CN108752944B - Graphite-phase carbon nitride modified emulsified asphalt and photocatalytic application thereof - Google Patents
Graphite-phase carbon nitride modified emulsified asphalt and photocatalytic application thereof Download PDFInfo
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- CN108752944B CN108752944B CN201810495391.7A CN201810495391A CN108752944B CN 108752944 B CN108752944 B CN 108752944B CN 201810495391 A CN201810495391 A CN 201810495391A CN 108752944 B CN108752944 B CN 108752944B
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- 239000010426 asphalt Substances 0.000 title claims abstract description 59
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 230000001699 photocatalysis Effects 0.000 title description 15
- 239000010439 graphite Substances 0.000 claims abstract description 19
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229920000642 polymer Polymers 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000010008 shearing Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- XZMCDFZZKTWFGF-UHFFFAOYSA-N Cyanamide Chemical compound NC#N XZMCDFZZKTWFGF-UHFFFAOYSA-N 0.000 claims description 5
- 229920000877 Melamine resin Polymers 0.000 claims description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 5
- 239000004202 carbamide Substances 0.000 claims description 5
- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 claims description 5
- 239000000839 emulsion Substances 0.000 claims description 5
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 3
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229910052573 porcelain Inorganic materials 0.000 claims description 3
- 229920002125 Sokalan® Polymers 0.000 claims description 2
- 239000004584 polyacrylic acid Substances 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 239000003344 environmental pollutant Substances 0.000 abstract description 5
- 231100000719 pollutant Toxicity 0.000 abstract description 5
- 238000013033 photocatalytic degradation reaction Methods 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 229910052755 nonmetal Inorganic materials 0.000 description 5
- 239000003607 modifier Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007146 photocatalysis Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920002367 Polyisobutene Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012719 thermal polymerization Methods 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/24—Nitrogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Catalysts (AREA)
Abstract
The invention discloses graphite phase carbon nitride modified emulsified asphalt, which comprises the following components in parts by weight: 100 parts of emulsified asphalt, 5-10 parts of graphite-phase carbon nitride and 2-6 parts of water-based polymer; the graphite-phase carbon nitride is dispersed in an aqueous polymer and then uniformly mixed with emulsified asphalt in a high-speed shearing machine to prepare the graphite-phase carbon nitride emulsified asphalt. The invention also discloses application of the graphite-phase carbon nitride modified emulsified asphalt in preparing cementing materials of highway thin-layer cover surfaces and fog sealing layers for real-time photocatalytic degradation of harmful pollutants in tail gas under light irradiation.
Description
Technical Field
The invention relates to functional emulsified asphalt, in particular to graphite-phase carbon nitride modified emulsified asphalt and photocatalytic application thereof.
Background
Emulsified asphalt is a uniform, stable emulsion formed by heating viscous asphalt to a fluid state and then forming microdroplets dispersed in water with an emulsifier-stabilizer under the action of mechanical force. In order to further improve the performance of the emulsified asphalt, various modifiers are tried to modify the emulsified asphalt, and the characteristics of the emulsified asphalt and the modifier are compatible, so that the pavement performance is improved. For example, polymer elastomers such as SBS, SBR latex and natural rubber modified emulsified asphalt, and polymer elastomers such as EVA, polyisobutylene, polyethylene and polypropylene modified emulsified asphalt greatly improve the application performance of the emulsified asphalt.
Different modifiers are selected to produce specific modified emulsified asphalt which is applied to special environment, so that the severe natural environment is overcome, and other properties of the emulsified asphalt can meet the use requirements, so that various properties of the material are fully utilized.
The application range of the emulsified asphalt is continuously widened, and the emulsified asphalt becomes the front line of the development of the emulsified asphalt material. However, a large amount of patent and literature data are searched, and a patent that the application of the nonmetal semiconductor graphite phase carbon nitride photocatalytic material modified emulsified asphalt and the product thereof as a cementing material of a thin-layer cover coat and a fog seal layer in pavement engineering to realize real-time photocatalytic degradation of harmful pollutants in tail gas under solar irradiation is not reported yet.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide graphite-phase carbon nitride modified emulsified asphalt and photocatalytic application thereof.
The graphite phase carbon nitride modified emulsified asphalt is characterized in that: the modified emulsified asphalt comprises the following components in parts by weight: 100 parts of emulsified asphalt, 5-10 parts of graphite-phase carbon nitride and 2-6 parts of water-based polymer; wherein the particle size of the graphite phase carbon nitride is 300 nm-500 nm.
Wherein: the modified emulsified asphalt preferably comprises the following components in parts by weight: 100 parts of emulsified asphalt, 8-10 parts of graphite phase carbon nitride and 4-6 parts of water-based polymer.
The most preferred embodiments are: the modified emulsified asphalt comprises the following components in parts by weight: 100 parts of emulsified asphalt, 9 parts of graphite-phase carbon nitride and 6 parts of water-based polymer.
In the above-mentioned graphite phase carbon nitride modified emulsified asphalt, the graphite phase carbon nitride is preferably prepared by the following method: weighing urea, cyanamide, dicyandiamide and melamine according to the weight ratio of 1:1:1:1, respectively placing the weighed materials in 4 porcelain crucibles with covers and in a muffle furnace at the same time, setting the heating rate to be 10 ℃/min, heating to 550 ℃, and preserving heat for 2 h; grinding the collected product when the furnace is cooled to room temperature to obtain graphite-phase carbon nitride with the particle size of 300-500 nm; the aqueous polymer is preferably a polyacrylic acid emulsion.
The preparation method of the graphite phase carbon nitride modified emulsified asphalt comprises the following steps:
(a) according to the weight parts of the component contents, graphite phase carbon nitride is uniformly dispersed in aqueous polymer solution under the action of ultrasonic waves;
(b) and (b) uniformly stirring the graphite-phase carbon nitride/water-based polymer obtained in the step (a) and the emulsified asphalt through a high-speed shearing machine to obtain the graphite-phase carbon nitride modified emulsified asphalt.
The invention relates to application of graphite-phase carbon nitride modified emulsified asphalt in preparing cementing materials of road thin-layer cover surfaces and fog seal layers for real-time photocatalytic degradation of harmful pollutants in tail gas under light irradiation.
The non-metal semiconductor material-graphite phase carbon nitride is added into the emulsified asphalt component, so that the emulsified asphalt has the photocatalysis function of absorbing visible light, can catalytically remove organic pollutants attached to the surface and pollutants such as nitrogen oxides, carbon hydride, carbon monoxide and the like in tail gas, and has the function of purifying the atmosphere.
The invention discloses a photocatalytic application of modified emulsified asphalt, which utilizes the photocatalytic effect of absorbing visible light of a graphite-phase carbon nitride photocatalytic material added in the emulsified asphalt to realize the function of purifying tail gas pollutants by utilizing solar energy catalysis and can be used in the fields of high-grade highways, municipal roads and the like.
Compared with the prior art, the invention has the following technical effects:
(1) compared with the prior art, the nonmetal semiconductor graphite phase carbon nitride photocatalytic material adopted by the invention has a moderate band gap, the band gap is 2.7-2.8 eV, and the nonmetal semiconductor graphite phase carbon nitride photocatalytic material can absorb visible light with the wavelength of 450-460 nm. Compared with the traditional metal semiconductor material, the cost is relatively low, no toxic substance is released in the catalytic reaction process, and the environment is friendly.
(2) The invention adopts the non-metal semiconductor graphite phase carbon nitride which is formed by C-N bonds, has good compatibility with organic matters in the asphalt and can be uniformly dispersed in the asphalt, thereby being beneficial to realizing the photocatalysis function.
(3) The graphite-phase carbon nitride can be obtained by the thermal polymerization reaction of urea, cyanamide, dicyandiamide and melamine, the synthesis raw materials are low in cost, and the process is simple and easy to operate, so that the modified emulsified asphalt containing the graphite-phase carbon nitride and having photocatalytic performance can be used as a novel pavement asphalt new material.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the scope of the present invention is not limited thereto. Furthermore, it should be understood that various changes and modifications can be made by one skilled in the art after reading the teachings of the present invention, and equivalents may be made thereto without departing from the scope of the invention defined by the claims.
Example 1
Graphite phase carbon nitride (g-C)3N4) Preparation of the photocatalyst
(1) 10g of urea, cyanamide, dicyandiamide and melamine are weighed respectively and placed in 450 ml porcelain crucibles with covers respectively. And meanwhile, placing the mixture in a muffle furnace, setting the heating rate to be 10 ℃/min, heating to 550 ℃, and preserving heat for 2 h.
(2) Grinding the collected product when the furnace is cooled to room temperature to obtain graphite-phase carbon nitride with the particle size of 300-500 nm for later use.
Example 2
Preparation of graphite phase carbon nitride modified emulsified asphalt
(Kg) in parts by weight: 100 parts of emulsified asphalt, 9 parts of graphite-phase carbon nitride and 6 parts of water-based polymer (wherein the water-based polymer adopts polyacrylic emulsion).
(a) Uniformly dispersing graphite-phase carbon nitride in the aqueous polymer solution under the action of ultrasonic waves according to the parts by weight;
(b) and (b) uniformly stirring the graphite-phase carbon nitride/water-based polymer obtained in the step (a) and the emulsified asphalt through a high-speed shearing machine to obtain the graphite-phase carbon nitride modified emulsified asphalt.
Example 3
g-C obtained by the method of example 13N4The modified emulsified asphalt is prepared by mixing the raw materials with emulsified asphalt and a water-soluble polymer, and uniformly stirring and mixing the mixture by a high-speed shearing machine. Specific raw material proportion and utilized milkThe automobile exhaust degradation effect of the thin-layer overlay prepared by melting asphalt is shown in table 1.
Table 1: photocatalytic efficiency of modified emulsified asphalt with different proportions
The modified emulsified asphalt provided by the invention can effectively utilize visible light, has a good photocatalytic effect, can effectively degrade nitrogen oxides and hydrocarbons in tail gas, and is simple and convenient in preparation method. The prepared modified emulsified asphalt can be used as cementing material for thin-layer cover, micro-surface and fog sealing layer.
The above description is only exemplary of the present invention. It is apparent that the present invention is not limited to the above embodiment examples, and any modifications and changes made to the present invention within the spirit of the present invention and the scope of the claims should be construed as the scope of the present invention.
Claims (1)
1. A graphite phase carbon nitride modified emulsified asphalt is prepared by the following method:
(a) according to the weight parts of the component contents, graphite phase carbon nitride is uniformly dispersed in aqueous polymer solution under the action of ultrasonic waves;
(b) stirring and uniformly mixing the graphite-phase carbon nitride/water-based polymer obtained in the step (a) and the emulsified asphalt through a high-speed shearing machine to obtain graphite-phase carbon nitride modified emulsified asphalt;
wherein the graphite phase carbon nitride is prepared by the following method: weighing urea, cyanamide, dicyandiamide and melamine according to the weight ratio, respectively placing the weighed materials in 4 porcelain crucibles with covers and in a muffle furnace at the same time, setting the heating rate to be 10 ℃/min, heating to 550 ℃, and keeping the temperature for 2 h; grinding the collected product when the furnace is cooled to room temperature to obtain graphite-phase carbon nitride with the particle size of 300-500 nm;
the method is characterized in that:
the water-based polymer is polyacrylic acid emulsion;
the graphite phase carbon nitride modified emulsified asphalt comprises the following components in parts by weight: 100 parts of emulsified asphalt, 9 parts of graphite-phase carbon nitride and 6 parts of polyacrylic emulsion;
in the preparation method of the graphite-phase carbon nitride, the weight ratio of urea, cyanamide, dicyandiamide to melamine is 1:1:1: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810495391.7A CN108752944B (en) | 2018-05-22 | 2018-05-22 | Graphite-phase carbon nitride modified emulsified asphalt and photocatalytic application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810495391.7A CN108752944B (en) | 2018-05-22 | 2018-05-22 | Graphite-phase carbon nitride modified emulsified asphalt and photocatalytic application thereof |
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| CN108752944A CN108752944A (en) | 2018-11-06 |
| CN108752944B true CN108752944B (en) | 2021-01-22 |
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| CN109627792B (en) * | 2018-11-30 | 2021-06-08 | 湖南鑫长胜材料科技有限公司 | Fog sealing layer material, preparation method and application |
| CN109833913B (en) * | 2019-03-14 | 2021-06-22 | 福州大学 | Photocatalytic aggregate with recycled asphalt aggregate as matrix and preparation method thereof |
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| CN106084817A (en) * | 2016-06-13 | 2016-11-09 | 山东交通学院 | A kind of asphalt material with photocatalytic degradation exhaust emission function and preparation method thereof |
| CN107118575B (en) * | 2017-04-14 | 2019-08-13 | 长安大学 | The application of azotized carbon nano piece raising pitch anti-aging property |
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Effective date of registration: 20211208 Address after: 250021 No. 7 Jiaoxiao Road, Tianqiao District, Jinan City, Shandong Province Patentee after: Jinan North traffic engineering consulting and Supervision Co.,Ltd. Address before: 250023 No. 5 Jiao Tong Road, Tianqiao District, Shandong, Ji'nan Patentee before: SHANDONG JIAOTONG University |