CN116285467A - Anti-dazzle composite material for bridge stay cable and preparation method - Google Patents
Anti-dazzle composite material for bridge stay cable and preparation method Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title abstract description 9
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- 229910021392 nanocarbon Inorganic materials 0.000 claims abstract description 116
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/32—Radiation-absorbing paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/004—Reflecting paints; Signal paints
-
- 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
- C08K3/02—Elements
- C08K3/04—Carbon
-
- 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
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
-
- 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
- C08K9/00—Use of pretreated ingredients
- C08K9/12—Adsorbed ingredients, e.g. ingredients on carriers
Abstract
The invention discloses an anti-dazzle composite material for a bridge stay cable and a preparation method thereof, wherein the anti-dazzle composite material is a carbon nanotube composite material with a multiple nanocluster structure; the anti-dazzling nano carbon powder comprises a nano carbon tube, nano carbon powder of a first-level cluster structure, and nano carbon powder of a second-level cluster structure, wherein the nano carbon powder is deposited and grafted on the surface of the nano carbon tube, the nano carbon powder is aggregated on the surface of the first nano carbon powder, the diameter of the first nano carbon powder is larger than that of the second nano carbon powder, the anti-dazzling effect is good, and the utilization of other colored pigments is not influenced.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to an anti-dazzle composite material for a bridge stay cable and a preparation method thereof.
Background
The bridge stay cable coating can generate strong reflection under the irradiation of sunlight, and has the function of dazzling the passing people and vehicles, thereby causing danger.
Anti-glare coatings have been developed, for example, by the physical matting methods currently in common use: the extinction can be realized by adding a large amount of inorganic mineral extinction additives such as silica, calcium carbonate, precipitated barium sulfate and other fillers, wax powder and the like into the powder coating formula. As in chinese patent CN 106349879a, wax powder and matting powder are added to the formulation of epoxy resin powder paint, wherein the matting powder is matted barium sulfate, and the prepared powder paint has low industrialization cost and good matting effect. Aiming at extinction of epoxy resin system powder coating, the chemical extinction method commonly used at present: b68 extinction curing agent (2-phenyl-2-imidazoline pyromellitic acid single salt) or B55 extinction curing agent (2-phenyl-2-imidazoline pyromellitic acid double salt) which are complexes of pyromellitic acid and 2-phenylimidazoline are added into the powder coating formula, and the complexes are cured with epoxy resin to obtain low-gloss powder.
However, the existing paint still has the problems of high reflectivity and insufficient adhesive force, and the absorption and scattering paint is realized mainly by adopting light-absorbing black pigment and adopting a matting agent to form a matte surface, the reflectivity of the paint is still high, the color is single, only black or dark paint can be obtained, and the appearance is single.
Disclosure of Invention
In view of the above, the application provides an anti-dazzle composite material for a bridge stay cable and a preparation method thereof, and the anti-dazzle composite material has good anti-dazzle effect and does not influence the utilization of other colored pigments.
In order to achieve the technical purpose, the application adopts the following technical scheme:
in a first aspect, the present application provides an anti-glare composite for a bridge stay cable, which is a carbon nanotube modified composite having a multiple nanocluster structure; the nano carbon powder deposition device comprises a nano carbon tube, a first nano carbon powder and a second nano carbon powder, wherein the first nano carbon powder is deposited on the surface of the nano carbon tube in a branch connection mode, the second nano carbon powder is gathered on the surface of the first nano carbon powder, and the diameter of the first nano carbon powder is larger than that of the second nano carbon powder.
Preferably, the diameter of the carbon nanotubes is 2-20nm, the length of the carbon nanotubes is 2-20 mu m, and the length of the carbon nanotubes is thousands times of the diameter of the carbon nanopowder, so that primary nanoclusters can be formed.
Preferably, the diameter of the first nano carbon powder is 50-80nm, and the diameter of the second nano carbon powder is 10-30nm.
In a second aspect, the present application provides a method for preparing an anti-glare composite for a bridge stay cable, comprising the steps of:
s1, dispersing carbon nanotubes in deionized water under a heating condition, stirring uniformly after ultrasonic dispersion, then adding a silane coupling agent, stirring continuously, then adding first nano carbon powder, and performing a grafting reaction to obtain a primary nanocluster mixed solution;
s2, adding second nano carbon powder into the primary nano cluster mixed solution under the heating condition, and stirring for reaction to obtain the nano carbon tube modified composite material with the multiple nano cluster structure, namely the anti-dazzle composite material.
Preferably, the carbon nanotubes are 10-50 parts by weight, the first carbon nano powder is 40-80 parts by weight, and the second carbon nano powder is 50-100 parts by weight.
Preferably, in step S1 and step S2, the heating conditions are in the temperature range of 40-60 ℃.
Preferably, the silane coupling agent comprises one or more of KH550 and KH 570.
In a third aspect, the present application provides a coating composition comprising an anti-glare composite for a bridge stay cable.
Preferably, a colored pigment is also included.
In a fourth aspect, the present application provides the use of a coating composition at a light wavelength of 390-780 nm.
The beneficial effects of this application are as follows: the anti-dazzle composite material is a nano carbon tube modified composite material with a nano cluster structure, can realize the effects of light absorption, multiple scattering, tube wall annihilation and the like, and has good anti-dazzle effect; the preparation process is safe and simple, and the mild reaction is carried out in the water solution at low temperature and constant pressure; the coating composition of the scheme can be added with other colored pigments, does not influence the utilization of other colored pigments, and can achieve the aim of reducing the direct irradiation of light without extinction, thereby preventing dazzle.
Drawings
FIG. 1 is a schematic representation of a primary nanocluster structure;
FIG. 2 is a schematic representation of a multiple nanocluster structure.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Interpretation of the terms
Carbon nanotubes: the tubular nano-scale graphite crystal is a seamless nano-scale tube formed by curling single-layer or multi-layer graphite sheets around a central axis according to a certain spiral angle, and C of each layer is SP2 hybridized to form a cylindrical surface of a hexagonal plane.
Nano carbon powder: carbon material powder having different diameters.
Wall annihilation of light: light is absorbed in the pipe and the light energy is converted into heat energy.
The application provides an anti-dazzle composite material for a bridge stay cable, which is a carbon nanotube modified composite material with a multiple nanocluster structure; the nano carbon powder deposition device comprises a nano carbon tube, a first nano carbon powder and a second nano carbon powder, wherein the first nano carbon powder is deposited on the surface of the nano carbon tube in a branch connection mode, the second nano carbon powder is gathered on the surface of the first nano carbon powder, and the diameter of the first nano carbon powder is larger than that of the second nano carbon powder.
It can be understood that in the application, the first nano carbon powder and the second nano carbon powder are sequentially deposited and grafted on the surface of the nano carbon tube in a layered manner, namely, after the large-particle first nano carbon powder aggregation cluster is obtained on the surface of the nano carbon tube, the small-diameter second nano carbon powder is added, so that the smaller-particle second nano carbon powder aggregation cluster is conveniently aggregated on the large-particle first nano carbon powder aggregation cluster, and multiple nano clusters are formed, thereby obtaining the nano carbon tube with the nano cluster structure on the surface.
The diameter of the carbon nanotubes is 2-20nm, preferably, the diameter of the carbon nanotubes is 5-15nm, more preferably, the diameter of the carbon nanotubes is 10nm, the length of the carbon nanotubes is 2-20 μm, preferably, the length of the carbon nanotubes is 5-1510 μm, more preferably, the length of the carbon nanotubes is 10 μm; the first carbon nano powder and the second carbon nano powder can reasonably aggregate clusters within the size range, and if the size of the carbon nano tube is too large, the total surface area is too small, and the light absorption is reduced; if the size of the carbon nano-tube is too small, the aggregation cluster number of the first carbon nano-powder and the second carbon nano-powder on the surface of the carbon nano-tube is influenced.
The diameter of the first nano carbon powder is 50-80nm, the diameter of the second nano carbon powder is 10-30nm, when the size of the first nano carbon powder is too large in the visible light wavelength range of 390-780nm, the number of the first nano carbon powder aggregation clusters is small, and when the size of the second nano carbon powder is too large, the number of the second nano carbon powder aggregation clusters is small, so that the scattering, absorption and tube wall annihilation effects on light are reduced; if the first nano carbon powder and the second nano carbon powder are too small in size, the cost is increased.
The application provides a preparation method of an anti-dazzle composite material for a bridge stay cable, which comprises the following steps:
s1, dispersing carbon nanotubes in deionized water under a heating condition, stirring uniformly after ultrasonic dispersion, then adding a silane coupling agent, stirring continuously, then adding first nano carbon powder, and performing a grafting reaction to obtain a primary nanocluster mixed solution;
s2, adding second nano carbon powder into the primary nano cluster mixed solution under the heating condition, and stirring for reaction to obtain the nano carbon tube modified composite material with the multiple nano cluster structure, namely the anti-dazzle composite material.
In the step S1, firstly, carrying out surface modification on a carbon nano-tube by using a silane coupling agent, and then depositing and grafting large-size first nano-carbon powder on the surface to form a primary nano-cluster similar to a corn cob structure, wherein the structure schematic diagram is shown in figure 1, and the figure 1 shows that the nano-carbon powder with the primary nano-cluster structure is deposited and grafted on the surface of the carbon nano-tube; after the primary nanocluster is formed, the silane coupling agent acts on the surface of the primary nanocluster to adsorb the second carbon nanocluster, so as to further deposit the second carbon nanocluster on the primary nanocluster to form a multiple nanocluster, the structure of which is shown in fig. 2, wherein a represents a schematic structure of the primary nanocluster, that is, the carbon nanocapsules (a) of the first-level cluster structure are deposited on the surface of the carbon nanocapsule (a) grafted with the second-level cluster structure (dotted line circle), b represents the second carbon nanocapsule particles, and the multiple nanocluster structures correspond to the surfaces of each of the 'corn grains' on the primary nanoclusters of the corn cob substructure and are then aggregated to form a 'blackberry' structure, and herein 'corn grains' represent the first carbon nanocapsules and 'blackberries' represent the second carbon nanocapsules.
10-50 parts of carbon nano-tubes, 40-80 parts of first nano-carbon powder and 50-100 parts of second nano-carbon powder.
In the step S1 and the step S2, the temperature of the heating condition is 40-60 ℃, preferably 45-55 ℃, preferably 50 ℃, if the temperature is too low, the activation energy required by the reaction cannot be reached, the temperature is too high, and the energy consumption is increased.
The silane coupling agent comprises one or more of KH550 and KH570, and preferably the silane coupling agent is KH550.
The present application provides a coating composition comprising an anti-glare composite for a bridge stay cable.
In particular, the coating composition further comprises colored pigments such as commercially available red pigments, yellow pigments, blue pigments, and the like.
The application provides application of a coating composition at 390-780nm light wavelength, and particularly can be used for preparing a bridge stay cable coating.
The present invention is further illustrated by the following specific examples.
Example 1
An anti-dazzle composite material for a bridge stay cable is a carbon nanotube composite material with a multiple nanocluster structure; the nano carbon powder deposition device comprises a nano carbon tube, a first nano carbon powder and a second nano carbon powder, wherein the first nano carbon powder is deposited on the surface of the nano carbon tube in a branch way, the second nano carbon powder is gathered on the surface of the first nano carbon powder, and the diameter of the first nano carbon powder is larger than that of the second nano carbon powder; the diameter of the carbon nano-tube is 10nm, and the length is 10 mu m; the diameter of the first nano carbon powder is 60nm, and the diameter of the second nano carbon powder is 20nm.
The preparation method for preparing the anti-dazzle composite material by using the carbon nanotubes, the first nano carbon powder and the second nano carbon powder comprises the following steps:
s1, dispersing 25 parts of carbon nanotubes in 100 parts of deionized water, stirring at a rotating speed of 1500rmp after ultrasonic treatment for 30min, heating to 50 ℃, adding a silane coupling agent KH550, continuously stirring for 10min, adding 60 parts of first nano carbon powder, continuously stirring for 30min, and performing grafting reaction to obtain a primary nano cluster mixed solution;
s2, adding 80 parts of second nano carbon powder into the primary nano cluster mixed solution under the heating condition of 50 ℃, stirring and reacting for 1h, and cooling to room temperature after the reaction is finished to obtain the nano carbon tube modified composite material with the multiple nano cluster structure, namely the anti-dazzle composite material.
Example 2
The anti-dazzle composite material for the bridge stay cable is the same as in the embodiment 1 except that the diameter of the carbon nano-tube is 20nm and the length is 20 mu m; the diameter of the first nano carbon powder is 80nm, and the diameter of the second nano carbon powder is 30nm.
Example 3
The anti-dazzle composite material for the bridge stay cable is the same as in the embodiment 1 except that the diameter of the carbon nano-tube is 2nm and the length is 2 mu m; the diameter of the first nano carbon powder is 50nm, and the diameter of the second nano carbon powder is 10nm.
Example 4
The anti-dazzle composite material for the bridge stay cable is the same as in the embodiment 1 except that the amount of the carbon nanotubes is 10 parts, the amount of the first nano carbon powder is 40 parts, and the amount of the second nano carbon powder is 50 parts.
Example 5
The anti-dazzle composite material for the bridge stay cable is the same as in the embodiment 1 except that the amount of the carbon nanotubes is 50 parts, the amount of the first nano carbon powder is 80 parts, and the amount of the second nano carbon powder is 100 parts.
Example 6
The anti-dazzle composite material for the bridge stay cable is the same as in the embodiment 1 except that the amount of the first nano carbon powder is 40 parts and the amount of the second nano carbon powder is 50 parts.
Example 7
The anti-dazzle composite material for the bridge stay cable is the same as in the embodiment 1 except that the amount of the first nano carbon powder is 80 parts and the amount of the second nano carbon powder is 100 parts.
Comparative example 1
An anti-dazzle material is a carbon nanotube with the diameter of 10nm and the length of 10 mu m.
Comparative example 2
An anti-dazzle composite material is a nano carbon tube modified composite material of primary nanoclusters, and comprises nano carbon tubes and second nano carbon powder which is deposited and grafted on the surfaces of the nano carbon tubes, wherein the diameter of each nano carbon tube is 10nm, and the length of each nano carbon tube is 10 mu m; the diameter of the second nano carbon powder is 20nm.
The preparation method for preparing the anti-dazzle composite material by using the carbon nanotubes and the first nano carbon powder comprises the following steps: dispersing 25 parts of carbon nanotubes in 100 parts of deionized water, carrying out ultrasonic treatment for 30min, stirring at a rotating speed of 1500rmp, heating to 50 ℃, adding a silane coupling agent KH550, continuously stirring for 10min, adding 80 parts of second nano carbon powder, continuously stirring for 30min, and carrying out grafting reaction to obtain the carbon nanotube modified composite material of the primary nanocluster.
Testing and application
The anti-dazzle materials in examples 1-7 and comparative examples 1-2 were added as coating components to coatings, each of which contained 20 parts of anti-dazzle material, 5 parts of lemon chrome yellow 501; the above-mentioned coating was applied to a bridge stay cable and formed into a coating layer, and the reflectance and color development were measured at a wavelength of 390 to 780nm, and the results were measured by a coating layer reflectance meter with reference to GB9270-1988 and GB5211.17-1988, and are shown in Table 1.
Table 1 results of testing the effect of each anti-glare material
| Reflectivity (%) | Color development | |
| Example 1 | 30 | Yellow colour |
| Example 2 | 40 | Yellow colour |
| Example 3 | 20 | Dark yellow |
| Example 4 | 50 | Yellow colour |
| Example 5 | 15 | Dark yellow |
| Example 6 | 35 | Yellow colour |
| Example 7 | 25 | Dark yellow |
| Comparative example 1 | 70 | Black color |
| Comparative example 2 | 45 | Dark yellow |
As can be seen from the table, the anti-dazzle composite material of the scheme can utilize fewer carbon tubes to realize smaller reflectivity, so that more other colored pigments can be added to obtain anti-dazzle coatings of various colors, rather than black or dark color coatings which can only be obtained for reducing the reflectivity, and absorption, scattering and annihilation of light are realized; compared with the single-stage cluster in comparative example 2, the multi-stage cluster in the scheme can increase the scattering of light, so that a small amount of carbon tubes can achieve the effect of absorbing a large amount of light; the reflectivity can be reduced by increasing the consumption of the carbon nano-tube, the first carbon nano-powder and the second carbon nano-powder, but the color development of the original pigment can be influenced by the excessive consumption.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. The anti-dazzle composite material for the bridge stay cable is characterized by being a carbon nanotube modified composite material with a multiple nanocluster structure; the nano carbon powder deposition device comprises a nano carbon tube, a first nano carbon powder and a second nano carbon powder, wherein the first nano carbon powder is deposited on the surface of the nano carbon tube in a branch connection mode, the second nano carbon powder is gathered on the surface of the first nano carbon powder, and the diameter of the first nano carbon powder is larger than that of the second nano carbon powder.
2. The anti-glare composite for a bridge stay cable according to claim 1, wherein the carbon nanotubes have a diameter of 2-20nm and a length of 2-20 μm.
3. The anti-glare composite for a bridge stay cable according to claim 1, wherein the diameter of the first nano carbon powder is 50-80nm, and the diameter of the second nano carbon powder is 10-30nm.
4. A method for preparing the anti-dazzle composite material for the stay cable of the bridge according to any one of claims 1 to 3, comprising the following steps:
s1, dispersing carbon nanotubes in deionized water under a heating condition, stirring uniformly after ultrasonic dispersion, then adding a silane coupling agent, stirring continuously, then adding first nano carbon powder, and performing a grafting reaction to obtain a primary nanocluster mixed solution;
s2, adding second nano carbon powder into the primary nano cluster mixed solution under the heating condition, and stirring for reaction to obtain the nano carbon tube modified composite material with the multiple nano cluster structure, namely the anti-dazzle composite material.
5. The method for preparing an anti-dazzle composite for a bridge stay cable according to claim 4, wherein the carbon nanotubes are 10-50 parts by mass, the first nano carbon powder is 40-80 parts by mass, and the second nano carbon powder is 50-100 parts by mass.
6. The method for preparing an anti-dazzle composite for a bridge stay cable according to claim 4, wherein in the step S1 and the step S2, the heating condition is in a temperature range of 40-60 ℃.
7. The method for preparing an anti-glare composite for a bridge stay cable according to claim 4, wherein the silane coupling agent comprises one or more of KH550 and KH 570.
8. A coating composition comprising an anti-glare composite for a bridge suspension cable according to any one of claims 1 to 3.
9. The coating composition of claim 8, further comprising a color pigment.
10. Use of the coating composition of claim 8 at a wavelength of 390-780 nm.
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