CN108978328B - Heat-conducting aramid nano insulating paper and preparation method thereof - Google Patents
Heat-conducting aramid nano insulating paper and preparation method thereof Download PDFInfo
- Publication number
- CN108978328B CN108978328B CN201810838115.6A CN201810838115A CN108978328B CN 108978328 B CN108978328 B CN 108978328B CN 201810838115 A CN201810838115 A CN 201810838115A CN 108978328 B CN108978328 B CN 108978328B
- Authority
- CN
- China
- Prior art keywords
- nano
- aramid
- boron nitride
- fiber
- aramid nano
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
-
- 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
-
- 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 heat-conducting aramid nano insulating paper and a preparation method thereof, wherein aramid nano fibers with high strength and high modulus, high length-diameter ratio, good temperature resistance and good insulativity are used as a matrix, so that the aramid nano insulating paper is endowed with excellent mechanical property, insulating property, temperature resistance and flexibility; the hydroxylated nano boron nitride is used as a heat conduction filler and dispersed in the aramid nano fiber matrix as a main carrier of heat conduction, so that interface combination is optimized, interface thermal resistance is reduced, high heat conductivity is given to the aramid nano fiber matrix, and the insulating property of the aramid nano insulating paper is not influenced. The invention solves the problems of low heat dissipation and long service life of the electrical insulation equipment caused by low thermal conductivity of the aramid fiber insulation paper at present; meanwhile, the problems of hard and brittle insulating paper, complex process and the like caused by the thermal conductivity composite resin impregnation process are avoided.
Description
Technical Field
The invention belongs to the field of polymer nano materials and papermaking, and particularly relates to heat-conducting aramid nano insulating paper and a preparation method thereof.
Background
In the field of electrical insulation products such as motors, transformers and the like, the insulation paper made of aramid fibers has obvious advantages in the aspects of thermal stability, electrical properties, mechanical properties and the like compared with natural fiber (such as cellulose-based insulation paper) products, and therefore the service life and safety of electrical appliances can be obviously improved. The aramid fiber insulating paper has excellent mechanical property, insulating property, high temperature resistance and chemical stability. The aramid fiber insulation paper is widely applied to coil windings and inter-phase turn insulation materials of motors and transformers with insulation grades above H (the maximum service temperature is 180 ℃) in the forms of paper, paper boards, paper film composite materials, aramid fiber mica paper and the like. The aramid fiber insulating paper can solve various challenges in the field of electrical insulation with excellent performance, meets the performance requirements of electrical equipment on insulating materials developed towards the directions of small volume, light weight, high voltage and high load, and can also maintain good mechanical and electrical performance under severe working conditions such as high temperature, high humidity and the like.
However, although the polymer material has insulating properties, it is mostly a poor thermal conductor, and its thermal conductivity is generally lower than 0.5W/(m · K), which is much lower than that of conventional heat conductive materials such as ceramics and metals. The polymer insulating material is easy to generate heat accumulation when used for a long time or overloaded, so that the polymer insulating material is easy to generate the problems of thermal expansion, thermal degradation, dielectric property reduction and the like, and serious negative effects are brought to the service life of the material and the safety of equipment. The aramid fiber is a high polymer, the thermal conductivity coefficient of the aramid fiber is only 0.048W/(m.K), and the thermal conductivity coefficient of Nomex T410 aramid insulation paper (0.05mm specification) which is prepared by the aramid fiber and is most widely applied to the field of electrical insulation is only 0.103W/(m.K). Along with the rapid development of power electronic technology and novel semiconductor devices, more and more small-size alternating current variable frequency motors are widely applied, electrical equipment working under various complex engineering environments is increasing day by day, especially under a high-frequency working environment, heat generated by the electrical equipment can be rapidly accumulated, new requirements on mechanical strength, temperature resistance, moisture resistance, corona resistance, service life and the like of the traditional insulating material are provided, the paper-based insulating material with high strength and high thermal conductivity is urgently required to be designed and prepared, heat accumulated by a coil of the electrical equipment can be rapidly and timely transferred to heat dissipation equipment or insulating oil, the normal work of the electrical equipment is ensured, and the service life of the electrical equipment is prolonged.
At present, the main ideas of the patent technology related to the heat-conducting aramid insulating paper comprise the following two types: first, a thermally conductive filler such as aluminum nitride, aluminum oxide, boron nitride, magnesium oxide, zinc oxide, or the like is directly added to a slurry system, and a thermally conductive insulating paper is obtained by paper-making method formation and high-temperature hot pressing (also referred to as calendering in the patent) (patent application No. 201180064094.3); secondly, mixing a heat-conducting filler with a resin adhesive to obtain the resin adhesive with a heat-conducting effect, gluing (similar to dipping treatment) a base material (polyimide film in the patent) by using the resin adhesive with heat conductivity, and compounding the base material and insulating mica paper to obtain a heat-conducting insulating material (patent application number: 201510738275. X).
In the currently published chinese patent, the most representative of the two approaches for preparing the thermal conductive insulation paper is the patent "a high thermal conductive insulation aramid prepreg and a manufacturing method thereof" (patent application No. 201710680629.9). The meta-aramid paper is prepared by mixing meta-aramid chopped fibers, meta-aramid pulp fibers and hexagonal boron nitride with the particle size of 1-2 microns, papermaking and high-temperature hot-pressing treatment, meta-aramid paper is prepared, resin, a silane coupling agent and a heat-conducting filler boron nitride are prepared into a composite resin solution with heat conductivity, the meta-aramid paper is obtained by soaking the meta-aramid paper in the heat-conducting resin solution and performing high-temperature hot-pressing treatment, and finally the heat-conducting insulating prepreg is prepared. However, such methods have several problems: (1) the hexagonal boron nitride is directly added into the slurry formed by mixing the aramid chopped fibers/pulp fibers to be manufactured and formed by paper making, so that the retention rate of the boron nitride is low, and the heat conduction effect of the boron nitride is influenced; (2) the aramid chopped fiber has a smooth surface and few active groups, micron-sized boron nitride is directly added into the slurry, effective combination between the boron nitride and the aramid fiber is lacked, and only physical deposition is carried out, so that the strength and the heat-conducting property of the aramid chopped fiber are influenced; (3) the traditional aramid fiber insulating paper prepared by using chopped fibers and pulp fibers still needs high-temperature and high-pressure hot-pressing treatment to ensure the strength, and has complex process and large equipment investment; (4) the composite resin solution formed by the silane coupling agent and the resin is used for impregnating the aramid paper, the process is complex, the prepared aramid insulating paper becomes a prepreg after being impregnated with the thermal conductive resin adhesive, the insulating aramid prepreg has certain thermal conductivity, the rigidity and brittleness of the insulating aramid prepreg are increased, the flexibility of the aramid paper is lost, and the application field of the aramid paper is limited. Therefore, no related technology of aramid insulating paper with high strength, high heat conductivity, excellent flexibility, simple preparation process and no need of hot pressing exists in the currently published patents.
Disclosure of Invention
The invention aims to provide heat-conducting aramid fiber nano insulating paper and a preparation method thereof, aiming at overcoming the defects in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the heat-conducting aramid nano insulating paper is composed of aramid nano fibers and nano boron nitride, and the mass ratio of the aramid nano fibers to the nano boron nitride is (60-90) to (10-40); the nano boron nitride is hydroxylated nano boron nitride.
Furthermore, the aramid nano-fiber is prepared from one of para-aramid chopped fiber, para-aramid yarn and para-aramid pulp fiber serving as a raw material in a potassium hydroxide and dimethyl sulfoxide mixed solution system, and the diameter of the aramid nano-fiber is 15-30 nm, and the length of the aramid nano-fiber is 3-10 microns.
Furthermore, the crystal form of the hydroxylated nano boron nitride is hexagonal crystal whisker and has a sheet-like structure, and the particle size of the hydroxylated nano boron nitride is 60-120 nm.
Furthermore, the hydroxylated nano boron nitride is prepared by taking nano boron nitride as a raw material and using a sodium hydroxide solution with the mass concentration of 20-60% under the auxiliary action of ultrasonic waves, wherein the mass of the boron nitride added into each 1mL of the sodium hydroxide solution is 2-10 mg, the ultrasonic power is 300-900W, and the ultrasonic treatment time is 30-150 min.
A preparation method of heat-conducting aramid nano insulating paper comprises the following steps:
the method comprises the following steps: preparing an aramid nanofiber dispersion liquid A;
step two: preparing a hydroxylated nano boron nitride dispersion liquid B;
step three: adding the hydroxylated nano boron nitride dispersion liquid B into the aramid nano fiber dispersion liquid A to prepare a slurry suspension liquid C;
step four: and (3) making, pressing and drying the slurry suspension C by using a sheet making machine to obtain the heat-conducting aramid nano insulating paper, wherein the mass ratio of the aramid nano fibers to the hydroxylated nano boron nitride in the heat-conducting aramid nano insulating paper is (60-90) to (10-40).
Further, in the step one, one of para-aramid chopped fiber, para-aramid yarn and para-aramid pulp fiber is used as a raw material, and the aramid nano-fiber dispersion liquid A is prepared in a potassium hydroxide and dimethyl sulfoxide mixed solution system.
Further, the diameter of the aramid nano-fiber in the aramid nano-fiber dispersion liquid A is 15-30 nm, and the length of the aramid nano-fiber in the aramid nano-fiber dispersion liquid A is 3-10 microns; and the mass concentration of the aramid nano-fibers in the aramid nano-fiber dispersion liquid A is 0.2-1.5%.
And further, adding the nano boron nitride into a sodium hydroxide solution in the second step, carrying out modification treatment under the ultrasonic wave assistance effect, washing the obtained product by using deionized water after the treatment is finished until the pH value of the filtrate is neutral, and then dispersing the obtained product in water to obtain a hydroxylated nano boron nitride dispersion liquid B.
Further, the particle size of the nano boron nitride is 60-120 nm, the mass concentration of the sodium hydroxide solution is 20-60%, the mass of the boron nitride added into each 1mL of the sodium hydroxide solution is 2-10 mg, the ultrasonic power is 300-900W, the ultrasonic treatment time is 30-150 min, and the mass concentration of the hydroxylated nano boron nitride in the hydroxylated nano boron nitride dispersion liquid B is 0.5-2.0%.
Further, the concentration of the slurry suspension C in the third step is 0.5-2 mg/ml.
Compared with the prior art, the invention has the following beneficial technical effects:
the aramid fiber nano-fiber provided by the invention has a nano-scale structure, high strength, large length-diameter ratio, good temperature resistance and good insulativity and is used as a matrix, so that the aramid fiber nano-insulation paper is endowed with excellent mechanical property, insulation property, temperature resistance, flexibility and the like; the hydroxylated nano boron nitride is used as a heat conduction filler and dispersed in the aramid nano fiber matrix to be used as a main carrier of heat conduction, so that the aramid nano insulating paper is endowed with high heat conductivity, and the insulating property of the aramid nano insulating paper cannot be influenced. The invention solves the problems that the prior aramid fiber insulating paper has low thermal conductivity and affects the heat dissipation and the service life of electrical insulating equipment; the problems of low boron nitride retention rate, lack of binding force between boron nitride and fibers and the like caused by directly adding micron-sized boron nitride into the slurry are avoided; the problems of hard and brittle insulating paper, complex process and the like caused by the thermal conductivity composite resin impregnation process are avoided.
The aramid nano-fiber adopted by the invention not only has a unique nano-scale structure, a large length-diameter ratio and a large specific surface area, and abundant active groups, but also retains the excellent mechanical property and temperature resistance of the aramid macro-fiber, thereby bringing the mechanical property and the insulating property which cannot be realized by the conventional chemical fiber to the aramid nano-fiber, and the aramid nano-insulating paper prepared from the aramid nano-fiber has excellent mechanical property and insulating property, and does not need a high-temperature high-pressure hot-pressing treatment process required in the preparation process of the traditional aramid paper; the hydroxylated nano boron nitride is used as a heat-conducting filler, and a good crosslinking composite effect can be generated between the flaky nano structure of the hydroxylated nano boron nitride and the aramid nano fiber; meanwhile, abundant hydroxyl groups on the surface of the hydroxylated nano boron nitride can be strongly bonded with the aramid nano fibers through hydrogen bonds, so that good interface bonding is generated, interface defects and interface thermal resistance are reduced, and an excellent heat conduction effect is guaranteed.
The aramid fiber nano insulating paper with excellent mechanical strength and insulating property, high thermal conductivity and good flexibility is developed and produced by adopting a new process and a new method, the production process is simple, the traditional hot-pressing strengthening process is not needed, the aramid fiber nano insulating paper can be used as a high-performance insulating material and widely applied to the field of middle-high-end electrical insulation, the electrical insulating equipment can be developed towards miniaturization, lightening and integration, the product upgrading and technical progress of the electrical equipment insulating industry can be promoted, and the application prospect is wide.
Drawings
Fig. 1 is an SEM image of the surface of the heat-conductive aramid nano insulating paper obtained in example 4 of the present invention.
Detailed Description
Embodiments of the invention are described in further detail below:
a heat-conducting aramid nano insulating paper is provided, wherein the mass ratio of aramid nano fibers to boron nitride in the heat-conducting aramid nano insulating paper is (60-90) to (10-40); the aramid nano-fiber is prepared by taking one of para-aramid chopped fiber, para-aramid yarn and para-aramid pulp fiber as a raw material in a potassium hydroxide and dimethyl sulfoxide mixed solution system; the diameter of the aramid nano fiber is 15-30 nm, and the length of the aramid nano fiber is 3-10 mu m; the aramid nano-fiber has good dispersibility in a water phase medium; the boron nitride crystal form is a hexagonal whisker and has a lamellar structure; the boron nitride is nano boron nitride, and the particle size of the boron nitride is 60-120 nm; the nano boron nitride is modified hydroxylated nano boron nitride; the hydroxylated nano boron nitride is prepared by taking boron nitride as a raw material and utilizing a sodium hydroxide solution with the mass concentration of 20-60% under the auxiliary action of ultrasonic waves; the volume ratio of the mass of the nano boron nitride to the volume of the sodium hydroxide solution is 2-10 mg/ml; the ultrasonic treatment process conditions are as follows: ultrasonic power: 300-900W and 30-150 min of ultrasonic treatment time.
A preparation method of heat-conducting aramid nano insulating paper comprises the following steps:
the method comprises the following steps: preparing an aramid nano-fiber dispersion liquid A in a potassium hydroxide and dimethyl sulfoxide mixed solution system by taking one of para-aramid chopped fibers, para-aramid yarns and para-aramid pulp fibers as a raw material; in the aramid nano-fiber dispersion liquid A, the diameter of the aramid nano-fiber is 15-30 nm, and the length of the aramid nano-fiber is 3-10 mu m; the aramid nano-fiber dispersion liquid A can be uniformly dispersed in water, and the mass concentration of the aramid nano-fiber is 0.2-1.5%;
step two: adding nano boron nitride with the particle size of 60-120 nm into a sodium hydroxide solution with the mass concentration of 20-60%, and performing modification treatment under the auxiliary action of ultrasonic waves to obtain a hydroxylated nano boron nitride dispersion liquid B; the volume ratio of the mass of the nano boron nitride to the volume of the sodium hydroxide solution is 2-10 mg/ml; the ultrasonic treatment process conditions are as follows: ultrasonic power: 300-900W, and the ultrasonic treatment time is 30-150 min; washing the obtained product with deionized water after ultrasonic treatment until the pH value of the filtrate is neutral, and then dispersing the obtained product in water, wherein the mass concentration of the hydroxylated nano boron nitride is 0.5-2.0%;
step three: adding the hydroxylated nano boron nitride dispersion liquid B obtained in the step two into the aramid nano fiber dispersion liquid A obtained in the step one to prepare a slurry suspension liquid C, wherein the concentration of the slurry suspension liquid C is 0.5-2 mg/mL;
step four: and (3) making the slurry suspension C obtained in the third step by using a sheet making machine, squeezing and drying to obtain the heat-conducting aramid nano insulating paper, wherein the mass ratio of the aramid nano fibers to the hydroxylated nano boron nitride in the heat-conducting aramid nano insulating paper is (60-90) to (10-40).
According to the invention, the aramid nano-fiber with high strength, high modulus, high length-diameter ratio, good temperature resistance and good insulativity is used as a matrix, so that the aramid nano-insulation paper has excellent mechanical property, insulation property, temperature resistance and flexibility; the hydroxylated nano boron nitride is used as a heat conduction filler and dispersed in the aramid nano fiber matrix as a main carrier of heat conduction, so that interface combination is optimized, interface thermal resistance is reduced, high heat conductivity is given to the aramid nano fiber matrix, and the insulating property of the aramid nano insulating paper is not influenced. The invention solves the problems that the prior aramid fiber insulating paper has low thermal conductivity and affects the heat dissipation and the service life of electrical insulating equipment; meanwhile, the problems of hard and brittle insulating paper, complex process and the like caused by the thermal conductivity composite resin impregnation process are avoided.
The present invention is described in further detail below with reference to examples:
example 1
The heat-conducting aramid nano insulating paper is characterized in that the mass ratio of aramid nano fibers to boron nitride in the heat-conducting aramid nano insulating paper is 90: 10; the aramid nano-fiber is prepared by taking para-aramid yarn as a raw material in a potassium hydroxide and dimethyl sulfoxide mixed solution system; the diameter of the aramid nano fiber is 15-30 nm, and the length of the aramid nano fiber is 7-10 mu m; the aramid nano-fiber has good dispersibility in a water phase medium; the boron nitride crystal form is a hexagonal whisker and has a lamellar structure; the boron nitride is nano boron nitride, and the particle size of the boron nitride is 60-120 nm; the nano boron nitride is modified hydroxylated nano boron nitride; the hydroxylated nano boron nitride is prepared by taking boron nitride as a raw material and utilizing a sodium hydroxide solution with the mass concentration of 20% under the auxiliary action of ultrasonic waves; the volume ratio of the mass of the nano boron nitride to the volume of the sodium hydroxide solution is 2 mg/ml; the ultrasonic treatment process conditions are as follows: ultrasonic power: 900W, and the ultrasonic treatment time is 30 min.
A preparation method of heat-conducting aramid nano insulating paper comprises the following steps:
the method comprises the following steps: preparing an aramid nano-fiber dispersion liquid A in a potassium hydroxide and dimethyl sulfoxide mixed solution system by taking para-aramid yarns as raw materials; in the aramid nano-fiber dispersion liquid A, the diameter of the aramid nano-fiber is 15-30 nm, and the length of the aramid nano-fiber is 7-10 mu m; the aramid nano-fiber dispersion liquid A can be uniformly dispersed in water, and the mass concentration of the aramid nano-fiber is 0.2%;
step two: adding nano boron nitride with the particle size of 60-120 nm into a sodium hydroxide solution with the mass concentration of 20%, and performing modification treatment under the auxiliary action of ultrasonic waves to obtain a hydroxylated nano boron nitride dispersion liquid B; the volume ratio of the mass of the nano boron nitride to the volume of the sodium hydroxide solution is 2 mg/ml; the ultrasonic treatment process conditions are as follows: ultrasonic power: 900W, and the ultrasonic treatment time is 30 min; washing with deionized water after ultrasonic treatment until the pH of the filtrate is neutral, and dispersing in water, wherein the mass concentration of the hydroxylated nano boron nitride is 0.5%;
step three: adding the hydroxylated nano boron nitride dispersion liquid B obtained in the step two into the aramid nano fiber dispersion liquid A obtained in the step one to prepare a slurry suspension liquid C, wherein the concentration of the slurry suspension liquid C is 0.5 mg/mL;
step four: and (3) making the slurry suspension C obtained in the third step by using a sheet making machine, squeezing and drying to obtain the heat-conducting aramid nano insulating paper, wherein the mass ratio of the aramid nano fibers to the hydroxylated nano boron nitride in the heat-conducting aramid nano insulating paper is 90: 10.
Example 2
The heat-conducting aramid nano insulating paper is characterized in that the mass ratio of aramid nano fibers to boron nitride in the heat-conducting aramid nano insulating paper is 85: 15; the aramid nano-fiber is prepared by taking para-aramid chopped fiber as a raw material in a potassium hydroxide and dimethyl sulfoxide mixed solution system; the diameter of the aramid nano fiber is 15-30 nm, and the length of the aramid nano fiber is 5-7 mu m; the aramid nano-fiber has good dispersibility in a water phase medium; the boron nitride crystal form is a hexagonal whisker and has a lamellar structure; the boron nitride is nano boron nitride, and the particle size of the boron nitride is 60-120 nm; the nano boron nitride is modified hydroxylated nano boron nitride; the hydroxylated nano boron nitride is prepared by taking boron nitride as a raw material and utilizing a sodium hydroxide solution with the mass concentration of 30% under the auxiliary action of ultrasonic waves; the volume ratio of the mass of the nano boron nitride to the volume of the sodium hydroxide solution is 3 mg/ml; the ultrasonic treatment process conditions are as follows: ultrasonic power: 800W, and the ultrasonic treatment time is 45 min.
A preparation method of heat-conducting aramid nano insulating paper comprises the following steps:
the method comprises the following steps: preparing an aramid nano-fiber dispersion liquid A in a potassium hydroxide and dimethyl sulfoxide mixed solution system by taking para-aramid chopped fibers as raw materials; in the aramid nano-fiber dispersion liquid A, the diameter of the aramid nano-fiber is 15-30 nm, and the length of the aramid nano-fiber is 5-7 mu m; the aramid nano-fiber dispersion liquid A can be uniformly dispersed in water, and the mass concentration of the aramid nano-fiber is 0.4%;
step two: adding nano boron nitride with the particle size of 60-120 nm into a sodium hydroxide solution with the mass concentration of 30%, and performing modification treatment under the auxiliary action of ultrasonic waves to obtain a hydroxylated nano boron nitride dispersion liquid B; the volume ratio of the mass of the nano boron nitride to the volume of the sodium hydroxide solution is 3 mg/ml; the ultrasonic treatment process conditions are as follows: ultrasonic power: 800W, and the ultrasonic treatment time is 45 min; washing with deionized water after ultrasonic treatment until the pH of the filtrate is neutral, and dispersing in water, wherein the mass concentration of the hydroxylated nano boron nitride is 0.8%;
step three: adding the hydroxylated nano boron nitride dispersion liquid B obtained in the step two into the aramid nano fiber dispersion liquid A obtained in the step one to prepare a slurry suspension liquid C, wherein the concentration of the slurry suspension liquid C is 0.7 mg/mL;
step four: and (3) making the slurry suspension C obtained in the third step by using a sheet making machine, squeezing and drying to obtain the heat-conducting aramid nano insulating paper, wherein the mass ratio of the aramid nano fibers to the hydroxylated nano boron nitride in the heat-conducting aramid nano insulating paper is 85: 15.
Example 3
The heat-conducting aramid nano insulating paper is characterized in that the mass ratio of aramid nano fibers to boron nitride in the heat-conducting aramid nano insulating paper is 80: 20; the aramid nano-fiber is prepared by taking para-aramid pulp fiber as a raw material in a potassium hydroxide and dimethyl sulfoxide mixed solution system; the diameter of the aramid nano fiber is 15-30 nm, and the length of the aramid nano fiber is 3-5 mu m; the aramid nano-fiber has good dispersibility in a water phase medium; the boron nitride crystal form is a hexagonal whisker and has a lamellar structure; the boron nitride is nano boron nitride, and the particle size of the boron nitride is 60-120 nm; the nano boron nitride is modified hydroxylated nano boron nitride; the hydroxylated nano boron nitride is prepared by taking boron nitride as a raw material and utilizing a sodium hydroxide solution with the mass concentration of 40% under the auxiliary action of ultrasonic waves; the volume ratio of the mass of the nano boron nitride to the volume of the sodium hydroxide solution is 4 mg/ml; the ultrasonic treatment process conditions are as follows: ultrasonic power: 700W, and the ultrasonic treatment time is 60 min.
A preparation method of heat-conducting aramid nano insulating paper comprises the following steps:
the method comprises the following steps: preparing an aramid nano-fiber dispersion liquid A in a potassium hydroxide and dimethyl sulfoxide mixed solution system by taking para-aramid pulp fiber as a raw material; in the aramid nano-fiber dispersion liquid A, the diameter of the aramid nano-fiber is 15-30 nm, and the length of the aramid nano-fiber is 3-5 mu m; the aramid nano-fiber dispersion liquid A can be uniformly dispersed in water, and the mass concentration of the aramid nano-fiber is 0.5%;
step two: adding nano boron nitride with the particle size of 60-120 nm into a sodium hydroxide solution with the mass concentration of 40%, and performing modification treatment under the auxiliary action of ultrasonic waves to obtain a hydroxylated nano boron nitride dispersion liquid B; the volume ratio of the mass of the nano boron nitride to the volume of the sodium hydroxide solution is 4 mg/ml; the ultrasonic treatment process conditions are as follows: ultrasonic power: 700W, and the ultrasonic treatment time is 60 min; washing with deionized water after ultrasonic treatment until the pH of the filtrate is neutral, and dispersing in water, wherein the mass concentration of the hydroxylated nano boron nitride is 1.0%;
step three: adding the hydroxylated nano boron nitride dispersion liquid B obtained in the step two into the aramid nano fiber dispersion liquid A obtained in the step one to prepare a slurry suspension liquid C, wherein the concentration of the slurry suspension liquid C is 0.9 mg/mL;
step four: and (3) making the slurry suspension C obtained in the third step by using a sheet making machine, squeezing and drying to obtain the heat-conducting aramid nano insulating paper, wherein the mass ratio of the aramid nano fibers to the hydroxylated nano boron nitride in the heat-conducting aramid nano insulating paper is 80: 20.
Example 4
The heat-conducting aramid nano insulating paper is characterized in that the mass ratio of aramid nano fibers to boron nitride in the heat-conducting aramid nano insulating paper is 75: 25; the aramid nano-fiber is prepared by taking para-aramid chopped fiber as a raw material in a potassium hydroxide and dimethyl sulfoxide mixed solution system; the diameter of the aramid nano fiber is 15-30 nm, and the length of the aramid nano fiber is 5-7 mu m; the aramid nano-fiber has good dispersibility in a water phase medium; the boron nitride crystal form is a hexagonal whisker and has a lamellar structure; the boron nitride is nano boron nitride, and the particle size of the boron nitride is 60-120 nm; the nano boron nitride is modified hydroxylated nano boron nitride; the hydroxylated nano boron nitride is prepared by taking boron nitride as a raw material and utilizing a sodium hydroxide solution with the mass concentration of 50% under the auxiliary action of ultrasonic waves; the volume ratio of the mass of the nano boron nitride to the volume of the sodium hydroxide solution is 5 mg/ml; the ultrasonic treatment process conditions are as follows: ultrasonic power: 600W and the ultrasonic treatment time is 75 min.
A preparation method of heat-conducting aramid nano insulating paper comprises the following steps:
the method comprises the following steps: preparing an aramid nano-fiber dispersion liquid A in a potassium hydroxide and dimethyl sulfoxide mixed solution system by taking para-aramid chopped fibers as raw materials; in the aramid nano-fiber dispersion liquid A, the diameter of the aramid nano-fiber is 15-30 nm, and the length of the aramid nano-fiber is 5-7 mu m; the aramid nano-fiber dispersion liquid A can be uniformly dispersed in water, and the mass concentration of the aramid nano-fiber is 0.7%;
step two: adding nano boron nitride with the particle size of 60-120 nm into a 50% sodium hydroxide solution, and performing modification treatment under the auxiliary action of ultrasonic waves to obtain a hydroxylated nano boron nitride dispersion liquid B; the volume ratio of the mass of the nano boron nitride to the volume of the sodium hydroxide solution is 5 mg/ml; the ultrasonic treatment process conditions are as follows: ultrasonic power: 600W, and the ultrasonic treatment time is 75 min; washing with deionized water after ultrasonic treatment until the pH of the filtrate is neutral, and dispersing in water, wherein the mass concentration of the hydroxylated nano boron nitride is 1.2%;
step three: adding the hydroxylated nano boron nitride dispersion liquid B obtained in the step two into the aramid nano fiber dispersion liquid A obtained in the step one to prepare a slurry suspension liquid C, wherein the concentration of the slurry suspension liquid C is 1.0 mg/mL;
step four: and (3) making the slurry suspension C obtained in the third step by using a sheet making machine, squeezing and drying to obtain the heat-conducting aramid nano insulating paper, wherein the mass ratio of the aramid nano fibers to the hydroxylated nano boron nitride in the heat-conducting aramid nano insulating paper is 75: 25.
Example 5
The heat-conducting aramid nano insulating paper is characterized in that the mass ratio of aramid nano fibers to boron nitride in the heat-conducting aramid nano insulating paper is 70: 30; the aramid nano-fiber is prepared by taking para-aramid yarn as a raw material in a potassium hydroxide and dimethyl sulfoxide mixed solution system; the diameter of the aramid nano fiber is 15-30 nm, and the length of the aramid nano fiber is 7-10 mu m; the aramid nano-fiber has good dispersibility in a water phase medium; the boron nitride crystal form is a hexagonal whisker and has a lamellar structure; the boron nitride is nano boron nitride, and the particle size of the boron nitride is 60-120 nm; the nano boron nitride is modified hydroxylated nano boron nitride; the hydroxylated nano boron nitride is prepared by taking boron nitride as a raw material and utilizing a sodium hydroxide solution with the mass concentration of 60% under the auxiliary action of ultrasonic waves; the volume ratio of the mass of the nano boron nitride to the volume of the sodium hydroxide solution is 7 mg/ml; the ultrasonic treatment process conditions are as follows: ultrasonic power: 500W, and the ultrasonic treatment time is 100 min.
A preparation method of heat-conducting aramid nano insulating paper comprises the following steps:
the method comprises the following steps: preparing an aramid nano-fiber dispersion liquid A in a potassium hydroxide and dimethyl sulfoxide mixed solution system by taking para-aramid yarns as raw materials; in the aramid nano-fiber dispersion liquid A, the diameter of the aramid nano-fiber is 15-30 nm, and the length of the aramid nano-fiber is 7-10 mu m; the aramid nano-fiber dispersion liquid A can be uniformly dispersed in water, and the mass concentration of the aramid nano-fiber is 1.0%;
step two: adding nano boron nitride with the particle size of 60-120 nm into a sodium hydroxide solution with the mass concentration of 60%, and performing modification treatment under the auxiliary action of ultrasonic waves to obtain a hydroxylated nano boron nitride dispersion liquid B; the volume ratio of the mass of the nano boron nitride to the volume of the sodium hydroxide solution is 7 mg/ml; the ultrasonic treatment process conditions are as follows: ultrasonic power: 500W, and the ultrasonic treatment time is 100 min; washing with deionized water after ultrasonic treatment until the pH of the filtrate is neutral, and dispersing in water, wherein the mass concentration of the hydroxylated nano boron nitride is 1.4%;
step three: adding the hydroxylated nano boron nitride dispersion liquid B obtained in the step two into the aramid nano fiber dispersion liquid A obtained in the step one to prepare a slurry suspension liquid C, wherein the concentration of the slurry suspension liquid C is 1.3 mg/mL;
step four: and (3) making the slurry suspension C obtained in the third step by using a sheet making machine, squeezing and drying to obtain the heat-conducting aramid nano insulating paper, wherein the mass ratio of the aramid nano fibers to the hydroxylated nano boron nitride in the heat-conducting aramid nano insulating paper is 70: 30.
Example 6
The heat-conducting aramid nano insulating paper is characterized in that the mass ratio of aramid nano fibers to boron nitride in the heat-conducting aramid nano insulating paper is 65: 35; the aramid nano-fiber is prepared by taking para-aramid pulp fiber as a raw material in a potassium hydroxide and dimethyl sulfoxide mixed solution system; the diameter of the aramid nano fiber is 15-30 nm, and the length of the aramid nano fiber is 3-5 mu m; the aramid nano-fiber has good dispersibility in a water phase medium; the boron nitride crystal form is a hexagonal whisker and has a lamellar structure; the boron nitride is nano boron nitride, and the particle size of the boron nitride is 60-120 nm; the nano boron nitride is modified hydroxylated nano boron nitride; the hydroxylated nano boron nitride is prepared by taking boron nitride as a raw material and utilizing 35% sodium hydroxide solution by mass concentration under the auxiliary action of ultrasonic waves; the volume ratio of the mass of the nano boron nitride to the volume of the sodium hydroxide solution is 8 mg/ml; the ultrasonic treatment process conditions are as follows: ultrasonic power: 400W, and the ultrasonic treatment time is 120 min.
A preparation method of heat-conducting aramid nano insulating paper comprises the following steps:
the method comprises the following steps: preparing an aramid nano-fiber dispersion liquid A in a potassium hydroxide and dimethyl sulfoxide mixed solution system by taking para-aramid pulp fiber as a raw material; in the aramid nano-fiber dispersion liquid A, the diameter of the aramid nano-fiber is 15-30 nm, and the length of the aramid nano-fiber is 3-5 mu m; the aramid nano-fiber dispersion liquid A can be uniformly dispersed in water, and the mass concentration of the aramid nano-fiber is 1.2%;
step two: adding nano boron nitride with the particle size of 60-120 nm into a sodium hydroxide solution with the mass concentration of 35%, and performing modification treatment under the auxiliary action of ultrasonic waves to obtain a hydroxylated nano boron nitride dispersion liquid B; the volume ratio of the mass of the nano boron nitride to the volume of the sodium hydroxide solution is 8 mg/ml; the ultrasonic treatment process conditions are as follows: ultrasonic power: 400W, and the ultrasonic treatment time is 120 min; washing with deionized water after ultrasonic treatment until the pH of the filtrate is neutral, and dispersing in water, wherein the mass concentration of the hydroxylated nano boron nitride is 1.6%;
step three: adding the hydroxylated nano boron nitride dispersion liquid B obtained in the step two into the aramid nano fiber dispersion liquid A obtained in the step one to prepare a slurry suspension liquid C, wherein the concentration of the slurry suspension liquid C is 1.6 mg/mL;
step four: and (3) making the slurry suspension C obtained in the third step by using a sheet making machine, squeezing and drying to obtain the heat-conducting aramid nano insulating paper, wherein the mass ratio of the aramid nano fibers to the hydroxylated nano boron nitride in the heat-conducting aramid nano insulating paper is 65: 35.
Example 7
The heat-conducting aramid nano insulating paper is characterized in that the mass ratio of aramid nano fibers to boron nitride in the heat-conducting aramid nano insulating paper is 60: 40; the aramid nano-fiber is prepared by taking para-aramid chopped fiber as a raw material in a potassium hydroxide and dimethyl sulfoxide mixed solution system; the diameter of the aramid nano fiber is 15-30 nm, and the length of the aramid nano fiber is 5-7 mu m; the aramid nano-fiber has good dispersibility in a water phase medium; the boron nitride crystal form is a hexagonal whisker and has a lamellar structure; the boron nitride is nano boron nitride, and the particle size of the boron nitride is 60-120 nm; the nano boron nitride is modified hydroxylated nano boron nitride; the hydroxylated nano boron nitride is prepared by taking boron nitride as a raw material and utilizing a sodium hydroxide solution with the mass concentration of 45% under the auxiliary action of ultrasonic waves; the volume ratio of the mass of the nano boron nitride to the volume of the sodium hydroxide solution is 10 mg/ml; the ultrasonic treatment process conditions are as follows: ultrasonic power: 300W and the ultrasonic treatment time is 150 min.
A preparation method of heat-conducting aramid nano insulating paper comprises the following steps:
the method comprises the following steps: preparing an aramid nano-fiber dispersion liquid A in a potassium hydroxide and dimethyl sulfoxide mixed solution system by taking para-aramid chopped fibers as raw materials; in the aramid nano-fiber dispersion liquid A, the diameter of the aramid nano-fiber is 15-30 nm, and the length of the aramid nano-fiber is 5-7 mu m; the aramid nano-fiber dispersion liquid A can be uniformly dispersed in water, and the mass concentration of the aramid nano-fiber is 1.5%;
step two: adding nano boron nitride with the particle size of 60-120 nm into a 45% sodium hydroxide solution, and performing modification treatment under the ultrasonic wave assistance effect to obtain a hydroxylated nano boron nitride dispersion liquid B; the volume ratio of the mass of the nano boron nitride to the volume of the sodium hydroxide solution is 10 mg/ml; the ultrasonic treatment process conditions are as follows: ultrasonic power: 300W, and the ultrasonic treatment time is 150 min; washing with deionized water after ultrasonic treatment until the pH of the filtrate is neutral, and dispersing in water, wherein the mass concentration of the hydroxylated nano boron nitride is 2.0%;
step three: adding the hydroxylated nano boron nitride dispersion liquid B obtained in the step two into the aramid nano fiber dispersion liquid A obtained in the step one to prepare a slurry suspension liquid C, wherein the concentration of the slurry suspension liquid C is 2 mg/mL;
step four: and (3) making the slurry suspension C obtained in the third step by using a sheet making machine, squeezing and drying to obtain the heat-conducting aramid nano insulating paper, wherein the mass ratio of the aramid nano fibers to the hydroxylated nano boron nitride in the heat-conducting aramid nano insulating paper is 60: 40.
The heat-conducting aramid nano insulating paper prepared in embodiment 4 of the invention is detected and characterized, and part of indexes are as follows: 1. quantification: 30.0m2(ii)/g; 2. tensile strength: 67.0 MPa; 3. elongation at break of 5.6%; 4. modulus of 2.59 GPa; 5. compressive strength: 66.8 kV/mm; 6. TG (gamma-10％: 537.2 deg.C; 7. the thermal conductivity was 1.352W/(mK). The heat-conducting aramid nano insulating paper prepared by the invention has good mechanical property and thermal stability, and also has excellent compressive strength and heat-conducting property. The aramid fiber nano insulating paper with high strength, high thermal conductivity and good flexibility is developed and produced by adopting a new process and a new method, the production process is simple, hot-pressing reinforcement is not needed, the aramid fiber nano insulating paper can be used as a high-end insulating material in electrical insulating equipment developing towards miniaturization, lightening and integration, and the application prospect is wide.
Claims (6)
1. The heat-conducting aramid nano insulating paper is characterized by comprising aramid nano fibers and nano boron nitride, wherein the mass ratio of the aramid nano fibers to the nano boron nitride is (60-90) to (10-40); the nano boron nitride is hydroxylated nano boron nitride; the crystal form of the hydroxylated nano boron nitride is hexagonal crystal whisker and is of a sheet structure, the particle size of the hydroxylated nano boron nitride is 60-120 nm, the hydroxylated nano boron nitride is prepared by taking the nano boron nitride as a raw material and utilizing a sodium hydroxide solution with the mass concentration of 20-60% under the auxiliary action of ultrasonic waves, 2-10 mg of boron nitride is added into every 1mL of the sodium hydroxide solution, the ultrasonic power is 300-900W, and the ultrasonic treatment time is 30-150 min.
2. The heat-conducting aramid nano insulation paper as claimed in claim 1, wherein the aramid nano fibers are prepared from one of para-aramid chopped fibers, para-aramid yarns and para-aramid pulp fibers in a mixed solution system of potassium hydroxide and dimethyl sulfoxide, and have diameters of 15-30 nm and lengths of 3-10 μm.
3. A preparation method of heat-conducting aramid nano insulating paper is characterized by comprising the following steps:
the method comprises the following steps: preparing an aramid nanofiber dispersion liquid A;
step two: adding nano boron nitride into a sodium hydroxide solution, carrying out modification treatment under the assistance of ultrasonic waves, washing the obtained product by using deionized water after the treatment is finished until the pH value of the filtrate is neutral, and then dispersing the obtained product in water to obtain a hydroxylated nano boron nitride dispersion liquid B;
the particle size of the nano boron nitride is 60-120 nm, the mass concentration of a sodium hydroxide solution is 20-60%, the mass of boron nitride added into each 1mL of the sodium hydroxide solution is 2-10 mg, the ultrasonic power is 300-900W, the ultrasonic treatment time is 30-150 min, and the mass concentration of hydroxylated nano boron nitride in the hydroxylated nano boron nitride dispersion liquid B is 0.5-2.0%;
step three: adding the hydroxylated nano boron nitride dispersion liquid B into the aramid nano fiber dispersion liquid A to prepare a slurry suspension liquid C;
step four: and (3) making, pressing and drying the slurry suspension C by using a sheet making machine to obtain the heat-conducting aramid nano insulating paper, wherein the mass ratio of the aramid nano fibers to the hydroxylated nano boron nitride in the heat-conducting aramid nano insulating paper is (60-90) to (10-40).
4. The method for preparing the heat-conducting aramid nano insulating paper as claimed in claim 3, wherein in the step one, one of para-aramid chopped fiber, para-aramid yarn and para-aramid pulp fiber is used as a raw material, and the aramid nano fiber dispersion liquid A is prepared in a potassium hydroxide and dimethyl sulfoxide mixed solution system.
5. The preparation method of the heat-conducting aramid nano insulating paper according to claim 4, wherein the diameter of the aramid nano fiber in the aramid nano fiber dispersion liquid A is 15-30 nm, and the length of the aramid nano fiber in the aramid nano fiber dispersion liquid A is 3-10 μm; and the mass concentration of the aramid nano-fibers in the aramid nano-fiber dispersion liquid A is 0.2-1.5%.
6. The preparation method of the heat-conducting aramid nano insulating paper as claimed in claim 3, wherein the concentration of the slurry suspension C in the third step is 0.5-2 mg/ml.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810838115.6A CN108978328B (en) | 2018-07-26 | 2018-07-26 | Heat-conducting aramid nano insulating paper and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810838115.6A CN108978328B (en) | 2018-07-26 | 2018-07-26 | Heat-conducting aramid nano insulating paper and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108978328A CN108978328A (en) | 2018-12-11 |
| CN108978328B true CN108978328B (en) | 2020-12-29 |
Family
ID=64551571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810838115.6A Active CN108978328B (en) | 2018-07-26 | 2018-07-26 | Heat-conducting aramid nano insulating paper and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108978328B (en) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109721750A (en) * | 2018-12-14 | 2019-05-07 | 华南理工大学 | A kind of low-dielectric constant nano aramid fiber/boron nitride thermally conductive film and preparation method thereof |
| CN109930226B (en) * | 2019-04-08 | 2020-07-31 | 四川大学 | High-thermal-conductivity viscose composite material and preparation method thereof |
| CN110004712B (en) * | 2019-04-08 | 2021-09-07 | 上海电力学院 | Preparation method of high-strength heat-conducting film based on Kevlar nanofibers |
| CN110117416B (en) * | 2019-04-19 | 2022-08-19 | 陕西科技大学 | Ti 2 C 3 Electromagnetic shielding composite material of/para-aramid nano-fiber and preparation method thereof |
| CN110106737B (en) * | 2019-06-10 | 2022-01-14 | 陕西科技大学 | Preparation method of aramid nanofiber/mica composite insulating paper |
| CN110229517A (en) * | 2019-06-21 | 2019-09-13 | 陕西科技大学 | A kind of hexagonal boron nitride/p-aramid fiber nano-fiber composite material and preparation method thereof |
| CN110229518A (en) * | 2019-06-21 | 2019-09-13 | 陕西科技大学 | Modified hexagonal boron nitride/p-aramid fiber nano-fiber composite material of a kind of dopamine and preparation method thereof |
| CN110284358A (en) * | 2019-06-26 | 2019-09-27 | 陕西科技大学 | A kind of preparation method of aramid nano-fiber/montmorillonite insulating materials |
| CN110258170A (en) * | 2019-06-26 | 2019-09-20 | 陕西科技大学 | A kind of Nano silver grain modification hexagonal boron nitride/aramid nano-fiber heat-conductive composite material preparation method |
| CN110485195B (en) * | 2019-08-26 | 2020-07-24 | 湖南大学 | Aramid nanofiber-based insulating paper and preparation method thereof |
| CN113002082A (en) * | 2021-02-07 | 2021-06-22 | 中国科学院合肥物质科学研究院 | Biomass-based high-thermal-conductivity flexible composite membrane and preparation method thereof |
| CN113079451B (en) * | 2021-03-29 | 2023-05-05 | 国光电器股份有限公司 | Foaming cone for loudspeaker and preparation method and application thereof |
| CN113463446A (en) * | 2021-05-24 | 2021-10-01 | 广西大学 | Preparation method of high-thermal-conductivity composite nano modified insulating paper |
| CN113684727A (en) * | 2021-07-26 | 2021-11-23 | 通城县云水云母科技有限公司 | Basalt/aramid paper-based insulating material and production method thereof |
| CN114481355A (en) * | 2022-02-17 | 2022-05-13 | 苏州鸿凌达电子科技股份有限公司 | Method for preparing heat-conducting insulating film based on hexagonal boron nitride |
| CN114875709B (en) * | 2022-05-19 | 2023-01-10 | 烟台民士达特种纸业股份有限公司 | Preparation method of heat-conducting aramid insulating paper for high-frequency high-voltage electrical equipment |
| CN115506176A (en) * | 2022-10-12 | 2022-12-23 | 烟台民士达特种纸业股份有限公司 | Aramid insulating paper base material for motor slot insulation and preparation method thereof |
| CN115787344A (en) * | 2022-11-17 | 2023-03-14 | 四川大学 | Preparation method of high-strength, high-thermal-conductivity and high-heat-resistance insulating aramid nanofiber composite paper |
| CN116289296B (en) * | 2023-03-29 | 2024-04-05 | 华南理工大学 | Heat-conducting and insulating industrial aramid paper and preparation method thereof |
| CN116497625A (en) * | 2023-05-04 | 2023-07-28 | 山东仁丰特种材料股份有限公司 | Composite aramid paper and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5055000B2 (en) * | 2007-03-29 | 2012-10-24 | 株式会社日立製作所 | Fiber-reinforced composite resin composition and method for producing the same |
| CN104072988A (en) * | 2014-06-18 | 2014-10-01 | 深圳昊天龙邦复合材料有限公司 | High-heat-conductive boron nitride insulation material and preparation method thereof |
| CN107541985A (en) * | 2017-08-10 | 2018-01-05 | 华南理工大学 | A kind of high heat conductive insulating aramid fiber prepreg and its manufacture method |
| CN107903441A (en) * | 2017-11-14 | 2018-04-13 | 四川大学 | It is a kind of to improve polymer breakdown strength and the method for energy storage density |
| CN108285540A (en) * | 2018-02-11 | 2018-07-17 | 陕西科技大学 | A kind of preparation method of aramid nano-fiber water-dispersed and aramid fiber nanometer paper |
-
2018
- 2018-07-26 CN CN201810838115.6A patent/CN108978328B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5055000B2 (en) * | 2007-03-29 | 2012-10-24 | 株式会社日立製作所 | Fiber-reinforced composite resin composition and method for producing the same |
| CN104072988A (en) * | 2014-06-18 | 2014-10-01 | 深圳昊天龙邦复合材料有限公司 | High-heat-conductive boron nitride insulation material and preparation method thereof |
| CN107541985A (en) * | 2017-08-10 | 2018-01-05 | 华南理工大学 | A kind of high heat conductive insulating aramid fiber prepreg and its manufacture method |
| CN107903441A (en) * | 2017-11-14 | 2018-04-13 | 四川大学 | It is a kind of to improve polymer breakdown strength and the method for energy storage density |
| CN108285540A (en) * | 2018-02-11 | 2018-07-17 | 陕西科技大学 | A kind of preparation method of aramid nano-fiber water-dispersed and aramid fiber nanometer paper |
Non-Patent Citations (1)
| Title |
|---|
| Edge-Hydroxylated Boron Nitride Nanosheets as an Effective Additive to Improve the Thermal Response of Hydrogels;FengXiao ect.;《Advanced Material》;20151026;第7196-7203页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108978328A (en) | 2018-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108978328B (en) | Heat-conducting aramid nano insulating paper and preparation method thereof | |
| CN100567633C (en) | With the p-aramid fiber staple fiber aramid fiber paper of raw material and preparation method thereof | |
| CN103572640B (en) | A kind of p-aramid fiber fibrid prepares the method for p-aramid paper | |
| JP5723199B2 (en) | Conductive aramid paper and manufacturing method thereof | |
| Li et al. | Facial fabrication of aramid composite insulating paper with high strength and good thermal conductivity | |
| JP6437439B2 (en) | Conductive aramid paper and manufacturing method thereof | |
| TWI763745B (en) | Electromagnetic wave suppression sheet | |
| JP2014501859A (en) | Electrical insulation paper | |
| CN1834342A (en) | Meta aramid fibre paper and prepn. process | |
| CN111546722B (en) | Reinforced high-thermal-conductivity mica tape and preparation method thereof | |
| CN108407425A (en) | A kind of graphene-carbon nano tube fiber base heat-conducting pad and preparation method thereof | |
| EP1763563A1 (en) | Diamond like coatings of nanofillers | |
| CN111395052B (en) | Mica paper for high-insulation capacitor and preparation method thereof | |
| CN111472207A (en) | High-wear-resistance anti-aging mica paper tape and preparation method thereof | |
| TWI786278B (en) | Electromagnetic wave absorbing sheet and manufacturing method thereof | |
| JP3660765B2 (en) | Method for producing aramid composite sheet | |
| CN111549567A (en) | Modified preparation method of high-thermal-conductivity mica paper | |
| Xie et al. | Toward high-performance nanofibrillated cellulose/aramid fibrid paper-based composites via polyethyleneimine-assisted decoration of silica nanoparticle onto aramid fibrid | |
| CN113463446A (en) | Preparation method of high-thermal-conductivity composite nano modified insulating paper | |
| CN113684727A (en) | Basalt/aramid paper-based insulating material and production method thereof | |
| CN108221465B (en) | Cellulose nano-fiber/carbon fluoride tube flexible composite membrane and preparation method thereof | |
| Xie et al. | Largely enhanced mechanical and dielectric properties of paper-based composites via in situ modification of polyimide fibers with SiO 2 nanoparticles | |
| CN113652900A (en) | Basalt/aramid/mica paper and production method thereof | |
| JP4085346B2 (en) | Mica base sheet and insulation coil | |
| TWI797282B (en) | Electromagnetic wave absorbing sheet and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230105 Address after: 722405 Xisan Road, caijiapo Town, Qishan County, Baoji City, Shaanxi Province Patentee after: BAOJI KEDA SPECIAL PAPER CO.,LTD. Address before: 710021 Shaanxi province Xi'an Weiyang University Park Patentee before: SHAANXI University OF SCIENCE & TECHNOLOGY |
|
| TR01 | Transfer of patent right |