CN110081749A - Aluminium base ultrathin heat pipe and preparation method with super-hydrophobic-super hydrophilic structure - Google Patents
Aluminium base ultrathin heat pipe and preparation method with super-hydrophobic-super hydrophilic structure Download PDFInfo
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- CN110081749A CN110081749A CN201811605915.XA CN201811605915A CN110081749A CN 110081749 A CN110081749 A CN 110081749A CN 201811605915 A CN201811605915 A CN 201811605915A CN 110081749 A CN110081749 A CN 110081749A
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- super
- hydrophobic
- heat pipe
- aluminium base
- super hydrophilic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/04—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure
- F28D15/046—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure characterised by the material or the construction of the capillary structure
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a kind of aluminium base ultrathin heat pipe and preparation method with super-hydrophobic-super hydrophilic structure, step includes: that aluminum substrate is milled out groove surface and is cleaned up；Surface scan is carried out by first area of the nanosecond laser processing unit (plant) to the groove surface, forms the continuous capillary structure with fine hair pattern, and after heat treatment obtain super-hydrophobic region；After the aluminum substrate is cooling, Surface scan is carried out by second area of the nanosecond laser processing unit (plant) to the groove surface, the continuous capillary structure with fine hair pattern is formed, obtains super hydrophilic region；The identical aluminum substrate with the continuous capillary structure of two block sizes is welded together in the opposite mode of the groove surface；Encapsulation process is carried out after the inside cavity injection working media formed to two groove surfaces.By laser surface modification, the distribution mode that inner wall is alternateed with the super-hydrophobic region and super hydrophilic region of continuous capillary structure greatly improves radiating efficiency and heat pipe is more frivolous the present invention.
Description
Technical field
The present invention relates to heat conductor field, especially a kind of aluminium base ultrathin heat pipe with super-hydrophobic-super hydrophilic structure
And preparation method.
Background technique
The demand in laptop market constantly increases in recent years, and heat dissipation problem is always to perplex notebook computer performance to mention
The technical bottleneck risen, this proposes stern challenge to the cooling system of laptop, and laptop constantly to
High-performance, micromation, integrated development, heat dissipation problem it is increasingly prominent.
The cooling system of portable product mainly reaches heat dissipation using the phase transformation of liquid based on heat pipe heat radiation at present
Purpose, conventional heat pipe include sealing vacuum tube, liquid-sucking core, working media, and key technology is that the capillary for improving liquid-sucking core is made
Firmly, traditional liquid-sucking core mainly has silk screen core, powder sintered core, fibre core, groove core, composite core etc., these liquid-sucking cores are equal
There are some problems, it is difficult to meet the demand for development of heat pipe ultrathin.Meanwhile ultrathin heat pipe generallys use plated film in the prior art
Method and electrochemical process, the process is more complicated, cost costly.Therefore urgently propose a kind of new technical side about ultrathin heat pipe
Case, for solving many deficiencies present in conventional heat pipe technology.
Summary of the invention
The present invention solves the technical problem of provide a kind of ultra-thin heat of aluminium base with super-hydrophobic-super hydrophilic structure
Pipe and preparation method, for solving in the prior art, heat pipe heat radiation ability is poor, micromation degree is low, complex process, higher cost
The problems such as.
In order to solve the above technical problems, the first solution proposed by the present invention is: providing a kind of with super-hydrophobic-super close
The aluminium base ultrathin heat pipe preparation method step of water-bound includes: that aluminum substrate is milled out groove surface and is cleaned up；Swashed by nanosecond
Optical machining device carries out Surface scan to the first area of groove surface, forms the continuous capillary structure with fine hair pattern, and through heat
Super-hydrophobic region is obtained after processing；After aluminum substrate is cooling, carried out by second area of the nanosecond laser processing unit (plant) to groove surface
Surface scan forms the continuous capillary structure with fine hair pattern, obtains super hydrophilic region；Two block sizes are identical with continuous
The aluminum substrate of capillary structure is welded together in the opposite mode of groove surface；The inside cavity formed to two groove surfaces injects work
Encapsulation process is carried out after making medium.
Wherein, groove surface includes first area and the second area for alternateing distribution.
Wherein, it is 1fs~1000ns that the technological parameter of Surface scan, which includes: laser pulse width, and power is 0~500W, repeats frequency
Rate is 10KHz~50MHz, and scanning speed is 200~6000mm/s.
Wherein, aluminum substrate with a thickness of 0.5mm, groove surface depth is 0.2mm.
Wherein, be heat-treated is to toast 20h at 120 DEG C.
Wherein, using laser beam is focused to groove surface progress Surface scan, the continuous hair with fine hair pattern is formed in surface
Fine texture.
In order to solve the above technical problems, the second solution proposed by the present invention is: providing a kind of with super-hydrophobic-super close
The aluminium base ultrathin heat pipe of water-bound, the groove surface including the continuous capillary structure with fine hair pattern, groove surface include mutually handing over
For the super-hydrophobic region and super hydrophilic region of distribution；Aluminium base ultrathin heat pipe with super-hydrophobic-super hydrophilic structure is by above-mentioned tool
There is the aluminium base ultrathin heat pipe preparation method of super-hydrophobic-super hydrophilic structure to be made.
The beneficial effects of the present invention are: being in contrast to the prior art, the present invention provides a kind of with super-hydrophobic-super close
The aluminium base ultrathin heat pipe and preparation method of water-bound make aluminium base plate surface modifying using laser Surface scan, form with fine hair
The continuous capillary structure of pattern is alternateed the structure of distribution using super-hydrophobic region and super hydrophilic region, greatly improved scattered
The thermal efficiency, and simple process, it is more frivolous, it is low in cost.
Detailed description of the invention
Fig. 1 is the stream for one embodiment of aluminium base ultrathin heat pipe preparation method that the present invention has super-hydrophobic-super hydrophilic structure
Journey schematic diagram；
Fig. 2 is the dress for one embodiment of aluminium base ultrathin heat pipe preparation method that the present invention has super-hydrophobic-super hydrophilic structure
Set schematic diagram；
Fig. 3 is the knot for the one embodiment concave groove face of aluminium base ultrathin heat pipe that the present invention has super-hydrophobic-super hydrophilic structure
Structure schematic diagram.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment belongs to the scope of protection of the invention.
For first solution provided by the invention, please refer to Fig. 1 and Fig. 2, Fig. 1 be the present invention have it is super-hydrophobic-
The flow diagram of one embodiment of aluminium base ultrathin heat pipe preparation method of super hydrophilic structure, Fig. 2 be the present invention have it is super-hydrophobic-
The schematic device of one embodiment of aluminium base ultrathin heat pipe preparation method of super hydrophilic structure, wherein 201 process for nanosecond laser
Device, 202 be optical fiber, and 203 be galvanometer system, and 204 be laser work platform, and 205 be computer.
With the aluminium base ultrathin heat pipe preparation method of super-hydrophobic-super hydrophilic structure in present embodiment, specifically include following
Step:
S101: aluminum substrate is milled out into groove surface and is cleaned up.In this step, first the smooth aluminum substrate in surface is placed on
Satisfactory groove surface is milled out on machine-tool platform, then successively in acetone, dehydrated alcohol and goes the aluminum substrate processed respectively
It is cleaned 10 minutes in ionized water using ultrasonic washing instrument, and dries and obtain clean aluminum substrate, and the thickness of preferably aluminum substrate
For 0.5mm, groove surface depth is 0.2mm, can also be selected, not made according to the actual situation in other embodiments herein
It limits.
S102: Surface scan is carried out by first area of the nanosecond laser processing unit (plant) to groove surface, being formed has fine hair shape
The continuous capillary structure of looks, and after heat treatment obtain super-hydrophobic region.In this step, after S101 step, by cleaning
Aluminum substrate groove is placed upwardly on laser work platform 204, nanosecond laser processing unit (plant) 201 is controlled by computer 205, through light
Fibre 202 will focus laser beam and carry out Surface scan by first area of the galvanometer system 203 to groove surface, in first area surface shape
At the continuous capillary structure with fine hair pattern；Then 20h is toasted at 120 DEG C obtain super-hydrophobic region.Wherein, Surface scan work
Skill parameter includes: that laser pulse width is 1fs~1000ns, and power is 0~500W, and repetition rate is 10KHz~50MHz, scanning speed
Degree is 200~6000mm/s；In present embodiment, the preferred technological parameter of Surface scan are as follows: power 23W, repetition rate 350kHz,
Scanning speed 4336mm/s, overlapping rate 0.1475 in other embodiments can also be according to the actual situation to technological parameters
It is selected, is not limited thereto.
S103: after aluminum substrate is cooling, Surface scan, shape are carried out by second area of the nanosecond laser processing unit (plant) to groove surface
At the continuous capillary structure with fine hair pattern, super hydrophilic region is obtained.In this step, after S102 step, by aluminum substrate
After cooling, Surface scan is carried out by second area of the galvanometer system 203 to groove surface with laser beam is focused, on second area surface
Formed have fine hair pattern continuous capillary structure, obtain super hydrophilic region, and the Surface scan technological parameter in S103 step with
Surface scan technological parameter in S102 step is identical.Present embodiment further groove face includes above-mentioned first area and second area,
First area and second area alternate distribution, and first area and second area are respectively the same as super-hydrophobic region and super hydrophilic area
Domain is corresponding.
S104: the identical aluminum substrate with continuous capillary structure of two block sizes is welded in the opposite mode of groove surface
Together.In this step, after S103 step, by the identical aluminum substrate with continuous capillary structure of two block size sizes with two
The opposite mode of a groove surface welds together, and welds latter two opposite groove surface and forms closed cavity.
S105: encapsulation process is carried out after the inside cavity injection working media formed to two groove surfaces.In this step, warp
After crossing S104 step, pore is beaten at the top of above-mentioned closed cavity, working media is injected from the pore to inside cavity, injects work
As 1/3 that medium volume is about cavity total volume；Then vertically upward by pore at the top of cavity, cavity is vacuumized, it is last close
Pore is sealed, to complete the preparation of the aluminium base ultrathin heat pipe with super-hydrophobic-super hydrophilic structure.
Present embodiment sweeps the processing for the continuous capillary structure for realizing that ultrathin heat pipe has fine hair pattern using lasing area, and
And this continuous capillary structure super-hydrophobic region and super hydrophilic region alternate, the structural improvement heat pipe inner wall surface point
Sub- activity increases substantially surface free energy, and then improves surface capillary pressure, make super-hydrophobic region water can along edge to
Super hydrophilic region flowing, promote heat pipe returns liquid ability, accelerates the radiating efficiency of cooling system.Specifically, by material
Expect the test of thermal coefficient, the thermal coefficient of the aluminium base ultrathin heat pipe with super-hydrophobic-super hydrophilic structure is in the present invention
427.434W/ (mK), and the thermal coefficient of the heat pipe without the process of identical size is only in the prior art
203.54W/ (mK), therefore the present invention program significantly improves the thermal coefficient of heat pipe, greatly improves radiating efficiency.Meanwhile
Use surfacial pattern etching to increase the method for specific surface area in compared with the prior art, present embodiment uses laser Surface scan
Keep heat pipe inner wall surface modified, the waste of baseplate material when can effectively reduce etching enables heat pipe to prepare more frivolous.
It is in contrast to the prior art, the present invention provides a kind of ultra-thin heat of aluminium base with super-hydrophobic-super hydrophilic structure
Tube preparation method keeps surface of aluminum plate modified, forms the continuous capillary structure with fine hair pattern, utilize using laser Surface scan
Super-hydrophobic region and super hydrophilic region alternate the structure of distribution, radiating efficiency, and simple process greatly improved, gentlier
It is thin, it is low in cost.
For second solution provided by the invention, referring to Fig. 3, Fig. 3 is the present invention with super-hydrophobic-super hydrophilic
The structural schematic diagram of the one embodiment concave groove face of aluminium base ultrathin heat pipe of structure, wherein 301 be super hydrophilic region, 302 be super
Hydrophobic region.In present embodiment, the aluminium base ultrathin heat pipe with super-hydrophobic-super hydrophilic structure includes the company with fine hair pattern
The groove surface of continuous capillary structure, groove surface includes the super-hydrophobic region 302 and super hydrophilic region 301 for alternateing distribution, super thin
Water area 302 can accelerate the condensation of water droplet, and water droplet is promoted to flow to super hydrophilic region 301, therefore the water meeting in super-hydrophobic region 302
It is flowed along edge to super hydrophilic region 301, will form the effect resultant force to flows between liquid, and then accelerating liquid is poly-
It closes, forms flowing express passway, accelerating liquid flows back to evaporator section；Using super-hydrophobic 302 He of region in present embodiment
Super hydrophilic region 301 alternates distribution in a manner of wedge shape, in other embodiments, can select other according to the actual situation
Distribution mode is not limited thereto.The aluminium base ultrathin heat pipe with super-hydrophobic-super hydrophilic structure is by aforementioned with super thin
The aluminium base ultrathin heat pipe preparation method of the super hydrophilic structure of water-is made, therefore has super-hydrophobic-super hydrophilic structure in present embodiment
Aluminium base ultrathin heat pipe and the aforementioned aluminium base ultrathin heat pipe preparation method with super-hydrophobic-super hydrophilic structure obtained by have surpass
The aluminium base Ultrathin heat pipe structure and function of hydrophobic-super hydrophilic structure are consistent.
It is in contrast to the prior art, the present invention provides a kind of ultra-thin heat of aluminium base with super-hydrophobic-super hydrophilic structure
Pipe, groove surface have the continuous capillary structure of fine hair pattern, alternate distribution using super-hydrophobic region and super hydrophilic region
Radiating efficiency, and simple process, more frivolous, lower cost greatly improved in structure.
It should be noted that the above various embodiments belongs to same inventive concept, the description of each embodiment emphasizes particularly on different fields,
Not detailed place is described in separate embodiment, can refer to the description in other embodiments.
Embodiments of the present invention above described embodiment only expresses, the description thereof is more specific and detailed, but can not
Therefore it is construed as limiting the scope of the patent.It should be pointed out that for those of ordinary skill in the art,
Under the premise of not departing from present inventive concept, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.
Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (7)
1. a kind of aluminium base ultrathin heat pipe preparation method with super-hydrophobic-super hydrophilic structure, which is characterized in that step includes:
Aluminum substrate is milled out into groove surface and is cleaned up；
Surface scan is carried out by first area of the nanosecond laser processing unit (plant) to the groove surface, forms the company with fine hair pattern
Continuous capillary structure, and after heat treatment obtain super-hydrophobic region；
After the aluminum substrate is cooling, Surface scan, shape are carried out by second area of the nanosecond laser processing unit (plant) to the groove surface
At the continuous capillary structure with fine hair pattern, super hydrophilic region is obtained；
The identical aluminum substrate with the continuous capillary structure of two block sizes is welded in the opposite mode of the groove surface
It is connected together；
Encapsulation process is carried out after the inside cavity injection working media formed to two groove surfaces.
2. the aluminium base ultrathin heat pipe preparation method according to claim 1 with super-hydrophobic-super hydrophilic structure, feature exist
In the groove surface includes the first area for alternateing distribution and the second area.
3. the aluminium base ultrathin heat pipe preparation method according to claim 1 with super-hydrophobic-super hydrophilic structure, feature exist
In the technological parameter of the Surface scan includes: that laser pulse width is 1fs~1000ns, and power is 0~500W, and repetition rate is
10KHz~50MHz, scanning speed are 200~6000mm/s.
4. the aluminium base ultrathin heat pipe preparation method according to claim 1 with super-hydrophobic-super hydrophilic structure, feature exist
In, the aluminum substrate with a thickness of 0.5mm, the groove surface depth is 0.2mm.
5. the aluminium base ultrathin heat pipe preparation method according to claim 1 with super-hydrophobic-super hydrophilic structure, feature exist
In the heat treatment is to toast 20h at 120 DEG C.
6. the aluminium base ultrathin heat pipe preparation method according to claim 1 with super-hydrophobic-super hydrophilic structure, feature exist
In using laser beam is focused to groove surface progress Surface scan, in surface, formation has the continuous capillary of fine hair pattern
Structure.
7. a kind of aluminium base ultrathin heat pipe with super-hydrophobic-super hydrophilic structure, which is characterized in that including the company with fine hair pattern
The groove surface of continuous capillary structure, the groove surface includes the super-hydrophobic region and super hydrophilic region for alternateing distribution；The tool
The aluminium base ultrathin heat pipe of super-hydrophobic-super hydrophilic structure is that have super-hydrophobic-super hydrophilic knot as described in claim 1~6
The aluminium base ultrathin heat pipe preparation method of structure is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811605915.XA CN110081749A (en) | 2018-12-26 | 2018-12-26 | Aluminium base ultrathin heat pipe and preparation method with super-hydrophobic-super hydrophilic structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811605915.XA CN110081749A (en) | 2018-12-26 | 2018-12-26 | Aluminium base ultrathin heat pipe and preparation method with super-hydrophobic-super hydrophilic structure |
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| CN110081749A true CN110081749A (en) | 2019-08-02 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110357032A (en) * | 2019-08-27 | 2019-10-22 | 江苏集萃精凯高端装备技术有限公司 | A kind of fluid channel processing method that hydrophilic and hydrophobic is controllable |
| CN111578756A (en) * | 2020-04-02 | 2020-08-25 | 南方科技大学 | Gradient wettability loop heat pipe |
| CN113498295A (en) * | 2020-03-19 | 2021-10-12 | 华为技术有限公司 | Ultrathin soaking plate, preparation method thereof and electronic equipment |
-
2018
- 2018-12-26 CN CN201811605915.XA patent/CN110081749A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110357032A (en) * | 2019-08-27 | 2019-10-22 | 江苏集萃精凯高端装备技术有限公司 | A kind of fluid channel processing method that hydrophilic and hydrophobic is controllable |
| CN113498295A (en) * | 2020-03-19 | 2021-10-12 | 华为技术有限公司 | Ultrathin soaking plate, preparation method thereof and electronic equipment |
| CN113498295B (en) * | 2020-03-19 | 2022-12-13 | 华为技术有限公司 | Ultrathin soaking plate, preparation method thereof and electronic equipment |
| CN111578756A (en) * | 2020-04-02 | 2020-08-25 | 南方科技大学 | Gradient wettability loop heat pipe |
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