CN105349114A - Boron nitride doped composite material and preparation method and application thereof - Google Patents
Boron nitride doped composite material and preparation method and application thereof Download PDFInfo
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Abstract
The invention discloses a boron nitride doped composite material and a preparation method and application thereof. The boron nitride doped composite material of the invention includes graphene oxide and boron nitride, which are doped with each other; and the mass ratio of graphene oxide to boron nitride is (0.01-0.1):(0.9-0.99). The preparation method comprises preparation of a mixed dispersion liquid containing graphene oxide and boron nitride, and drying of the mixed dispersion liquid. Graphene oxide and boron nitride are doped with each other, so that the boron nitride doped composite material has excellent thermal conductivity, and stable performance. The preparation method of the boron nitride doped composite material has mild reaction conditions, so that the prepared boron nitride doped composite material not only has excellent heat-conducting property, but also gains guaranteed stable performance. In addition, the method has low equipment requirement and simple operation, so as to effectively reduce the production cost.
Description
Technical field
The invention belongs to electronic package material technical field, particularly one doping boron nitride composite and its preparation method and application.
Background technology
Along with microelectronic device is day by day towards light, thin, little future development, the heat that electronic devices and components produce is accumulated rapidly, as dispelled the heat not in time, can all produce impact in various degree, the therefore heat-sinking capability ever more important of baseplate material to the reliability of its performance and work-ing life.And all the time, polymer matrix composites are insulating heat-conduction materials the most frequently used in microelectronics industry.
But the usual heat conductivility of resin matrix substrate material is poor, come from the thermal conductivity that phonon spectra does not mate and resin matrix itself is lower between resin matrix with heat conductive filler.In recent years, the various method of modifying of human use is introduced covalent linkage and is connected between resin matrix and filler particles, but these methods are very limited for the lifting of material conducts heat performance.Such as, in order to improve the heat conductivility of polymer matrix composites, existingly generally in resin matrix, add heat conductive filler.And traditional heat conductive filler such as aluminum oxide can not meet the demand improving substrate heat conductivility gradually.
In addition, resin composite materials preparation process is comparatively loaded down with trivial details, and relate to the dispersion of filler and the curing process etc. of resin, easily cause resin composite materials unstable properties, production cost is high.
In sum, there is a developmental bottleneck in the resin composite materials that traditional heat conductive filler is filled, prior art there is no preferably solution and provides, therefore await developing a kind of newly, simple technology prepares high-heat-conductive composite material.
Summary of the invention
The object of the invention is to the above-mentioned deficiency overcoming prior art, a kind of doping boron nitride composite and preparation method thereof and its application method are provided, to solve in prior art baseplate material as polymer matrix composites poor thermal conductivity, the technical problem of complicated process of preparation.
In order to realize foregoing invention object, technical scheme of the present invention is as follows:
A kind of doping boron nitride composite, comprise graphene oxide and the boron nitride of doping mutually, and the mass ratio of described graphene oxide and boron nitride is (0.01-0.1): (0.9-0.99).
And a kind of preparation method of the boron nitride composite that adulterates, comprises the steps:
Graphene oxide dispersion and boron nitride dispersion are carried out combination treatment, forms mixed dispersion liquid; Wherein, the dispersion liquid of described graphene oxide and the dispersion liquid of boron nitride are (0.01-0.1) according to the mass ratio of graphene oxide and boron nitride: (0.9-0.99) carries out combination treatment;
Described mixed dispersion liquid is carried out drying treatment.
And the present invention adulterates the application of boron nitride composite in Electronic Packaging, motor, automobile, special cable, space flight and aviation.
The invention described above doping boron nitride composite is adulterated mutually by graphene oxide and boron nitride, makes doping boron nitride composite have excellent thermal conductivity, and its stable performance.
The preparation method of the invention described above doping boron nitride composite is relative to the preparation of traditional resin composite materials, reaction conditions is gentle, make the doping boron nitride composite prepared not only have excellent heat conductivility, and the doping boron nitride composite stable performance of preparing can be ensured.In addition, the method is low for equipment requirements, simple to operate, thus effectively reduces its production cost.
Just because of the invention described above doping boron nitride composite, there is excellent heat conductivility, and stable performance, production cost is low, and it can be widely used in Electronic Packaging, motor, automobile, special cable, space flight and aviation, and ensure the perfect heat-dissipating of corresponding product, stable performance.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the schema of the preparation method of embodiment of the present invention doping boron nitride composite;
Fig. 2 is scanning electron microscope (SEM) figure of doping boron nitride composite prepared by embodiment 1.
Embodiment
In order to make the technical problem to be solved in the present invention, technical scheme and beneficial effect clearly understand, below in conjunction with embodiment and accompanying drawing, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Boron nitride is an emerging kind grapheme two-dimension material, is also referred to as " white graphite alkene ".Research shows, boron nitride has excellent physicals, and as broad-band gap, high heat conduction, low-k and high mechanical strength etc., in face, theoretical thermal conductivity reaches 2000W/mk, and boron nitride also has very strong resistance of oxidation in addition.Based on the discovery of this performance of boron nitride, embodiments provide a kind of doping boron nitride composite with its stable performance of excellent heat conducting performance.Embodiment of the present invention doping boron nitride composite comprises graphene oxide and the boron nitride of doping mutually, and the mass ratio of described graphene oxide and boron nitride is (0.01-0.1): (0.9-0.99), be preferably (0.03-0.07): (0.93-0.97).
Like this, in embodiment doping boron nitride composite, take boron nitride as matrix composition, and the graphene oxide of this proportional range that adulterates, graphene oxide is played between adjacent boron nitride, constructs heat-conductive bridges beam action, the reduction of boron nitride/boron nitride interface resistance makes the capacity of heat transmission of boron nitride network greatly improve, in addition surface of graphene oxide with negative electricity group further increase the dispersiveness of boron nitride in system and orientation arrangement, decrease the interface phonon scattering in system, thus the synergism realized between graphene oxide and boron nitride, this doping boron nitride composite is made to have higher thermal conductivity, thus give the heat conductivility of this doping boron nitride composite excellence, and its correlated performance is stablized.
In one embodiment, this boron nitride selects hexagonal boron nitride.
In another embodiment, this graphene oxide is of a size of 1-2 μm.Research finds, controlled by graphene oxide at 1-2 μm of its heat conductivility relatively best, its oversize or too small heat conductivility that all can make declines.
In a further embodiment, in above-mentioned doping boron nitride composite also doped with tensio-active agent.Preferably, the amount of this tensio-active agent doping is the mass ratio of tensio-active agent and boron nitride is (0.1-0.15): (0.85-0.90).
In certain embodiments, at least one in Sodium dodecylbenzene sulfonate, Sodium cholic acid, sodium laurylsulfonate, fatty alcohol-ether sodium sulfate, ethoxylated fatty-acid methyl ester sodium sulfonate, Seconary Alkane Sulphonate Sodium selected by this tensio-active agent.
By doping surfaces active agent component in above-mentioned doping boron nitride composite, the tensio-active agent of at least one particularly in Sodium dodecylbenzene sulfonate, Sodium cholic acid, sodium laurylsulfonate, fatty alcohol-ether sodium sulfate, ethoxylated fatty-acid methyl ester sodium sulfonate, Seconary Alkane Sulphonate Sodium, for improving the dispersiveness of boron nitride in system, realizing the Uniform Doped of graphene oxide and boron nitride.
On the basis of above-mentioned each doping boron nitride composite embodiment, this doping boron nitride composite can exist with the form of being wished by user.In one embodiment, the doping boron nitride composite in the various embodiments described above exists with membrane structure or grain pattern form, or exist with the form of membrane structure and grain pattern mixture.
When the doping boron nitride composite in the various embodiments described above be exist with the form of membrane structure time, find after deliberation, relatively high in the thermal conductivity of the in-plane of this doping boron nitride composite film.In one embodiment, film thickness when this doping boron nitride composite is membrane structure controls as 80-120 μm.The doping boron nitride composite film of thickness had relatively high heat conductivility.In a further embodiment, this doping boron nitride composite membrane plane direction thermal conductivity is 6.7 ~ 26.5W/mk.
In another embodiment, when the doping boron nitride composite in the various embodiments described above be exist with grain pattern form time, the particle diameter controlling this grain pattern is 2-10 μm.
From the above, the doping boron nitride composite above described in each embodiment has high thermal conductivity, its excellent thermal conductivity, and its stable performance.In addition, the doping heat conductivility of boron nitride composite and stability can be improved further by adding other components such as components such as tensio-active agent.
Correspondingly, the embodiment of the present invention additionally provides a kind of preparation method of doping boron nitride composite mentioned above.As shown in Figure 1, it comprises the steps: in this nano-silicone wire/carbon composite negative pole material preparation method technical process
Step S01. preparation contains the mixed dispersion liquid of graphene oxide and boron nitride:
Graphene oxide dispersion and boron nitride dispersion are carried out combination treatment, forms mixed dispersion liquid;
Step S02. carries out drying treatment to mixed dispersion liquid:
Described mixed dispersion liquid is carried out drying treatment.
Particularly, in order to ensure that the doping boron nitride composite prepared has satisfactory thermal conductivity and high heat conductivility, in an embodiment, in above-mentioned steps S01 in the process of the mixed dispersion liquid of preparation, the dispersion liquid of described graphene oxide and the dispersion liquid of boron nitride are (0.01-0.1) according to the mass ratio of graphene oxide and boron nitride: (0.9-0.99) carries out combination treatment.
The method of this combination treatment can be mechanical stirring, supersound process or other hybrid modes, its objective is and the dispersion liquid of graphene oxide is mixed with the dispersion liquid of boron nitride, form homodisperse dispersion liquid.In one embodiment, this mixed processing method adopts the ultrasonic method combining method with mechanical stirring to carry out.As in specific embodiment, mixed processing method is ultrasonic 20min under the power of 500W, applies the mechanical stirring of 200r/min while ultrasonic.This combination treatment effectively can improve the efficiency of combination treatment, and make graphene oxide and boron nitride dispersed.
In one embodiment, the preparation of the graphene oxide dispersion in this step S01 can adopt ultrasonic method to be scattered in solvent by graphene oxide, wherein, at least one in water, benzyl benzoate, N methylformamide, Virahol, dimethyl sulfoxide (DMSO) selected by solvent.In a particular embodiment, this graphene oxide can be worked as not only according to graphene oxide preparation method preparation in step S11 in following embodiment 1.
In another embodiment, the compound method of the boron nitride dispersion in this step S01 can be prepared according to following either method:
The first: boron nitride powder is added in dispersion solvent, after adopting supersound process, carries out successively leaving standstill and solid-liquid separation process, stay supernatant liquid, obtain the dispersion liquid of boron nitride;
The second: be added to by boron nitride powder in dispersion solvent, after adopting mechanical stirring process, carries out successively leaving standstill and solid-liquid separation process, stays supernatant liquid, obtain the dispersion liquid of boron nitride;
The third: boron nitride powder is added in dispersion solvent, with after mechanical stirring process while adopting supersound process, carries out successively leaving standstill and solid-liquid separation process, stay supernatant liquid, obtain the dispersion liquid of boron nitride;
4th kind: boron nitride powder and tensio-active agent are added in water and carry out ball-milling processing successively, after supersound process, then carry out solid-liquid separation, stay supernatant liquid, obtain the dispersion liquid of boron nitride; Wherein, the mass ratio of described tensio-active agent and boron nitride is (0.1-0.15): (0.85-0.90).
In a particular embodiment, above-mentioned the first select at least one in DMF, benzyl benzoate, N methylformamide, Virahol, dimethyl sulfoxide (DMSO) to the dispersion solvent in the third.
In another specific embodiment, at least one in DMF, benzyl benzoate, N methylformamide, Virahol, dimethyl sulfoxide (DMSO) selected by the tensio-active agent in above-mentioned 4th kind.Add surfactivity and to select the Action of Surfactant of the type as identical in Action of Surfactant contained by boron nitride composite of above adulterating.
In other specific embodiment, the first particle diameter to the boron nitride in the 4th kind above-mentioned is 2 μm-10 μm.The boron nitride of this particle size range effectively can be mixed with dispersion liquid, and can better with graphene oxide generation heat conduction synergism.
In above-mentioned steps S02, drying treatment is carried out to mixed dispersion liquid and can adopt conventional drying mode, as normal pressure heat drying, dry after natural filtration, or the mode such as dry after vacuum filtration, as long as effectively desolventizing can be removed.In a preferred embodiment, carrying out drying treatment to mixed dispersion liquid can carry out as follows: carry out vacuum filtration after described mixed dispersion liquid being coated on filter membrane surface, then after filter membrane drying treatment, removing filter membrane.By which drying treatment, the final doping boron nitride composite obtained can be made to be exist with membrane structure form, and the thickness of rete also can control flexibly.
Therefore, the preparation method of the various embodiments described above doping boron nitride composite is relative to the preparation of traditional resin composite materials, reaction conditions is gentle, make the doping boron nitride composite prepared not only have excellent heat conductivility, and the doping boron nitride composite stable performance of preparing can be ensured.In addition, the method is low for equipment requirements, simple to operate, thus effectively reduces its production cost.
Just because of the doping boron nitride composite in each embodiment above, there is excellent heat conductivility, and its preparation method reaction conditions is gentle, low for equipment requirements, simple to operate, make this doping boron nitride composite stable performance, production cost is low, therefore, it can be widely used in Electronic Packaging, motor, automobile, special cable, space flight and aviation, thus ensures the heat dispersion of the excellence of corresponding product, makes its stable performance.
Now for the boron nitride composite and preparation method thereof that adulterates, the present invention is further elaborated.Thermal conductivity in following each embodiment: the LFA467 laser heat conducting instrument measurement plane thermal diffusivity adopting German Nai Chi company to produce, utilize the density of mass body area method calculation sample, utilize the Q2O differential scanning calorimeter of TA company of the U.S. and the specific heat capacity of sapphire method characterizing sample.Thermal conductivity is the product of sample plane thermal diffusivity, density and specific heat capacity.
Embodiment 1
A kind of doping boron nitride composite and preparation method thereof.Doping boron nitride composite preparation method comprises following concrete steps:
S11. the preparation of graphene oxide dispersion:
Take graphene oxide powder 1.0g, add 500ml deionized water, supersound process 120min, power is 500W, and obtaining mass concentration is the graphene oxide dispersion of 2mg/ml.
Wherein, the concrete grammar preparing graphene oxide is:
A., under condition of ice bath, 1g Graphite Powder 99,1g SODIUMNITRATE and the 46ml vitriol oil stir 15min under 1000r/min condition, then slowly add 6g potassium permanganate, adding speed is 1g/10min, continue under 600r/min condition to stir 60min, keep system temperature lower than 20 DEG C, obtain mixed solution;
B. described mixed solution is warming up to 35 DEG C, continues to stir 1.5h; In described mixed solution, add 80ml deionized water, be warming up to 90 DEG C, stir 30min; Finally add 40ml30wt% hydrogen peroxide, reaction 20min, mixed solution color becomes golden yellow from brown;
C. by the mixing solutions reacted completely successively with hydrogen peroxide, mass concentration that mass concentration is 30% be 10% hydrochloric acid and distilled water carry out eccentric cleaning and dry, obtain graphene oxide, the speed of eccentric cleaning is 8000r/min, and the time is 15min.
S12. the preparation of graphene oxide dispersion:
Be that the boron nitride powder of 2 μm, 0.2g Sodium dodecylbenzene sulfonate and 200ml deionized water are mixed to join in 500ml ball grinder, with the rotating speed ball milling 48h of 300r/min by 2g particle diameter; Get mixed solution with the power ultrasonic 6h of 500W, with the centrifugal 15min of the rotating speed of 2000r/min, get supernatant liquid; Get 50ml boron nitride sheet dispersion liquid, be that 0.4 μm of organic filter membrane carries out suction filtration with aperture, calculate solids content after drying, obtain the concentration of boron nitride sheet dispersion liquid;
S13. the preparation of doping boron nitride composite film (graphene oxide doped boron nitride Composite Paper, lower same):
With graphene oxide: boron nitride mass ratio is that the ratio of 1:99 is got the dispersion liquid that graphene oxide obtains and mixed with boron nitride dispersion, ultrasonic 20min under the power of 500W, apply the mechanical stirring of 200r/min while ultrasonic, make mixed solution present homogeneous Dark grey; The Homogeneous phase mixing liquid of gained is carried out vacuum filtration, filter bowl, filter core (Band clamp) entirety is vertically put into air dry oven, dry 24h under 50 DEG C of conditions, obtain graphene oxide doped boron nitride Composite Paper.
After tested, can prepare 80 μm of thick graphene oxide doped boron nitride Composite Papers by the present embodiment 1 method, in-plane thermal conductivity is 7.1W/mk.
Embodiment 2
Preparation method is identical with embodiment 1, and difference is only: graphene oxide in step S13: the ratio of boron nitride mass ratio becomes 10:90 from 1:99.
After tested, can prepare 80 μm of thick graphene oxide doped boron nitride Composite Papers by the present embodiment 2 method, in-plane thermal conductivity is 10W/mk.
Embodiment 3
Preparation method is identical with embodiment 1, and difference is only: the tensio-active agent used in step S12 is Sodium cholic acid.
After tested, can prepare 80 μm of thick graphene oxide doped boron nitride Composite Papers by the present embodiment 3 method, in-plane thermal conductivity is 6.7W/mk.
Embodiment 4
A kind of doping boron nitride composite and preparation method thereof.Doping boron nitride composite preparation method comprises following concrete steps:
S41. the preparation of graphene oxide dispersion:
Identical with S11 concrete steps in embodiment 1.
S42. the preparation of graphene oxide dispersion:
Be that the boron nitride powder of 10 μm, 0.2g Sodium dodecylbenzene sulfonate and 200ml deionized water are mixed to join in 500ml ball grinder, with the rotating speed ball milling 48h of 300r/min by 2g particle diameter; Get mixed solution with the power ultrasonic 6h of 500W, footpath is that 0.4 μm of organic filter membrane carries out suction filtration, calculates solids content, obtain the concentration of boron nitride sheet dispersion liquid after drying.
S43. the preparation of graphene oxide doped boron nitride composite membrane (graphene oxide doped boron nitride Composite Paper):
With graphene oxide: boron nitride mass ratio is that the ratio of 5:95 is got the dispersion liquid that graphene oxide obtains and mixed with boron nitride dispersion, ultrasonic 20min under the power of 500W, apply the mechanical stirring of 200r/min while ultrasonic, make mixed solution present homogeneous Dark grey; The Homogeneous phase mixing liquid of gained is carried out vacuum filtration, filter bowl, filter core (Band clamp) entirety is vertically put into air dry oven, dry 24h under 50 DEG C of conditions, obtain graphene oxide doped boron nitride Composite Paper.
After tested, can prepare 120 μm of thick graphene oxide doped boron nitride Composite Papers by the present embodiment 4 method, in-plane thermal conductivity is 21W/mk.
Embodiment 5
Preparation method is identical with embodiment 4, and difference is only: graphene oxide in step S43: the ratio of boron nitride mass ratio becomes 3:97 from 5:95.
After tested, can prepare 110 μm of thick graphene oxide doped boron nitride Composite Papers by the present embodiment 5 method, in-plane thermal conductivity is 16W/mk.
Embodiment 6
Preparation method is identical with embodiment 4, and difference is only: the ultrasonic time used in step S42 becomes 12h from 6h.
After tested, can prepare 105 μm of thick graphene oxide doped boron nitride Composite Papers by the present embodiment 6 method, in-plane thermal conductivity is 17W/mk.
Embodiment 7
A kind of doping boron nitride composite and preparation method thereof.Doping boron nitride composite preparation method comprises following concrete steps:
S71. the preparation of graphene oxide dispersion:
Identical with S11 concrete steps in embodiment 1.
S72. the preparation of graphene oxide dispersion:
Be that the boron nitride powder of 10 μm joins 500mlN by 2g particle diameter, in dinethylformamide, with the power ultrasonic 48h of 500W, apply the mechanical stirring of 200r/min simultaneously; Mixed solution leaves standstill 24h, gets supernatant liquid, obtains boron nitride sheet dispersion liquid; Get 50ml boron nitride sheet dispersion liquid, be that 0.4 μm of organic filter membrane carries out suction filtration with aperture, calculate solids content after drying, obtain the concentration of boron nitride sheet dispersion liquid.
S73. the preparation of graphene oxide doped boron nitride composite membrane (graphene oxide doped boron nitride Composite Paper):
With graphene oxide: boron nitride mass ratio is that the ratio of 5:95 is got the dispersion liquid that graphene oxide obtains and mixed with boron nitride dispersion, ultrasonic 20min under the power of 500W, the mechanical stirring of 200r/min is applied while ultrasonic, mixed solution is made to present homogeneous Dark grey, the Homogeneous phase mixing liquid of gained is carried out vacuum filtration, filter bowl, filter core (Band clamp) entirety are vertically put into air dry oven, dry 24h under 50 DEG C of conditions, obtain graphene oxide doped boron nitride Composite Paper.
After tested, can prepare 100 μm of thick graphene oxide doped boron nitride Composite Papers by the present embodiment 7 method, in-plane thermal conductivity is 26.5W/mk.
Embodiment 8
A kind of doping boron nitride composite and preparation method thereof.Doping boron nitride composite preparation method comprises following concrete steps:
S81. the preparation of graphene oxide dispersion:
Identical with S11 concrete steps in embodiment 1.
S82. the preparation of graphene oxide dispersion:
Be that the boron nitride powder of 10 μm joins 500mlN, in dinethylformamide, with the power ultrasonic 48h of 500W by 2g particle diameter; Mixed solution leaves standstill 24h, gets supernatant liquid, obtains boron nitride sheet dispersion liquid; Get 50ml boron nitride sheet dispersion liquid, be that 0.4 μm of organic filter membrane carries out suction filtration with aperture, calculate solids content after drying, obtain the concentration of boron nitride sheet dispersion liquid;
S83. the preparation of graphene oxide doped boron nitride composite membrane (graphene oxide doped boron nitride Composite Paper):
With graphene oxide: boron nitride mass ratio is that the ratio of 5:95 is got the dispersion liquid that graphene oxide obtains and mixed with boron nitride dispersion, ultrasonic 20min under the power of 500W, apply the mechanical stirring of 200r/min while ultrasonic, make mixed solution present homogeneous Dark grey; The Homogeneous phase mixing liquid of gained is carried out vacuum filtration, filter bowl, filter core (Band clamp) entirety is vertically put into air dry oven, dry 24h under 50 DEG C of conditions, obtain graphene oxide doped boron nitride Composite Paper.
After tested, can prepare 95 μm of thick graphene oxide doped boron nitride Composite Papers by the present embodiment 8 method, in-plane thermal conductivity is 22.5W/mk.
Embodiment 9
Preparation method is identical with embodiment 8, and difference is only: the boron nitride particle diameter used in step S82 becomes 2 μm from 10 μm.
After tested, can prepare 100 μm of thick graphene oxide doped boron nitride Composite Papers by the present embodiment 9 method, in-plane thermal conductivity is 11.1W/mk.
Application Example
A kind of method contrasting industrial FR4 epoxy resin base plate and the heat conductivility of the doping boron nitride material prepared by embodiment 4.Contrast industrial FR4 epoxy resin base plate and comprise following concrete steps with the method for the heat conductivility of the doping boron nitride material prepared by embodiment 4:
S1. with the lead frame end that conductive silver glue point is drawn in LED, on doping boron nitride material LED being carried on industrial FR4 epoxy resin base plate and prepared by embodiment 4, and make the doping boron nitride material that LED is close to industrial FR4 epoxy resin base plate and is prepared by embodiment 4.
S2. the lead frame of the lead-in wire of external application power supply with LED two ends is connected, regulates suitable voltage, make LED work 5 minutes.
S3. the temperature at LED place on the doping boron nitride material characterizing industrial FR4 epoxy resin base plate with infrared thermography and prepared by embodiment 4.
After tested, industrial FR4 epoxy resin base plate LED place temperature is 70-90 DEG C, and the doping boron nitride material LED place temperature prepared by embodiment 4 is 40-60 DEG C.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. adulterate a boron nitride composite, comprise graphene oxide and the boron nitride of doping mutually, and the mass ratio of described graphene oxide and boron nitride is (0.01-0.1): (0.9-0.99).
2. doping boron nitride composite according to claim 1, it is characterized in that: described doping boron nitride composite is also containing tensio-active agent, and the mass ratio of described tensio-active agent and boron nitride is (0.1-0.15): (0.85-0.90).
3. doping boron nitride composite according to claim 2, is characterized in that: at least one in Sodium dodecylbenzene sulfonate, Sodium cholic acid, sodium laurylsulfonate, fatty alcohol-ether sodium sulfate, ethoxylated fatty-acid methyl ester sodium sulfonate, Seconary Alkane Sulphonate Sodium selected by described tensio-active agent.
4., according to the arbitrary described doping boron nitride composite of claim 1-3, it is characterized in that: described doping boron nitride composite is that membrane structure is or/and grain pattern.
5. doping boron nitride composite according to claim 4, is characterized in that: when described doping boron nitride composite is membrane structure, and its film thickness is 80-120 μm;
The particle diameter of described grain pattern is 2-10 μm.
6. adulterate the preparation method of boron nitride composite, comprises the steps:
Graphene oxide dispersion and boron nitride dispersion are carried out combination treatment, forms mixed dispersion liquid; Wherein, the dispersion liquid of described graphene oxide and the dispersion liquid of boron nitride are (0.01-0.1) according to the mass ratio of graphene oxide and boron nitride: (0.9-0.99) carries out combination treatment;
Described mixed dispersion liquid is carried out drying treatment.
7. the preparation method of doping boron nitride composite according to claim 6, is characterized in that: described boron nitride dispersion prepares as follows:
Boron nitride powder is added in dispersion solvent, adopts ultrasonic or/and after mechanical stirring process, carry out successively leaving standstill and solid-liquid separation process, stay supernatant liquid, obtain the dispersion liquid of boron nitride; Or
Boron nitride powder and tensio-active agent are added in water and carry out ball-milling processing successively, after supersound process, then carry out solid-liquid separation, stay supernatant liquid, obtain the dispersion liquid of boron nitride; Wherein, the mass ratio of described tensio-active agent and boron nitride is (0.1-0.15): (0.85-0.90).
8. the preparation method of doping boron nitride composite according to claim 7, is characterized in that: described dispersion solvent selects at least one in DMF, benzyl benzoate, N methylformamide, Virahol, dimethyl sulfoxide (DMSO); And/or
At least one in Sodium dodecylbenzene sulfonate, Sodium cholic acid, sodium laurylsulfonate, fatty alcohol-ether sodium sulfate, ethoxylated fatty-acid methyl ester sodium sulfonate, Seconary Alkane Sulphonate Sodium selected by described tensio-active agent.
9. according to the preparation method of the arbitrary described doping boron nitride composite of claim 6-8, it is characterized in that: to the withering method of described mixed dispersion liquid be: after described mixed dispersion liquid being coated on filter membrane surface, carry out vacuum filtration, again after filter membrane drying treatment, removing filter membrane.
10. the doping boron nitride composite as described in as arbitrary in claim 1-5 or arbitrary according to claim 6-9 as described in the application of doping boron nitride composite in Electronic Packaging, motor, automobile, special cable, space flight and aviation prepared of the preparation method of doping boron nitride composite.
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