CN108623928A - A kind of suction wave foam and preparation method thereof - Google Patents
A kind of suction wave foam and preparation method thereof Download PDFInfo
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- CN108623928A CN108623928A CN201710172674.3A CN201710172674A CN108623928A CN 108623928 A CN108623928 A CN 108623928A CN 201710172674 A CN201710172674 A CN 201710172674A CN 108623928 A CN108623928 A CN 108623928A
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- polystyrene resin
- foam
- mixed liquor
- blowing agent
- extruder
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
- C08J9/143—Halogen containing compounds
- C08J9/144—Halogen containing compounds containing carbon, halogen and hydrogen only
- C08J9/145—Halogen containing compounds containing carbon, halogen and hydrogen only only chlorine as halogen atoms
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
- C08J2203/142—Halogenated saturated hydrocarbons, e.g. H3C-CF3
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2205/00—Foams characterised by their properties
- C08J2205/04—Foams characterised by their properties characterised by the foam pores
- C08J2205/044—Micropores, i.e. average diameter being between 0,1 micrometer and 0,1 millimeter
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2325/02—Homopolymers or copolymers of hydrocarbons
- C08J2325/04—Homopolymers or copolymers of styrene
- C08J2325/06—Polystyrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/14—Applications used for foams
Abstract
The present invention provides a kind of suction wave foams and preparation method thereof, and by percent by volume, inhaling wave foam includes：50% polystyrene resin, 2.5%~10% graphene and 40%~47.5% liquid blowing agent.By the way that polystyrene resin is sent into extruder fusing；Use high-pressure charging device that the mixed liquor of liquid blowing agent and graphene is injected to the fusing section of extruder again；It is rotated and is uniformly mixed by extrusion screw rod, die extrusion；And decompression vaporization obtains the excellent suction wave foam of absorbing property to extrudate foaming and intumescing.
Description
Technical field
The present invention relates to Material Fields, more particularly, to a kind of suction wave foam and preparation method thereof.
Background technology
So-called absorbing material refers to a kind of material that can absorb the electromagnetic wave energy for projecting its surface.On engineer application,
In addition to requiring absorbing material that there is high absorptivity to electromagnetic wave in broad frequency band, also require it that there is light weight, heatproof, resistance to
The performances such as wet, anticorrosive.
Foam wave-suction material is a kind of novel structural absorbing mater ials.In engineering, the most commonly used is hard bubbles in practice at present
Foam can also be conveniently adjusted it electrically according to the performance of the wave absorbing agent used in forming process and the difference of dosage
Can, at the same also have the advantages that light weight, high temperature resistant, anticorrosive, environmental sensibility is low etc., but the absorbing property of this foam compared with
Poor and mechanical property is also poor.Since the absorbing property and mechanical property of absorbing material are two more crucial ginsengs of engineering field
Number, therefore there is an urgent need for designing a kind of absorbing material that can be improved its absorbing property but also improve its mechanical property, to meet reality
Engineering demand.
Invention content
In view of this, in order to solve the problems in the prior art, the present invention provides a kind of suction wave foams, by volume basis
Than, including：50% polystyrene resin, 2.5%~10% graphene and 40%~47.5% liquid blowing agent.
In above-mentioned suction wave foam, polystyrene resin is granular polystyrene resin.
In above-mentioned suction wave foam, liquid blowing agent is the one or two of dichloromethane and chloromethanes.
In above-mentioned suction wave foam, polystyrene resin is 1 with the volume ratio of graphene and the mixed liquor of liquid blowing agent:
1。
The present invention also provides a kind of methods preparing above-mentioned suction wave foam, include the following steps：By polystyrene resin
It is sent into extruder fusing；The mixed liquor of liquid blowing agent and graphene is injected into the extruder；By extrusion screw rod rotates
It is uniformly mixed, die extrusion；And decompression vaporization obtains inhaling wave foam to extrudate foaming and intumescing.
In the above-mentioned methods, polystyrene resin is granular polystyrene resin.
In the above-mentioned methods, mixed liquor is injected to the fusing section of the extruder.
In the above-mentioned methods, mixed liquor is injected to the fusing section of extruder with high-pressure charging device.
In the above-mentioned methods, the temperature for melting section is 160~210 DEG C, is 0.5~1h in fusing section residence time.
In the above-mentioned methods, wave foam is inhaled through cold cut and cutting, obtains plastic foamboard.
The present invention is possessed using the graphene for possessing unique two-dimensional slice structure and excellent electricity and mechanical property
Stronger wide-band microwave absorbent properties have huge application prospect in terms of electromagnetic shielding, can absorb and be emitted to the material
The electromagnetic wave on surface, and large specific surface area have good dispersibility in the solution, can be provided during microporous foam
A large amount of nucleating points uniformly to become larger for air bubble growth, can optimize the structure of abscess.
Meanwhile liquid blowing agent dichloromethane and chloromethanes and graphene are used in combination, and further improve the foam
Mechanical property.Therefore, suction wave foam of the invention optimizes the structure of abscess and is carried under conditions of meeting absorbing property
Its high mechanical property.
The method of wave foam is inhaled in the preparation provided through the invention, has been obtained within the scope of specific fragment, absorbent properties are excellent
Good suction wave foam, and since graphene has good dispersibility, can be provided during microporous foam a large amount of uniform
The nucleating point to become larger for air bubble growth, optimize the structure of abscess.In addition, graphene and liquid blowing agent dichloroethylene and chlorine
The combined use of ethylene so that the tensile strength of the foam has reached 1.20MPa or more, elongation at break reached 133% with
On, improve the mechanical property of the suction wave foam.
Description of the drawings
Fig. 1 is the preparation flow schematic diagram for inhaling wave foam.
Specific implementation mode
The following examples can make those skilled in the art that the present invention be more fully understood, but not limit in any way
The present invention.
The present invention select percent by volume be 50% polystyrene resin, 2.5%~10% graphene and 40%~
47.5% liquid blowing agent, wherein polystyrene resin is granular polystyrene resin；Liquid blowing agent be dichloromethane and
The one or two of chloromethanes；Polystyrene resin is 1 with the volume ratio of graphene and the mixed liquor of liquid blowing agent:1.
By the way that polystyrene resin is sent into extruder fusing；Use high-pressure charging device by liquid blowing agent and graphene again
Mixed liquor injects the fusing section of extruder；Granular polystyrene resin is rotated with mixed liquor extrusion screw rod and is uniformly mixed, mouth
Mould squeezes out；And decompression vaporization obtains the excellent suction wave foam of absorbing property to extrudate foaming and intumescing；Wherein, section is melted
Temperature is 160~210 DEG C, and the residence time is 0.5~1h；Wave foam will be inhaled through cold cut and cutting, obtain plastic foamboard.
Extruder is single screw extrusion machine or double screw extruder.
Embodiment one
100 parts of granular polystyrene resins are sent into double screw extruders fusing, with high-pressure charging device by 5 parts of graphenes and
The fusing section of the mixed liquor injection extruder of 95 parts of dichloromethane, the temperature of the fusing section is 160 DEG C, 1h is melted, by polyphenyl second
Olefine resin is rotated with mixed liquor extrusion screw rod and is uniformly mixed, then by die extrusion.Foaming agent dichloromethane vapour under reduced pressure
Change, until extrudate foaming and intumescing, most afterwards through slow cold cut and cutting, you can obtain plastic foamboard, plank is cut into 300 millis
The standard testing reflectivity of * 300 millimeters * 5 millimeters of rice further measures abscess-size, cell density and mechanical property.
Embodiment two
100 parts of granular polystyrene resins are sent into single screw extrusion machines fusing, with high-pressure charging device by 10 parts of graphenes
The fusing section of extruder is injected with the mixed liquor of 90 parts of chloromethanes, the temperature of the fusing section is 180 DEG C, 1h is melted, by polyphenyl second
Olefine resin is rotated with mixed liquor extrusion screw rod and is uniformly mixed, then by die extrusion.Foaming agent chloromethanes vaporizes under reduced pressure,
To extrudate foaming and intumescing, most afterwards through slow cold cut and cutting, you can obtain plastic foamboard, plank is cut into 300 millimeters of *
300 millimeters * 20 millimeters of standard testing reflectivity further measures abscess-size, cell density and mechanical property.
Embodiment three
100 parts of granular polystyrene resins are sent into double screw extruders fusing, with high-pressure charging device by 15 parts of graphenes
The fusing section of extruder is injected with the mixed liquor of 85 parts of dichloromethane, the temperature of the fusing section is 200 DEG C, melts 0.5h, will gather
Styrene resin is rotated with mixed liquor extrusion screw rod and is uniformly mixed, then by die extrusion.Foaming agent dichloromethane is depressurizing
Lower vaporization, until extrudate foaming and intumescing, most afterwards through slow cold cut and cutting, you can obtain plastic foamboard, plank is cut into 300
The standard testing reflectivity of * 300 millimeters * 35 millimeters of millimeter further measures abscess-size, cell density and mechanical property.
Example IV
100 parts of granular polystyrene resins are sent into double screw extruders fusing, with high-pressure charging device by 20 parts of graphenes
The fusing section of extruder is injected with the mixed liquor of 80 parts of chloromethanes, the temperature of the fusing section is 210 DEG C, 0.6h is melted, by polyphenyl
Vinyl is rotated with mixed liquor extrusion screw rod and is uniformly mixed, then by die extrusion.Foaming agent chloromethanes vapour under reduced pressure
Change, until extrudate foaming and intumescing, most afterwards through slow cold cut and cutting, you can obtain plastic foamboard, plank is cut into 300 millis
The standard testing reflectivity of * 300 millimeters * 1 millimeter of rice further measures abscess-size, cell density and mechanical property.
Embodiment five
100 parts of granular polystyrene resins are sent into double screw extruders fusing, with high-pressure charging device by 18 parts of graphenes
The fusing section of extruder is injected with the mixed liquor of 82 parts of dichloromethane, the temperature of the fusing section is 170 DEG C, 1h is melted, by polyphenyl
Vinyl is rotated with mixed liquor extrusion screw rod and is uniformly mixed, then by die extrusion.Foaming agent dichloromethane is under reduced pressure
Vaporization, until extrudate foaming and intumescing, most afterwards through slow cold cut and cutting, you can obtain plastic foamboard, plank is cut into 300 millis
The standard testing reflectivity of * 300 millimeters * 40 millimeters of rice further measures abscess-size, cell density and mechanical property.
Embodiment six
100 parts of granular polystyrene resins are sent into single screw extrusion machines fusing, with high-pressure charging device by 6 parts of graphenes and
The fusing section of the mixed liquor injection extruder of 94 parts of dichloromethane, the temperature of the fusing section is 190 DEG C, 0.7h is melted, by polyphenyl
Vinyl is rotated with mixed liquor extrusion screw rod and is uniformly mixed, then by die extrusion.Foaming agent dichloromethane is under reduced pressure
Vaporization, until extrudate foaming and intumescing, most afterwards through slow cold cut and cutting, you can obtain plastic foamboard, plank is cut into 300 millis
The standard testing reflectivity of * 300 millimeters * 50 millimeters of rice further measures abscess-size, cell density and mechanical property.
Number in all of above embodiment is parts by volume, and reflectivity is all made of SFL-I Albedometers measurement.Bubble
Hole density is measured carrys out the density measure tool measurement that more assay balance balances are equipped with using plum Teller-support.Abscess-size can lead to
S-4700 type field emission scanning electron microscopes are crossed, then handle to obtain by Image-pro plus6.0 image processing softwares.
The reflectivity that embodiment one to six is tested, obtained reflection loss, abscess-size and cell density result such as following table
1。
Table 1, test result
| Test frequency | Reflection loss | Abscess-size | Cell density | |
| Embodiment one | 5-10GHz | -3dB | 12.75μm | 3.93×108cells/cm3 |
| Embodiment two | 6-12GHz | -6dB | 12.62μm | 3.96×108cells/cm3 |
| Embodiment three | 2-12GHz | -10dB | 12.73μm | 3.95×108cells/cm3 |
| Example IV | 2-12GHz | -9dB | 12.80μm | 3.89×108cells/cm3 |
| Embodiment five | 1-8GHz | -8dB | 12.69μm | 3.94×108cells/cm3 |
| Embodiment six | 1-8GHz | -8dB | 12.76μm | 3.87×108cells/cm3 |
By table 1 as it can be seen that the present invention obtains inhaling wave foam in 300 millimeters * 300 millimeters * 1 millimeter of specification, 1-12Ghz's
Reflection loss within the scope of absorption frequency is both less than -3dB, this is because low reason is lost in the reflection of electromagnetic wave of graphene, together
When due to the good dispersibility of graphene, the abscess-size of the purer polystyrene foam of size of abscess reduce it is very much, for bubble
For hole density, cell density integrally increases, therefore optimizes the structure for inhaling wave foam.
The tensile strength and elongation at break result such as the following table 2 that embodiment one to six is tested：
Table 2, test result
As can be seen from Table 2, the foam tensile strength has reached 1.20MPa or more after measured, elongation at break has reached 133%
More than, improve the mechanical property of the foam.Therefore, suction wave foaming properties of the invention are better than traditional suction wave foam.
It will be understood by those skilled in the art that above example is only exemplary embodiment, in the spirit without departing substantially from the present invention
In the case of range, a variety of variations can be carried out, replaced and changed.
Claims (10)
1. a kind of suction wave foam, which is characterized in that percent by volume is pressed, including：50% polystyrene resin, 2.5%~
10% graphene and 40%~47.5% liquid blowing agent.
2. according to the method described in claim 1, it is characterized in that, the polystyrene resin is granular polystyrene resin.
3. suction wave foam according to claim 1, which is characterized in that the liquid blowing agent is dichloromethane and chloromethanes
One or two.
4. suction wave foam according to claim 1, which is characterized in that the volume of the polystyrene resin and the graphite
The volume ratio of the mixed liquor of alkene and the liquid blowing agent is 1:1.
5. a kind of preparing the method any one of Claims 1-4 for inhaling wave foam, which is characterized in that including following step
Suddenly：
Polystyrene resin is sent into extruder fusing；
The mixed liquor of liquid blowing agent and graphene is injected into the extruder；
It is rotated and is uniformly mixed by extrusion screw rod, die extrusion；And
Decompression vaporization obtains inhaling wave foam to extrudate foaming and intumescing.
6. according to the method described in claim 5, it is characterized in that, the polystyrene resin is granular polystyrene resin.
7. according to the method described in claim 5, it is characterized in that, the mixed liquor to be injected to the fusing section of the extruder.
8. the method according to the description of claim 7 is characterized in that the mixed liquor is injected the extrusion with high-pressure charging device
The fusing section of machine.
9. according to the method described in claim 8, it is characterized in that, the temperature of the fusing section is 160~210 DEG C, described
Fusing section residence time is 0.5~1h.
10. according to the method described in claim 5, it is characterized in that, the suction wave foam obtains foam plastic through cold cut and cutting
Flitch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710172674.3A CN108623928A (en) | 2017-03-21 | 2017-03-21 | A kind of suction wave foam and preparation method thereof |
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| CN201710172674.3A CN108623928A (en) | 2017-03-21 | 2017-03-21 | A kind of suction wave foam and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115260735A (en) * | 2022-05-17 | 2022-11-01 | 南京航空航天大学 | Wave-absorbing thermoplastic elastomer foam material and preparation method thereof |
| CN115785565A (en) * | 2022-12-15 | 2023-03-14 | 南京大学 | Wave-absorbing heat-conducting gradient type microporous foam material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115260735A (en) * | 2022-05-17 | 2022-11-01 | 南京航空航天大学 | Wave-absorbing thermoplastic elastomer foam material and preparation method thereof |
| CN115260735B (en) * | 2022-05-17 | 2024-03-26 | 南京航空航天大学 | Wave-absorbing thermoplastic elastomer foam material and preparation method thereof |
| CN115785565A (en) * | 2022-12-15 | 2023-03-14 | 南京大学 | Wave-absorbing heat-conducting gradient type microporous foam material and preparation method thereof |
| CN115785565B (en) * | 2022-12-15 | 2023-06-13 | 南京大学 | Absorbing waveguide thermal gradient type microporous foam material and preparation method thereof |
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Application publication date: 20181009 |