CN106313926B - A kind of surface modifying method changing impregnated graphite surface wettability energy - Google Patents
A kind of surface modifying method changing impregnated graphite surface wettability energy Download PDFInfo
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- CN106313926B CN106313926B CN201610856086.7A CN201610856086A CN106313926B CN 106313926 B CN106313926 B CN 106313926B CN 201610856086 A CN201610856086 A CN 201610856086A CN 106313926 B CN106313926 B CN 106313926B
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- laser
- impregnated graphite
- wettability
- surface modification
- impregnated
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 28
- 239000010439 graphite Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title abstract description 12
- 238000010330 laser marking Methods 0.000 claims abstract description 11
- 238000012986 modification Methods 0.000 claims abstract description 6
- 230000004048 modification Effects 0.000 claims abstract description 6
- 230000008595 infiltration Effects 0.000 claims abstract description 5
- 238000001764 infiltration Methods 0.000 claims abstract description 5
- 238000002715 modification method Methods 0.000 claims 4
- 238000012545 processing Methods 0.000 abstract description 6
- 239000007770 graphite material Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 12
- 238000005259 measurement Methods 0.000 description 7
- 238000012876 topography Methods 0.000 description 5
- 238000001237 Raman spectrum Methods 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 2
- 241000931526 Acer campestre Species 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 238000005213 imbibition Methods 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000013532 laser treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000010148 water-pollination Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
Landscapes
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Laser Beam Processing (AREA)
Abstract
本发明提供一种具有浸润可控性的浸渍石墨表面改性方法，包括根据浸渍石墨形状绘制相关激光打标机图案，确定表面改性范围，使用图案填充的方案进行激光打标；将待改性试件装卡至激光操作台上，并完成激光束对焦；设置激光打标参数为Q频为20kHz，空跳速度为2000mm/s；利用激光加工对表面形貌及表面特征的不同影响选择不同的扫描参数进行加工，从而得到不同浸润性(接触角范围为6.7°‑135.8°)的表面，同时不影响石墨材料整体的机械性能；此方法操作简单，易于大规模推广。
The invention provides a method for surface modification of impregnated graphite with infiltration controllability, which includes drawing a relevant laser marking machine pattern according to the shape of the impregnated graphite, determining a surface modification range, and using a pattern filling scheme for laser marking; The test piece is mounted on the laser operating table, and the laser beam is focused; the laser marking parameters are set as the Q frequency of 20 kHz, and the air jump speed as 2000 mm/s; the different effects of laser processing on the surface morphology and surface characteristics are selected. Different scanning parameters are used for processing to obtain surfaces with different wettability (contact angle range of 6.7°-135.8°) without affecting the overall mechanical properties of the graphite material; this method is simple to operate and easy to popularize on a large scale.
Description
Technical field
The invention belongs to solid material surface technical field of modification, in particular to a kind of change impregnated graphite surface wettability
The surface modifying method of energy.
Background technique
The features such as high-temperature stability for having due to graphite material itself, corrosion-resistant, radiation resistance, graphite material is answered extensively
For sealing, the fields such as bearing, as a kind of typical friction pair material.By the mechanical performance of the graphite of phenolic resin dipping
It is more excellent, thus in thrust bearing under being often used in severe duty, with the composition friction of other hard materials with pair.
In mechanical seal, thrust bearing, the friction and wear characteristic between friction pair determines these machines to a certain extent
The service life and maintenance cycle of tool system core components.And the wellability of material then largely affects friction with pair
Friction and wear characteristic, especially in thrust bearing, by control surface imbibition characteristic can control interface sliding situation,
So that thrust bearing realizes high bearing capacity, low friction torque.Therefore, in industrial application, the infiltration of impregnated graphite surface
Property it is controllable rub secondary state for control, reduce frictional dissipation, improving bearing capacity has important practical value.
In authorization at present, the disclosed patent for controlling surface wettability, two classes can be divided into from principle: one kind passes through painting
The technologies such as layer change the surface molecule structure characteristic of solid material or surface can (CN 101219804A, CN 1669777A, CN
1916056A, CN 104419894A), to change the wellability on surface, another kind of is by the methods of mechanical treatment, corrosion
Change surface topography, roughness (CN 105665940A, CN 1660924A), changes the contact area of solid liquid interface to change leaching
Lubricant nature.However in existing method, the technologies such as coating realize that difficulty is high, step is complicated, and the method for changing surface topography only can be changed
Infiltration degree cannot change Wettability (hydrophilic/hydrophobic).
Summary of the invention
In order to overcome the disadvantages of the above prior art, the purpose of the present invention is to provide a kind of leachings of change impregnated graphite surface
Lubricant nature can surface modifying method, it is simple and effective, step is simple, there is infiltration controllability, be based on laser marking machine, utilize laser
It realizes the hot-working and surface texture transformation on impregnated graphite surface, while being soaked from surface topography and molecular characterization angulation change surface
Lubricant nature.
To achieve the goals above, the technical solution adopted by the present invention is that:
A kind of surface modifying method changing impregnated graphite surface wettability energy, comprising:
Step 1: determining the modified range in surface according to impregnated graphite arbitrary shape associated laser marking machine pattern, using figure
The scheme of case filling carries out laser marking；
Step 2: being loaded test specimen to be modified to laser operations platform, and complete laser beam focusing；
Step 3: it is 20kHz that setting laser marking parameter, which is Q frequency, empty hop rate degree is 2000mm/s, in 500mm/s-
Scanning speed is adjusted within the scope of 2000mm/s, and laser power is adjusted within the scope of 5W-15W；
Step 4: selecting different parameters to add the Different Effects of surface topography and surface characteristics using laser processing
Work, to obtain the surface of different wellabilities.
Using laser irradiation impregnated graphite surface, by adjusting different scanning speed and laser power, so that dipping stone
The microscopic appearance on black surface changes, and molecular structure changes (Raman spectrum variation), but significant there is no being formed
Micro- texture has eventually led to the controllable variations of impregnated graphite surface wettability without apparent pattern array.
The scanning speed 500-2000mm/s, laser power parameters 5-15W, scanning times 1 time.
After laser treatment, the contact angle on impregnated graphite surface can arbitrarily control between 6.7 °~135.8 °.
Used optical maser wavelength is 1.06 μm.
Compared with prior art, the beneficial effects of the present invention are:
(1) only change the surface characteristics of impregnated graphite, the overall mechanical properties without will affect impregnated graphite；
(2) by the adjustment of different laser processing parameters, contact angle in a wide range of between 6.7 °~135.8 ° may be implemented
Any regulation, for the basis that provides of design of complicated interface sliding；
(3) surface modifying method it is simple and easy, without using excessive complex device, the local table in specific shape can be carried out
Face is modified.
Detailed description of the invention
Fig. 1 is initial interface contacts Angle Measurements disclosed by the embodiments of the present invention.
Fig. 2 is hydrophilic treated surface contact angle measurement result disclosed in an embodiment of the present invention.
Fig. 3 is hydrophobic treatment surface contact angle measurement result disclosed in an embodiment of the present invention.
Fig. 4 is the scanning electron microscope comparison diagram of graphite surface in the embodiment of the present invention.
Fig. 5 is the Raman spectrum comparison diagram of graphite material in the embodiment of the present invention.
Specific embodiment
The embodiment that the present invention will be described in detail with reference to the accompanying drawings and examples.
The present embodiment uses YAG-50 type lamp pumping laser marking (engraving) machine.Main performance index is as follows: optical maser wavelength
1.06 μm, laser peak power output 50W, laser repetition rate 20-80kHz, scan linear velocity≤7000mm/s, repeatable accuracy
0.003mm。
The solid sample that the present embodiment uses is graphite annulus made of FH82Z5 type phenolic resin impregnated graphite, sample outer diameter
58mm, internal diameter 42mm.
Laser focusing adjustment is carried out to working face first, so that working face is on confocal laser face, then basis
Specimen shape and expected modification area draw related modified figure, select suitable laser processing parameter to graphite sample into
Row local surfaces are modified.
Embodiment 1:
It is laser modified it is preceding by surface tension instrument measure its surface contact angle be 75.6 °, as shown in fig. 1.Setting swashs
Optical scanning speed is 2000mm/s, laser repetition rate 20kHz, laser power 12.5W, scanning times 1, localized region
After being irradiated, become 17.2 ° using surface tension instrument measurement surface contact angle, as shown in the left side Fig. 2.
Embodiment 2:
It is laser modified it is preceding by surface tension instrument measure its surface contact angle be 75.6 °.Laser scanning speed, which is arranged, is
2000mm/s, laser repetition rate 20kHz, laser power 10W, scanning times 1, after localized region is irradiated, benefit
Become 47.3 ° with surface tension instrument measurement surface contact angle, as shown in the right side Fig. 2.
Embodiment 3:
It is laser modified it is preceding by surface tension instrument measure its surface contact angle be 75.6 °.Laser scanning speed, which is arranged, is
2000mm/s, laser repetition rate 20kHz, laser power 7.5W, scanning times 1, after localized region is irradiated, benefit
Become 96 ° with surface tension instrument measurement surface contact angle, as shown in the left side Fig. 3.
Embodiment 4:
It is laser modified it is preceding by surface tension instrument measure its surface contact angle be 75.6 °.Laser scanning speed, which is arranged, is
1000mm/s, laser repetition rate 20kHz, laser power 5W after 1 localized region of scanning times is irradiated, are utilized
Surface tension instrument measurement surface contact angle becomes 135.8 °, as shown in the right side Fig. 3.
As shown in figure 4, passing through the scanning electron microscope result after each embodiment of observation, it can be seen that impregnate stone after laser modified
Pattern variation has occurred in black surface, in addition it can also be seen that the molecular structure on surface also has from the result of the Raman spectrum of Fig. 5
New variation, it is thus regarded that the change of surface imbibition characteristic is two kinds of items of change due to surface topography and surface molecule structure
What part generated.
By the adjustment of different laser processing parameters, times of contact angle in a wide range of between 6.7 °~135.8 ° may be implemented
Meaning regulation, chooses laser parameter in above-mentioned adjusting range, with the increase of laser power, contact angle becomes smaller therewith, works as laser
When power changes within the scope of 5~7.5W, hydrophobicity variation occurs for surface；When laser power changes within the scope of 10~15W, table
Face sends hydrophily variation.When drain water variation, scanning speed is most significant when being 1000mm/s, and when hydrophilic variation, scanning speed is
It is most significant when 500mm/s.
The above is only a preferred embodiment of the present invention, is not intended to restrict the invention, the present invention can have it is various change and
Variation.All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in this hair
Within bright protection scope.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610856086.7A CN106313926B (en) | 2016-09-27 | 2016-09-27 | A kind of surface modifying method changing impregnated graphite surface wettability energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610856086.7A CN106313926B (en) | 2016-09-27 | 2016-09-27 | A kind of surface modifying method changing impregnated graphite surface wettability energy |
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| Publication Number | Publication Date |
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| CN106313926A CN106313926A (en) | 2017-01-11 |
| CN106313926B true CN106313926B (en) | 2019-01-29 |
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| TWI827951B (en) * | 2021-07-05 | 2024-01-01 | 國立高雄大學 | Chemical detection platform having concave hole structure and manufacturing method thereof |
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