CN116178970A - Polyurethane modified asphalt and preparation method thereof - Google Patents
Polyurethane modified asphalt and preparation method thereof Download PDFInfo
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- CN116178970A CN116178970A CN202111419785.2A CN202111419785A CN116178970A CN 116178970 A CN116178970 A CN 116178970A CN 202111419785 A CN202111419785 A CN 202111419785A CN 116178970 A CN116178970 A CN 116178970A
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- 239000010426 asphalt Substances 0.000 title claims abstract description 82
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 28
- 239000004814 polyurethane Substances 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000003756 stirring Methods 0.000 claims abstract description 27
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 24
- 239000012948 isocyanate Substances 0.000 claims abstract description 21
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003960 organic solvent Substances 0.000 claims abstract description 10
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000725 suspension Substances 0.000 claims abstract description 5
- 239000012975 dibutyltin dilaurate Substances 0.000 claims abstract description 3
- 238000001035 drying Methods 0.000 claims abstract description 3
- 239000002808 molecular sieve Substances 0.000 claims abstract description 3
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims abstract description 3
- 238000001291 vacuum drying Methods 0.000 claims abstract description 3
- 239000003208 petroleum Substances 0.000 claims description 20
- 229920001730 Moisture cure polyurethane Polymers 0.000 claims description 16
- 238000010008 shearing Methods 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 10
- 230000002745 absorbent Effects 0.000 claims description 8
- 239000002250 absorbent Substances 0.000 claims description 8
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 claims description 8
- 239000003085 diluting agent Substances 0.000 claims description 8
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000005056 polyisocyanate Substances 0.000 claims description 6
- 229920001228 polyisocyanate Polymers 0.000 claims description 6
- 150000003949 imides Chemical class 0.000 claims description 5
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical group O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 5
- -1 polyoxypropylene Polymers 0.000 claims description 5
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 4
- 239000000920 calcium hydroxide Substances 0.000 claims description 4
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical group [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000292 calcium oxide Substances 0.000 claims description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 claims description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 3
- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-UHFFFAOYSA-N 0.000 claims description 2
- SBJCUZQNHOLYMD-UHFFFAOYSA-N 1,5-Naphthalene diisocyanate Chemical compound C1=CC=C2C(N=C=O)=CC=CC2=C1N=C=O SBJCUZQNHOLYMD-UHFFFAOYSA-N 0.000 claims description 2
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 2
- 239000002202 Polyethylene glycol Substances 0.000 claims description 2
- 238000012644 addition polymerization Methods 0.000 claims description 2
- 239000007795 chemical reaction product Substances 0.000 claims description 2
- 239000003245 coal Substances 0.000 claims description 2
- 230000029087 digestion Effects 0.000 claims description 2
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 2
- 238000002955 isolation Methods 0.000 claims description 2
- 229920001223 polyethylene glycol Polymers 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 229920006389 polyphenyl polymer Polymers 0.000 claims description 2
- 229920001451 polypropylene glycol Polymers 0.000 claims description 2
- 239000011541 reaction mixture Substances 0.000 claims description 2
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 2
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 2
- 238000002604 ultrasonography Methods 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 150000005846 sugar alcohols Polymers 0.000 claims 5
- DAJSVUQLFFJUSX-UHFFFAOYSA-M sodium;dodecane-1-sulfonate Chemical compound [Na+].CCCCCCCCCCCCS([O-])(=O)=O DAJSVUQLFFJUSX-UHFFFAOYSA-M 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 3
- 239000004593 Epoxy Substances 0.000 description 14
- 229920005862 polyol Polymers 0.000 description 5
- 150000003077 polyols Chemical class 0.000 description 4
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 239000011384 asphalt concrete Substances 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 238000007385 chemical modification Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2206—Oxides; Hydroxides of metals of calcium, strontium or barium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The application relates to the technical field of asphalt and discloses polyurethane modified asphalt and a preparation method thereof, wherein graphene oxide GO is subjected to vacuum drying treatment, and an organic solvent DMF and acetone are put into a dried molecular sieve for water removal treatment; the mol ratio of the graphene oxide to the graphene oxide is 25-35: 1, heating isocyanate and sufficient organic solvent DMF; the graphene oxide GO suspension is dropwise added into the isocyanate solution, and 3-4 drops of dibutyl tin dilaurate DBTDL are added for stirring and drying, so that the asphalt has the advantages of good mechanical property, durability and fatigue resistance, strong low-temperature crack resistance and long construction operability under a high-temperature environment.
Description
Technical Field
The invention relates to the technical field of asphalt, in particular to polyurethane modified asphalt and a preparation method thereof.
Background
At present, the steel bridge deck pavement materials are more in variety, wherein epoxy asphalt is more in application in recent years due to the characteristics of excellent mechanical property, strong high-temperature rutting resistance and the like, and the existing 150 bridges in China are paved by the epoxy asphalt. The epoxy asphalt is formed by mixing epoxy resin, a curing agent and matrix asphalt according to a certain proportion, belongs to a chemical modification system, forms an insoluble and infusible three-dimensional network structure after chemical crosslinking, uses epoxy as a continuous phase and uses asphalt as a disperse phase, thereby greatly improving the mechanical property of the modified asphalt. However, the epoxy asphalt is more compact in crosslinking at a higher temperature in the using stage, the strength and the modulus of the formed cured product are higher, the brittleness is increased, the low-temperature flexibility of the epoxy asphalt is reduced to a certain extent under the low-temperature condition, particularly in northern areas of China, the early cracking of the mixture is easy to cause, the comprehensive performance of the epoxy asphalt is attenuated, and the low-temperature performance of the epoxy asphalt is not improved better at present. Therefore, the development of a novel material which not only can give consideration to the high-temperature performance advantage of the epoxy asphalt, but also can make up for the deficiency of the low-temperature performance of the epoxy asphalt is very necessary.
Disclosure of Invention
The invention aims to provide polyurethane modified asphalt and a preparation method thereof, which are used for solving the problems of poor mechanical property, durability and fatigue resistance of asphalt, insufficient low-temperature crack resistance and short construction operability time in a high-temperature environment.
In order to achieve the above object, the present invention provides a method for preparing polyurethane modified asphalt, which is characterized by comprising the following steps;
step 1, heating a polyurethane prepolymer at 100-120 ℃ for 6-8 min, adding a proper amount of isocyanate to covalently modify graphene oxide GO, and fully and uniformly mixing after ultrasonic dispersion for 1 h;
step 2, adding CO in turn 2 Uniformly stirring the absorbent and the diluent for 3-5 min;
step 3, heating the road petroleum asphalt to a flowing state at 135 ℃ and fully stirring, and then adding a compatilizer to continuously and fully stir so as to uniformly mix the road petroleum asphalt;
step 4, finally, CO is contained 2 Adding an absorbent, isocyanate covalent modified graphene oxide GO and a polyurethane prepolymer of a diluent into petroleum asphalt containing a compatilizer, shearing and stirring at 170 ℃ at a high temperature, wherein the shearing rate is 2000r/min, the shearing and stirring time is 10-15 min, and curing the polyurethane prepolymer at normal temperature for 5-7 days to form the final strength after uniform stirring
Further, the preparation method of the isocyanate covalent modified graphene oxide GO comprises the following steps:
step 1, firstly, carrying out vacuum drying treatment on graphene oxide GO, and putting an organic solvent DMF and acetone into a dried molecular sieve for water removal treatment;
step 2, a proper amount of graphene oxide GO and an organic solvent DMF are taken to be filled into a digestion tube, and after airtight treatment and air isolation, the graphene oxide GO and the organic solvent DMF are dispersed for 1 hour under the action of ultrasound to form graphene suspension for later use;
step 3, the mol ratio of the graphene oxide to the graphene oxide is 25-35: 1, placing isocyanate and a sufficient amount of organic solvent DMF into a three-port flat-bottomed flask, and placing the flask in a magnetic stirrer for stirring and heating to 75 ℃;
step 4, adding graphene oxide GO suspension dropwise into isocyanate solution, adding 3-4 drops of dibutyl tin dilaurate DBTDL, continuously stirring at 75 ℃ for reaction for 9 hours, and repeatedly washing a reaction mixture with DMF and acetone to remove unreacted isocyanate prepolymer after the reaction is completed;
and 5, finally, placing the reaction product in a vacuum oven, and drying for 6 hours at the temperature of 60 ℃ to obtain the graphene oxide GO covalently modified by isocyanate.
Preferably, the dispersibility and the final product performance of the isocyanate covalent modified graphene oxide GO in polyurethane asphalt are further improved, and the isocyanate is one or any combination of more of 4,4' -diphenylmethane diisocyanate MDI, 2, 4-toluene diisocyanate TDI and 1, 5-naphthalene diisocyanate NDI.
Preferably, the raw material components are calculated according to the weight portion: 50-55% of road petroleum asphalt, 45-50% of polyurethane prepolymer and CO 2 1.5 to 3 percent of absorbent, 0.5 to 1 percent of compatilizer, 3 to 5 percent of diluent and 0.1 to 0.8 percent of graphene oxide GO covalently modified by isocyanate.
Preferably, the road petroleum asphalt is one or any combination of a plurality of 70# petroleum asphalt, 90# petroleum asphalt, lake asphalt and coal asphalt.
Further, the polyurethane prepolymer is a macromolecular single-component polyurethane prepared by addition polymerization of a polyol and a polyisocyanate, wherein the polyol is one or more selected from polyoxypropylene ether polyol, polyethylene glycol, graft modified polymer polyol and PHD polyol, and the polyisocyanate is one or more selected from diphenylmethane diisocyanate, xylylene diisocyanate, hexamethylene diisocyanate and polymethylene polyphenyl polyisocyanate.
Preferably, CO 2 The absorbent is one or more of calcium oxide, sodium dodecyl sulfate and calcium hydroxide.
The compatilizer is maleic anhydride or imide type compatilizer.
The diluent is one or more of C12-14 alcohol glycidyl ether, dioctyl phthalate and dibutyl phthalate.
The beneficial effects are that: the polyurethane modified asphalt prepared by the invention has long construction operability time, the viscosity is slowly increased along with time at 170 ℃, and when the viscosity reaches a critical value of 1Pa.s, the system reaction time can reach 3-4 h.
The polyurethane modified asphalt prepared by the invention has better compatibility, and the three-dimensional network structure of the cured modified asphalt system is obvious (shown in figure 1) through observation of a fluorescence microscope, so that the polyurethane phase has better continuity and the asphalt phase is dispersed uniformly.
The polyurethane modified asphalt prepared by the method has strong elastic deformation capability after solidification, has excellent low-temperature flexibility, chemical corrosion resistance and ageing resistance, and can remove free water and bound water in stones at a higher mixing temperature (160-170 ℃), so that the polyurethane modified asphalt mixture is ensured to have stable performance, and can prevent water infiltration, so that the paving layer and the bridge integral structure have better durability.
Compared with the epoxy asphalt in the prior art, the elongation at break of the polyurethane modified asphalt provided by the invention is improved by 260%, the bending strain at-10 ℃ is improved by 190%, the Marshall stability reaches 60KN, and the dynamic stability at 60 ℃ is about 40000 times/mm; compared with the common asphalt mixture, the asphalt mixture has very obvious performance advantages, and can obviously improve the durability of the pavement of the steel bridge deck.
Drawings
FIG. 1 is a three-dimensional network of polyurethane modified asphalt;
FIG. 2 is a graph showing the viscosity of the modified asphalt at 170℃as a function of time.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings, but the present invention is not limited to these embodiments, and modifications made to the present invention without departing from the principle of the present invention fall within the scope of protection of the claims of the present invention.
Example 1
Heating 45 parts of polyurethane prepolymer at 120 ℃ for 8min, and then adding 1.5 parts of sodium dodecyl sulfate and 4 parts of C12-14 alcohol glycidyl ether in sequence to stir for 5min to obtain a component A; 55 parts of road petroleum asphalt is heated to 135 ℃, then 0.7 part of maleic anhydride is added and stirred uniformly to form a component B, and finally A, B component is sheared for 15min at 170 ℃ by a high-speed shearing machine at 2000r/min, so as to prepare the polyurethane modified asphalt.
Example 2
Heating 46 parts of polyurethane prepolymer at 120 ℃ for 8min, and then adding 1.8 parts of sodium dodecyl sulfate and 4 parts of C12-14 alcohol glycidyl ether in sequence to stir for 5min to obtain a component A; heating 54 parts of road petroleum asphalt to 135 ℃, adding 0.7 part of maleic anhydride, stirring uniformly to obtain a component B, shearing A, B components at 170 ℃ for 15min by using a high-speed shearing machine at 2000r/min to obtain polyurethane modified asphalt, and curing for 6 days under normal temperature conditions to obtain the final strength.
Example 3
Heating 47 parts of polyurethane prepolymer at 120 ℃ for 8min, and then adding 2.1 parts of calcium hydroxide and 4 parts of dioctyl phthalate in sequence to stir for 5min to obtain a component A; 53 parts of road petroleum asphalt is heated to 135 ℃, then 0.7 part of maleic anhydride is added and stirred uniformly to form a component B, and finally A, B components are sheared for 15min at 170 ℃ by a high-speed shearing machine at the speed of 2000r/min, so that polyurethane modified asphalt is prepared, and the polyurethane modified asphalt is cured for 6 days under the normal temperature condition to form the final strength.
Example 4
Heating 48 parts of polyurethane prepolymer at 120 ℃ for 8min, and then adding 2.4 parts of calcium hydroxide and 4 parts of dioctyl phthalate in sequence to stir for 5min to obtain a component A; heating 52 parts of road petroleum asphalt to 135 ℃, adding 0.7 part of imide type compatilizer, stirring uniformly to obtain a component B, shearing A, B component at 170 ℃ for 15min at the speed of 2000r/min by a high-speed shearing machine to obtain polyurethane modified asphalt, and curing for 6 days at normal temperature to obtain the final strength.
Example 5
Heating 49 parts of polyurethane prepolymer at 120 ℃ for 8min, then adding 2.7 parts of calcium oxide and 4 parts of dibutyl phthalate in sequence, and stirring for 5min to obtain a component A; heating 51 parts of road petroleum asphalt to 135 ℃, adding 0.7 part of imide type compatilizer, stirring uniformly to obtain a component B, shearing A, B component at 170 ℃ for 15min by using a high-speed shearing machine at 2000r/min to obtain polyurethane modified asphalt, and curing for 6 days under normal temperature conditions to obtain the final strength.
Example 6
Heating 50 parts of polyurethane prepolymer at 120 ℃ for 8min, and then adding 3.0 parts of calcium oxide and 4 parts of dibutyl phthalate in sequence to stir for 5min to obtain a component A; heating 50 parts of road petroleum asphalt to 135 ℃, adding 0.7 part of imide type compatilizer, stirring uniformly to obtain a component B, shearing A, B component at 170 ℃ for 15min at the speed of 2000r/min by a high-speed shearing machine to obtain polyurethane modified asphalt, and curing for 6 days at normal temperature to obtain the final strength.
Comparative example
The polyurethane modified asphalt is compared with high-temperature epoxy asphalt, and mainly subjected to a tensile test and a Brookfield rotational viscosity test, and the test results are shown in Table 1 and FIG. 2.
TABLE 1 tensile test results
Example 7
Mixing the polyurethane modified asphalt and aggregate at 170 ℃, grading by using epoxy asphalt mixture, grading EA-10, wherein the oil-stone ratio is 6.7%, and forming a Marshall test piece, a low Wen Xiaoliang bending test piece and a high-temperature rutting plate after mixing for 3-5 min. After curing, performance is tested according to standard Highway engineering asphalt and asphalt mixture test procedure (JTJ E20-2011), and performance comparison is carried out on the mixture and high-temperature epoxy asphalt concrete, and test results are shown in Table 2.
Table 2 test results of polyurethane modified asphalt mixtures
Claims (9)
1. A polyurethane modified asphalt and a preparation method thereof are characterized by comprising the following steps of;
step 1, heating a polyurethane prepolymer at 100-120 ℃ for 6-8 min, adding a proper amount of isocyanate to covalently modify graphene oxide GO, and fully and uniformly mixing after ultrasonic dispersion for 1 h;
step 2, adding CO in turn 2 Uniformly stirring the absorbent and the diluent for 3-5 min;
step 3, heating the road petroleum asphalt to a flowing state at 135 ℃ and fully stirring, and then adding a compatilizer to continuously and fully stir so as to uniformly mix the road petroleum asphalt;
step 4, finally, CO is contained 2 The polyurethane prepolymer of the absorbent, the isocyanate covalent modified graphene oxide GO and the diluent is added into petroleum asphalt containing a compatilizer and subjected to high-temperature shearing stirring at 170 ℃, the shearing rate is 2000r/min, the shearing stirring time is 10-15 min, and after uniform stirring, the polyurethane prepolymer is cured for 5-7 days at normal temperature to form the final strength.
2. The polyurethane modified asphalt and the preparation method thereof according to claim 1, wherein the preparation method of the isocyanate covalent modified graphene oxide GO is as follows:
step 1, firstly, carrying out vacuum drying treatment on graphene oxide GO, and putting an organic solvent DMF and acetone into a dried molecular sieve for water removal treatment;
step 2, a proper amount of graphene oxide GO and an organic solvent DMF are taken to be filled into a digestion tube, and after airtight treatment and air isolation, the graphene oxide GO and the organic solvent DMF are dispersed for 1 hour under the action of ultrasound to form graphene suspension for later use;
step 3, the mol ratio of the graphene oxide to the graphene oxide is 25-35: 1, placing isocyanate and a sufficient amount of organic solvent DMF into a three-port flat-bottomed flask, and placing the flask in a magnetic stirrer for stirring and heating to 75 ℃;
step 4, adding graphene oxide GO suspension dropwise into isocyanate solution, adding 3-4 drops of dibutyl tin dilaurate DBTDL, continuously stirring at 75 ℃ for reaction for 9 hours, and repeatedly washing a reaction mixture with DMF and acetone to remove unreacted isocyanate prepolymer after the reaction is completed;
and 5, finally, placing the reaction product in a vacuum oven, and drying for 6 hours at the temperature of 60 ℃ to obtain the graphene oxide GO covalently modified by isocyanate.
3. The polyurethane-modified asphalt and the preparation method thereof according to claim 2, wherein: the isocyanate is one or more of 4,4' -diphenylmethane diisocyanate MDI, 2, 4-toluene diisocyanate TDI and 1, 5-naphthalene diisocyanate NDI.
4. The polyurethane-modified asphalt according to claim 1, 2 or 3, and the preparation method thereof, characterized in that: 50-55% of road petroleum asphalt, 45-50% of polyurethane prepolymer and CO 2 1.5 to 3 percent of absorbent, 0.5 to 1 percent of compatilizer, 3 to 5 percent of diluent and 0.1 to 0.8 percent of graphene oxide GO covalently modified by isocyanate.
5. The polyurethane-modified asphalt and the preparation method thereof according to claim 4, wherein: the road petroleum asphalt is one or more of 70# petroleum asphalt, 90# petroleum asphalt, lake asphalt and coal asphalt.
6. The polyurethane-modified asphalt and the preparation method thereof according to claim 5, wherein: the polyurethane prepolymer is macromolecular single-component polyurethane, and is prepared by addition polymerization of polyalcohol and polyisocyanate, wherein the polyalcohol is selected from one or more of polyoxypropylene ether polyalcohol, polyethylene glycol, graft modified polymer polyalcohol and PHD polyalcohol, and the polyisocyanate is selected from one or more of diphenylmethane diisocyanate, xylylene diisocyanate, hexamethylene diisocyanate and polymethylene polyphenyl polyisocyanate.
7. The polyurethane-modified asphalt according to claim 1, 2,4, 5 or 6, and the preparation method thereof, characterized in that: CO 2 The absorbent is calcium oxide and dodecylSodium sulfonate, calcium hydroxide, or any combination thereof.
8. The polyurethane-modified asphalt and the preparation method thereof according to claim 7, wherein: the compatilizer is maleic anhydride or imide type compatilizer.
9. The polyurethane-modified asphalt and the preparation method thereof according to claim 8, wherein: the diluent is one or more of C12-14 alcohol glycidyl ether, dioctyl phthalate and dibutyl phthalate.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103834185A (en) * | 2014-02-26 | 2014-06-04 | 西安理工大学 | Polyurethane/nano-composite modified asphalt and preparation method thereof |
| CN110724465A (en) * | 2019-10-29 | 2020-01-24 | 寿光市众盈防水科技有限公司 | Reactive high-molecular self-adhesive waterproof coiled material and preparation method thereof |
| CN110903665A (en) * | 2019-12-13 | 2020-03-24 | 西安建筑科技大学 | Double-component polyurethane modified asphalt and preparation method thereof |
| CN110950564A (en) * | 2019-12-16 | 2020-04-03 | 长安大学 | Phase change aggregate for self-sensing and self-cooling of asphalt pavement and preparation method thereof |
| CN110964174A (en) * | 2019-12-16 | 2020-04-07 | 长安大学 | Solid-solid phase change material for actively cooling asphalt pavement, preparation method and application |
| CN112480695A (en) * | 2020-11-06 | 2021-03-12 | 安徽工业大学 | Preparation method of graphene modified asphalt and product thereof |
-
2021
- 2021-11-26 CN CN202111419785.2A patent/CN116178970B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103834185A (en) * | 2014-02-26 | 2014-06-04 | 西安理工大学 | Polyurethane/nano-composite modified asphalt and preparation method thereof |
| CN110724465A (en) * | 2019-10-29 | 2020-01-24 | 寿光市众盈防水科技有限公司 | Reactive high-molecular self-adhesive waterproof coiled material and preparation method thereof |
| CN110903665A (en) * | 2019-12-13 | 2020-03-24 | 西安建筑科技大学 | Double-component polyurethane modified asphalt and preparation method thereof |
| CN110950564A (en) * | 2019-12-16 | 2020-04-03 | 长安大学 | Phase change aggregate for self-sensing and self-cooling of asphalt pavement and preparation method thereof |
| CN110964174A (en) * | 2019-12-16 | 2020-04-07 | 长安大学 | Solid-solid phase change material for actively cooling asphalt pavement, preparation method and application |
| CN112480695A (en) * | 2020-11-06 | 2021-03-12 | 安徽工业大学 | Preparation method of graphene modified asphalt and product thereof |
Non-Patent Citations (3)
| Title |
|---|
| RUIEN YU: "Polyurethane/graphene oxide nanocomposite and its modified asphalt binder: Preparation, properties and molecular dynamics simulation", MATERIALS & DESIGN, 21 July 2021 (2021-07-21), pages 109994 * |
| 于瑞恩: "氧化石墨烯/聚氨酯复配改性沥青 混合料的性能和机理", 科学技术与工程, vol. 18, no. 33, 30 November 2018 (2018-11-30), pages 5 - 8 * |
| 金鑫: "聚氨酯改性沥青研究现状及发展趋势", 材料导报, vol. 33, no. 11, 30 November 2019 (2019-11-30), pages 3686 - 3694 * |
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