CN115819996A - Functionalized molybdenum disulfide and preparation method thereof, photo-thermal coating and application thereof - Google Patents
Functionalized molybdenum disulfide and preparation method thereof, photo-thermal coating and application thereof Download PDFInfo
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- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 title claims abstract description 149
- 229910052982 molybdenum disulfide Inorganic materials 0.000 title claims abstract description 138
- 238000000576 coating method Methods 0.000 title claims abstract description 71
- 239000011248 coating agent Substances 0.000 title claims abstract description 70
- 238000002360 preparation method Methods 0.000 title claims abstract description 36
- 239000002135 nanosheet Substances 0.000 claims abstract description 24
- 239000005416 organic matter Substances 0.000 claims abstract description 17
- CWERGRDVMFNCDR-UHFFFAOYSA-N thioglycolic acid Chemical compound OC(=O)CS CWERGRDVMFNCDR-UHFFFAOYSA-N 0.000 claims abstract description 17
- UFULAYFCSOUIOV-UHFFFAOYSA-N cysteamine Chemical compound NCCS UFULAYFCSOUIOV-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229960003151 mercaptamine Drugs 0.000 claims abstract description 8
- PJUIMOJAAPLTRJ-UHFFFAOYSA-N monothioglycerol Chemical compound OCC(O)CS PJUIMOJAAPLTRJ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229940035024 thioglycerol Drugs 0.000 claims abstract description 6
- 125000003396 thiol group Chemical group [H]S* 0.000 claims abstract description 5
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 229920002635 polyurethane Polymers 0.000 claims description 26
- 239000004814 polyurethane Substances 0.000 claims description 26
- 239000000839 emulsion Substances 0.000 claims description 17
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical group [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 15
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- 239000002562 thickening agent Substances 0.000 claims description 15
- 239000011230 binding agent Substances 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 14
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 13
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 13
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 13
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 13
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 13
- 239000002270 dispersing agent Substances 0.000 claims description 13
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 13
- 239000004094 surface-active agent Substances 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 9
- 238000009210 therapy by ultrasound Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 229920003090 carboxymethyl hydroxyethyl cellulose Polymers 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 abstract description 11
- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract description 10
- 125000000524 functional group Chemical group 0.000 abstract description 8
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 abstract description 7
- 238000010612 desalination reaction Methods 0.000 abstract description 4
- 238000007306 functionalization reaction Methods 0.000 abstract description 4
- 230000004048 modification Effects 0.000 abstract description 4
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- 238000013329 compounding Methods 0.000 abstract description 3
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 9
- 239000007864 aqueous solution Substances 0.000 description 9
- 238000001704 evaporation Methods 0.000 description 9
- 230000008020 evaporation Effects 0.000 description 9
- 239000008367 deionised water Substances 0.000 description 8
- 229910021641 deionized water Inorganic materials 0.000 description 8
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- 238000001035 drying Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
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- 229920003063 hydroxymethyl cellulose Polymers 0.000 description 5
- 229940031574 hydroxymethyl cellulose Drugs 0.000 description 5
- 239000012267 brine Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000003760 magnetic stirring Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
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Images
Classifications
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/138—Water desalination using renewable energy
- Y02A20/142—Solar thermal; Photovoltaics
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/208—Off-grid powered water treatment
- Y02A20/212—Solar-powered wastewater sewage treatment, e.g. spray evaporation
Abstract
The invention provides functionalized molybdenum disulfide, a preparation method thereof, a photo-thermal coating and application thereof. The preparation method of the functionalized molybdenum disulfide comprises the following steps: reacting molybdenum disulfide nanosheets with an organic matter containing sulfydryl to obtain functionalized molybdenum disulfide; wherein the organic matter containing sulfhydryl group comprises at least one of thioglycolic acid, thioglycerol and mercaptoethylamine. According to the preparation method of the functionalized molybdenum disulfide, three functional groups of carboxyl, hydroxyl and amino are introduced on the surface of the molybdenum disulfide through functional group modification, and then the coating is prepared by compounding with organic matters, so that the photothermal application of the molybdenum disulfide is realized in a large scale at low cost; the functionalized molybdenum disulfide is simple to operate, the combination of the molybdenum disulfide and organic matters is realized, and a foundation is laid for subsequent coating; the molybdenum disulfide functionalization is combined with organic matter to prepare the coating for photo-thermal desalination, and the low-cost, green and efficient molybdenum disulfide photo-thermal application is realized.
Description
Technical Field
The invention relates to the technical field of coatings, and particularly relates to a functionalized molybdenum disulfide, a preparation method thereof, a photo-thermal coating and application thereof.
Background
The shortage of fresh water resources is one of the most challenging problems in the 21 st century, and 96.5% of water resources on the earth's surface are seawater, so seawater desalination is an ideal solution. Solar energy is used as a renewable clean energy source, and the method for generating fresh water by converting the solar energy into heat energy to heat liquid water to generate steam is a sustainable development method. In recent years, molybdenum disulfide with stable chemical properties and excellent properties due to abundant earth reserves is used as a potential functional material for solar steam generation. Bulk MoS due to quantum confinement effects 2 Peeled into a single layer of MoS 2 The nano-sheet has the advantages that the indirect band gap is gradually increased along with the reduction of the number of layers, when the number of layers is reduced to a single layer, the indirect band gap 1.2eV is converted into the direct band gap 1.9eV, the electronic property is remarkably changed, and compared with a bulk material, the near-infrared absorbance is remarkably increased, so that the efficient photo-thermal effect can be shown. However, since the molybdenum disulfide surface lacks corresponding functional groups, the recombination with organic substances is limited, and based on this, improvement is necessary.
Disclosure of Invention
In view of the above, the invention provides a functionalized molybdenum disulfide, a preparation method thereof, a photo-thermal coating and an application thereof, so as to solve or partially solve the technical problems in the prior art.
In a first aspect, the invention provides a preparation method of functionalized molybdenum disulfide, which comprises the following steps:
reacting molybdenum disulfide nanosheets with an organic matter containing sulfydryl to obtain functionalized molybdenum disulfide;
wherein the organic matter containing sulfhydryl group comprises at least one of thioglycolic acid, thioglycerol and mercaptoethylamine.
Preferably, the preparation method of the functionalized molybdenum disulfide comprises the steps of mixing molybdenum disulfide nanosheets, organic matters containing sulfydryl and water, carrying out ultrasonic treatment for 1-5 hours, then stirring for 20-30 hours, and filtering to obtain the functionalized molybdenum disulfide.
Preferably, in the preparation method of the functionalized molybdenum disulfide, the mass ratio of the molybdenum disulfide nanosheet to the organic matter containing the sulfydryl to the water is (0.05-0.2) to (0.1-15) to (5-100).
In a second aspect, the invention also provides functionalized molybdenum disulfide prepared by the preparation method.
In a third aspect, the invention also provides a photo-thermal coating, which comprises the functionalized molybdenum disulfide prepared by the preparation method or the functionalized molybdenum disulfide.
Preferably, the photothermal coating further comprises: a binder, a thickener, a dispersant and a surfactant.
Preferably, the photo-thermal coating is prepared by mixing the adhesive and the photo-thermal coating, wherein the adhesive is an aqueous polyurethane emulsion;
and/or, the thickener comprises carboxymethyl cellulose and/or hydroxyethyl cellulose;
and/or the dispersant comprises water and isopropanol;
and/or the surfactant is sodium dodecyl benzene sulfonate.
Preferably, the photo-thermal coating comprises the functionalized molybdenum disulfide, a binder, a thickening agent, a dispersing agent and a surfactant according to the mass ratio of (1-5) to (5-25) to (1-10) to (30-120) to (0.01-0.05).
In a fourth aspect, the invention further provides a preparation method of the photo-thermal coating, which comprises the following steps:
adding the functional molybdenum disulfide into the dispersing agent, adding the surfactant, stirring, adding the binder and the thickening agent, and continuously stirring to obtain the photo-thermal coating.
In a fifth aspect, the invention further provides an application of the photothermal coating or the photothermal coating prepared by the preparation method as a photothermal material.
Compared with the prior art, the preparation method of the functionalized molybdenum disulfide and the photo-thermal coating have the following beneficial effects:
according to the preparation method of the functionalized molybdenum disulfide, mercaptoacetic acid, thioglycerol, mercaptoethylamine and a molybdenum disulfide nanosheet are adopted for reaction, three functional groups of carboxyl, hydroxyl and amino are introduced to the surface of the molybdenum disulfide through functional group modification, and then the coating is prepared by compounding with an organic matter, so that the photothermal application of the molybdenum disulfide is realized in a large scale at low cost; the functionalized molybdenum disulfide is simple to operate, the combination of the molybdenum disulfide and organic matters is realized, and a foundation is laid for subsequent coating; the molybdenum disulfide functionalization is combined with organic matter to prepare the coating for photo-thermal desalination, and the low-cost, green and efficient molybdenum disulfide photo-thermal application is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is an infrared spectrum of a functionalized molybdenum disulfide prepared in examples 1 to 3 of the present invention;
FIG. 2 is a physical representation of an evaporator made of the photo-thermal coating in example 4;
FIG. 3 is a graph of the change in mass of brine over time under illumination for different evaporators;
FIG. 4 shows a view of 1KW m -2 The evaporation rates and the corresponding evaporation efficiencies of different evaporators under the light intensity;
FIG. 5 shows different evaporators at 1KW m -2 The surface temperature changes after 1h of illumination;
FIG. 6 is a functionalized molybdenum disulfide formula;
FIG. 7 shows the reaction of the functionalized molybdenum disulfide, the aqueous polyurethane, and the hydroxymethyl cellulose/hydroxyethyl cellulose.
Detailed Description
In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention, and it is obvious 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 any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The embodiment of the application provides a preparation method of functionalized molybdenum disulfide, which comprises the following steps:
reacting molybdenum disulfide nanosheets with an organic matter containing sulfydryl to obtain functionalized molybdenum disulfide;
wherein the organic matter containing sulfhydryl group comprises at least one of thioglycolic acid, thioglycerol and mercaptoethylamine.
In the above embodiment, molybdenum disulfide reacts with thioglycolic acid to obtain carboxyl-functionalized molybdenum disulfide, molybdenum disulfide reacts with thioglycerol to obtain hydroxyl-functionalized molybdenum disulfide, and molybdenum disulfide reacts with mercaptoethylamine to obtain amino-functionalized molybdenum disulfide; three functional groups of carboxyl, hydroxyl and amino are introduced on the surface of the molybdenum disulfide through functional group modification, and then the coating is prepared by compounding with organic matters, so that the photothermal application of the molybdenum disulfide is realized in a large scale at low cost; the functionalized molybdenum disulfide is simple to operate, the combination of the molybdenum disulfide and organic matters is realized, and a foundation is laid for subsequent coating; the molybdenum disulfide functionalization and organic matter are combined to prepare the coating for photo-thermal desalination, and the low-cost, green and efficient molybdenum disulfide photo-thermal application is realized.
In some embodiments, the functionalized molybdenum disulfide is obtained by mixing molybdenum disulfide nanosheets, an organic matter containing sulfydryl and water, performing ultrasonic treatment for 1-5 hours, then stirring for 20-30 hours, and filtering.
In some embodiments, the mass ratio of the molybdenum disulfide nanosheets, the organic matter containing thiol groups and water is (0.05-0.2) to (0.1-15) to (5-100).
In some embodiments, the molybdenum disulfide nanosheets can be purchased directly or prepared by conventional electrochemical liquid phase ultrasonic stripping methods, and the particle size of the molybdenum disulfide nanosheets is less than or equal to 100nm.
Based on the same inventive concept, the embodiment of the application also provides the functionalized molybdenum disulfide prepared by the preparation method.
Based on the same inventive concept, the embodiment of the application also provides a photo-thermal coating, namely the functionalized molybdenum disulfide.
In some embodiments, the photo-thermal coating further comprises: a binder, a thickener, a dispersant and a surfactant.
In some embodiments, the binder is an aqueous polyurethane emulsion;
and/or, the thickener comprises carboxymethyl cellulose and/or hydroxyethyl cellulose;
and/or the dispersing agent comprises water and isopropanol, and the mass ratio of the water to the isopropanol is (30-60) to (30-60);
and/or the surfactant is sodium dodecyl benzene sulfonate.
In some embodiments, the mass ratio of the functionalized molybdenum disulfide, the binder, the thickener, the dispersant, and the surfactant is (1-5) to (5-25) to (1-10) to (30-120) to (0.01-0.05).
Specifically, in some embodiments, the photo-thermal coating comprises the following components in parts by weight:
carboxyl functionalized molybdenum disulfide: 1-5 parts;
water: 30-60 parts;
isopropyl alcohol: 30-60 parts;
sodium dodecylbenzenesulfonate: 0.01 to 0.05 portion;
aqueous polyurethane emulsion: 5-25 parts;
hydroxyethyl cellulose: 1-5 parts.
In some embodiments, the photo-thermal coating comprises the following components in parts by weight:
hydroxyl-functionalized molybdenum disulfide: 1-5 parts;
water: 30-60 parts;
isopropyl alcohol: 30-60 parts;
sodium dodecylbenzenesulfonate: 0.01 to 0.05 portion;
aqueous polyurethane emulsion: 5-25 parts;
hydroxymethyl cellulose: 1-5 parts.
In some embodiments, the photothermal coating comprises the following components in parts by weight:
amino-functionalized molybdenum disulfide: 1-5 parts;
water: 30-60 parts;
isopropyl alcohol: 30-60 parts;
sodium dodecylbenzenesulfonate: 0.01 to 0.05 portion;
aqueous polyurethane emulsion: 5-25 parts;
hydroxymethyl cellulose: 1-5 parts.
The photo-thermal coating takes the waterborne polyurethane emulsion as a binder, the carboxymethyl cellulose and the hydroxyethyl cellulose as thickeners, meanwhile, the hydroxyl and amino functionalized molybdenum disulfide and the carboxymethyl cellulose react and are combined, and the carboxyl functionalized molybdenum disulfide and the hydroxyethyl cellulose are combined; the dispersing agent (water and isopropanol solution), the binder (aqueous polyurethane emulsion) and the thickening agent (carboxymethyl cellulose and hydroxyethyl cellulose) used in the paint are green and nontoxic, and can not bring negative influence to the environment;
specifically, the chemical formula of the functionalized molybdenum disulfide is shown in figure 6.
The chemical formula of the waterborne polyurethane is as follows:
the chemical formula of the hydroxymethyl cellulose is:
the chemical formula of hydroxyethyl cellulose is:
the reaction of the functionalized molybdenum disulfide, the aqueous polyurethane and the hydroxymethyl cellulose/hydroxyethyl cellulose is shown in figure 7.
Based on the same inventive concept, the embodiment of the application also provides a preparation method of the photo-thermal coating, which comprises the following steps:
adding the functionalized molybdenum disulfide into the dispersing agent, adding the surfactant, stirring, adding the binder and the thickening agent, and continuously stirring to obtain the photo-thermal coating.
According to the preparation method of the photo-thermal coating, the functionalized molybdenum disulfide is dispersed in isopropanol and an aqueous solution, and a surfactant sodium dodecyl benzene sulfonate is added to ensure the stability of the solution; the aqueous polyurethane emulsion is used as a binder, and the carboxymethyl cellulose and the hydroxyethyl cellulose are used as thickeners, so that the molybdenum disulfide is stably dispersed in a solution system and cannot be precipitated, the prepared coating is waterproof, and the coating cannot fall off when applied in a water environment; the molybdenum disulfide is coated on a proper base material for large-scale, low-cost and green application by coating.
Based on the same inventive concept, the embodiment of the application also provides an application of the photo-thermal coating or the photo-thermal coating prepared by the preparation method as a photo-thermal material.
Specifically, the photothermal coating is coated on polyurethane sponge to prepare a photothermal device for evaporation of saline water.
The functionalized molybdenum disulfide, the preparation method thereof, the photo-thermal coating and the application thereof are further described in the following specific examples. This section further illustrates the present disclosure in connection with specific examples, which should not be construed as limiting the invention. The technical means employed in the examples are conventional means well known to those skilled in the art, unless otherwise specified. Reagents, methods and apparatus employed in the present invention are conventional in the art unless otherwise indicated.
Example 1
The embodiment of the application provides a preparation method of functionalized molybdenum disulfide, which comprises the following steps:
s1, mixing 0.1g of molybdenum disulfide nanosheet with 10mL of thioglycolic acid, carrying out ultrasonic treatment for 2 hours, then carrying out magnetic stirring for 24 hours,filtering, washing and drying to obtain carboxyl functionalized molybdenum disulfide (COOH-MoS) 2 )。
Example 2
The embodiment of the application provides a preparation method of functionalized molybdenum disulfide, which comprises the following steps:
s1, dissolving 0.8mL of thioglycollic acid in 100mL of water, adding 0.1g of molybdenum disulfide nanosheet, performing ultrasonic treatment for 2h, magnetically stirring for 24h, filtering, washing and drying to obtain hydroxyl functionalized molybdenum disulfide (OH-MoS) 2 )。
Example 3
The embodiment of the application provides a preparation method of functionalized molybdenum disulfide, which comprises the following steps:
s1, adding 0.2g of mercaptoethylamine into 5mL of water, adding 0.1g of molybdenum disulfide nanosheet, carrying out ultrasonic treatment for 2h, then carrying out magnetic stirring for 24h, filtering, washing and drying to obtain amino functionalized molybdenum disulfide (NH) 2 -MoS 2 )。
Example 4
The embodiment of the application provides a photo-thermal coating, which comprises the following raw materials: 1g of carboxyl-functionalized molybdenum disulfide (COOH-MoS) 2 ) 25mL of isopropanol, 25mL of deionized water, 0.02g of sodium dodecyl benzene sulfonate, 15mL of aqueous polyurethane emulsion (Meclin W909579 aqueous polyurethane) and 50mL of 0.2g/L hydroxyethyl cellulose aqueous solution;
the preparation method of the carboxyl functionalized molybdenum disulfide comprises the following steps: mixing 1g of molybdenum disulfide nanosheet with 100mL of thioglycollic acid, performing ultrasonic treatment for 2h, then performing magnetic stirring for 24h, filtering, washing and drying to obtain carboxyl functionalized molybdenum disulfide (COOH-MoS) 2 )；
The preparation method of the photo-thermal coating comprises the following steps: functionalization of carboxyl groups with molybdenum disulfide (COOH-MoS) 2 ) Mixing with isopropanol and deionized water, adding sodium dodecyl benzene sulfonate, aqueous polyurethane emulsion and hydroxyethyl cellulose aqueous solution, mixing and stirring to obtain the photo-thermal coating.
Example 5
The embodiment of the application provides a photo-thermal coating, which comprises the following raw materials: 1g of hydroxy-functionalized molybdenum disulfide(OH-MoS 2 ) 25mL of isopropanol, 25mL of deionized water, 0.02g of sodium dodecyl benzene sulfonate, 15mL of aqueous polyurethane emulsion and 50mL of 0.2g/L carboxymethyl cellulose aqueous solution;
the preparation method of the hydroxyl functionalized molybdenum disulfide comprises the following steps: dissolving 8mL of thioglycollic acid in 1000mL of water, adding 1g of molybdenum disulfide nanosheet, performing ultrasonic treatment for 2h, magnetically stirring for 24h, filtering, washing and drying to obtain hydroxyl functionalized molybdenum disulfide (OH-MoS) 2 )；
The preparation method of the photo-thermal coating comprises the following steps: functionalizing hydroxyl group with molybdenum disulfide (OH-MoS) 2 ) Mixing with isopropanol and deionized water, adding sodium dodecyl benzene sulfonate, aqueous polyurethane emulsion and carboxymethyl cellulose aqueous solution, mixing and stirring to obtain the photo-thermal coating.
Example 6
The embodiment of the application provides a photo-thermal coating, which comprises the following raw materials: 1g of amino-functionalized molybdenum disulfide (NH) 2 -MoS 2 ) 25mL of isopropanol, 25mL of deionized water, 0.02g of sodium dodecyl benzene sulfonate, 15mL of aqueous polyurethane emulsion and 50mL of 0.2g/L carboxymethyl cellulose aqueous solution;
wherein the amino group is functionalized molybdenum disulfide (NH) 2 -MoS 2 ) The preparation method comprises the following steps: adding 2g of mercaptoethylamine into 50mL of water, adding 1g of molybdenum disulfide nanosheet, carrying out ultrasonic treatment for 2h, then carrying out magnetic stirring for 24h, filtering, washing and drying to obtain amino functionalized molybdenum disulfide (NH) 2 -MoS 2 )；
The preparation method of the photo-thermal coating comprises the following steps: functionalizing amino group with molybdenum disulfide (NH) 2 -MoS 2 ) Mixing with isopropanol and deionized water, adding sodium dodecyl benzene sulfonate, aqueous polyurethane emulsion and carboxymethyl cellulose aqueous solution, mixing and stirring to obtain the photo-thermal coating.
Comparative example 1
The embodiment of the application provides a photo-thermal coating, which comprises the following raw materials: 1g of molybdenum disulfide nanosheet, 25mL of isopropanol, 25mL of deionized water, 0.02g of sodium dodecyl benzene sulfonate, 15mL of aqueous polyurethane emulsion and 50mL of 0.2g/L carboxymethyl cellulose aqueous solution;
the preparation method of the photo-thermal coating comprises the following steps: mixing molybdenum disulfide, isopropanol and deionized water, adding sodium dodecyl benzene sulfonate, aqueous polyurethane emulsion and carboxymethyl cellulose aqueous solution, mixing and stirring to obtain the photo-thermal coating.
Performance testing
Carboxyl-functionalized molybdenum disulfide (COOH-MoS) prepared in examples 1 to 3 2 ) Hydroxyl-functionalized molybdenum disulfide (OH-MoS) 2 ) Amino-functionalized molybdenum disulfide (NH) 2 -MoS 2 ) And the infrared spectrum of the molybdenum disulfide nanosheet is shown in figure 1. In FIG. 1, a is molybdenum disulfide nanosheet without any treatment, and b is amino-functionalized molybdenum disulfide (NH) 2 -MoS 2 ) And c is hydroxyl functionalized molybdenum disulfide (OH-MoS) 2 ) D is carboxyl functionalized molybdenum disulfide (COOH-MoS) 2 )。
As can be seen from fig. 1, the modified molybdenum disulfide surface contains corresponding functional groups.
Coating the photothermal coating obtained in the examples 4 to 6 and the comparative example 1 on polyurethane sponge with the diameter of 4cm and the thickness of 2cm, and controlling the coating thickness to be 1cm to prepare four photothermal evaporators; in comparative example 1, the evaporator made of the photothermal coating (added with the unmodified molybdenum disulfide nanosheet) is denoted as MPPU, the evaporator made of the photothermal coating (added with the carboxyl functionalized molybdenum disulfide) in example 4 is denoted as CMPPU, the evaporator made of the photothermal coating (added with the hydroxyl functionalized molybdenum disulfide) in example 5 is denoted as OMPPU, and the evaporator made of the photothermal coating (added with the amino functionalized molybdenum disulfide) in example 6 is denoted as NMPPU.
FIG. 2 is a physical diagram of an evaporator made of the photothermal coating in example 4.
The different evaporators prepared as described above were placed in brine and used 1KW m -2 Irradiating under light intensity, and adding saline water without evaporator (no evaporator in the figure) at 1KW m -2 Irradiation under light intensity as a comparison, polyurethane sponge without photo-thermal coating applied was placed in saline and 1KW m was used -2 Irradiation under light intensity as a contrast; the photothermal evaporation effect of the different evaporators was tested, and the results are shown in fig. 3 to 5.
Fig. 3 shows the change of the quality of the brine with time, and it can be seen from fig. 3 that the change of the quality of the brine with time is gradual at the beginning, and the change of the quality of the evaporators loaded with four kinds of molybdenum disulfide is linear along with the change of the continuous irradiation water amount, and the change of the water amount of the functionalized molybdenum disulfide evaporators is larger, which probably is beneficial to photo-thermal evaporation because the modified molybdenum disulfide has better hydrophilicity, and the functionalized molybdenum disulfide is loaded more closely.
FIG. 4 shows the measurement results at 1KW m -2 The evaporation rate and corresponding evaporation efficiency of several evaporators under light intensity are 0.4697kg m -2 h -1 After loading with molybdenum disulfide (MPPU), the maximum pressure of the molybdenum disulfide was increased to 0.9395kg m -2 h -1 The evaporation rates of the three functionalized molybdenum disulfide evaporators are respectively (CMPPU) 1.0111kg m -2 h -1 、(OMPPU)1.1226kg m -2 h -1 、(NMPPU)1.0987kg m -2 h -1 . The functionalized molybdenum disulfide evaporator has better evaporation efficiency compared to 67.3% evaporation efficiency of a molybdenum disulfide evaporator (MPPU).
FIG. 5 shows four different evaporators at 1KW m -2 The surface temperature changes after 1h of illumination, the surface temperature is obviously increased after the sponge is loaded with molybdenum disulfide, the surface temperature of the modified molybdenum disulfide evaporator is higher, wherein the surface temperature of the functionalized molybdenum disulfide evaporator is up to 49.1 ℃, and the polyurethane sponge is loaded with more molybdenum disulfide, so that the polyurethane sponge has a better heat absorption and heat preservation effect.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A preparation method of functionalized molybdenum disulfide is characterized by comprising the following steps:
reacting molybdenum disulfide nanosheets with an organic matter containing sulfydryl to obtain functionalized molybdenum disulfide;
wherein the organic matter containing sulfhydryl group comprises at least one of thioglycolic acid, thioglycerol and mercaptoethylamine.
2. The preparation method of the functionalized molybdenum disulfide as claimed in claim 1, wherein the functionalized molybdenum disulfide is obtained by mixing molybdenum disulfide nanosheets, organic matter containing sulfydryl and water, performing ultrasonic treatment for 1-5 h, then stirring for 20-30 h, and filtering.
3. The method for preparing the functionalized molybdenum disulfide according to claim 2, wherein the mass ratio of the molybdenum disulfide nanosheets, the organic matter containing sulfydryl and the water is (0.05-0.2) to (0.1-15) to (5-100).
4. A functionalized molybdenum disulfide, characterized by being prepared by the preparation method as claimed in any one of claims 1 to 3.
5. A photothermal coating comprising the functionalized molybdenum disulfide prepared by the preparation method according to any one of claims 1 to 3 or the functionalized molybdenum disulfide according to claim 4.
6. The photothermal coating of claim 5 further comprising: a binder, a thickener, a dispersant and a surfactant.
7. The photothermal coating according to claim 6, wherein said binder is an aqueous polyurethane emulsion;
and/or, the thickener comprises carboxymethyl cellulose and/or hydroxyethyl cellulose;
and/or, the dispersant comprises water and isopropanol;
and/or the surfactant is sodium dodecyl benzene sulfonate.
8. The photothermal coating according to claim 5, wherein the mass ratio of the functionalized molybdenum disulfide, the binder, the thickener, the dispersant and the surfactant is (1-5), (5-25), (1-10), (30-120) and (0.01-0.05).
9. A method for preparing a photothermal coating according to any of claims 6 to 8, comprising the steps of:
adding the functionalized molybdenum disulfide into the dispersing agent, adding the surfactant, stirring, adding the binder and the thickening agent, and continuously stirring to obtain the photo-thermal coating.
10. Use of the photothermal coating material according to claims 5 to 8 or the photothermal coating material produced by the production method according to claim 9 as a photothermal material.
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