CN108822596B - Laser absorber and preparation method and application thereof - Google Patents
Laser absorber and preparation method and application thereof Download PDFInfo
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- CN108822596B CN108822596B CN201810564983.XA CN201810564983A CN108822596B CN 108822596 B CN108822596 B CN 108822596B CN 201810564983 A CN201810564983 A CN 201810564983A CN 108822596 B CN108822596 B CN 108822596B
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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
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
- C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
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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
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
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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
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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
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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Abstract
The invention discloses a laser absorber, a preparation method and application thereof, wherein the laser absorber comprises a light absorber main agent, a blending agent and a solvent, the light absorber main agent comprises carbon nanospheres and carbon nanotubes, and the light absorber main agent and the carbon nanospheres are matched with each other to improve the light absorption rate of the laser absorber and have better application prospect in a cutting device. Meanwhile, when the laser absorbent is used, the solvent body can be completely evaporated under laser irradiation, and the laser absorbent is green and environment-friendly and does not cause any damage to human bodies.
Description
Technical Field
The invention relates to the field of cutting, in particular to a laser absorbent, a preparation method and application thereof.
Background
The laser heat treatment technology is to irradiate a material to be treated by using a high-power-density laser beam, so that the material is heated to a phase transition temperature quickly and moves along with the beam, thereby completing the surface heat treatment of the material. Most of the prior cutter covers for laser cutting of label paper can only reach more than 3 ten thousand meters when cutting the label paper, and the cutting performance and the service life of the cutter covers need to be improved. In order to prolong the service life of the cutting device, a laser absorbent is required to be found for carrying out surface treatment on the cutting device, the cutting performance of the product is improved, the service life is prolonged,
disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a laser absorber and a preparation method and application thereof.
The technical scheme adopted by the invention is as follows:
the invention provides a laser absorber, which comprises a light absorber main agent, a blending agent and a solvent, wherein the light absorber main agent comprises carbon nanospheres and carbon nanotubes, and the blending agent is used for uniformly dispersing the light absorber main agent.
Preferably, the light absorbing agent comprises 1-1.8 parts by mass of a light absorbing agent main agent, 3.2-5 parts by mass of a blending agent and 10-12 parts by mass of a solvent.
Preferably, the size of the light absorbent main agent is 10-8000 nm.
Preferably, the ratio of carbon nanospheres in the light absorbent main agent is as follows: the mass ratio of the carbon nanotubes is (0.2-0.36): (0.64-0.8). When the carbon nanospheres and the carbon nanotubes in the light absorbent main agent are arranged in the proportion range, the connection between the specific surface area of the carbon nanospheres and the carbon nanotubes can be maximized, so that the included angle of the carbon nanotubes approaches to zero, and the laser absorption rate of the laser absorbent is improved.
Preferably, the blender is prepared by mixing raw materials comprising vinyl acetate, polyvinyl alcohol, dibutyl phthalate, 2-ethylhexanol, ammonium persulfate and water; the solvent is water. At present, the laser sensitizer coated on a cutting device mostly adopts components of white water (ethylene glycol monobutyl ether) and acetone (dimethyl ketone) as solvent main bodies, can be evaporated into the air under laser irradiation, and can be dissipated to the environment in the using process to cause pollution, thus influencing the health of people, and if the white water is prevented from being improperly used, mucosa irritation and headache can be caused, while the characteristic that acetone has acute poisoning mainly shows the anesthesia effect on the central nervous system, and fatigue, nausea, headache, dizziness and easy excitation appear. Vomiting, shortness of breath, spasm and even coma occur in severe cases. It has irritation to eye, nose and throat; the product can be used for treating vertigo, burning sensation, pharyngitis, bronchitis, asthenia, and easy excitement, and can cause dermatitis after long-term repeated contact with skin. Both chemicals are flammable and pose a risk of causing combustion and explosion when exposed to open fire, high heat, or contact with oxidants. Through continuous groping and a large number of experiments, the prepared blender can be completely cracked under the action of laser, and pollution is avoided.
Further, the blending agent is prepared by mixing raw materials including 38-54 parts by mass of vinyl acetate, 5-10 parts by mass of polyvinyl alcohol, 2-12 parts by mass of dibutyl phthalate, 0.2-2.2 parts by mass of 2-ethylhexanol, 0.1-6 parts by mass of ammonium persulfate and 30.5-46.9 parts by mass of water.
The invention also provides a preparation method of the laser absorbent, which comprises the following steps:
(1) mixing and stirring the light absorbent main agent, the blending agent and the solvent.
Preferably, in the step (1), the light absorbent main agent with the size of 10-8000 nm is screened out by using ion wind, and then the light absorbent main agent is mixed with the blending agent and the solvent. Screening equipment in Chinese patent document CN206981202U is preferably used for screening the main light absorbent.
The application of the laser light absorber in a cutting device.
Preferably, the base material of the cutting device is any one of high carbon steel and stainless steel.
Further, the thickness of the base material is 0.08-0.8 mm.
The invention has the beneficial effects that:
the key performance of the laser absorbent is the laser absorption rate, if only the carbon nanotube exists, the carbon nanotube has extremely high requirements on the incident light angle, the incident light can be gradually reduced along with the increase of the inclined angle between the deflection direction and the orientation of the photon and the carbon nanotube, the absorption is best when the inclined angle is zero, the absorption value can not be seen after the inclined angle is more than 60 degrees, the absorption is almost not generated when the inclined angle is more than 90 degrees, and the curing angle of the carbon nanotube on a workpiece can not be ensured when the laser absorbent is sprayed.
Drawings
FIG. 1 is a microscopic view of a gold image of the cutting devices of the experimental group of example 1 and comparative example 1;
fig. 2 is a microscopic view of the gold image of the cutting devices of example 2 and comparative example 3.
Detailed Description
The concept and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments to fully understand the objects, features and effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention.
Example 1
The blending agent is prepared by uniformly mixing 45 parts by mass of vinyl acetate, 5 parts by mass of polyvinyl alcohol, 4 parts by mass of dibutyl phthalate, 1 part by mass of 2-ethylhexanol, 0.1 part by mass of ammonium persulfate and 44.9 parts by mass of water. According to the nano carbon spheres: the mass ratio of the carbon nano-tubes is 0.2: 0.8, obtaining an absorbent main agent, screening the light absorbent main agent with the particle size of 10-8000 nm by using ion wind, adding 1 part by mass of the screened light absorbent main agent and 3.2 parts by mass of the blending agent into 12 parts by mass of water, placing the mixture in a stainless steel basin, stirring for 3 hours, and fully mixing to obtain the laser absorbent. In this example, the screening device in chinese patent document CN206981202U was used to screen the main light absorbent.
Experimental groups: the high carbon steel sheet with the length and width of 500mm and the thickness of 0.5mm is taken, the laser absorbent of the embodiment is sprayed after corona treatment, then the high carbon steel sheet is placed on a drying rack for drying, then laser heat treatment is carried out to harden the high carbon steel sheet, and finally a brush and clean water are used for cleaning to obtain the cutting device.
Comparative example 1: the same procedure as in the experimental group preparation was conducted except that comparative example 1 was not spray-coated with the laser absorbent of this example.
Comparative example 2: the same procedure as in the experimental group preparation was followed except that the laser absorber sprayed in comparative example 2 contained no carbon nanospheres and only carbon nanotubes as compared with the laser absorber of this example.
The absorption rate, the original hardness of the high carbon steel sheet, and the hardness after laser heat treatment were measured using the cutting devices of the experimental group, comparative example 1, and comparative example 2, and the experimental results are shown in tables 1, 2, and 3. Wherein, the in-situ method is used for testing the absorbance, and the laser is scanned for a certain time (t)0) At a temperature of T (T) of the sample0) Laser, laserThe formula of the light absorption rate is as follows:
where B is the laser absorption rate, m is the mass of the sample, cpIs the specific heat of the sample, TaIs room temperature, i.e. the initial temperature of the sample, and P is the laser power.
Table 1 performance of the cutting devices of the experimental groups
Table 2 performance of the cutting device of comparative example 1
Table 3 performance of the cutting device of comparative example 2
As can be seen from the data in tables 1 and 2, the cutting device prepared by coating the laser absorbent disclosed by the invention has higher laser absorptivity and better application prospect in the cutting device.
As can be seen from the data in tables 1 and 3, if the laser absorber only has carbon nanotubes, the incident light is gradually reduced with the increase of the angle between the polarization direction and the orientation of the photons and the carbon nanotubes due to the extremely high requirement of the carbon nanotubes on the angle of the incident light, and when the angle is zero, the absorption is the best, and when the angle is greater than 60 degrees, the absorption value can not be seen, and when the angle is greater than 90 degrees, the absorption is almost absent, and when the laser absorber is sprayed, the angle of the carbon nanotubes solidified on the workpiece can not be guaranteed, so when only contains the carbon nanotubes, the laser absorption efficiency of the laser absorber still needs to be improved. The invention supplements the laser exposed from the carbon tube gap by means of the full absorption characteristic of the carbon nanospheres, and can improve the absorption rate by more than 88-97%.
The cutting devices of the experimental group and the comparative example 1 were taken, and the microscopic sectional views after the laser heat treatment of the metal transformation hardening were observed using a gold image microscope, and the results are shown in fig. 1 (the numerical values and scale units in μm in the drawing). As can be seen from the figure, the control group had only a single hardened layer after laser processing and had shallow martensite due to the absence of the laser beam absorber of the present invention. The cutting device double-layer hardening structure of the experimental group contains the laser absorbent, and the laser absorbent is processed by laser, so that a transition layer with the depth of about 0.6-0.8 mm is further arranged in addition to a surface hardening layer, and the service life of the cutting device can be prolonged.
When the laser absorbent of the embodiment is used, the solvent body can be completely evaporated under the laser irradiation, and no harm can be caused to human bodies.
Example 2
The blending agent is prepared by uniformly mixing 45 parts by mass of vinyl acetate, 5 parts by mass of polyvinyl alcohol, 4 parts by mass of dibutyl phthalate, 1 part by mass of 2-ethylhexanol, 0.1 part by mass of ammonium persulfate and 44.9 parts by mass of water. According to the nano carbon spheres: the mass ratio of the carbon nano-tubes is 0.36: 0.64, obtaining an absorbent main agent, screening the absorbent main agent with the particle size of 10-8000 nm by using ion wind, adding 1.8 parts by mass of the screened absorbent main agent and 5 parts by mass of the blending agent into 10 parts by mass of water, placing the mixture into a stainless steel basin, stirring for 3 hours, and fully mixing to obtain the laser absorbent.
Comparative example 3: the laser absorber in comparative example 3 is the same as the laser absorber of this example, except that electrostatic wind was not used in the preparation process to screen the light absorber main agent.
The laser light absorbers of this example and those of comparative example 3 were used to prepare cutting devices according to the procedures of the experimental group of example 1, and the microscopic sectional view of the laser-heat-treated metal after phase transition hardening was observed using a gold image microscope, and the results are shown in FIG. 2 (in the figure, the numerical values and scale are in μm). As can be seen from the figure, the hardened layer of the cutting device prepared by using the ion wind screening absorbent main agent is thickened due to the fact that the absorbance of the carbon nanospheres and the carbon nanotubes with different nanometer sizes is different, the light absorbent main agent with the size of 10-8000 nm obtained by using the ion wind screening has higher absorbance, the laser absorbance of the laser absorbent can be improved, and therefore the hardened layer of the prepared cutting device is deepened, and the cutting performance of the cutting device is improved.
Example 3
The blending agent is prepared by uniformly mixing 38 parts by mass of vinyl acetate, 10 parts by mass of polyvinyl alcohol, 10 parts by mass of dibutyl phthalate, 0.2 part by mass of 2-ethylhexanol, 6 parts by mass of ammonium persulfate and 30.5 parts by mass of water. According to the nano carbon spheres: the mass ratio of the carbon nanotubes is 0.3: 0.7, obtaining an absorbent main agent, screening the light absorbent main agent with the particle size of 10-8000 nm by using ion wind, adding 1 part by mass of the screened light absorbent main agent and 3.2 parts by mass of the blending agent into 12 parts by mass of water, placing the mixture in a stainless steel basin, stirring for 3 hours, and fully mixing to obtain the laser absorbent.
Example 4
54 parts by mass of vinyl acetate, 5 parts by mass of polyvinyl alcohol, 12 parts by mass of dibutyl phthalate, 0.2 part by mass of 2-ethylhexanol, 0.1 part by mass of ammonium persulfate and 46.9 parts by mass of water are taken and uniformly mixed to prepare the blender. According to the nano carbon spheres: the mass ratio of the carbon nano-tubes is 0.36: 0.7, obtaining an absorbent main agent, screening the light absorbent main agent with the particle size of 10-8000 nm by using ion wind, adding 1.5 parts by mass of the screened light absorbent main agent and 4 parts by mass of the blending agent into 11 parts by mass of water, placing the mixture in a stainless steel basin, stirring for 3 hours, and fully mixing to obtain the laser absorbent.
Claims (10)
1. The laser absorber is characterized by comprising a light absorber main agent, a blending agent and a solvent, wherein the light absorber main agent comprises carbon nano-spheres and carbon nano-tubes, the blending agent is used for uniformly dispersing the light absorber main agent, and the blending agent is prepared by mixing raw materials comprising vinyl acetate, polyvinyl alcohol, dibutyl phthalate, 2-ethylhexanol, ammonium persulfate and water.
2. The laser beam absorber according to claim 1, comprising 1 to 1.8 parts by mass of the light absorber main agent, 3.2 to 5 parts by mass of the blending agent, and 10 to 12 parts by mass of the solvent.
3. The laser absorber according to claim 1 or 2, wherein the size of the main absorber is 10 to 8000 nm.
4. The laser absorber according to claim 1 or 2, wherein the carbon nanospheres in the light absorber main agent: the mass ratio of the carbon nanotubes is (0.2-0.36): (0.64-0.8).
5. The laser absorber according to claim 1 or 2, wherein the solvent is water.
6. The laser absorber according to claim 1, wherein the blending agent is prepared by mixing raw materials including 38 to 54 parts by mass of vinyl acetate, 5 to 10 parts by mass of polyvinyl alcohol, 2 to 12 parts by mass of dibutyl phthalate, 0.2 to 2.2 parts by mass of 2-ethylhexanol, 0.1 to 6 parts by mass of ammonium persulfate, and 30.5 to 46.9 parts by mass of water.
7. A method for preparing a laser absorber according to any of claims 1 to 6, comprising the steps of:
(1) mixing and stirring the light absorbent main agent, the blending agent and the solvent.
8. The method for preparing the laser absorbent according to claim 7, wherein in the step (1), the main absorbent with the size of 10-8000 nm is screened out by using ion wind, and then the main absorbent is mixed with the blending agent and the solvent.
9. Use of a laser light absorber as claimed in any one of claims 1 to 6 in a cutting device.
10. Use according to claim 9, wherein the substrate of the cutting device is any of high carbon steel, stainless steel.
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| CN106883818A (en) * | 2017-03-16 | 2017-06-23 | 西北工业大学 | Hud typed carbon ball/carbon nano tube composite wave-absorbing material and preparation method |
| CN107384148A (en) * | 2017-07-24 | 2017-11-24 | 宁波墨西科技有限公司 | Graphene-based heat radiation coating and preparation method thereof |
| CN206981202U (en) * | 2017-06-28 | 2018-02-09 | 深圳市哈德胜精密科技股份有限公司 | A kind of screening plant of nano material |
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|---|---|---|---|---|
| JP2006276426A (en) * | 2005-03-29 | 2006-10-12 | Toyo Tire & Rubber Co Ltd | Method for producing semiconductive seamless belt |
| CN102807801A (en) * | 2011-06-29 | 2012-12-05 | 深圳光启高等理工研究院 | Anti-radar coating and preparation method thereof |
| CN102936472A (en) * | 2012-12-05 | 2013-02-20 | 湖南神力铃胶粘剂制造有限公司 | Preparation method of novel waterproof quick-drying and freeze-proofing white emulsion |
| CN104226980A (en) * | 2014-07-29 | 2014-12-24 | 中国科学院重庆绿色智能技术研究院 | Method for enhancing laser energy absorption efficiency of metal powder material |
| CN106883818A (en) * | 2017-03-16 | 2017-06-23 | 西北工业大学 | Hud typed carbon ball/carbon nano tube composite wave-absorbing material and preparation method |
| CN206981202U (en) * | 2017-06-28 | 2018-02-09 | 深圳市哈德胜精密科技股份有限公司 | A kind of screening plant of nano material |
| CN107384148A (en) * | 2017-07-24 | 2017-11-24 | 宁波墨西科技有限公司 | Graphene-based heat radiation coating and preparation method thereof |
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