CN110836904B - Screening method for improving dispersion wettability of flaky wave-absorbing powder - Google Patents
Screening method for improving dispersion wettability of flaky wave-absorbing powder Download PDFInfo
- Publication number
- CN110836904B CN110836904B CN201910971266.3A CN201910971266A CN110836904B CN 110836904 B CN110836904 B CN 110836904B CN 201910971266 A CN201910971266 A CN 201910971266A CN 110836904 B CN110836904 B CN 110836904B
- Authority
- CN
- China
- Prior art keywords
- wave
- absorbing powder
- flaky
- screening method
- powder
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
- G01N23/225—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material using electron or ion
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N15/0205—Investigating particle size or size distribution by optical means, e.g. by light scattering, diffraction, holography or imaging
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
- G01N2001/4094—Concentrating samples by other techniques involving separation of suspended solids using ultrasound
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N2015/0288—Sorting the particles
Abstract
The invention provides a screening method for improving the dispersion wettability of sheet-shaped wave-absorbing powder, which comprises the steps of screening the sheet-shaped wave-absorbing powder, and a high-molecular polymer containing a high-efficiency anchor group, a high-molecular polyacrylate-type high-molecular polymer, a block copolymer with the high-efficiency anchor group and a unique block copolymer, N- (beta-aminoethyl-gamma-aminopropyl) trimethoxysilane, 3-aminopropyl methyl diethoxysilane, 3- (2, 3-epoxypropoxy) propyl trimethoxysilane and a 2- (3, 4-epoxycyclohexyl) ethyl triethoxysilane auxiliary agent, which are used for wetting and dispersing the wave-absorbing powder. The one or more auxiliary agents can be used for carrying out surface treatment on the surface of the flaky wave-absorbing powder, so that the surface charge of the flaky wave-absorbing powder is reduced, the surface of the wave-absorbing powder is provided with a specific group, the flaky wave-absorbing powder is convenient to screen, and the dispersibility of the flaky wave-absorbing powder in a system at a later stage is improved.
Description
Technical Field
The invention relates to the field of magnetic materials, in particular to a screening method for improving the dispersion wettability of flaky wave-absorbing powder.
Background
With the development of electronic technology, a large amount of electromagnetic waves which are not needed by the free space exist in the free space, and radiation interference and conduction interference can be generated to the outside when electronic equipment and appliances work. Electromagnetic interference has become a world-recognized fourth environmental pollution. The electromagnetic property of the anti-electromagnetic interference material made of the existing granular powder can not meet the increasingly rigorous use requirements, and a substitute is urgently needed. The flaky wave-absorbing material can solve the problem which cannot be solved by the granular powder due to high magnetic conductivity and wide use frequency. However, the flaky wave-absorbing powder has more fine crushed powder, larger surface energy and irregular shape in the processing process, so that the flaky wave-absorbing powder is difficult to disperse in a solvent at the rear end.
Disclosure of Invention
The invention aims to provide a screening method for improving the dispersion wettability of flaky wave-absorbing powder. The solvents used in the invention are all environment-friendly solvents, and the wetting dispersibility of the flaky wave-absorbing powder is improved and more concentrated powder particle size distribution is obtained by a specific screening method.
The invention provides a screening method for improving the dispersion wettability of flaky wave-absorbing powder, which specifically comprises the following steps:
the method comprises the following steps: selecting 18-32 parts of solvent, 3-7 parts of wetting dispersant and 10-15 parts of flaky wave-absorbing powder;
step two: dissolving a wetting dispersant in a solvent, and mixing and stirring for 30 minutes to obtain a uniformly mixed solution A;
step three: uniformly mixing and dispersing the mixed solution A obtained in the step two and the flaky wave-absorbing powder for 30-80 minutes, and then standing for 12-15 hours to obtain mixed solution B;
step four: pouring the mixed liquor A left in the step two into an ultrasonic generator for ultrasonic dispersion, then placing an inspection screen into the ultrasonic generator, pouring the mixed liquor B obtained in the step three into the inspection screen for ultrasonic dispersion for 10 minutes;
step five: taking out the upper layer and the lower layer of the inspection sieve in the fourth step, and carrying out solid-liquid separation;
step six: and respectively drying the upper and lower parts of the inspection screen in the fifth step.
Further, the solvent is one or a mixture of distilled water, absolute ethyl alcohol, ethylene glycol and n-butyl alcohol, and the viscosity of the solvent is more than 20 mPa.s.
Furthermore, the wetting dispersant is one or more of a high-molecular polymer containing a high-efficiency anchor group, a high-molecular polyacrylate type high-molecular polymer, a block copolymer with a high-efficiency anchor group and a unique block copolymer, N- (beta-aminoethyl-gamma-aminopropyl) trimethoxy-20 silane, 3-aminopropylmethyldiethoxy silane, 3- (2, 3-epoxypropoxy) propyltrimethoxy silane and 2- (3, 4-epoxycyclohexyl) ethyltriethoxysilane assistant.
Further, in the step five, solid-liquid separation can be performed by using a centrifugal machine or a filter press, and vacuum drying equipment can be used for drying.
Advantageous effects
The invention solves the problem that the filling rate and the appearance of the product are greatly influenced in the later period of manufacturing the finished product due to poor dispersion performance of the powder in the solution caused by larger surface energy after the flaky wave-absorbing powder is subjected to high-energy ball milling. The invention can improve the performance and filling rate of the flaky wave-absorbing powder and ensure that the produced product has good appearance by wetting and dispersing treatment and using ultrasonic wave to sieve the flaky powder meeting the requirements.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The concept and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments to fully understand the objects, features and effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.
Example one
A screening method for improving the dispersion wettability of flaky wave-absorbing powder comprises the following steps:
the method comprises the following steps: selecting 30 parts of absolute ethyl alcohol, 1 part of N- (beta-aminoethyl-gamma-aminopropyl) trimethoxy silane and 10 parts of flaky wave-absorbing powder;
step two: dissolving N- (beta-aminoethyl-gamma-aminopropyl) trimethoxysilane in absolute ethyl alcohol, mixing and stirring for 30 minutes to obtain a uniformly mixed solution A, and uniformly dividing into 30 parts;
step three: uniformly mixing 15 parts of the mixed solution A obtained in the step two with the flaky wave-absorbing powder, stirring and dispersing for 60 minutes, and then standing for 12 hours to obtain a mixed solution B;
step four: and (4) pouring the 15 parts of the mixed liquor A left in the step two into an ultrasonic generator for ultrasonic dispersion, then placing an inspection screen into the ultrasonic generator, slowly pouring the mixed liquor B obtained in the step three into the inspection screen for ultrasonic dispersion, and dispersing for 10 minutes.
Step five: taking out the upper layer and the lower layer of the inspection sieve in the fourth step, and performing solid-liquid separation on the screened powder by using a centrifugal machine;
step six: and (3) respectively placing the powder on the upper layer and the lower layer of the test sieve in the fifth step into a vacuum drying oven, drying for 60min at 50 ℃, drying for 60min at 70 ℃, drying for 60min at 110 ℃, taking out the dried powder, testing the particle size of the powder by using a laser particle size analyzer, observing the surface state of the powder by matching with a scanning electron microscope, and finally dispersing the powder in a solvent to observe the dispersibility of the powder.
Example two
A screening method for improving the dispersion wettability of flaky wave-absorbing powder specifically comprises the following steps:
the method comprises the following steps: selecting a mixed solution of absolute ethyl alcohol and ethylene glycol as a solvent, wherein the wetting dispersant is 3-aminopropyl methyl diethoxysilane and 3- (2, 3-epoxypropoxy) propyl trimethoxy silane, and 10-15 parts of sheet-shaped wave-absorbing powder;
step two: dissolving 0.5 part of 3-aminopropylmethyldiethoxysilane and 0.3 part of 3- (2, 3-epoxypropoxy) propyltrimethoxysilane in a mixed solution of 10 parts of absolute ethyl alcohol and 20 parts of ethylene glycol, and mixing and stirring for 30 minutes to obtain a uniformly mixed solution A, wherein the uniformly mixed solution A is uniformly divided into 30 parts;
step three: uniformly mixing 15 parts of the mixed solution A obtained in the step two with the flaky wave-absorbing powder, dispersing for 80 minutes, and standing for 15 hours to obtain a mixed solution B;
step four: pouring the 15 parts of the mixed liquor A left in the step two into an ultrasonic generator for ultrasonic dispersion, then placing a test screen into the ultrasonic generator, pouring the mixed liquor B obtained in the step three into the test screen for ultrasonic dispersion for 10 minutes;
step five: taking out the upper layer and the lower layer of the inspection sieve in the fourth step, and performing solid-liquid separation on the screened powder by using a centrifugal machine;
step six: and (5) respectively placing the powder on the upper layer and the lower layer of the test sieve in the fifth step into a vacuum drying oven to be dried for 120min at 70 ℃, taking out the dried powder, testing the particle size by using a laser particle size analyzer, observing the surface state of the powder by matching with a scanning electron microscope, and finally dispersing the powder in a solvent to observe the dispersibility.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (3)
1. A screening method for improving the dispersion wettability of the flaky wave-absorbing powder is characterized by comprising the following steps:
the method comprises the following steps: selecting 18-32 parts of solvent, 3-7 parts of wetting dispersant and 10-15 parts of flaky wave-absorbing powder;
step two: dissolving a wetting dispersant in a solvent, and mixing and stirring for 30 minutes to obtain a uniformly mixed solution A;
step three: uniformly mixing and dispersing the mixed solution A obtained in the step two and the sheet-shaped wave-absorbing powder for 30-80 minutes, and then standing for 12-15 hours to obtain mixed solution B;
step four: pouring the mixed liquor A left in the step two into an ultrasonic generator for ultrasonic dispersion, then placing an inspection screen into the ultrasonic generator, pouring the mixed liquor B obtained in the step three into the inspection screen for ultrasonic dispersion for 10 minutes;
step five: taking out the upper layer and the lower layer of the inspection sieve in the fourth step, and carrying out solid-liquid separation;
step six: drying the upper and lower parts of the inspection screen in the fifth step respectively;
in the first step, the wetting dispersant is one or more of high molecular polymer containing high-efficiency anchor group, high molecular polyacrylate type high molecular polymer, N- (beta-aminoethyl-gamma-aminopropyl) trimethoxy silane 20, 3-aminopropyl methyl diethoxy silane, 3- (2, 3-epoxy propoxy) propyl trimethoxy silane and 2- (3, 4-epoxy cyclohexyl) ethyl triethoxy silane auxiliaries.
2. The screening method for improving the dispersion wettability of the flaky wave-absorbing powder according to claim 1, wherein the solvent in the first step is one or a mixture of distilled water, absolute ethyl alcohol, ethylene glycol and n-butanol, and the viscosity of the solvent is greater than 20 mPa.s.
3. The screening method for improving the dispersion wettability of the flaky wave-absorbing powder according to claim 1, wherein a centrifuge or a filter press is selected for solid-liquid separation in the fifth step, and a vacuum drying device is selected for drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910971266.3A CN110836904B (en) | 2019-10-14 | 2019-10-14 | Screening method for improving dispersion wettability of flaky wave-absorbing powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910971266.3A CN110836904B (en) | 2019-10-14 | 2019-10-14 | Screening method for improving dispersion wettability of flaky wave-absorbing powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110836904A CN110836904A (en) | 2020-02-25 |
| CN110836904B true CN110836904B (en) | 2022-07-26 |
Family
ID=69575320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910971266.3A Active CN110836904B (en) | 2019-10-14 | 2019-10-14 | Screening method for improving dispersion wettability of flaky wave-absorbing powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110836904B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001044687A (en) * | 1999-07-29 | 2001-02-16 | Nitto Denko Corp | Wave absorber and its manufacture |
| CN105731973A (en) * | 2016-01-22 | 2016-07-06 | 广东美的厨房电器制造有限公司 | Easy-to-clean coating with high microwave absorbing property as well as preparation method and application thereof |
| CN105907152A (en) * | 2016-06-22 | 2016-08-31 | 广东美的厨房电器制造有限公司 | Hydrophobic and oleophobic antibacterial wave-absorbing material and preparation method thereof |
| CN106587978A (en) * | 2016-12-15 | 2017-04-26 | 陕西科技大学 | Wave absorbing material of Z-shaped ferrite flaky powder filled particulate powder and preparation method thereof |
| CN107974733A (en) * | 2016-10-21 | 2018-05-01 | 苏州今道创业投资有限公司 | The preparation method and absorbent structure of a kind of absorbing material |
| WO2018196517A1 (en) * | 2017-04-25 | 2018-11-01 | 深圳光启高等理工研究院 | Wave absorbing material and preparation method therefor |
| CN108889939A (en) * | 2018-07-10 | 2018-11-27 | 山东格物新材料科技有限公司 | A kind of corrosion-resistant powder body material and preparation method thereof that can absorb microwave |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104724691B (en) * | 2013-12-23 | 2016-11-09 | 北京阿格蕾雅科技发展有限公司 | A kind of method improving SWCN dispersiveness |
-
2019
- 2019-10-14 CN CN201910971266.3A patent/CN110836904B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001044687A (en) * | 1999-07-29 | 2001-02-16 | Nitto Denko Corp | Wave absorber and its manufacture |
| CN105731973A (en) * | 2016-01-22 | 2016-07-06 | 广东美的厨房电器制造有限公司 | Easy-to-clean coating with high microwave absorbing property as well as preparation method and application thereof |
| CN105907152A (en) * | 2016-06-22 | 2016-08-31 | 广东美的厨房电器制造有限公司 | Hydrophobic and oleophobic antibacterial wave-absorbing material and preparation method thereof |
| CN107974733A (en) * | 2016-10-21 | 2018-05-01 | 苏州今道创业投资有限公司 | The preparation method and absorbent structure of a kind of absorbing material |
| CN106587978A (en) * | 2016-12-15 | 2017-04-26 | 陕西科技大学 | Wave absorbing material of Z-shaped ferrite flaky powder filled particulate powder and preparation method thereof |
| WO2018196517A1 (en) * | 2017-04-25 | 2018-11-01 | 深圳光启高等理工研究院 | Wave absorbing material and preparation method therefor |
| CN108889939A (en) * | 2018-07-10 | 2018-11-27 | 山东格物新材料科技有限公司 | A kind of corrosion-resistant powder body material and preparation method thereof that can absorb microwave |
Non-Patent Citations (1)
| Title |
|---|
| 导电短纤维分散性对其吸波性能的影响;赵宏杰等;《功能材料》;20121231;第43卷(第23期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110836904A (en) | 2020-02-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102262914B (en) | Conductive silver paste and preparation method thereof as well as solar cell slice | |
| JP6899034B2 (en) | Epoxy resin electromagnetic wave absorption composite material and its manufacturing method | |
| CN110527404A (en) | A kind of composite modification abrasion resistant anticorrosive paint and preparation method thereof | |
| CN112662354A (en) | Silicon dioxide filler, preparation method thereof and epoxy resin composite material | |
| CN107033294A (en) | It is a kind of for conductive UV-cured resin composite of laser 3D printing and preparation method thereof | |
| CN110294945B (en) | Preparation method of blue pigment with nano particle size, photosensitive resin and color filter | |
| CN101597436B (en) | Silicon tiny powder surface treating and modifying method, epoxy resin combination and preparation method thereof | |
| CN110836904B (en) | Screening method for improving dispersion wettability of flaky wave-absorbing powder | |
| CN108384441A (en) | A kind of communication apparatus electromagnetic screen coating and preparation method thereof | |
| CN108559264B (en) | A kind of cross-linking type polyarylether sulfuryl dielectric composite material and its preparation method and application | |
| CN109401442A (en) | A kind of silver-plated electrically conductive ink of UV curing nano and preparation method thereof | |
| CN113881287A (en) | Water-based graphene conductive ink composition, water-based graphene conductive ink, and preparation method and application thereof | |
| CN105733470B (en) | A kind of denatured conductive filler, its preparation method and application | |
| JP2006316086A (en) | Liquid conductive resin composition for coating separator made of metal | |
| WO2024066335A1 (en) | Method for preparing electrode of solar cell | |
| CN110449572B (en) | Preparation method of functional silver powder for electronic paste | |
| CN1856542A (en) | Spherical composite composition and process for producing spherical composite composition | |
| CN1632001A (en) | Screening conductive coating/paint | |
| CN114709005A (en) | Silver paste for flexible transparent conductive film metal grid, preparation method and application thereof | |
| CN105907273A (en) | Method for preparing anti-static insulating paint | |
| CN107619615A (en) | Inorganic interior wall coating of a kind of net taste radiation proof and preparation method thereof | |
| CN114874624A (en) | Heat-conducting wave-absorbing room-temperature curing silicone rubber product and preparation method thereof | |
| CN105175342B (en) | A kind of method of ionic liquid and its homogeneous modified reed enhancing PE composite materials | |
| CN108728010A (en) | A kind of denatured conductive filler, preparation method and application | |
| CN107201144B (en) | A kind of conductive coating and preparation 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 |