-sensitive weather-resistant polymer; the hydrophobic heat-insulating filler is obtained by processing sodium alginate and hydrophobic modified hydroxyethyl cellulose to obtain a gel matrix, and the gel matrix is subjected to hydrophobic modification treatment by dimethyldichlorosilane.
2. The calcium oxide filler for the aerated bricks according to claim 1, wherein the preparation method of the temperature-sensitive weather-resistant polymer comprises the following steps:
placing a three-neck flask with a mechanical stirrer in an ice-water bath, sequentially adding petroleum ether, acetone, carbon disulfide and chloroform, introducing nitrogen to discharge air, adding tetrabutyl ammonium bromide under mechanical stirring, slowly dropwise adding 25wt% sodium hydroxide solution into a constant-pressure funnel, and reacting for 14 hours in the ice-water bath after dropwise adding; dropwise adding 20wt% hydrochloric acid solution to adjust the pH value to 4, carrying out vacuum filtration, recrystallizing the filtrate, and drying at 45 ℃ to constant weight to obtain a solid powdery thiocarbonate intermediate 1;
adding N-isopropylacrylamide and the thiocarbonate intermediate 1 into a three-neck flask with a mechanical stirrer, dissolving by using tetrahydrofuran, introducing nitrogen to discharge air, adding azobisisobutyronitrile, heating to 70 ℃, preserving heat and reacting for 6 hours, adding cyclohexane, standing, performing reduced pressure suction filtration, and drying a filter cake to constant weight at 45 ℃ to obtain an intermediate 2;
and step three, dissolving the dodecafluoroheptyl methacrylate in tetrahydrofuran, adding the dissolved dodecafluoroheptyl methacrylate into a three-neck flask with a mechanical stirrer, adding the intermediate 2, introducing nitrogen to discharge air, heating to 50 ℃, keeping the temperature and stirring for 20min, adding azobisisobutyronitrile, heating to 80 ℃, keeping the temperature and reacting for 6 hours, adding cyclohexane, standing, carrying out reduced pressure suction filtration, and drying a filter cake at 50 ℃ to constant weight to obtain white temperature-sensitive weather-resistant polymer powder.
3. The calcium oxide filler for aerated bricks according to claim 2, wherein the dosage ratio of the petroleum ether, acetone, carbon disulfide, chloroform, tetrabutylammonium bromide and sodium hydroxide solution in the first step is 30-40 mL: 10-15 mL:5mL of: 15mL of: 0.2g: 40-50 g; the solvent for recrystallization is acetone and petroleum ether according to the volume ratio of 3: 1; in the second step, the dosage ratio of the N-isopropyl acrylamide, the thiocarbonate intermediate 1, the tetrahydrofuran, the azobisisobutyronitrile and the cyclohexane is 7-8 g: 0.2-0.4 g:40mL of: 0.05g:30mL; in the third step, the dosage ratio of the dodecafluoroheptyl methacrylate to the intermediate 2 to the azobisisobutyronitrile to the cyclohexane is 0.38 to 0.45g: 2-3 g:0.03g:20mL.
4. The calcium oxide filler for aerated bricks according to claim 1, wherein the preparation method of the hydrophobic heat-insulating filler comprises the following steps:
step one, adding sodium alginate into deionized water, and stirring for 30min to form a mixed solution a; adding the hydrophobically modified hydroxyethyl cellulose into ethanol, and stirring for 1 hour to form a mixed solution b; mixing the mixed solution a and the mixed solution b according to the weight ratio of 3-7: 5-9, stirring uniformly, carrying out ultrasonic treatment for 20min, and carrying out vacuum defoaming to obtain a suspension;
and step two, adding the suspension into a mold for sealing, freezing the suspension by using liquid nitrogen, then placing the frozen suspension into a freeze dryer for freeze drying for 24 hours at the temperature of minus 65 to minus 50 ℃ to obtain a gel matrix, soaking the gel matrix into a mixed solution of an ethanol solution of dimethyldichlorosilane and deionized water, standing the gel matrix for 16 hours at room temperature, placing the gel matrix into a constant-temperature air blast drying oven at the temperature of 140 to 150 ℃ for 1 hour, drying the gel matrix to constant weight at the temperature of 70 to 85 ℃, and crushing the gel matrix and sieving the gel matrix by using a 10-mesh sieve to obtain the hydrophobic heat-insulating filler.
5. The calcium oxide filler for aerated bricks according to claim 4, wherein the dosage ratio of sodium alginate to deionized water in the first step is 3-5 g:100mL; the dosage ratio of the hydrophobically modified hydroxyethyl cellulose to the ethanol is 1-3 g: 10-20 g; in the second step, the concentration of the ethanol solution of the dimethyldichlorosilane is 3wt%, and the weight ratio of the ethanol solution to the deionized water is 5-7: 2.
6. the calcium oxide filler for aerated bricks according to claim 1, wherein the specific surface area of the calcium oxide clinker is 350-420 m 2 Per kg, the dispersant is one or a mixture of more of sodium tripolyphosphate, polyethylene glycol, citric acid and sodium dodecyl benzene sulfonate; the hydrophobically modified hydroxyethyl cellulose has a trade name of natrosol Plus 330, a viscosity of 550 to 700cps, and a pH of 7 in aqueous solution.
7. The production process of the calcium oxide filler for the aerated bricks is characterized by comprising the following steps of:
s1, selecting and crushing: removing soil and dust on the surface of calcite with calcium carbonate content of more than or equal to 60% and whiteness of more than or equal to 93%, and crushing the calcite with a crusher until the particle size is less than or equal to 20mm to obtain a crushed material;
s2, calcining and ball-milling: adding 5-12 parts of sodium carbonate and 3-7 parts of isothiazolinone into 60-80 parts of the crushed material according to parts by weight, stirring for 20min at the rotating speed of 600-800 rpm, placing in a calcining furnace, heating to 600-650 ℃, and carrying out heat preservation and calcination for 3 hours; heating to 800-850 ℃, and calcining for 8 hours under the condition of heat preservation; heating to 1250 ℃, and carrying out heat preservation and calcination for 5 hours to obtain a calcined material; putting the calcined material into a ball mill, and performing ball milling at the rotating speed of a cylinder body of 38rpm to obtain a ball-milled material with the discharge particle size of 0.4 mm;
s3, clinker preparation: soaking the ball-milled material in 2mol/L hydrochloric acid solution, heating to 80 ℃, stirring for 1 hour, filtering, drying the filtrate at 100 ℃ to constant weight, calcining at 900 ℃ for 6 hours, and cooling to obtain calcium oxide clinker;
s4, mixing and ball milling: uniformly mixing the calcium oxide clinker, the temperature-sensitive weather-resistant polymer, the hydrophobic heat-insulating filler and the dispersant, and performing ball milling and sieving to obtain the product with the specific surface area of 300-500 m 2 Calcium oxide filling agent for aerated bricks per kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211474879.4A CN115806407B (en) | 2022-11-23 | 2022-11-23 | Calcium oxide filler for aerated brick and production process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211474879.4A CN115806407B (en) | 2022-11-23 | 2022-11-23 | Calcium oxide filler for aerated brick and production process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115806407A true CN115806407A (en) | 2023-03-17 |
| CN115806407B CN115806407B (en) | 2023-09-15 |
Family
ID=85483885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211474879.4A Active CN115806407B (en) | 2022-11-23 | 2022-11-23 | Calcium oxide filler for aerated brick and production process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115806407B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116444287A (en) * | 2023-04-19 | 2023-07-18 | 国发环保新材料(江门)有限公司 | Foamed ceramic production process and equipment |
| CN117342850A (en) * | 2023-12-06 | 2024-01-05 | 内蒙古美筑新型材料有限公司 | Special mortar for air-blast prevention and preparation method thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050034635A1 (en) * | 2003-08-13 | 2005-02-17 | Pin-Chuan Lin | Process and composition for the manufacture of cement expansion additive |
| JP2012131997A (en) * | 2010-11-30 | 2012-07-12 | Nippon Shokubai Co Ltd | Phosphorus atom-containing (poly)alkylene glycol-based polymer |
| CN104671695A (en) * | 2015-02-05 | 2015-06-03 | 江苏苏博特新材料股份有限公司 | Modified calcium oxide expansive agent used for cement concrete and preparation method thereof |
| CN104671700A (en) * | 2015-02-05 | 2015-06-03 | 江苏苏博特新材料股份有限公司 | Modified calcium oxide expansive agent used for cement concrete and preparation method thereof |
| US20150353810A1 (en) * | 2012-12-11 | 2015-12-10 | Dow Global Technologies Llc | Cementing composition comprising nonionic hydrophobically-modified cellulose ethers and its use |
| CN110028276A (en) * | 2019-04-23 | 2019-07-19 | 佛山市世为创意家具有限公司 | A kind of high-effective water-proof dustproof fiber cement plate |
| KR102038266B1 (en) * | 2019-03-11 | 2019-10-31 | 신영건설(주) | Eco-friendly mortar composition for repairing and reinforcing structures, and method of repairing and reinforcing structures using the same |
| KR102194680B1 (en) * | 2020-06-25 | 2020-12-28 | 주식회사 중앙폴리텍 | High early strength cement concrete composition for road pavement having excellent shrinkage-reducing effect and a repairing method of road pavement using the same |
| CN113698690A (en) * | 2021-08-24 | 2021-11-26 | 徐州特之达包装科技有限公司 | Sustained-release microcapsule film and preparation method thereof |
-
2022
- 2022-11-23 CN CN202211474879.4A patent/CN115806407B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050034635A1 (en) * | 2003-08-13 | 2005-02-17 | Pin-Chuan Lin | Process and composition for the manufacture of cement expansion additive |
| JP2012131997A (en) * | 2010-11-30 | 2012-07-12 | Nippon Shokubai Co Ltd | Phosphorus atom-containing (poly)alkylene glycol-based polymer |
| US20150353810A1 (en) * | 2012-12-11 | 2015-12-10 | Dow Global Technologies Llc | Cementing composition comprising nonionic hydrophobically-modified cellulose ethers and its use |
| CN104671695A (en) * | 2015-02-05 | 2015-06-03 | 江苏苏博特新材料股份有限公司 | Modified calcium oxide expansive agent used for cement concrete and preparation method thereof |
| CN104671700A (en) * | 2015-02-05 | 2015-06-03 | 江苏苏博特新材料股份有限公司 | Modified calcium oxide expansive agent used for cement concrete and preparation method thereof |
| KR102038266B1 (en) * | 2019-03-11 | 2019-10-31 | 신영건설(주) | Eco-friendly mortar composition for repairing and reinforcing structures, and method of repairing and reinforcing structures using the same |
| CN110028276A (en) * | 2019-04-23 | 2019-07-19 | 佛山市世为创意家具有限公司 | A kind of high-effective water-proof dustproof fiber cement plate |
| KR102194680B1 (en) * | 2020-06-25 | 2020-12-28 | 주식회사 중앙폴리텍 | High early strength cement concrete composition for road pavement having excellent shrinkage-reducing effect and a repairing method of road pavement using the same |
| CN113698690A (en) * | 2021-08-24 | 2021-11-26 | 徐州特之达包装科技有限公司 | Sustained-release microcapsule film and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116444287A (en) * | 2023-04-19 | 2023-07-18 | 国发环保新材料(江门)有限公司 | Foamed ceramic production process and equipment |
| CN116444287B (en) * | 2023-04-19 | 2024-05-07 | 国发环保新材料(江门)有限公司 | Foamed ceramic production process and equipment |
| CN117342850A (en) * | 2023-12-06 | 2024-01-05 | 内蒙古美筑新型材料有限公司 | Special mortar for air-blast prevention and preparation method thereof |
| CN117342850B (en) * | 2023-12-06 | 2024-01-26 | 内蒙古美筑新型材料有限公司 | Special mortar for air-blast prevention and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115806407B (en) | 2023-09-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115806407B (en) | Calcium oxide filler for aerated brick and production process thereof | |
| CN107721358B (en) | Baking-free ceramsite prepared by mixing slag micro powder with perlite tailings and preparation method of baking-free ceramsite | |
| CN111606612B (en) | Alkali-activated cementitious materials and methods of use thereof | |
| CN112979238B (en) | Low-shrinkage high-performance concrete | |
| CN111807779B (en) | High-strength waterproof soil consolidation agent | |
| CN110981369A (en) | High-performance expansive prestressed concrete and preparation method thereof | |
| CN113636781A (en) | Cement curing agent and cement curing process using same | |
| CN106082821A (en) | A kind of gangue with antimildew and antibacterial effect is non-burning brick | |
| CN113045279A (en) | Autoclaved sand-lime brick and preparation method thereof | |
| CN111978043B (en) | Self-waterproof concrete and preparation method thereof | |
| CN113667061A (en) | Water-absorbent resin and preparation method and application thereof | |
| CN110577382B (en) | C25 super slump retaining concrete | |
| CN110981271B (en) | Special composite anti-cracking agent for ultra-high performance concrete | |
| CN116835949A (en) | High-doping-amount and high-strength electrolytic manganese slag-based environment-friendly baking-free brick and preparation method thereof | |
| CN115432979A (en) | Large-section tunnel secondary lining self-compacting concrete used in water-rich environment | |
| CN113233850B (en) | Modified concrete and preparation method thereof | |
| CN114853433A (en) | Fluorgypsum composite cementing material and preparation method thereof | |
| CN108689652B (en) | Anti-seepage plastic concrete and preparation method thereof | |
| CN114573286A (en) | Durable and stable steel slag cement concrete and preparation process thereof | |
| CN114085055A (en) | Secondary lining concrete suitable for high-ground-temperature tunnel in high-temperature low-humidity environment and preparation method thereof | |
| CN107021782A (en) | A kind of high-strength light hollow brick and its preparation technology | |
| CN113292268A (en) | Additive for lightweight concrete plate, concrete and preparation method of lightweight concrete plate | |
| CN107793061B (en) | Modified blast furnace slag material and preparation process thereof | |
| CN113429134A (en) | Method for adjusting fluidity and setting time of chemically-activated cementing material system | |
| CN112456861A (en) | Preparation method of concrete waterproof compacting agent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A calcium oxide filler for aerated bricks and its production process Granted publication date: 20230915 Pledgee: Hangzhou Fuyang sub branch of China Everbright Bank Co.,Ltd. Pledgor: Zhejiang Zhenxin New Material Technology Co.,Ltd. Registration number: Y2024980009506 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |