CN115710472A - High-thermal-conductivity adhesive tape with good heat dissipation effect and preparation method thereof - Google Patents
High-thermal-conductivity adhesive tape with good heat dissipation effect and preparation method thereof Download PDFInfo
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- CN115710472A CN115710472A CN202211347303.1A CN202211347303A CN115710472A CN 115710472 A CN115710472 A CN 115710472A CN 202211347303 A CN202211347303 A CN 202211347303A CN 115710472 A CN115710472 A CN 115710472A
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- good heat
- dissipation effect
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- 239000002390 adhesive tape Substances 0.000 title claims abstract description 187
- 230000000694 effects Effects 0.000 title claims abstract description 43
- 230000017525 heat dissipation Effects 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000011347 resin Substances 0.000 claims abstract description 39
- 229920005989 resin Polymers 0.000 claims abstract description 39
- 239000010410 layer Substances 0.000 claims abstract description 29
- 239000002184 metal Substances 0.000 claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- 239000002071 nanotube Substances 0.000 claims abstract description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 21
- 238000003756 stirring Methods 0.000 claims abstract description 21
- 238000000016 photochemical curing Methods 0.000 claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 20
- 239000012790 adhesive layer Substances 0.000 claims abstract description 17
- DCQBZYNUSLHVJC-UHFFFAOYSA-N 3-triethoxysilylpropane-1-thiol Chemical compound CCO[Si](OCC)(OCC)CCCS DCQBZYNUSLHVJC-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 11
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 11
- 239000003292 glue Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000009210 therapy by ultrasound Methods 0.000 claims abstract description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims abstract description 5
- 238000004804 winding Methods 0.000 claims description 93
- 239000000919 ceramic Substances 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 28
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- CYIGRWUIQAVBFG-UHFFFAOYSA-N 1,2-bis(2-ethenoxyethoxy)ethane Chemical compound C=COCCOCCOCCOC=C CYIGRWUIQAVBFG-UHFFFAOYSA-N 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 9
- ZDQNWDNMNKSMHI-UHFFFAOYSA-N 1-[2-(2-prop-2-enoyloxypropoxy)propoxy]propan-2-yl prop-2-enoate Chemical compound C=CC(=O)OC(C)COC(C)COCC(C)OC(=O)C=C ZDQNWDNMNKSMHI-UHFFFAOYSA-N 0.000 claims description 7
- 239000004593 Epoxy Substances 0.000 claims description 7
- -1 cyclohexyl methyl-3, 4-epoxy cyclohexyl Chemical group 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 4
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- 241001391944 Commicarpus scandens Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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- Adhesive Tapes (AREA)
Abstract
The invention relates to the field of adhesive tapes, in particular to a high-thermal-conductivity adhesive tape with a good heat dissipation effect and a preparation method thereof. The heat-conducting adhesive comprises a base material layer and heat-conducting adhesive layers arranged on the upper surface and the lower surface of the base material layer; the heat-conducting adhesive layer is mainly prepared from flaky graphene powder, metal nanotubes, photocuring resin, a photoinitiator, acrylate and 3-mercaptopropyltriethoxysilane. The preparation method comprises the steps of adding the flaky graphene powder and the metal nano tube into the photocuring resin, and carrying out ultrasonic treatment for 20 to 30min; sequentially adding acrylic resin and 3-mercaptopropyltriethoxysilane, and stirring for 0.5 to 1.5 hours; adding a photoinitiator to prepare the heat-conducting glue with the viscosity of over 12000 cps; and uniformly distributing the heat-conducting adhesive on the upper surface and the lower surface of the base layer respectively, and carrying out photocuring to obtain the high-heat-conducting adhesive tape. The invention can enable the heat-conducting adhesive layer to form uniform physical isolation effect, and prevent the problem of long-time viscosity reduction.
Description
Technical Field
The invention relates to the field of adhesive tapes, in particular to a high-thermal-conductivity adhesive tape with a good heat dissipation effect and a preparation method thereof.
Background
The heat-conducting adhesive tape is also called as a heat-conducting double-sided adhesive tape, has the characteristics of high heat conductivity, high viscosity and low thermal impedance, and can effectively replace the characteristics of thermal adhesion and mechanical fixation. The heat dissipation device is used for filling uneven gaps between a heat source and metal products and taking away heat generated by electronic products and the like, so that the effects of cooling and heat dissipation are achieved.
At present, the heat-conducting adhesive tape is easy to age, so that the viscosity is reduced after long-time use; some documents disclose that a photo-curing heat-conductive adhesive tape is used, which accelerates the aging performance of the heat-conductive adhesive tape, although it has good automated dispensing ability and resilience.
Disclosure of Invention
Technical problem to be solved
In view of the above disadvantages and shortcomings of the prior art, the present invention provides a high thermal conductive adhesive tape with good aging resistance and heat dissipation effects, which is prepared by combining graphene flakes, metal nanotubes and resin components, and a preparation method thereof.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
in a first aspect, the invention provides a high thermal conductive adhesive tape with good heat dissipation effect, which comprises a substrate layer and thermal conductive adhesive layers arranged on the upper surface and the lower surface of the substrate layer;
the heat-conducting adhesive layer is mainly prepared from flaky graphene powder, metal nanotubes, photocuring resin, a photoinitiator, acrylate and 3-mercaptopropyltriethoxysilane.
According to the invention, through the combination of the flake graphene powder, the metal nano tube, the acrylate and the 3-mercaptopropyltriethoxysilane, the heat-conducting adhesive layer can form a uniform physical isolation effect, and the influence of the photo-thermal effect and other effects on the viscosity for a long time is prevented. The metal nanotubes may be silver or copper.
Optionally, the heat-conducting adhesive layer comprises the following raw materials in parts by weight:
12-15 parts of flaky graphene powder, 25-32 parts of metal nanotubes, 5-8 parts of photocuring resin, 1-2 parts of photoinitiator, 2-4 parts of acrylic resin and 10-mercaptopropyltriethoxysilane.
The physical isolation effect of the flaky graphene powder and the metal nanotubes influences the photocuring effect of the photocuring resin, but the flaky graphene powder and the metal nanotubes have little influence on the photocuring effect at the above weight ratio, can promote the photocuring to some extent, and can obviously enhance the anti-aging effect.
Optionally, the light-cured resin is prepared from triethylene glycol divinyl ether, tripropylene glycol diacrylate and epoxy cyclohexyl methyl-3, 4-epoxy cyclohexyl formate.
The light-cured resin prepared by the invention can further promote the effect of aging viscosity reduction.
In a second aspect, the invention provides a method for preparing a high thermal conductive adhesive tape with a good heat dissipation effect, which comprises the following steps in sequence:
s1, adding flaky graphene powder and a metal nanotube into a light-cured resin, and carrying out ultrasonic treatment for 20 to 30min;
s2, sequentially adding acrylic resin and 3-mercaptopropyltriethoxysilane, and stirring for 0.5 to 1.5 hours; adding a photoinitiator, and stirring and mixing for 1h to 1.5h to prepare the heat-conducting glue with the viscosity of over 12000 cps;
s3, uniformly distributing heat-conducting glue on the upper surface and the lower surface of the base layer respectively, vacuumizing to 0.1MPa, and stirring for 1-2 hours under the condition of pressure maintaining; and (3) defoaming and discharging in vacuum to obtain the high-thermal-conductivity adhesive tape.
Optionally, the preparation of the photocurable resin comprises the following steps:
sequentially mixing triethylene glycol divinyl ether, tripropylene glycol diacrylate and epoxy cyclohexyl methyl-3, 4-epoxy cyclohexyl formate, heating to 45-55 ℃ for each mixing, and stirring for 30-35min to obtain the light-cured resin.
Optionally, after a high-thermal-conductivity adhesive tape with a good heat dissipation effect is obtained, winding the adhesive tape by using an adhesive tape winding auxiliary device, wherein the adhesive tape winding auxiliary device comprises a winding drum, a winding paper ring detachably sleeved outside the winding drum, an adhesive tape winding thickness measuring mechanism and an adhesive tape leveling exhaust mechanism; the adhesive tape flattening exhaust mechanism comprises an attaching plate, a plurality of first high-precision hydraulic cylinders for driving the attaching plate to move, a guide roller for guiding the adhesive tape to be wound and a second high-precision hydraulic cylinder for driving the guide roller to move; the attaching plate can change shape along with the increase of the thickness of the adhesive tape roll so that the attaching plate can be attached to the surface of the adhesive tape roll all the time; the telescopic rod end of the first high-precision hydraulic cylinder is hinged to the attachment plate, and the cylinder body end is hinged to the fixed seat; and the telescopic rod end of the second high-precision hydraulic cylinder is respectively and rotatably connected with the two ends of the guide roller, and the cylinder body end is fixed on the fixed seat.
Optionally, the attachment plate includes a deformation component and an elastic protection layer covering the deformation component; the deformation assembly comprises a first piezoelectric ceramic array, an elastic resin plate and a second piezoelectric ceramic array which are sequentially arranged from one side close to the adhesive tape roll to the outside; the first piezoelectric ceramic array and the second piezoelectric ceramic array are respectively controlled by a circuit to extend or shorten along the rolling direction, and the length change directions of the first piezoelectric ceramic array and the second piezoelectric ceramic array are opposite.
Optionally, a sponge thin layer is adhered to one side of the adhesive tape roll of the attaching plate; the density of the sponge thin layer is gradually increased backwards by the adhesive tape, so that the extrusion force applied when the adhesive tape is wound is gradually increased backwards by the adhesive tape.
Optionally, when not being rolled, the first high-precision hydraulic cylinders are respectively perpendicular to the attachment plates.
Optionally, one or more miniature pressure sensing pieces are embedded in the rear portion of one surface of the attaching plate, which is attached to the adhesive tape roll.
Optionally, the adhesive tape roll winding thickness measuring mechanism comprises a laser emitter or an infrared emitter fixedly arranged on one side of the roll paper ring; the laser emitter or the infrared emitter is inclined to the surface of the adhesive tape roll to emit laser or infrared rays; a receiving lens and a CCD detector are sequentially arranged along the light path within the laser or infrared reflection range; the CCD detector detects the position of the light spot to calculate the thickness variation of the adhesive tape roll.
Optionally, the end of the attaching plate facing the adhesive tape is provided with a slope to match with the guide roller so as to enable the adhesive tape to have a proper rolling angle.
The auxiliary method of the adhesive tape winding auxiliary device comprises the following steps:
(1) before winding, a winding paper ring is sleeved outside a winding cylinder, and the end part of the adhesive tape is adhered to the winding position of the winding paper ring; the controller controls the first high-precision hydraulic cylinder to lift the attaching plate according to a preset angle, so that the attaching plate is attached to the outer surface of the rolled paper ring, and when the pressure monitored by the miniature pressure sensing piece exceeds a set threshold value, the first high-precision hydraulic cylinder is stopped; the controller controls the second high-precision hydraulic cylinder to drive the guide roller to be lifted to a preset height; the controller measures and records the thickness at the moment through the adhesive tape roll winding thickness measuring mechanism, and the thickness is set to be zero;
(2) when winding is started, the winding paper ring is driven by the winding cylinder to rotate and wind the adhesive tape, and in the process, the adhesive tape is guided by the guide roller and then is attached and wound between the attaching plate and the winding paper ring; the extrusion force applied when the adhesive tape is rolled is gradually increased backwards by the adhesive tape, so that the action effect of gradually smoothing the adhesive tape caused by rolling the adhesive tape backwards is generated, the action effect is favorable for uniformly flattening the adhesive tape, air can be gradually extruded outwards, and the air is prevented from being pressed into the adhesive tape to form bubbles;
(3) the thickness of the adhesive tape roll is gradually increased along with the winding of the adhesive tape, the process is detected in real time through an adhesive tape roll winding thickness measuring mechanism, and the controller controls the height position and the overall shape of the attaching plate through the first high-precision hydraulic cylinder according to the thickness change of the adhesive tape roll and corresponding control parameters under different preset adhesive tape roll thicknesses; controlling the height of the guide roller through a second high-precision hydraulic cylinder to obtain a proper guide angle; bending the elastic resin plate by controlling the first piezoelectric ceramic array and the second piezoelectric ceramic array to extend or shorten one of the first piezoelectric ceramic array and the second piezoelectric ceramic array so as to adjust the curvature of the attaching plate and attach the attaching plate to the surface of the adhesive tape roll in real time; meanwhile, the controller compares the pressure value signal transmitted by the miniature pressure sensing piece in real time with a set value, and correspondingly fine-tunes the parameters when the pressure value signal exceeds the threshold value.
(III) advantageous effects
The invention has the beneficial effects that:
1. according to the invention, through the combination of the flake graphene powder, the metal nano tube, the light curing resin, the photoinitiator, the acrylate and the 3-mercaptopropyltriethoxysilane, the heat-conducting adhesive layer can form a uniform physical isolation effect, and the problem of long-time viscosity reduction is prevented from being overcome.
2. The adhesive tape rolling auxiliary device utilizes the attaching plate to attach the surface of the adhesive tape roll, and the attaching extrusion force of the attaching plate applied when the adhesive tape is rolled is gradually increased backwards by the adhesive tape, so that the action effect of gradually leveling the adhesive tape roll by the adhesive tape in the direction of rolling the adhesive tape is generated; this rolling auxiliary device simple structure, operation are stable, can show improvement sticky tape rolling quality, and degree of automation is high.
3. In the prior art, when the adhesive tape is wound, balance is difficult to generate between adhesive tape adhesion and air extrusion and a flat surface, the existing extrusion roller can only generate line contact with the surface of an adhesive tape roll, accurate debugging is needed, the adhesive tape can be rolled into air to form bubbles before the extrusion point of the pressure roller and the adhesive tape roll passes, and the adhesive tape can be accumulated behind the pressure point to form wave-shaped fluctuation, so that a large tensile stress is needed to be applied to the adhesive tape when the adhesive tape is wound, and the situation can be reduced without applying a large tensile strength to the adhesive tape when the adhesive tape is wound in the prior art, but on one hand, the thickness of the adhesive tape roll is changed all the time in the winding process, so that the situation still occurs in the winding process even after the adhesive tape is debugged, the adhesive tape can bear an extra tensile stress, the storage and service life of the adhesive tape are reduced, the strength is reduced, and the adhesive tape rolls are tightened due to mutual bearing tension between layers of the adhesive tapes after the winding, so that the adhesive tape rolls are over-sounding and easy to break when the adhesive tapes are torn; the application utilizes the outward floating action which is completely different from the existing rolling and extruding mode, and completely overcomes the defects and contradictions existing in the prior art.
4. The adhesive tape winding thickness measuring mechanism disclosed by the invention can enlarge the measuring structure by utilizing an angle measuring mode, so that more accurate thickness measurement is realized, and accurate regulation and control data are provided for adjusting the real-time attaching and floating action of the attaching plate in the adhesive tape winding process.
5. The controller controls the height position and the overall shape of the attaching plate through the first high-precision hydraulic cylinder according to the thickness change of the adhesive tape roll and corresponding control parameters under different preset adhesive tape roll thicknesses; the height of the guide roller is controlled through a second high-precision hydraulic cylinder so as to obtain a proper guide angle; bending the elastic resin plate by controlling the first piezoelectric ceramic array and the second piezoelectric ceramic array to extend or shorten one of the first piezoelectric ceramic array and the second piezoelectric ceramic array so as to adjust the curvature of the attaching plate and attach the attaching plate to the surface of the adhesive tape roll in real time; meanwhile, the controller compares a pressure value signal transmitted by the miniature pressure induction sheet in real time with a set value, and correspondingly fine-tunes the parameter when the pressure value signal exceeds a threshold value; the full automatic adjustment can be realized according to the thickness change of the adhesive tape roll, the flexibility, the accuracy and the standardization are considered, the stable and accurate operation and adjustment can be realized, the frequent debugging and monitoring of workers are not needed, and the production efficiency and the product quality can be obviously improved and maintained in large-scale production; and due to the large-scale and standardized production mode of the factory, various optimal adjustment parameters can be obtained by utilizing a plurality of tests outside the field in advance, once the optimal parameters are obtained, the optimal parameters can be continuously applied in the large-scale production process, and the parameters do not need to be adjusted frequently.
Drawings
FIG. 1 is a process flow diagram of examples 1-3 of the present invention;
FIG. 2 is a schematic structural view of the auxiliary device for winding adhesive tape of the present invention when it is just started to wind;
FIG. 3 is a schematic structural view of the auxiliary device for winding adhesive tape according to the present invention when the winding is completed;
FIG. 4 is a side cross-sectional schematic view of an attachment plate of the present invention;
FIG. 5 is a schematic view of the construction of the take-up spool of the present invention;
FIG. 6 is a schematic view of the unwinding roll of the present invention in an expanded configuration;
FIG. 7 is a schematic structural view of the winding drum of the present invention after being fitted with a fixing strap;
FIG. 8 is an external view of a roll of the present invention with a cut-out depression reserved therein.
In the figure:
1. winding the roll; 2. winding a paper ring; 3. a tape roll winding thickness measuring mechanism; 31. a laser emitter or an infrared emitter; 32. a receiving lens; 33. a CCD detector; 4. an adhesive tape flattening and exhausting mechanism; 41. attaching a plate; 411. a first piezoelectric ceramic array; 412. an elastic resin plate; 413. a second piezoelectric ceramic array; 414. an elastic protective layer; 415. a thin layer of sponge; 416. a miniature pressure sensing sheet; 42. a first high-precision hydraulic cylinder; 43. a guide roller; 44. a second high-precision hydraulic cylinder; 51. a tube body; 52. penetrating the strip-shaped holes; 53. a slider; 531. a ball bearing; 54. a cambered surface expanding plate; 541. a first permanent magnet; 542. a second permanent magnet; 55. a stepped rotary arm sleeve; 56. a swing arm; 561. a cambered surface groove; 57. a central rotating shaft; 571. a chute; 572. a sliding key; 58. fixing the sleeve strip; 581. a transverse plate; 582. a vertical plate; 58. fixing the sleeve strip; 581. a transverse plate; 582. a riser.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present invention by way of specific embodiments thereof.
With reference to figure 1 of the drawings,
example 1
The embodiment provides a high-thermal-conductivity adhesive tape with a good heat dissipation effect, which comprises a base material layer and thermal-conductivity adhesive layers arranged on the upper surface and the lower surface of the base material layer;
the heat-conducting adhesive layer is mainly prepared from 12 parts by weight of flake graphene powder, 32 parts by weight of metal nanotubes, 5 parts by weight of photocuring resin, 2 parts by weight of photoinitiator, 2 parts by weight of acrylic resin and 15 parts by weight of 3-mercaptopropyltriethoxysilane;
the preparation method comprises the following steps of:
s1, preparation of light-cured resin: sequentially mixing triethylene glycol divinyl ether, tripropylene glycol diacrylate and epoxy cyclohexyl methyl-3, 4-epoxy cyclohexyl formic ether according to the weight ratio of 1: 2: 1.5: 3, heating to 45 ℃ for each mixing, and stirring for 35min to obtain the light-cured resin;
s2, adding the flaky graphene powder and the metal nano tube in parts by weight into the photocuring resin, and performing ultrasonic treatment for 20min;
s3, sequentially adding acrylic resin and 3-mercaptopropyltriethoxysilane, and stirring for 1.5h; adding a photoinitiator, stirring and mixing for 1hh to prepare the heat-conducting glue with the viscosity of over 12000 cps;
s4, uniformly distributing heat-conducting glue on the upper surface and the lower surface of the base layer respectively, vacuumizing to 0.1MPa, and maintaining pressure and stirring for 1-2 hours; and (3) defoaming and discharging in vacuum to obtain the high-thermal-conductivity adhesive tape.
The high thermal conductive adhesive tape of the embodiment is cured on a target object by ultraviolet light curing treatment with the wavelength of 350 nm.
Example 2
The embodiment provides a high-thermal-conductivity adhesive tape with a good heat dissipation effect, which comprises a substrate layer and thermal-conductivity adhesive layers arranged on the upper surface and the lower surface of the substrate layer;
the heat-conducting adhesive layer is mainly prepared from 14 parts by weight of flake graphene powder, 29 parts by weight of metal nano tubes, 6 parts by weight of photocuring resin, 1.5 parts by weight of photoinitiator, 3 parts by weight of acrylic resin and 13 parts by weight of 3-mercaptopropyltriethoxysilane;
the preparation method comprises the following steps in sequence:
s1, preparation of light-cured resin: sequentially mixing triethylene glycol divinyl ether, tripropylene glycol diacrylate and epoxy cyclohexyl methyl-3, 4-epoxy cyclohexyl formate according to the weight ratio of 2: 1: 2: 1, heating to 50 ℃ for each mixing, and stirring for 33min to obtain the light-cured resin;
s2, adding the flaky graphene powder and the metal nano tubes in parts by weight into the photo-curing resin, and carrying out ultrasonic treatment for 25min;
s3, sequentially adding acrylic resin and 3-mercaptopropyltriethoxysilane, and stirring for 1h; adding a photoinitiator, stirring and mixing for 1.2h to prepare the heat-conducting glue with the viscosity of over 12000 cps;
s4, uniformly distributing heat-conducting glue on the upper surface and the lower surface of the base layer respectively, vacuumizing to 0.1MPa, and stirring for 1-2 hours under the condition of pressure maintaining; and (3) defoaming and discharging in vacuum to obtain the high-thermal-conductivity adhesive tape.
The high thermal conductive adhesive tape of the embodiment is cured on a target object by ultraviolet light curing treatment with the wavelength of 350 nm.
Example 3
The embodiment provides a high-thermal-conductivity adhesive tape with a good heat dissipation effect, which comprises a base material layer and thermal-conductivity adhesive layers arranged on the upper surface and the lower surface of the base material layer;
the heat-conducting adhesive layer is mainly prepared from 15 parts by weight of flaky graphene powder, 25 parts by weight of metal nano tubes, 8 parts by weight of photocuring resin, 1 part by weight of photoinitiator, 4 parts by weight of acrylic resin and 10 parts by weight of 3-mercaptopropyltriethoxysilane;
the preparation method comprises the following steps of:
s1, preparation of light-cured resin: sequentially mixing triethylene glycol divinyl ether, tripropylene glycol diacrylate and epoxy cyclohexyl methyl-3, 4-epoxy cyclohexyl formate according to the weight ratio of 1.5: 1: 1.2: 2, heating to 55 ℃ for each mixing, and stirring for 30min to obtain the photocuring resin;
s2, adding the flaky graphene powder and the metal nano tube in parts by weight into the photocuring resin, and performing ultrasonic treatment for 30min;
s3, sequentially adding acrylic resin and 3-mercaptopropyltriethoxysilane, and stirring for 0.5h; adding a photoinitiator, stirring and mixing for 1.5h to prepare the heat-conducting glue with the viscosity of over 12000 cps;
s4, uniformly distributing heat-conducting glue on the upper surface and the lower surface of the base layer respectively, vacuumizing to 0.1MPa, and stirring for 1-2 hours under the condition of pressure maintaining; and (3) defoaming and discharging in vacuum to obtain the high-thermal-conductivity adhesive tape.
The high thermal conductive adhesive tape of the embodiment is cured on a target object by ultraviolet light curing treatment with a wavelength of 350 nm.
Comparative example 1
A method for preparing a high thermal conductive adhesive tape with a good heat dissipation effect, which is similar to embodiment 1, and is different in that: no metal nanotubes were added.
Comparative example 2 a method for preparing a high thermal conductive tape having a good heat dissipation effect, which is the same as example 1, is different in that:
no graphene flake powder was added.
Comparative example 3
A method for preparing a high thermal conductive adhesive tape with a good heat dissipation effect, which is similar to embodiment 1, and is different in that:
triethylene glycol divinyl ether was not added to the photocurable resin.
The aging resistance test result shows that:
after 500 aging treatments, the viscosity reduction rate of the high thermal conductive adhesive tape of example 1 was 13.6%;
after the high thermal conductive adhesive tape of comparative example 1 is aged for 500 times, the viscosity reduction rate is 25.8%;
after 500 aging treatments, the viscosity reduction rate of the high thermal conductive adhesive tape of the comparative example 2 is 32.2%;
after 500 aging treatments, the viscosity reduction rate of the high thermal conductive adhesive tape of comparative example 3 was 33.6%;
from the above, the addition of the metal nanotubes, the graphene flake powder and the triethylene glycol divinyl ether in the invention has a significant influence on the aging resistance of the adhesive tape.
Further, referring to fig. 2-4, after a high thermal conductive adhesive tape with a good heat dissipation effect is obtained, an adhesive tape winding auxiliary device is used for winding the adhesive tape, wherein the adhesive tape winding auxiliary device comprises a winding drum 1, a winding paper ring 2 detachably sleeved outside the winding drum 1, an adhesive tape winding thickness measuring mechanism 3 and an adhesive tape leveling and exhausting mechanism 4; the adhesive tape leveling and exhausting mechanism 4 comprises an attaching plate 41, a plurality of first high-precision hydraulic cylinders 42 for driving the attaching plate 41 to move, a guide roller 43 for guiding the winding of the adhesive tape and a second high-precision hydraulic cylinder 44 for driving the guide roller 43 to move; the attaching plate 41 can change shape along with the increase of the thickness of the adhesive tape roll so that the attaching plate can be attached to the surface of the adhesive tape roll all the time; the telescopic rod end of the first high-precision hydraulic cylinder 42 is hinged to the attachment plate 41, and the cylinder body end is hinged to the fixed seat; the telescopic rod ends of the second high-precision hydraulic cylinders 44 are rotatably connected with the two ends of the guide roller 43 respectively, and the cylinder body ends are fixed on the fixed seats.
Further, the attachment plate 41 includes a deformation component and an elastic protection layer 414 covering the deformation component; the deformation component comprises a first piezoelectric ceramic array 411, an elastic resin plate 412 and a second piezoelectric ceramic array 413 which are arranged from one side close to the adhesive tape roll to the outside in sequence; the first piezoelectric ceramic array 411 and the second piezoelectric ceramic array 413 are respectively controlled by a circuit to extend or contract along the rolling direction, and the length change directions of the first piezoelectric ceramic array 411 and the second piezoelectric ceramic array 413 are opposite.
Further, a sponge thin layer 415 is adhered to one side of the attaching plate 41, which is attached to the adhesive tape roll; the density of the sponge thin layer 415 is gradually increased backwards by the adhesive tape, so that the pressing force applied when the adhesive tape is wound is gradually increased backwards by the adhesive tape.
Further, when not being rolled, the first high-precision hydraulic cylinders 44 are perpendicular to the attachment plates 41, respectively.
Furthermore, one or a plurality of micro pressure-sensitive sheets 416 are embedded in the rear portion of the side of the attaching plate 41 to which the tape roll is attached.
Further, the adhesive tape roll winding thickness measuring mechanism 3 comprises a laser emitter or an infrared emitter 31 fixedly arranged on one side of the winding paper ring 2; the laser emitter or the infrared emitter 31 emits laser or infrared rays obliquely to the surface of the adhesive tape roll; a receiving lens 32 and a CCD detector 33 are sequentially arranged along the light path within the laser or infrared reflection range; the CCD detector 33 detects the position of the light spot to calculate the tape roll thickness variation.
Further, the end of the attaching plate 41 facing the tape is provided with a slope to match with the guiding roller 43 to make the tape have a proper winding angle.
Further, the auxiliary method of the adhesive tape winding auxiliary device comprises the following steps:
(1) before winding, the winding paper ring 2 is sleeved outside the winding drum 1, and the end part of the adhesive tape is adhered to the winding position of the winding paper ring 1; the controller controls the first high-precision hydraulic cylinder 42 to lift the attaching plate 41 according to a preset angle, so that the attaching plate 41 is attached to the outer surface of the winding paper ring 2, and when the pressure monitored by the miniature pressure sensing piece 416 exceeds a set threshold value, the first high-precision hydraulic cylinder 42 is stopped; the controller controls the second high-precision hydraulic cylinder 44 to drive the guide roller 43 to lift to a preset height; the controller measures and records the thickness at the moment through the adhesive tape roll winding thickness measuring mechanism 3, and the thickness is set to be zero;
(2) when winding is started, the winding drum 1 drives the winding paper ring 2 to rotate and wind the adhesive tape, and in the process, the adhesive tape is guided by the guide roller 43 and then is attached and wound between the attaching plate 41 and the winding paper ring 2; the extrusion force applied when the adhesive tape is rolled is gradually increased backwards by the adhesive tape, so that the action effect of gradually smoothing the adhesive tape caused by rolling the adhesive tape backwards is generated, the action effect is favorable for uniformly flattening the adhesive tape, air can be gradually extruded outwards, and the air is prevented from being pressed into the adhesive tape to form bubbles;
(3) the thickness of the adhesive tape roll is gradually increased along with the winding of the adhesive tape, the process is detected in real time by the adhesive tape roll winding thickness measuring mechanism 3, and the controller controls the height position and the overall shape of the attaching plate 41 through the first high-precision hydraulic cylinder 42 according to the thickness change of the adhesive tape roll and corresponding control parameters under different preset adhesive tape roll thicknesses; the height of the guide roller 43 is controlled by the second high-precision hydraulic cylinder 44 to obtain a proper guide angle; bending the elastic resin plate 412 by controlling the first piezoelectric ceramic array 411 and the second piezoelectric ceramic array 413 to extend and contract one of them to adjust the curvature of the attaching plate 41 to attach it to the surface of the tape roll in real time; meanwhile, the controller compares the pressure value signal transmitted by the miniature pressure sensing piece 416 in real time with a set value, and correspondingly fine-tunes the parameter when the pressure value signal exceeds the threshold value.
Further, referring to fig. 5 to 8, the winding reel 1 includes a tubular body 51; a plurality of through strip-shaped holes 52 are uniformly formed in the pipe body 51 along the radial direction; the longitudinal direction of the through-hole 52 is parallel to the axis of the pipe body 51; sliding blocks 53 are respectively penetrated through the through strip-shaped holes 52 in a sliding manner; the outer ends of the sliding blocks 53 outside the pipe body 51 are respectively and fixedly provided with cambered surface expanding plates 54; a plurality of balls 531 are embedded in the inner end of the sliding block 53 in the pipe body 51 along the length direction; a driving mechanism for driving the sliding block 53 to slide outwards is arranged in the pipe body 51; the driving mechanism comprises a central rotating shaft 57 and a step rotating arm sleeve 55 which is detachably sleeved outside the central rotating shaft 57; one surface of the arm 56 of the step arm sleeve 55 facing the rotation direction when the central rotating shaft 57 is wound is a vertical surface, and the other surface is an inclined step surface having a plurality of step surfaces; a cambered surface groove 561 is arranged on the step surface of the step surface, and the adjacent step surfaces are smoothly connected through a cambered surface; when the step arm sleeve 55 is rotated in a direction opposite to the rotating direction when the central rotating shaft 57 is wound, the ball 531 receives two component forces facing the step surface and facing radially downward, so that the ball 531 rolls along the step surface and drives the sliding block 53 to move radially outward to expand the arc surface expanding plate 54 outward; the winding drum 1 further comprises a plurality of fixed straps 58 corresponding to the stair positions; the radial section of the fixed loop bar 58 is T-shaped, the transverse plate 581 of the T-shaped fixed loop bar 58 has a radian matched with the inner wall of the pipe body 51, and two ends of the transverse plate simultaneously abut against the side surfaces of two adjacent sliding blocks 53; the vertical plate 582 of the T-shaped fixing strap 58 abuts inward against the outer surface of the step arm cover 55 and abuts on the vertical surface of the step arm cover 55 on one side to lock the step arm cover 55 after the step arm cover 55 adjusts the outward movement degree of the slide block 53.
Further, a plurality of first permanent magnets 541 are embedded in the inner surface of the arc expanding plate 54; a plurality of second permanent magnets 542 are embedded on the outer circumferential surface of the pipe body 51 corresponding to the first permanent magnets 541 respectively; the opposing surfaces of the first permanent magnet 541 and the second permanent magnet 542 attract each other in opposite directions to prevent the arc expanding plate 54 from falling off in a normal state.
Further, a plurality of sliding grooves 571 are formed in the outer circumferential surface of the central rotating shaft 57 along the length direction; a plurality of sliding keys 572 are provided on the inner circumferential surface of the step rotating arm sleeve 55 along the length direction thereof corresponding to the sliding grooves 571; the sliding key 572 and the sliding slot 571 may be detachably slidably sleeved along the length direction to rotate the central shaft 57 and the step arm sleeve 55 in a linked manner.
Further, the use method of the winding drum 1 comprises the following steps:
(1) inserting the tube body 51 into the winding paper ring 2, inserting the applicable step rotary arm sleeve 55 into the tube body 51 after sequentially inserting and matching with the central rotating shaft 57; in the inserting process, the through strip-shaped hole 52 penetrates through the groove between two adjacent spiral arms 56, so that the stepped spiral arm sleeve 55 is smoothly inserted into the pipe body 51; if the convenience of later-stage cutting of the adhesive tape roll needs to be considered, a non-rotating-arm sleeve with a certain width can be sleeved between two or more adjacent stepped rotating-arm sleeves 55 according to the width of the adhesive tape roll to be cut, so that an unsprung part can be formed at a certain distance, and the collision and abrasion between a blade and the cambered surface unfolding plate 54 can be avoided during the subsequent cutting of the adhesive tape roll;
(2) the arm sleeve 55 rotates towards one side of the stepped surface, and the ball 531 receives two component forces which face the stepped surface and are downward in the radial direction, so that the ball 531 rolls and climbs along the stepped surface and drives the sliding block 53 to move outwards in the radial direction to expand the cambered surface expanding plate 54 outwards; the ball 531 climbs to a proper step surface corresponding to the inner diameter of the paper winding ring 2 and is embedded into the cambered groove 561; at the moment, the cambered surface opening plate 54 tightly supports the rolled paper ring 2 from inside to outside;
(3) selecting corresponding fixed straps 58 to be respectively inserted between two adjacent spiral arms 56 according to the step surface where the ball 531 climbs; the horizontal plate 581 of the T-shaped fixed strap 58 has a radian matched with the inner wall of the tube body 51, and two ends of the horizontal plate simultaneously abut against the side surfaces of two adjacent sliding blocks 53; the vertical plate 582 of the T-shaped fixed lath 58 is inwards abutted against the outer surface of the step rotary arm sleeve 55, and one side of the T-shaped fixed lath is abutted against the vertical surface of the step rotary arm sleeve 55 so as to lock the step rotary arm sleeve 55;
(4) the central rotating shaft 57 drives the stepped rotating arm sleeve 55 to rotate towards one side of the vertical plane, and further drives the sliding block 53 through the fixed sleeve strip 58, and further drives the tube body 51 and the arc opening plate 54 to rotate through the sliding block 53, and further drives the winding paper ring 2 to rotate to wind the adhesive tape;
(5) after winding, the winding drum 1 is taken down, the fixing sleeve strip 58 is drawn out, one hand holds the surface of the adhesive tape roll, the other hand drives the step rotating arm sleeve 55 to rotate towards one side of the vertical plane of the step rotating arm sleeve through the central rotating shaft 57, so that the ball 531 rolls down along the step surface, the sliding block 53 moves inwards, and in the process, the cambered surface opening plate 54 moves towards the surface of the pipe body 51 and retracts under the suction action of the first permanent magnet 541 and the second permanent magnet 542 until being attached to the surface of the pipe body 51 again; at this time, the cambered surface opening plate 54 loses the support of the winding paper ring 2, and the winding paper ring 2 and the adhesive tape roll wound thereon can be easily taken down for subsequent processing.
With the above roll 1, it has the following advantages: the universal winding device has universality, the diameter of an outer support can be adjusted according to winding paper rings with different sizes, only corresponding fixed sleeve strips need to be selected according to step surfaces corresponding to different support diameters, and a central rotating shaft, a step rotating arm sleeve, a pipe body and the like can be universal, so that the diversification and the generalization of production products are realized, the relatively high cost can be saved for enterprises in a long term, and winding drums with different sizes do not need to be frequently adopted for developing new products; the winding drum is convenient to adjust, stable and firm in operation, and can conveniently and quickly separate the wound adhesive tape roll; the supporting stability when the rolling paper ring is rolled and the convenient separation of the rolled adhesive tape roll after the rolling are both realized, and the production efficiency of workers can be effectively improved.
The sliding block is used for driving the cambered surface opening plate to open and retract, the step rotating arm sleeve and the rolling climbing action of the balls are used for driving the sliding block to move outwards and the cambered surface opening plate to open, the vertical surface designed on the rotating arm is matched with the fixed sleeve strip to realize stable linkage rotation, the step surface is provided with a step surface and a cambered surface groove, and the adjacent step surfaces are smoothly connected through the cambered surface, so that the smooth climbing of the balls is considered, and the stable staying of the balls on the step surface can be kept; the first permanent magnet and the second permanent magnet that the utilization was inlayed and is established can reach the stable attached of cambered surface spreader plate under simple and convenient realization normality, avoid droing, but also can provide the power of replying for sliding block and ball when making cambered surface spreader plate retract, make heavy going on smoothly in sliding block and the ball, reduce operating personnel's the operation degree of difficulty.
The ladder swing arm sleeves can be in multi-section type, a certain number of ladder swing arm sleeves are rotated according to the required length during assembly and are sequentially inserted and matched with the central rotating shaft, if the convenience of later-stage cutting of the adhesive tape roll is required to be considered, a non-swing arm sleeve barrel with a certain width can be sleeved between two or more adjacent ladder swing arm sleeves to be sleeved according to the width of the adhesive tape roll to be cut, and therefore an unsprung part can be formed at a certain interval, and the collision and abrasion of a blade and the cambered surface unfurling plate can be avoided during subsequent cutting of the adhesive tape roll; not only improved cutting efficiency, but also can be integrated on the rolling equipment with cutting equipment, cut immediately after the rolling is accomplished, ensured cutting quality and precision, improved equipment integration degree, reduce manual operation process, further improve production efficiency.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A high heat conduction adhesive tape with good heat dissipation effect is characterized by comprising a base material layer and heat conduction adhesive layers arranged on the upper surface and the lower surface of the base material layer;
the heat-conducting adhesive layer is mainly prepared from flake graphene powder, a metal nano tube, photocuring resin, a photoinitiator, acrylate and 3-mercaptopropyltriethoxysilane.
2. A highly thermally conductive adhesive tape with good heat dissipation effect as defined in claim 1, wherein the thermally conductive adhesive layer comprises the following raw materials in parts by weight:
12-15 parts of flaky graphene powder, 25-32 parts of metal nanotubes, 5-8 parts of photocuring resin, 1-2 parts of photoinitiator, 2-4 parts of acrylic resin and 10-mercaptopropyltriethoxysilane.
3. A highly thermally conductive adhesive tape having a good heat dissipating effect as claimed in claim 2, wherein: the light-cured resin is prepared from triethylene glycol divinyl ether, tripropylene glycol diacrylate and epoxy cyclohexyl methyl-3, 4-epoxy cyclohexyl formate.
4. A preparation method of a high thermal conductive adhesive tape with good heat dissipation effect as defined in claim 1, which comprises the following steps in sequence:
s1, adding flaky graphene powder and a metal nano tube into a photo-curing resin, and carrying out ultrasonic treatment for 20 to 30min;
s2, sequentially adding acrylic resin and 3-mercaptopropyltriethoxysilane, and stirring for 0.5 to 1.5 hours; adding a photoinitiator, and stirring and mixing for 1h to 1.5h to prepare the heat-conducting glue with the viscosity of over 12000 cps;
s3, uniformly distributing heat-conducting glue on the upper surface and the lower surface of the base layer respectively, vacuumizing to 0.1MPa, and maintaining pressure and stirring for 1-2 hours; and (3) defoaming and discharging in vacuum to obtain the high-thermal-conductivity adhesive tape.
5. The method for preparing a high thermal conductive adhesive tape with good heat dissipation effect as defined in claim 4, wherein the preparation of the photocurable resin comprises the following steps:
sequentially mixing triethylene glycol divinyl ether, tripropylene glycol diacrylate and epoxy cyclohexyl methyl-3, 4-epoxy cyclohexyl formate, heating to 45-55 ℃ for each mixing, and stirring for 30-35min to obtain the light-cured resin.
6. The method for preparing the high thermal conductive tape with good heat dissipation effect according to claim 3, wherein after the high thermal conductive tape with good heat dissipation effect is obtained, a tape winding auxiliary device is used for winding the tape, and the tape winding auxiliary device comprises a winding drum (1), a winding paper ring (2) detachably sleeved outside the winding drum (1), a tape winding thickness measuring mechanism (3) and a tape flattening exhaust mechanism (4); the adhesive tape leveling and exhausting mechanism (4) comprises an attaching plate (41), a plurality of first high-precision hydraulic cylinders (42) for driving the attaching plate (41) to move, a guide roller (43) for guiding the adhesive tape to be wound and a second high-precision hydraulic cylinder (44) for driving the guide roller (43) to move; the attaching plate (41) can change shape along with the increase of the thickness of the adhesive tape roll so that the attaching plate can be attached to the surface of the adhesive tape roll all the time; the telescopic rod end of the first high-precision hydraulic cylinder (42) is hinged to the attachment plate (41), and the cylinder body end is hinged to the fixed seat; and the telescopic rod end of the second high-precision hydraulic cylinder (44) is respectively and rotatably connected with the two ends of the guide roller (43), and the cylinder body end is fixed on the fixed seat.
7. The method for preparing the highly heat-conductive adhesive tape with good heat dissipation effect as claimed in claim 6, wherein the attachment plate (41) comprises a deformation component and an elastic protection layer (414) covering the deformation component; the deformation assembly comprises a first piezoelectric ceramic array (411), an elastic resin plate (412) and a second piezoelectric ceramic array (413) which are sequentially arranged from one side close to the adhesive tape roll to the outside; the first piezoelectric ceramic array (411) and the second piezoelectric ceramic array (413) are respectively controlled by a circuit to extend or shorten along the rolling direction, and the length change directions of the first piezoelectric ceramic array (411) and the second piezoelectric ceramic array (413) are opposite.
8. The method for preparing a high thermal conductive tape with good heat dissipation effect as claimed in claim 6, wherein a sponge thin layer (415) is adhered to one side of the attachment plate (41) to which the tape roll is attached; the density of the sponge thin layer (415) is gradually increased backwards by the adhesive tape, so that the extrusion force applied when the adhesive tape is wound is gradually increased backwards by the adhesive tape; when the adhesive tape is not rolled, the first high-precision hydraulic cylinders (44) are respectively vertical to the attaching plates (41); one or a plurality of miniature pressure sensing pieces (416) are embedded at the rear part of one surface of the attaching plate (41) attached with the adhesive tape roll; the end part of the attaching plate (41) facing the adhesive tape is provided with a slope to match with a guide roller (43) so that the adhesive tape has a proper rolling angle.
9. The method for preparing the high thermal conductive adhesive tape with good heat dissipation effect according to claim 6, wherein the adhesive tape roll-up thickness measuring mechanism (3) comprises a laser emitter or an infrared emitter (31) fixedly arranged on one side of the roll-up paper ring (2); the laser emitter or the infrared emitter (31) emits laser or infrared rays to the surface of the adhesive tape roll in an inclined mode; a receiving lens (32) and a CCD detector (33) are sequentially arranged along the light path within the laser or infrared reflection range; a CCD detector (33) detects the position of the light spot to calculate the thickness variation of the tape roll.
10. The method for preparing a high thermal conductive adhesive tape with good heat dissipation effect as defined in claim 6, wherein the auxiliary method of the adhesive tape winding auxiliary device comprises the following steps:
(1) before winding, the winding paper ring (2) is sleeved outside the winding drum (1), and the end part of the adhesive tape is adhered to the winding position of the winding paper ring (1); the controller controls the first high-precision hydraulic cylinder (42) to lift the attaching plate (41) according to a preset angle, so that the attaching plate (41) is attached to the outer surface of the winding paper ring (2), and when the pressure monitored by the miniature pressure sensing piece (416) exceeds a set threshold value, the first high-precision hydraulic cylinder (42) is stopped; the controller controls a second high-precision hydraulic cylinder (44) to drive the guide roller (43) to lift to a preset height; the controller measures and records the thickness at the moment through the adhesive tape roll winding thickness measuring mechanism (3), and the thickness is set to be zero;
(2) when the winding is started, the winding cylinder (1) drives the winding paper ring (2) to rotate and wind the adhesive tape, and in the process, the adhesive tape is guided by the guide roller (43) and then is attached and wound between the attaching plate (41) and the winding paper ring (2); the extrusion force applied when the adhesive tape is rolled is gradually increased backwards by the adhesive tape, so that the action effect of gradually smoothing the adhesive tape caused by rolling the adhesive tape backwards is generated, the action effect is favorable for uniformly flattening the adhesive tape, air can be gradually extruded outwards, and the air is prevented from being pressed into the adhesive tape to form bubbles;
(3) the thickness of the adhesive tape roll is gradually increased along with the winding of the adhesive tape, the process is detected in real time through an adhesive tape roll winding thickness measuring mechanism (3), and the height position and the overall shape of the attaching plate (41) are controlled by the controller through the first high-precision hydraulic cylinder (42) according to the thickness change of the adhesive tape roll and corresponding control parameters under different preset adhesive tape roll thicknesses; controlling the height of the guide roller (43) by a second high-precision hydraulic cylinder (44) to obtain a proper guide angle; bending the elastic resin plate (412) by controlling the first piezoelectric ceramic array (411) and the second piezoelectric ceramic array (413) to extend and shorten one of them to adjust the curvature of the attaching plate (41) to attach it to the surface of the tape roll in real time; meanwhile, the controller compares the pressure value signal transmitted by the miniature pressure sensing piece (416) in real time with a set value, and correspondingly fine-tunes the parameters when the pressure value signal exceeds the threshold value.
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