CN114228205A - Process for simply preparing oriented ordered carbon fiber heat-conducting composite material in laboratory - Google Patents
Process for simply preparing oriented ordered carbon fiber heat-conducting composite material in laboratory Download PDFInfo
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- CN114228205A CN114228205A CN202111482185.0A CN202111482185A CN114228205A CN 114228205 A CN114228205 A CN 114228205A CN 202111482185 A CN202111482185 A CN 202111482185A CN 114228205 A CN114228205 A CN 114228205A
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 91
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 91
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 239000002131 composite material Substances 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims description 27
- 239000000463 material Substances 0.000 claims abstract description 129
- 239000003292 glue Substances 0.000 claims abstract description 42
- 238000005520 cutting process Methods 0.000 claims abstract description 18
- 238000001125 extrusion Methods 0.000 claims abstract description 14
- 238000012163 sequencing technique Methods 0.000 claims abstract description 10
- 238000000465 moulding Methods 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000009849 vacuum degassing Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 229920002799 BoPET Polymers 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/001—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The application discloses simple and easy technology of preparing directional sequencing carbon fiber heat-conducting composite material in laboratory includes the following steps: s1, preparing a strip base material: adding carbon fiber heat-conducting composite material base materials into the dispensing tube, and extruding a piston of the dispensing tube at a constant speed to prepare a plurality of strip-shaped base materials; the cross sectional area of the lower end of the glue outlet is smaller than that of the cavity of the glue dispensing pipe; s2, alignment, curing and molding: arranging a plurality of strip-shaped base materials in parallel in sequence along the extrusion direction, and curing and molding at high temperature; s3, cutting: after the strip-shaped base material is cooled, cutting the strip-shaped base material at equal intervals according to a preset interval, and cutting the strip-shaped base material into a plurality of small sections of base materials at the same interval; s4, splicing: and turning the small sections of base materials by 90 degrees, and rearranging the small sections of base materials to obtain the carbon fiber heat-conducting composite material assembled sheet with uniform thickness. The test sheet can be manufactured by using a common device without customizing a special extruding and slicing machine, and the effect of directionally sequencing the carbon fibers in the test sheet can be realized.
Description
Technical Field
The application relates to the technical field of high-thermal-conductivity composite materials, in particular to a process for simply preparing a directional ordered carbon fiber thermal-conductivity composite material in a laboratory.
Background
In recent years, with the improvement of living standard of people and the coming of the 5G era, the requirements of various electrical components on electronic chips are higher and higher, the heat productivity of various electronic devices is also improved along with the continuous increase of the power of the electronic devices, and if the heat dissipation problem of the electronic devices cannot be well solved, the service life and the safety of the electronic devices are greatly influenced. And thus the demand for heat dissipation from electronic devices is also increasing.
At present, the heat conductivity coefficient of a heat-conducting interface material prepared by the traditional heat-conducting filler is mostly not more than 9W, and the heat-conducting interface material cannot meet the heat dissipation requirement of people, so that some materials with ultrahigh heat conductivity have received a lot of attention. The carbon fiber is one of the materials which is widely concerned, the carbon fiber is an anisotropic material, the thermal conductivity is ultrahigh in the axial direction and can reach 600-1300W/mK, and after the carbon fiber is orderly arranged in the silicon rubber, the thermal conductivity of the thermal interface material can be obviously improved under a smaller filling amount.
In the conventional technical scheme, the heat-conducting filler and the silicon rubber are uniformly mixed to form a base material, and then the base material is molded/rolled and vulcanized to form the heat-conducting filler. Because the traditional heat-conducting filler has isotropy, the forming process of the base material basically has no influence on the heat-conducting performance of the heat-conducting composite material, but the carbon fibers are disorderly arranged in the sheet material and cannot achieve the effect of axial arrangement in the heat-conducting direction when mould pressing/roll pressing vulcanization forming is carried out according to the traditional process, so that the real heat conductivity of the carbon fiber heat-conducting composite material cannot be presented.
In the traditional process, in order to ensure that the carbon fibers can be directionally arranged in the heat conduction direction, a magnetic field or mechanical extrusion mode is mainly adopted, then compression molding is carried out, more raw materials are consumed, an extrusion tool and a forming die are required to be customized, and a special slicing machine is also required during cutting. Small laboratories often do not have these conditions for preparation, which results in the inconvenience of testing thermal conductivity.
Disclosure of Invention
The application provides a process for simply preparing directional sequencing carbon fiber heat-conducting composite material in a laboratory, does not need to customize special extrusion and slicing machines, has the effect that a test sheet can be prepared by utilizing a common device, and can enable carbon fibers to be directionally sequenced in the test sheet.
The application provides a process for simply preparing directional sequencing carbon fiber heat-conducting composite material in a laboratory, which adopts the following technical scheme:
a simple process for preparing a directional ordered carbon fiber heat-conducting composite material in a laboratory comprises the following steps:
s1, preparing a strip base material: adding the prepared carbon fiber heat-conducting composite material base material into the dispensing tube, extruding a piston of the dispensing tube at a constant speed by using a dispenser, and extruding a plurality of strip-shaped base materials; the glue outlet of the glue dispensing pipe is a conical channel, and the cross sectional area of the lower end of the glue outlet is smaller than that of the cavity of the glue dispensing pipe;
s2, alignment, curing and molding: arranging a plurality of strip-shaped base materials in parallel in sequence along the extrusion direction, and curing and molding at high temperature;
s3, cutting: after the strip-shaped base material is cooled, cutting the strip-shaped base material at equal intervals according to a preset interval, and cutting the strip-shaped base material into a plurality of small sections of base materials at the same interval;
s4, splicing: and turning the small sections of base materials by 90 degrees, and rearranging the small sections of base materials to obtain the carbon fiber heat-conducting composite material assembled sheet with uniform thickness.
By adopting the technical scheme, after the prepared carbon fiber heat-conducting composite material base material is added into the dispensing tube, the air pressure at the upper part of the piston of the dispensing tube is regulated at a constant speed by the dispensing machine, so that the air pressure at the upper part of the piston is higher than the air pressure at the lower part of the piston, and the carbon fiber heat-conducting composite material base material is extruded from the glue outlet at a constant speed; because the lower part of the dispensing tube is a conical channel, the cross-sectional area of the lower end of the conical channel is smaller than that of the cavity of the dispensing tube, when the carbon fiber heat-conducting composite material base material is extruded and pushed into the conical channel, the inner wall of the conical channel extrudes the carbon fiber heat-conducting composite material base material again to extrude a plurality of strip-shaped base materials, and the strip-shaped base materials are sequentially arranged in parallel along the extrusion direction, thereby finally achieving the purpose of directionally sequencing the carbon fibers in the carbon fiber heat-conducting composite material base material.
Preferably, the inner diameter of the cavity of the glue dispensing tube is at least 5 times of the minimum inner diameter of the glue outlet.
Through adopting above-mentioned technical scheme, the inventor has verified through many times of experiments that the cavity internal diameter of glue dispensing pipe is 5 times of the minimum internal diameter of glue outlet at least to make the carbon fiber orientation in the equipment sheet of making better, and then improve the heat conduction effect of equipment sheet.
Preferably, in step S1, before the piston is loaded into the dispensing tube, the carbon fiber thermal conductive composite material base material in the dispensing tube is subjected to a vacuum defoaming operation.
Through adopting above-mentioned technical scheme, the vacuum defoamation operation is convenient for discharge the bubble that contains in the carbon fiber heat conduction combined material matrix to improve measured data's accuracy.
Preferably, after the carbon fiber heat-conducting composite material base material in the dispensing tube is subjected to vacuum defoaming operation, the piston is pushed to be in full contact with the carbon fiber heat-conducting composite material base material, and air between the carbon fiber heat-conducting composite material base material and the glue outlet is discharged.
Through adopting above-mentioned technical scheme, discharge the air between carbon fiber heat conduction combined material base material and the play jiao kou in advance, be convenient for make the head end terminal surface of first strip base material more level and more smooth.
Preferably, in the S1 step, the extruded strip web is placed on a PET release film.
By adopting the technical scheme, the PET release film is also called a PET silicon oil film, and a layer of silicon oil is coated on the surface of the PET film to reduce the adhesive force on the surface of the PET film, so that the strip base material and the PET release film are conveniently separated in the subsequent process.
Preferably, the extruded strands of web material are arranged closely one by one in the direction of their thickness.
Through adopting above-mentioned technical scheme, closely arrange many strip base stocks one by one to the strip base stock of multiseriate of being convenient for bonds together, and then makes a plurality of equipment sheets of every row of making bond together, because single equipment sheet terminal surface area is less, bonds a plurality of equipment sheets together side by side, is favorable to improving the area of contact of equipment sheet terminal surface, thereby is convenient for later stage measurement.
Preferably, in step S4, when the assembled sheets are spliced, each row/column is closely arranged, and the gap between adjacent assembled sheets is reduced.
By adopting the technical scheme, the gaps between the adjacent assembling sheets are reduced, the assembling sheets are closely arranged together, and a measuring unit is convenient to form, so that the heat conductivity coefficient of the measuring unit is convenient to measure, and the influence of air between the two adjacent assembling sheets on an experimental result is reduced.
Preferably, the side wall of the piston close to the glue outlet is a conical surface attached to the inner wall of the glue outlet.
Through adopting above-mentioned technical scheme, the conical surface of piston can laminate with the inner wall of glue outlet to reduce the intraductal residue of carbon fiber heat-conducting composite material base stock in the point, save the raw materials.
Preferably, the tapered channel is conical or pyramidal.
By adopting the technical scheme, the conical channel can be selected to be conical or pyramid-shaped, and more types of dispensing tubes can be selected, so that the adaptability of the process is improved.
In conclusion, the application has the following beneficial effects:
1. after the prepared carbon fiber heat-conducting composite material base material is added into the dispensing tube, the air pressure at the upper part of the piston of the dispensing tube is regulated at a constant speed by using a dispensing machine, so that the air pressure at the upper part of the piston is higher than the air pressure at the lower part of the piston, and the carbon fiber heat-conducting composite material base material is extruded from a glue outlet at a constant speed; because the lower part of the dispensing tube is a conical channel, the cross-sectional area of the lower end of the conical channel is smaller than that of the cavity of the dispensing tube, when the carbon fiber heat-conducting composite material base material is extruded and pushed into the conical channel, the inner wall of the conical channel extrudes the carbon fiber heat-conducting composite material base material again to extrude a plurality of strip-shaped base materials, and the strip-shaped base materials are sequentially arranged in parallel along the extrusion direction, thereby finally achieving the purpose of directionally sequencing the carbon fibers in the carbon fiber heat-conducting composite material base material;
2. the vacuum defoaming operation is convenient for discharging bubbles contained in the carbon fiber heat-conducting composite material base material, so that the accuracy of the measured data is improved.
Drawings
FIG. 1 is a process flow diagram of an embodiment of the present application.
Fig. 2 is a schematic diagram of the carbon fiber heat-conducting composite material according to the embodiment of the present application after extrusion arrangement.
Fig. 3 is a schematic diagram of the carbon fiber heat-conducting composite material after extrusion, arrangement, curing and cutting according to the embodiment of the application.
Fig. 4 is a schematic diagram of a spliced and assembled sheet material after cutting of the carbon fiber heat-conducting composite material according to the embodiment of the application.
Description of reference numerals: 1. a strip-shaped base material; 2. a small segment of base stock; 3. and assembling the sheet material.
Detailed Description
The application discloses simple and easy technology of preparing directional sequencing carbon fiber heat conduction composite material in laboratory refers to fig. 1, includes the following steps:
s1, preparing a strip base material 1: adding the prepared carbon fiber heat-conducting composite material base material into the dispensing tube, and carrying out vacuum defoaming operation on the carbon fiber heat-conducting composite material base material in the dispensing tube before the piston is filled into the dispensing tube. The vacuum defoaming operation is convenient for discharging bubbles contained in the carbon fiber heat-conducting composite material base material, and the influence of the bubbles on the measurement data is reduced, so that the accuracy of the measurement data is improved.
Then, the piston is pushed to be in full contact with the carbon fiber heat-conducting composite material base material, and air between the carbon fiber heat-conducting composite material base material and the glue outlet is discharged. And extruding part of the carbon fiber heat-conducting composite material base material, and finally, trowelling the carbon fiber heat-conducting composite material base material at the glue outlet so that the carbon fiber heat-conducting composite material base material is flush with the end face of the glue outlet. Therefore, the head end surface of the first strip-shaped base material 1 is more smooth.
Then, connecting an adapter of a dispenser with a glue inlet of a dispensing tube, extruding a piston of the dispensing tube at a constant speed by using the dispenser, moving the dispensing tube at a constant speed, and extruding a plurality of strip-shaped base materials 1; the glue outlet of the glue dispensing pipe is a conical channel, the cross-sectional area of the lower end of the glue outlet is smaller than that of the cavity of the glue dispensing pipe, and the inner diameter of the cavity of the glue dispensing pipe is at least 5 times of the minimum inner diameter of the glue outlet. The side wall of the piston close to the glue outlet is arranged to be a conical surface attached to the inner wall of the glue outlet, so that the carbon fiber heat-conducting composite material base material in the conical channel is discharged to the greatest extent, the residual quantity of the carbon fiber heat-conducting composite material base material in the glue dispensing pipe is reduced, and raw materials are saved.
Of course, the tapered channel may be conical or pyramid-shaped, the embodiment is preferably conical, and the sidewall of the piston near the glue outlet is adaptively adjusted according to the shape of the tapered channel.
S2, alignment, curing and molding: referring to fig. 2, the extruded strip-shaped base material 1 is placed on a PET release film, and a plurality of extruded strip-shaped base materials 1 are closely arranged on the PET release film one by one in the thickness direction of the strip-shaped base materials 1, so that a plurality of rows of strip-shaped base materials 1 are conveniently adhered together. The arrangement length and width of the extruded strip base material 1 are controlled according to the experimental requirements. For example, when the length, width, height, 30mm, 2mm carbon fiber heat-conducting composite material combined sheet 3 is prepared, and the inner diameter of the glue outlet of the used glue dispensing tube is 2mm, the minimum length and width of the arrangement of the extruded carbon fiber composite material can be controlled to be 35mm, 34mm, that is, the extrusion length is at least 35mm, and at least 17 carbon fiber heat-conducting composite material sheets are closely arranged, so that the requirement can be met. And (3) placing the arranged strip base materials 1 in a laboratory oven for high-temperature curing molding, and taking out and cooling.
S3, cutting: referring to fig. 3, after the strip-shaped base material 1 is cooled, cutting intervals are set along the extrusion direction of the strip-shaped base material 1 according to preset intervals, and the strip-shaped base material 1 is cut into a plurality of small sections of base materials 2 with the same intervals. In this embodiment, a preset distance of 2mm is taken as an example, and the actual preset distance can be selected according to actual requirements. When cutting, the cutting end face needs to be ensured to be smooth, and the cutting end face is vertical to the length of the strip base material 1.
S4, splicing: referring to fig. 4, the cut small sections of base materials 2 are slowly removed from the PET release film at a constant speed, then the small sections of base materials 2 are turned over by 90 degrees, so that the measuring surfaces of 17 small sections of base materials 2 adhered together in each row face upwards, the end surfaces of 17 small sections of base materials 2 in each row are ensured to be positioned on the same horizontal plane, and the base materials are rearranged to obtain the carbon fiber heat-conducting composite material assembled sheet 3 with uniform thickness.
In order to further verify the reliability of the scheme, the prepared carbon fiber heat-conducting composite material base material is divided into 4 parts, and the oriented ordered assembled sheets 3 for testing the heat conductivity coefficient are respectively prepared. The carbon fiber heat-conducting composite material base material is extruded by three spot rubber tubes according to the method, 2mm assembled sheets 3 are obtained by splicing and assembling, at least 3 assembled sheets 3 which can be used for testing are obtained in each part, 2 sheets are randomly extracted in each part, 6 sheets are extracted from the three assembled sheets 3, 2 sheets are extracted from each assembled sheet 3 to form a group, and the three groups are marked as numbers 1, 2 and 3 respectively. And finally, 3g-5g of carbon fiber heat-conducting composite material base material is remained in each dispensing tube.
Set up the contrast experiment, get 1kg carbon fiber heat conduction combined material base material and pour into traditional mould into, utilize traditional mould to extrude, will follow the equipment sheet 3 that the slice made 2mm after the solidification of the carbon fiber heat conduction combined material base material that has already oriented that extrudes in traditional mould, extract 6 pieces at random from it, every 2 pieces are a set of to mark as 4, 5 and 6. Finally, 500g-800g of carbon fiber heat-conducting composite material base material still remains in the traditional die and cannot be extruded.
And testing the heat conductivity coefficients of the 6 groups of assembled sheets 3 by using the same equipment according to the same testing method under the condition of the same compression rate, measuring each group of assembled sheets 3 for multiple times, and obtaining two groups of average data.
The final result, as shown in the table below, is that the thermal conductivity of the assembled sheet 3 obtained by the simple extrusion splicing process is improved compared to the thermal conductivity of the assembled sheet 3 obtained by the conventional process. However, the difference of the thermal conductivity coefficients measured by the two processes is not great, which proves that the assembly sheet 3 prepared by the process meets the actual production requirement.
Because traditional mould generally need be customized, and bulky, need fill up carbon fiber heat conduction composite material base material in the traditional mould and just can normally use. Therefore, the carbon fiber heat-conducting composite material base material required by one experiment is used in a large amount, and the residual amount of the carbon fiber heat-conducting composite material base material finally remained in the traditional mold is also large.
However, this application uses some rubber tubes, and some rubber tubes are long-pending compare in traditional mould, and the volume is less, and comparatively common on the market. The carbon fiber heat-conducting composite material base material required by one-time experiment is small in using amount, and the residual amount of the carbon fiber heat-conducting composite material base material remained in the traditional mold is small. Therefore, the process can well test the thermal conductivity of the carbon fiber composite material after directional sequencing, is used as a method for testing the thermal conductivity in early experimental research, and has the advantages of few consumables, simple operation and high repeatability.
The implementation principle of the embodiment of the application is as follows:
after the prepared carbon fiber heat-conducting composite material base material is added into the dispensing tube, the air pressure at the upper part of the piston of the dispensing tube is regulated at a constant speed by the dispensing machine, so that the air pressure at the upper part of the piston is higher than the air pressure at the lower part of the piston, and the carbon fiber heat-conducting composite material base material is extruded from the glue outlet at a constant speed.
Because the lower part of the dispensing tube is a conical channel, the cross-sectional area of the lower end of the conical channel is smaller than that of the cavity of the dispensing tube, when the carbon fiber heat-conducting composite material base material is extruded and pushed into the conical channel, the inner wall of the conical channel extrudes the carbon fiber heat-conducting composite material base material again, and finally the purpose of directionally sequencing the carbon fibers in the carbon fiber heat-conducting composite material base material is achieved.
Then, the extruded strip base material 1 is placed on a PET release film, and a plurality of extruded strip base materials 1 are closely arranged on the PET release film one by one according to the thickness direction of the strip base materials 1, so that a plurality of rows of strip base materials 1 are conveniently adhered together.
Then, the arranged strip base materials 1 are placed in a laboratory oven for high-temperature curing and molding, and then are taken out for cooling. After the strip base material 1 is cooled, cutting intervals are arranged along the extrusion direction of the strip base material 1 according to preset intervals, and the strip base material 1 is cut into a plurality of small sections of base materials 2 with the same intervals.
Finally, the plurality of assembling sheets 3 are vertically placed, and the plurality of assembling sheets 3 are closely arranged together to form a measuring unit, so that the heat conductivity coefficient of the measuring unit is conveniently measured, and the influence of air between two adjacent assembling sheets 3 on an experimental result is reduced.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. A process for simply preparing a directional sequencing carbon fiber heat-conducting composite material in a laboratory is characterized by comprising the following steps: the method comprises the following steps:
s1, preparing a strip base material (1): adding the prepared carbon fiber heat-conducting composite material base material into the dispensing tube, and extruding a piston of the dispensing tube at a constant speed by using a dispenser to extrude a plurality of strip-shaped base materials (1); the glue outlet of the glue dispensing pipe is a conical channel, and the cross sectional area of the lower end of the glue outlet is smaller than that of the cavity of the glue dispensing pipe;
s2, alignment, curing and molding: arranging a plurality of strip-shaped base materials (1) in parallel in sequence along the extrusion direction, and curing and molding at high temperature;
s3, cutting: after the strip-shaped base material (1) is cooled, cutting the strip-shaped base material (1) at equal intervals according to a preset interval, and cutting the strip-shaped base material (1) into a plurality of small sections of base materials (2) at the same interval;
s4, splicing: and (3) turning the small sections of the base materials (2) for 90 degrees, and rearranging the small sections of the base materials to obtain the carbon fiber heat-conducting composite material assembled sheet (3) with uniform thickness.
2. The process for simply preparing the directionally ordered carbon fiber heat-conducting composite material in the laboratory according to claim 1 is characterized in that: the inner diameter of the cavity of the glue dispensing pipe is at least 5 times of the minimum inner diameter of the glue outlet.
3. The process for simply preparing the directionally ordered carbon fiber heat-conducting composite material in the laboratory according to claim 2 is characterized in that: in step S1, before the piston is loaded into the dispensing tube, the carbon fiber thermal conductive composite material base material in the dispensing tube is subjected to vacuum degassing.
4. The laboratory simple process for preparing the directionally ordered carbon fiber heat-conducting composite material according to claim 3 is characterized in that: and after the carbon fiber heat-conducting composite material base material in the dispensing pipe is subjected to vacuum defoaming operation, the piston is pushed to be in full contact with the carbon fiber heat-conducting composite material base material, and air between the carbon fiber heat-conducting composite material base material and the glue outlet is discharged.
5. The process for simply preparing the directionally ordered carbon fiber heat-conducting composite material in the laboratory according to claim 1 is characterized in that: in step S1, the extruded web (1) in strip form is placed on a PET release film.
6. The process for simply preparing the directionally ordered carbon fiber heat-conducting composite material in the laboratory according to claim 5 is characterized in that: the extruded strip-shaped base materials (1) are closely arranged one by one according to the thickness direction.
7. The process for simply preparing the directionally ordered carbon fiber heat-conducting composite material in the laboratory according to claim 1 is characterized in that: in step S4, when the assembled sheets (3) are spliced, each row/column is closely arranged, and the gap between adjacent assembled sheets (3) is reduced.
8. The process for simply preparing the directionally ordered carbon fiber heat-conducting composite material in the laboratory according to claim 1 is characterized in that: the side wall of the piston close to the glue outlet is arranged to be a conical surface attached to the inner wall of the glue outlet.
9. The process for simply preparing the directionally ordered carbon fiber heat-conducting composite material in the laboratory according to claim 8 is characterized in that: the conical channel is conical or pyramid-shaped.
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| CN202111482185.0A CN114228205A (en) | 2021-12-06 | 2021-12-06 | Process for simply preparing oriented ordered carbon fiber heat-conducting composite material in laboratory |
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| CN202111482185.0A CN114228205A (en) | 2021-12-06 | 2021-12-06 | Process for simply preparing oriented ordered carbon fiber heat-conducting composite material in laboratory |
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| US20130136895A1 (en) * | 2010-06-17 | 2013-05-30 | Dexerials Corporation | Thermally conductive sheet and process for producing same |
| CN105283952A (en) * | 2013-06-27 | 2016-01-27 | 迪睿合株式会社 | Thermally conductive sheet, method for producing same, and semiconductor device |
| US20190035712A1 (en) * | 2016-01-26 | 2019-01-31 | Dexerials Corporation | Thermally Conductive Sheet, Production Method for Thermally Conductive Sheet, Heat Dissipation Member, and Semiconductor Device |
| CN110229367A (en) * | 2019-05-22 | 2019-09-13 | 深圳市鸿富诚屏蔽材料有限公司 | A kind of anisotropy insulating heat-conductive sheet material and preparation method thereof |
| CN112917872A (en) * | 2021-01-29 | 2021-06-08 | 深圳市鸿富诚屏蔽材料有限公司 | Carbon fiber yarn oil pressure sequencing device and sequencing process |
-
2021
- 2021-12-06 CN CN202111482185.0A patent/CN114228205A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130136895A1 (en) * | 2010-06-17 | 2013-05-30 | Dexerials Corporation | Thermally conductive sheet and process for producing same |
| CN105283952A (en) * | 2013-06-27 | 2016-01-27 | 迪睿合株式会社 | Thermally conductive sheet, method for producing same, and semiconductor device |
| US20190035712A1 (en) * | 2016-01-26 | 2019-01-31 | Dexerials Corporation | Thermally Conductive Sheet, Production Method for Thermally Conductive Sheet, Heat Dissipation Member, and Semiconductor Device |
| CN110229367A (en) * | 2019-05-22 | 2019-09-13 | 深圳市鸿富诚屏蔽材料有限公司 | A kind of anisotropy insulating heat-conductive sheet material and preparation method thereof |
| CN112917872A (en) * | 2021-01-29 | 2021-06-08 | 深圳市鸿富诚屏蔽材料有限公司 | Carbon fiber yarn oil pressure sequencing device and sequencing process |
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Application publication date: 20220325 |