CN108978328A - A kind of heat-conducting type aramid fiber nanometer insulating paper and preparation method thereof - Google Patents
A kind of heat-conducting type aramid fiber nanometer insulating paper and preparation method thereof Download PDFInfo
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- CN108978328A CN108978328A CN201810838115.6A CN201810838115A CN108978328A CN 108978328 A CN108978328 A CN 108978328A CN 201810838115 A CN201810838115 A CN 201810838115A CN 108978328 A CN108978328 A CN 108978328A
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H13/26—Polyamides; Polyimides
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
- D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/69—Water-insoluble compounds, e.g. fillers, pigments modified, e.g. by association with other compositions prior to incorporation in the pulp or paper
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/48—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances fibrous materials
- H01B3/52—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances fibrous materials wood; paper; press board
Abstract
The invention discloses a kind of heat-conducting type aramid fiber nanometer insulating papers and preparation method thereof,, as matrix, assign aramid fiber nanometer insulating paper excellent mechanical property, insulation performance, heat resistance and flexibility using with high-strength and high-modulus, high length-diameter ratio, temperature tolerance and all good aramid nano-fiber of insulating properties；The main carriers in aramid nano-fiber matrix as heat transfer are dispersed in using hydroxylating nm-class boron nitride as heat filling, optimization interface cohesion reduces interface resistance, assigns its high-termal conductivity, while will not influence the insulation performance of aramid fiber nanometer insulating paper again.The present invention solves the problems, such as to lead to electric insulation equipment cooling and service life since aramid insulating paper thermal conductivity is low at present；Meanwhile avoid using insulating paper caused by thermal conductivity composite lay technique harden embrittlement, complex process the problems such as.
Description
Technical field
The invention belongs to polymer nano materials and field of papermaking, and in particular to a kind of heat-conducting type aramid fiber nanometer insulating paper and
Preparation method.
Background technique
In the electric insulations arts such as motor, transformer, using insulating paper made of aramid fiber due to than natural
Fiber (such as cellulose base insulating paper) product thermal stability, electric property and in terms of have a clear superiority, can
To significantly improve the service life and safety of electric appliance.Aramid insulating paper paper has excellent mechanical performance, insulation performance, well
High temperature resistance and chemical stability.Aramid insulating paper is wide in the form of paper, cardboard, paper membrane composite material, aramid fiber mica paper etc.
The general class of insulation that is applied to is in H grades or more of (180 DEG C of maximum operation (service) temperature) motor and coil windings, the alternate turn-to-turn of transformer
Insulating materials.Aramid insulating paper can solve every challenge of electric insulation field face with its outstanding performance, meet electricity
Gas equipment develops the performance requirement to insulating materials towards small size, light weight, high voltage, high load direction, while can also be
Good mechanically and electrically performance is kept in the bad working environments such as high temperature and humidity.
But although high molecular material has insulation characterisitic, it is the non-conductor of heat mostly, thermal coefficient is universal
Lower than 0.5W/ (mK), far below Heat Conduction Materials such as traditional ceramics, metals.Insulating polymeric material long-time use or
Overload is easy to produce heat accumulation when using, this makes insulating polymeric material be easy to happen thermal expansion, thermal degradation, dielectric properties drop
The safety of the problems such as low, service life and equipment to material bring serious negative effect.Aramid fiber is as macromolecule
Polymer, thermal coefficient are only 0.048W/ (mK), utilize the most widely used in electric insulation field of aramid fiber preparation
Nomex T410 aramid insulating paper (0.05mm specification), thermal coefficient is only 0.103W/ (mK).With power electronics skill
The rapid development of art and semiconductor device, more and more small size alternating-current variable frequency motors are widely applied, each
The electrical equipment to work under kind complex engineering environment is increasing, especially under high-frequency work environment, what electrical equipment generated
Heat can accumulate rapidly, this is just to the mechanical strength of traditional insulator materials, heat resistance, humidity resistance, corona-resistance property, use
The new requirement of the propositions such as service life, it would be highly desirable to design and prepare with high-intensitive, high-termal conductivity paper-based insulation material, can rapidly and
When the heat transfer that accumulates electrical equipment coil to heat dissipation equipment or insulating oil, guarantee that electrical equipment works normally and extends
Its service life.
Currently, the patented technology main thought in relation to heat-conducting type aramid insulating paper includes following two: the first, by thermal conductivity
Filler, such as aluminium nitride, aluminium oxide, boron nitride, magnesia and zinc oxide are directly appended in slurry system, by paper process at
Insulating paper that shape, high temperature hot pressing (in the patent also referred to as roll) obtain having thermal conductivity (number of patent application:
201180064094.3)；The second, conducting filler is mixed with Resin adhesive, obtains the resin with heat-conducting effect
Adhesive carries out gluing to substrate (being Kapton in the patent) using this Resin adhesive with thermal conductivity
(be similar to impregnation), then with the mica paper with insulating properties carry out it is compound obtain thermal conductivity insulating materials (number of patent application:
201510738275.X)。
In presently disclosed Chinese patent, merges and above two prepared the most representative of heat-conducting type insulating paper thinking
Be patent " a kind of high heat conductive insulating aramid fiber prepreg and its manufacturing method " (number of patent application: 201710680629.9).
The patent mixed using meta-aramid chopped strand, meta-aramid pulp fibers with 1~2 μm of hexagonal boron nitride manufacture paper with pulp, high temperature
Hot-pressing processing obtains meta-position aramid fiber paper, and resin, silane coupling agent and heat filling boron nitride is recycled to be configured to thermal conductivity
Compound resin solution, using the thermally conductive resin solution impregnate it is above-mentioned handle to obtain meta-position aramid fiber paper by high temperature hot pressing, most
Obtained heat-conducting type insulation prepreg eventually.But there are the following problems for such method: (1) hexagonal boron nitride is directly appended to virtue
Synthetic fibre be chopped/pulp fibers mixing composition slurry manufacture paper with pulp forming cause very low its heat-conducting effect of influence of the retention of boron nitride；(2)
Aramid short fiber surface is smooth and active group is few, directly adds micron order boron nitride in the slurry, and boron nitride and aramid fiber are fine
Lack between dimension and be effectively combined, only physical deposition, influences its intensity and heating conduction；(3) this traditional using short
It cuts and guarantees its intensity there is still a need for high temperature and pressure hot-pressing processing with the aramid insulating paper of pulp fibers preparation, complex process, equipment are thrown
Money is big；(4) aramid paper is impregnated using the compound resin solution that silane coupling agent, resin form, not only complex process, but also made
The aramid insulating paper of preparation becomes prepreg after impregnating thermally conductive resin adhesive, although the insulation aramid fiber prepreg
With certain thermal conductivity, but it will lead to it and become stiff and brittleness and increase, lose the flexibility of aramid paper, limit it and answer
Use field.Therefore, there has been no see to have that high intensity, high thermal conductivity, flexibility are excellent and preparation process is simple in presently disclosed patent
The relevant technologies of aramid insulating paper single, without hot pressing.
Summary of the invention
It is above-mentioned existing to overcome the purpose of the present invention is to provide a kind of heat-conducting type aramid fiber nanometer insulating paper and preparation method thereof
There is defect existing for technology, the present invention adopts new technology, new method development & production has provided high intensity, high-termal conductivity, flexibility
Good aramid fiber nanometer insulating paper, simple production process and enhances without hot pressing, can be towards miniaturization, lighting and integrated
Change the electric insulation equipment of development as high-end insulating materials, has a extensive future.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
A kind of heat-conducting type aramid fiber nanometer insulating paper, the heat-conducting type aramid fiber nanometer insulating paper is by aramid nano-fiber and nanometer
Boron nitride composition, and the mass ratio of aramid nano-fiber and nm-class boron nitride is (60~90): (10~40)；The nano silicon nitride
Boron is hydroxylating nm-class boron nitride.
Further, the aramid nano-fiber is with p-aramid fiber chopped strand, p-aramid fiber yarn and contraposition virtue
One of synthetic fibre pulp fibers are raw material, are prepared in potassium hydroxide and dimethyl sulfoxide mixed solution system, and aramid fiber
Nanofiber diameter is 15~30nm, and length is 3~10 μm.
Further, the hydroxylating nm-class boron nitride crystal form is hexagonal crystal palpus, flaky structure, and hydroxylating nanometer
Boron nitride partial size is 60~120nm.
Further, the hydroxylating nm-class boron nitride be using nm-class boron nitride as raw material, using mass concentration be 20~
60% sodium hydroxide solution is prepared under ultrasonic wave booster action, and boron nitride is added in every 1mL sodium hydroxide solution
Quality be 2~10mg, ultrasonic power be 300~900W, 30~150min of sonication treatment time.
A kind of preparation method of heat-conducting type aramid fiber nanometer insulating paper, comprising the following steps:
Step 1: aramid nano-fiber dispersion liquid A is prepared；
Step 2: preparation hydroxylating nm-class boron nitride dispersion liquid B；
Step 3: hydroxylating nm-class boron nitride dispersion liquid B is added in aramid nano-fiber dispersion liquid A obtained slurry and is hanged
Supernatant liquid C；
Step 4: pulp suspension C being manufactured paper with pulp using handshcet former, is squeezed, is dried to obtain heat-conducting type aramid fiber nanometer insulating paper,
And the mass ratio of aramid nano-fiber and hydroxylating nm-class boron nitride is (60~90) in heat-conducting type aramid fiber nanometer insulating paper: (10
~40).
Further, in step 1 in p-aramid fiber chopped strand, p-aramid fiber yarn, para-aramid pulp fiber
One kind is raw material, and aramid nano-fiber dispersion liquid A is made in potassium hydroxide and dimethyl sulfoxide mixed solution system.
Further, aramid nano-fiber diameter is 15~30nm in the aramid nano-fiber dispersion liquid A, and length is
3~10 μm；And the mass concentration of aramid nano-fiber is 0.2~1.5% in aramid nano-fiber dispersion liquid A.
Further, sodium hydroxide solution is added in nm-class boron nitride in step 2, is carried out under ultrasonic wave booster action
Modification is washed till after filtrate pH is in neutrality using deionized water after the completion of processing and is redispersed in water, obtains hydroxylating nanometer
Boron nitride dispersion B.
Further, the partial size of the nm-class boron nitride is 60~120nm, the mass concentration of sodium hydroxide solution is 20~
60%, and the quality that boron nitride is added in every 1mL sodium hydroxide solution is 2~10mg, ultrasonic power is 300~900W, ultrasound
30~150min of time is handled, the mass concentration of hydroxylating nm-class boron nitride is in the hydroxylating nm-class boron nitride dispersion liquid B
0.5~2.0%.
Further, the concentration of pulp suspension C is 0.5~2mg/ml in step 3.
Compared with prior art, the invention has the following beneficial technical effects:
The present invention is utilized to be received with nano-scale structures, high intensity, big L/D ratio, temperature tolerance and all good aramid fiber of insulating properties
Rice fiber assigns aramid fiber nanometer insulating paper excellent mechanical property, insulation performance, heat resistance and flexibility etc. as matrix；
It is dispersed in the main carriers in aramid nano-fiber matrix as heat transfer using hydroxylating nm-class boron nitride as heat filling, assigns
Its high-termal conductivity is given, while will not influence the insulation performance of aramid fiber nanometer insulating paper again.The present invention solves current aramid fiber insulation
Paper thermal conductivity is low, influences the problem of thermal diffusivity and service life of electric insulation equipment；It avoids and directly adds micron order in slurry
Boron nitride retention caused by boron nitride is low, the problems such as lacking binding force between boron nitride and fiber；It avoids and utilizes thermal conductivity
Insulating paper caused by composite lay technique harden embrittlement, complex process the problems such as.
The aramid nano-fiber that the present invention uses not only has unique nano-scale structures, big draw ratio and specific surface
Active group long-pending, abundant, while aramid fiber macroscopic fibres excellent mechanical property and heat resistance are remained again, it is brought often for it
The mechanical performance and insulation performance that rule chemical fibre cannot achieve, have with aramid fiber nanometer insulating paper prepared by aramid nano-fiber
Excellent mechanical property and insulation performance, and without necessary high temperature and pressure hot-pressing processing work in traditional aramid paper preparation process
Skill；The hydroxylating nm-class boron nitride of use utilizes its flake nano structure energy and aramid nano-fiber as conducting filler
Generate preferable crosslinking composite effect；Meanwhile hydroxylating nano silicon nitride boron surface hydroxyl abundant can be with aramid nano-fiber
Between generate strong Hydrogenbond, to generate good interface cohesion, reduce boundary defect and interface resistance, ensure that excellent
Different heat-conducting effect.
The present invention adopts new technology, new method development & production provides excellent mechanical strength and insulating properties, high-termal conductivity,
The good aramid fiber nanometer insulating paper of flexibility, simple production process and be not necessarily to conventional thermocompression enhancing technique, it is exhausted to can be used as high-performance
Edge material is widely used in middle and high end electric insulation field, realize electric insulation equipment towards miniaturization, lighting with it is integrated
Development can promote the upgrading of insulation of electrical installation industry product and technological progress, have a extensive future.
Detailed description of the invention
Fig. 1 is the heat-conducting type aramid fiber nanometer insulating paper surface SEM image that the embodiment of the present invention 4 obtains.
Specific embodiment
Embodiments of the present invention are described in further detail below:
A kind of heat-conducting type aramid fiber nanometer insulating paper, aramid nano-fiber and nitrogen in the heat-conducting type aramid fiber nanometer insulating paper
The mass ratio for changing boron is (60~90): (10~40)；The aramid nano-fiber is with p-aramid fiber chopped strand, contraposition virtue
One of synthetic fibre yarn, para-aramid pulp fiber are raw material, are made in potassium hydroxide and dimethyl sulfoxide mixed solution system
It is standby to form；The aramid nano-fiber diameter is 15~30nm, and length is 3~10 μm；The aramid nano-fiber is in water
There is good dispersibility in phase medium；The boron nitride crystal form is hexagonal crystal palpus, flaky structure；The boron nitride
For nm-class boron nitride, partial size is 60~120nm；The nm-class boron nitride is hydroxylating nm-class boron nitride modified；
The hydroxylating nm-class boron nitride is to be existed using boron nitride as raw material using the sodium hydroxide solution that mass concentration is 20~60%
It is prepared under ultrasonic wave booster action；The nm-class boron nitride quality is 2~10mg/ to the volume ratio of sodium hydroxide solution
ml；The ultrasonic processing technique condition are as follows: ultrasonic power: 300~900W, 30~150min of sonication treatment time.
A kind of preparation method of heat-conducting type aramid fiber nanometer insulating paper, comprising the following steps:
Step 1: being original with one of p-aramid fiber chopped strand, p-aramid fiber yarn, para-aramid pulp fiber
Aramid nano-fiber dispersion liquid A is made in material in potassium hydroxide and dimethyl sulfoxide mixed solution system；The aramid fiber nanometer
Aramid nano-fiber diameter is 15~30nm in fiber dispersion A, and length is 3~10 μm；The aramid nano-fiber dispersion
Liquid A can be homogeneously dispersed in water, and aramid nano-fiber mass concentration is 0.2~1.5%；
Step 2: the sodium hydroxide that mass concentration is 20~60% is added in the nm-class boron nitride that partial size is 60~120nm
Solution is modified processing under ultrasonic wave booster action and obtains hydroxylating nm-class boron nitride dispersion liquid B；The nano silicon nitride
Boron quality is 2~10mg/ml to the volume ratio of sodium hydroxide solution；The ultrasonic processing technique condition are as follows: ultrasonic power:
300~900W, 30~150min of sonication treatment time；It is washed till after filtrate pH is in neutrality after the completion of ultrasonic treatment using deionized water
It is redispersed in water, hydroxylating nm-class boron nitride mass concentration is 0.5~2.0%；
Step 3: hydroxylating nm-class boron nitride dispersion liquid B obtained in step 2 is added to virtue obtained in step 1
Pulp suspension C is made in synthetic fibre nanofiber dispersion liquid A, and the concentration of pulp suspension C is 0.5~2mg/mL；
Step 4: pulp suspension C obtained in step 3 is manufactured paper with pulp using handshcet former, squeezes, be dried to obtain heat-conducting type
Aramid fiber nanometer insulating paper, and in heat-conducting type aramid fiber nanometer insulating paper aramid nano-fiber and hydroxylating nm-class boron nitride mass ratio
For (60~90): (10~40).
The present invention using with high-strength and high-modulus, high length-diameter ratio, temperature tolerance and all good aramid nano-fiber of insulating properties as
Matrix assigns aramid fiber nanometer insulating paper excellent mechanical property, insulation performance, heat resistance and flexibility；With hydroxylating nanometer
Boron nitride is dispersed in the main carriers in aramid nano-fiber matrix as heat transfer as heat filling, and optimization interface cohesion subtracts
Few interface resistance, assigns its high-termal conductivity, while will not influence the insulation performance of aramid fiber nanometer insulating paper again.The present invention solves
Aramid insulating paper thermal conductivity is low at present, influences the problem of thermal diffusivity and service life of electric insulation equipment；Meanwhile avoiding benefit
The insulating paper caused by thermal conductivity composite lay technique harden embrittlement, complex process the problems such as.
Below with reference to embodiment, the invention will be described in further detail:
Embodiment 1
A kind of heat-conducting type aramid fiber nanometer insulating paper, aramid nano-fiber and nitrogen in the heat-conducting type aramid fiber nanometer insulating paper
The mass ratio for changing boron is 90:10；The aramid nano-fiber is using p-aramid fiber yarn as raw material, in potassium hydroxide and diformazan
It is prepared in base sulfoxide mixed solution system；The aramid nano-fiber diameter is 15~30nm, and length is 7~10 μm；
The aramid nano-fiber has good dispersibility in an aqueous medium；The boron nitride crystal form is hexagonal crystal palpus, is in
Flaky texture；The boron nitride is nm-class boron nitride, and partial size is 60~120nm；The nm-class boron nitride be by
Modified hydroxylating nm-class boron nitride；The hydroxylating nm-class boron nitride is
20% sodium hydroxide solution is prepared under ultrasonic wave booster action；The nm-class boron nitride quality is molten to sodium hydroxide
The volume ratio of liquid is 2mg/ml；The ultrasonic processing technique condition are as follows: ultrasonic power: 900W, sonication treatment time 30min.
A kind of preparation method of heat-conducting type aramid fiber nanometer insulating paper, comprising the following steps:
Step 1: it using p-aramid fiber yarn as raw material, is made in potassium hydroxide and dimethyl sulfoxide mixed solution system
Aramid nano-fiber dispersion liquid A；Aramid nano-fiber diameter is 15~30nm in the aramid nano-fiber dispersion liquid A, long
Degree is 7~10 μm；The aramid nano-fiber dispersion liquid A can be homogeneously dispersed in water, and aramid nano-fiber quality is dense
Degree is 0.2%；
Step 2: being added the sodium hydroxide solution that mass concentration is 20% for the nm-class boron nitride that partial size is 60~120nm,
It is modified processing under ultrasonic wave booster action and obtains hydroxylating nm-class boron nitride dispersion liquid B；The nm-class boron nitride matter
Measuring to the volume ratio of sodium hydroxide solution is 2mg/ml；The ultrasonic processing technique condition are as follows: ultrasonic power: 900W, ultrasound
Handle time 30min；It is washed till after filtrate pH is in neutrality and is redispersed in water using deionized water after the completion of ultrasonic treatment, hydroxylating
Nm-class boron nitride mass concentration is 0.5%；
Step 3: hydroxylating nm-class boron nitride dispersion liquid B obtained in step 2 is added to virtue obtained in step 1
Pulp suspension C is made in synthetic fibre nanofiber dispersion liquid A, and the concentration of pulp suspension C is 0.5mg/mL；
Step 4: pulp suspension C obtained in step 3 is manufactured paper with pulp using handshcet former, squeezes, be dried to obtain heat-conducting type
Aramid fiber nanometer insulating paper, and in heat-conducting type aramid fiber nanometer insulating paper aramid nano-fiber and hydroxylating nm-class boron nitride mass ratio
For 90:10.
Embodiment 2
A kind of heat-conducting type aramid fiber nanometer insulating paper, aramid nano-fiber and nitrogen in the heat-conducting type aramid fiber nanometer insulating paper
The mass ratio for changing boron is 85:15；The aramid nano-fiber be using p-aramid fiber chopped strand as raw material, in potassium hydroxide and
It is prepared in dimethyl sulfoxide mixed solution system；The aramid nano-fiber diameter is 15~30nm, and length is 5~7 μ
m；The aramid nano-fiber has good dispersibility in an aqueous medium；The boron nitride crystal form is hexagonal crystal palpus,
Flaky structure；The boron nitride is nm-class boron nitride, and partial size is 60~120nm；The nm-class boron nitride be through
Cross modified hydroxylating nm-class boron nitride；The hydroxylating nm-class boron nitride is to utilize mass concentration using boron nitride as raw material
It is prepared under ultrasonic wave booster action for 30% sodium hydroxide solution；The nm-class boron nitride quality is to sodium hydroxide
The volume ratio of solution is 3mg/ml；The ultrasonic processing technique condition are as follows: ultrasonic power: 800W, sonication treatment time
45min。
A kind of preparation method of heat-conducting type aramid fiber nanometer insulating paper, comprising the following steps:
Step 1: using p-aramid fiber chopped strand as raw material, in potassium hydroxide and dimethyl sulfoxide mixed solution system
Aramid nano-fiber dispersion liquid A is made；In the aramid nano-fiber dispersion liquid A aramid nano-fiber diameter be 15~
30nm, length are 5~7 μm；The aramid nano-fiber dispersion liquid A can be homogeneously dispersed in water, aramid nano-fiber
Mass concentration is 0.4%；
Step 2: being added the sodium hydroxide solution that mass concentration is 30% for the nm-class boron nitride that partial size is 60~120nm,
It is modified processing under ultrasonic wave booster action and obtains hydroxylating nm-class boron nitride dispersion liquid B；The nm-class boron nitride matter
Measuring to the volume ratio of sodium hydroxide solution is 3mg/ml；The ultrasonic processing technique condition are as follows: ultrasonic power: 800W, ultrasound
Handle time 45min；It is washed till after filtrate pH is in neutrality and is redispersed in water using deionized water after the completion of ultrasonic treatment, hydroxylating
Nm-class boron nitride mass concentration is 0.8%；
Step 3: hydroxylating nm-class boron nitride dispersion liquid B obtained in step 2 is added to virtue obtained in step 1
Pulp suspension C is made in synthetic fibre nanofiber dispersion liquid A, and the concentration of pulp suspension C is 0.7mg/mL；
Step 4: pulp suspension C obtained in step 3 is manufactured paper with pulp using handshcet former, squeezes, be dried to obtain heat-conducting type
Aramid fiber nanometer insulating paper, and in heat-conducting type aramid fiber nanometer insulating paper aramid nano-fiber and hydroxylating nm-class boron nitride mass ratio
For 85:15.
Embodiment 3
A kind of heat-conducting type aramid fiber nanometer insulating paper, aramid nano-fiber and nitrogen in the heat-conducting type aramid fiber nanometer insulating paper
The mass ratio for changing boron is 80:20；The aramid nano-fiber be using para-aramid pulp fiber as raw material, in potassium hydroxide and
It is prepared in dimethyl sulfoxide mixed solution system；The aramid nano-fiber diameter is 15~30nm, and length is 3~5 μ
m；The aramid nano-fiber has good dispersibility in an aqueous medium；The boron nitride crystal form is hexagonal crystal palpus,
Flaky structure；The boron nitride is nm-class boron nitride, and partial size is 60~120nm；The nm-class boron nitride be through
Cross modified hydroxylating nm-class boron nitride；The hydroxylating nm-class boron nitride is to utilize mass concentration using boron nitride as raw material
It is prepared under ultrasonic wave booster action for 40% sodium hydroxide solution；The nm-class boron nitride quality is to sodium hydroxide
The volume ratio of solution is 4mg/ml；The ultrasonic processing technique condition are as follows: ultrasonic power: 700W, sonication treatment time
60min。
A kind of preparation method of heat-conducting type aramid fiber nanometer insulating paper, comprising the following steps:
Step 1: using para-aramid pulp fiber as raw material, in potassium hydroxide and dimethyl sulfoxide mixed solution system
Aramid nano-fiber dispersion liquid A is made；In the aramid nano-fiber dispersion liquid A aramid nano-fiber diameter be 15~
30nm, length are 3~5 μm；The aramid nano-fiber dispersion liquid A can be homogeneously dispersed in water, aramid nano-fiber
Mass concentration is 0.5%；
Step 2: being added the sodium hydroxide solution that mass concentration is 40% for the nm-class boron nitride that partial size is 60~120nm,
It is modified processing under ultrasonic wave booster action and obtains hydroxylating nm-class boron nitride dispersion liquid B；The nm-class boron nitride matter
Measuring to the volume ratio of sodium hydroxide solution is 4mg/ml；The ultrasonic processing technique condition are as follows: ultrasonic power: 700W, ultrasound
Handle time 60min；It is washed till after filtrate pH is in neutrality and is redispersed in water using deionized water after the completion of ultrasonic treatment, hydroxylating
Nm-class boron nitride mass concentration is 1.0%；
Step 3: hydroxylating nm-class boron nitride dispersion liquid B obtained in step 2 is added to virtue obtained in step 1
Pulp suspension C is made in synthetic fibre nanofiber dispersion liquid A, and the concentration of pulp suspension C is 0.9mg/mL；
Step 4: pulp suspension C obtained in step 3 is manufactured paper with pulp using handshcet former, squeezes, be dried to obtain heat-conducting type
Aramid fiber nanometer insulating paper, and in heat-conducting type aramid fiber nanometer insulating paper aramid nano-fiber and hydroxylating nm-class boron nitride mass ratio
For 80:20.
Embodiment 4
A kind of heat-conducting type aramid fiber nanometer insulating paper, aramid nano-fiber and nitrogen in the heat-conducting type aramid fiber nanometer insulating paper
The mass ratio for changing boron is 75:25；The aramid nano-fiber be using p-aramid fiber chopped strand as raw material, in potassium hydroxide and
It is prepared in dimethyl sulfoxide mixed solution system；The aramid nano-fiber diameter is 15~30nm, and length is 5~7 μ
m；The aramid nano-fiber has good dispersibility in an aqueous medium；The boron nitride crystal form is hexagonal crystal palpus,
Flaky structure；The boron nitride is nm-class boron nitride, and partial size is 60~120nm；The nm-class boron nitride be through
Cross modified hydroxylating nm-class boron nitride；The hydroxylating nm-class boron nitride is to utilize mass concentration using boron nitride as raw material
It is prepared under ultrasonic wave booster action for 50% sodium hydroxide solution；The nm-class boron nitride quality is to sodium hydroxide
The volume ratio of solution is 5mg/ml；The ultrasonic processing technique condition are as follows: ultrasonic power: 600W, sonication treatment time
75min。
A kind of preparation method of heat-conducting type aramid fiber nanometer insulating paper, comprising the following steps:
Step 1: using p-aramid fiber chopped strand as raw material, in potassium hydroxide and dimethyl sulfoxide mixed solution system
Aramid nano-fiber dispersion liquid A is made；In the aramid nano-fiber dispersion liquid A aramid nano-fiber diameter be 15~
30nm, length are 5~7 μm；The aramid nano-fiber dispersion liquid A can be homogeneously dispersed in water, aramid nano-fiber
Mass concentration is 0.7%；
Step 2: being added the sodium hydroxide solution that mass concentration is 50% for the nm-class boron nitride that partial size is 60~120nm,
It is modified processing under ultrasonic wave booster action and obtains hydroxylating nm-class boron nitride dispersion liquid B；The nm-class boron nitride matter
Measuring to the volume ratio of sodium hydroxide solution is 5mg/ml；The ultrasonic processing technique condition are as follows: ultrasonic power: 600W, ultrasound
Handle time 75min；It is washed till after filtrate pH is in neutrality and is redispersed in water using deionized water after the completion of ultrasonic treatment, hydroxylating
Nm-class boron nitride mass concentration is 1.2%；
Step 3: hydroxylating nm-class boron nitride dispersion liquid B obtained in step 2 is added to virtue obtained in step 1
Pulp suspension C is made in synthetic fibre nanofiber dispersion liquid A, and the concentration of pulp suspension C is 1.0mg/mL；
Step 4: pulp suspension C obtained in step 3 is manufactured paper with pulp using handshcet former, squeezes, be dried to obtain heat-conducting type
Aramid fiber nanometer insulating paper, and in heat-conducting type aramid fiber nanometer insulating paper aramid nano-fiber and hydroxylating nm-class boron nitride mass ratio
For 75:25.
Embodiment 5
A kind of heat-conducting type aramid fiber nanometer insulating paper, aramid nano-fiber and nitrogen in the heat-conducting type aramid fiber nanometer insulating paper
The mass ratio for changing boron is 70:30；The aramid nano-fiber is using p-aramid fiber yarn as raw material, in potassium hydroxide and diformazan
It is prepared in base sulfoxide mixed solution system；The aramid nano-fiber diameter is 15~30nm, and length is 7~10 μm；
The aramid nano-fiber has good dispersibility in an aqueous medium；The boron nitride crystal form is hexagonal crystal palpus, is in
Flaky texture；The boron nitride is nm-class boron nitride, and partial size is 60~120nm；The nm-class boron nitride be by
Modified hydroxylating nm-class boron nitride；The hydroxylating nm-class boron nitride is
60% sodium hydroxide solution is prepared under ultrasonic wave booster action；The nm-class boron nitride quality is molten to sodium hydroxide
The volume ratio of liquid is 7mg/ml；The ultrasonic processing technique condition are as follows: ultrasonic power: 500W, sonication treatment time 100min.
A kind of preparation method of heat-conducting type aramid fiber nanometer insulating paper, comprising the following steps:
Step 1: it using p-aramid fiber yarn as raw material, is made in potassium hydroxide and dimethyl sulfoxide mixed solution system
Aramid nano-fiber dispersion liquid A；Aramid nano-fiber diameter is 15~30nm in the aramid nano-fiber dispersion liquid A, long
Degree is 7~10 μm；The aramid nano-fiber dispersion liquid A can be homogeneously dispersed in water, and aramid nano-fiber quality is dense
Degree is 1.0%；
Step 2: being added the sodium hydroxide solution that mass concentration is 60% for the nm-class boron nitride that partial size is 60~120nm,
It is modified processing under ultrasonic wave booster action and obtains hydroxylating nm-class boron nitride dispersion liquid B；The nm-class boron nitride matter
Measuring to the volume ratio of sodium hydroxide solution is 7mg/ml；The ultrasonic processing technique condition are as follows: ultrasonic power: 500W, ultrasound
Handle time 100min；It is washed till after filtrate pH is in neutrality and is redispersed in water using deionized water after the completion of ultrasonic treatment, hydroxyl
Changing nm-class boron nitride mass concentration is 1.4%；
Step 3: hydroxylating nm-class boron nitride dispersion liquid B obtained in step 2 is added to virtue obtained in step 1
Pulp suspension C is made in synthetic fibre nanofiber dispersion liquid A, and the concentration of pulp suspension C is 1.3mg/mL；
Step 4: pulp suspension C obtained in step 3 is manufactured paper with pulp using handshcet former, squeezes, be dried to obtain heat-conducting type
Aramid fiber nanometer insulating paper, and in heat-conducting type aramid fiber nanometer insulating paper aramid nano-fiber and hydroxylating nm-class boron nitride mass ratio
For 70:30.
Embodiment 6
A kind of heat-conducting type aramid fiber nanometer insulating paper, aramid nano-fiber and nitrogen in the heat-conducting type aramid fiber nanometer insulating paper
The mass ratio for changing boron is 65:35；The aramid nano-fiber be using para-aramid pulp fiber as raw material, in potassium hydroxide and
It is prepared in dimethyl sulfoxide mixed solution system；The aramid nano-fiber diameter is 15~30nm, and length is 3~5 μ
m；The aramid nano-fiber has good dispersibility in an aqueous medium；The boron nitride crystal form is hexagonal crystal palpus,
Flaky structure；The boron nitride is nm-class boron nitride, and partial size is 60~120nm；The nm-class boron nitride be through
Cross modified hydroxylating nm-class boron nitride；The hydroxylating nm-class boron nitride is to utilize mass concentration using boron nitride as raw material
It is prepared under ultrasonic wave booster action for 35% sodium hydroxide solution；The nm-class boron nitride quality is to sodium hydroxide
The volume ratio of solution is 8mg/ml；The ultrasonic processing technique condition are as follows: ultrasonic power: 400W, sonication treatment time
120min。
A kind of preparation method of heat-conducting type aramid fiber nanometer insulating paper, comprising the following steps:
Step 1: using para-aramid pulp fiber as raw material, in potassium hydroxide and dimethyl sulfoxide mixed solution system
Aramid nano-fiber dispersion liquid A is made；In the aramid nano-fiber dispersion liquid A aramid nano-fiber diameter be 15~
30nm, length are 3~5 μm；The aramid nano-fiber dispersion liquid A can be homogeneously dispersed in water, aramid nano-fiber
Mass concentration is 1.2%；
Step 2: being added the sodium hydroxide solution that mass concentration is 35% for the nm-class boron nitride that partial size is 60~120nm,
It is modified processing under ultrasonic wave booster action and obtains hydroxylating nm-class boron nitride dispersion liquid B；The nm-class boron nitride matter
Measuring to the volume ratio of sodium hydroxide solution is 8mg/ml；The ultrasonic processing technique condition are as follows: ultrasonic power: 400W, ultrasound
Handle time 120min；It is washed till after filtrate pH is in neutrality and is redispersed in water using deionized water after the completion of ultrasonic treatment, hydroxyl
Changing nm-class boron nitride mass concentration is 1.6%；
Step 3: hydroxylating nm-class boron nitride dispersion liquid B obtained in step 2 is added to virtue obtained in step 1
Pulp suspension C is made in synthetic fibre nanofiber dispersion liquid A, and the concentration of pulp suspension C is 1.6mg/mL；
Step 4: pulp suspension C obtained in step 3 is manufactured paper with pulp using handshcet former, squeezes, be dried to obtain heat-conducting type
Aramid fiber nanometer insulating paper, and in heat-conducting type aramid fiber nanometer insulating paper aramid nano-fiber and hydroxylating nm-class boron nitride mass ratio
For 65:35.
Embodiment 7
A kind of heat-conducting type aramid fiber nanometer insulating paper, aramid nano-fiber and nitrogen in the heat-conducting type aramid fiber nanometer insulating paper
The mass ratio for changing boron is 60:40；The aramid nano-fiber be using p-aramid fiber chopped strand as raw material, in potassium hydroxide and
It is prepared in dimethyl sulfoxide mixed solution system；The aramid nano-fiber diameter is 15~30nm, and length is 5~7 μ
m；The aramid nano-fiber has good dispersibility in an aqueous medium；The boron nitride crystal form is hexagonal crystal palpus,
Flaky structure；The boron nitride is nm-class boron nitride, and partial size is 60~120nm；The nm-class boron nitride be through
Cross modified hydroxylating nm-class boron nitride；The hydroxylating nm-class boron nitride is to utilize mass concentration using boron nitride as raw material
It is prepared under ultrasonic wave booster action for 45% sodium hydroxide solution；The nm-class boron nitride quality is to sodium hydroxide
The volume ratio of solution is 10mg/ml；The ultrasonic processing technique condition are as follows: ultrasonic power: 300W, sonication treatment time
150min。
A kind of preparation method of heat-conducting type aramid fiber nanometer insulating paper, comprising the following steps:
Step 1: using p-aramid fiber chopped strand as raw material, in potassium hydroxide and dimethyl sulfoxide mixed solution system
Aramid nano-fiber dispersion liquid A is made；In the aramid nano-fiber dispersion liquid A aramid nano-fiber diameter be 15~
30nm, length are 5~7 μm；The aramid nano-fiber dispersion liquid A can be homogeneously dispersed in water, aramid nano-fiber
Mass concentration is 1.5%；
Step 2: being added the sodium hydroxide solution that mass concentration is 45% for the nm-class boron nitride that partial size is 60~120nm,
It is modified processing under ultrasonic wave booster action and obtains hydroxylating nm-class boron nitride dispersion liquid B；The nm-class boron nitride matter
Measuring to the volume ratio of sodium hydroxide solution is 10mg/ml；The ultrasonic processing technique condition are as follows: ultrasonic power: 300W, ultrasound
Handle time 150min；It is washed till after filtrate pH is in neutrality and is redispersed in water using deionized water after the completion of ultrasonic treatment, hydroxyl
Changing nm-class boron nitride mass concentration is 2.0%；
Step 3: hydroxylating nm-class boron nitride dispersion liquid B obtained in step 2 is added to virtue obtained in step 1
Pulp suspension C is made in synthetic fibre nanofiber dispersion liquid A, and the concentration of pulp suspension C is 2mg/mL；
Step 4: pulp suspension C obtained in step 3 is manufactured paper with pulp using handshcet former, squeezes, be dried to obtain heat-conducting type
Aramid fiber nanometer insulating paper, and in heat-conducting type aramid fiber nanometer insulating paper aramid nano-fiber and hydroxylating nm-class boron nitride mass ratio
For 60:40.
Detection characterization, part index number difference are carried out to heat-conducting type aramid fiber nanometer insulating paper made from the embodiment of the present invention 4
Are as follows: 1, quantitative: 30.0m2/g；2, tensile strength: 67.0MPa；3, elongation at break 5.6%；4, modulus 2.59GPa；5,
Compressive resistance: 66.8kV/mm；6,TG10%: 537.2 DEG C；7, thermal coefficient is 1.352W/ (mK).It is prepared by the present invention thermally conductive
Type aramid fiber nanometer insulating paper not only has good mechanical performance and thermal stability, has been provided simultaneously with excellent compressive resistance and has led
Hot property.The present invention adopts new technology, new method development & production has provided the good aramid fiber of high intensity, high-termal conductivity, flexibility
Nanometer insulating paper, simple production process and without hot pressing enhance, can towards miniaturization, lighting and integrated development electricity
Gas insulator arrangement has a extensive future as high-end insulating materials.
Claims (10)
1. a kind of heat-conducting type aramid fiber nanometer insulating paper, which is characterized in that the heat-conducting type aramid fiber nanometer insulating paper is by aramid fiber nanometer
Fiber and nm-class boron nitride form, and the mass ratio of aramid nano-fiber and nm-class boron nitride is (60~90): (10~40)；Institute
Stating nm-class boron nitride is hydroxylating nm-class boron nitride.
2. a kind of heat-conducting type aramid fiber nanometer insulating paper according to claim 1, which is characterized in that the aramid fiber Nanowire
Dimension is with one of p-aramid fiber chopped strand, p-aramid fiber yarn and para-aramid pulp fiber for raw material, in hydroxide
It is prepared in potassium and dimethyl sulfoxide mixed solution system, and aramid nano-fiber diameter is 15~30nm, length is 3~10
μm。
3. a kind of heat-conducting type aramid fiber nanometer insulating paper according to claim 1, which is characterized in that the hydroxylating nanometer nitrogen
Changing boron crystal form as hexagonal crystal palpus, flaky structure, and hydroxylating nm-class boron nitride partial size is 60~120nm.
4. a kind of heat-conducting type aramid fiber nanometer insulating paper according to claim 1, which is characterized in that the hydroxylating nanometer nitrogen
Changing boron is using nm-class boron nitride as raw material, and the sodium hydroxide solution for being 20~60% using mass concentration is in ultrasonic wave booster action
Under be prepared, and in every 1mL sodium hydroxide solution be added boron nitride quality be 2~10mg, ultrasonic power be 300~
900W, 30~150min of sonication treatment time.
5. a kind of preparation method of heat-conducting type aramid fiber nanometer insulating paper, which comprises the following steps:
Step 1: aramid nano-fiber dispersion liquid A is prepared；
Step 2: preparation hydroxylating nm-class boron nitride dispersion liquid B；
Step 3: hydroxylating nm-class boron nitride dispersion liquid B is added in aramid nano-fiber dispersion liquid A, pulp suspension is made
C；
Step 4: pulp suspension C is manufactured paper with pulp using handshcet former, is squeezed, is dried to obtain heat-conducting type aramid fiber nanometer insulating paper, and is led
The mass ratio of aramid nano-fiber and hydroxylating nm-class boron nitride is (60~90) in heat type aramid fiber nanometer insulating paper: (10~
40)。
6. a kind of preparation method of heat-conducting type aramid fiber nanometer insulating paper according to claim 5, which is characterized in that step 1
In with one of p-aramid fiber chopped strand, p-aramid fiber yarn, para-aramid pulp fiber for raw material, in potassium hydroxide and
Aramid nano-fiber dispersion liquid A is made in dimethyl sulfoxide mixed solution system.
7. a kind of preparation method of heat-conducting type aramid fiber nanometer insulating paper according to claim 6, which is characterized in that described
Aramid nano-fiber diameter is 15~30nm in aramid nano-fiber dispersion liquid A, and length is 3~10 μm；And aramid nano-fiber
The mass concentration of aramid nano-fiber is 0.2~1.5% in dispersion liquid A.
8. a kind of preparation method of heat-conducting type aramid fiber nanometer insulating paper according to claim 5, which is characterized in that step 2
It is middle that sodium hydroxide solution is added in nm-class boron nitride, it is modified processing under ultrasonic wave booster action, is utilized after the completion of processing
Deionized water is washed till after filtrate pH is in neutrality and is redispersed in water, obtains hydroxylating nm-class boron nitride dispersion liquid B.
9. a kind of preparation method of heat-conducting type aramid fiber nanometer insulating paper according to claim 8, which is characterized in that described to receive
The partial size of rice boron nitride is 60~120nm, and the mass concentration of sodium hydroxide solution is 20~60%, and every 1mL sodium hydroxide is molten
The quality that boron nitride is added in liquid is 2~10mg, and ultrasonic power is 300~900W, sonication treatment time 30~150min, described
The mass concentration of hydroxylating nm-class boron nitride is 0.5~2.0% in hydroxylating nm-class boron nitride dispersion liquid B.
10. a kind of preparation method of heat-conducting type aramid fiber nanometer insulating paper according to claim 5, which is characterized in that step
The concentration of pulp suspension C is 0.5~2mg/ml in three.
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