CN114228295A - Fireproof material with alternating multilayer structure and preparation method thereof - Google Patents
Fireproof material with alternating multilayer structure and preparation method thereof Download PDFInfo
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- CN114228295A CN114228295A CN202210031203.1A CN202210031203A CN114228295A CN 114228295 A CN114228295 A CN 114228295A CN 202210031203 A CN202210031203 A CN 202210031203A CN 114228295 A CN114228295 A CN 114228295A
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- 239000000463 material Substances 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title description 10
- 238000007731 hot pressing Methods 0.000 claims abstract description 52
- 239000003063 flame retardant Substances 0.000 claims abstract description 51
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 43
- 229920000642 polymer Polymers 0.000 claims abstract description 29
- 239000000654 additive Substances 0.000 claims abstract description 17
- 230000000996 additive effect Effects 0.000 claims abstract description 13
- 239000002086 nanomaterial Substances 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 11
- -1 polypropylene Polymers 0.000 claims description 29
- 239000004743 Polypropylene Substances 0.000 claims description 18
- 229920001155 polypropylene Polymers 0.000 claims description 18
- 238000005303 weighing Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- 238000001125 extrusion Methods 0.000 claims description 12
- 239000004698 Polyethylene Substances 0.000 claims description 11
- 229920000573 polyethylene Polymers 0.000 claims description 11
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 10
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical group [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 8
- 229910052698 phosphorus Inorganic materials 0.000 claims description 8
- 239000011574 phosphorus Substances 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 7
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- CDOMXXVCZQOOMT-UHFFFAOYSA-N [phenoxy(phenyl)phosphoryl]oxybenzene Chemical compound C=1C=CC=CC=1OP(C=1C=CC=CC=1)(=O)OC1=CC=CC=C1 CDOMXXVCZQOOMT-UHFFFAOYSA-N 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 239000004114 Ammonium polyphosphate Substances 0.000 claims description 4
- 235000019826 ammonium polyphosphate Nutrition 0.000 claims description 4
- 229920001276 ammonium polyphosphate Polymers 0.000 claims description 4
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 239000011159 matrix material Substances 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 44
- 229910052901 montmorillonite Inorganic materials 0.000 description 14
- 239000002131 composite material Substances 0.000 description 11
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 11
- 238000005520 cutting process Methods 0.000 description 7
- 229920001911 maleic anhydride grafted polypropylene Polymers 0.000 description 4
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 229920001912 maleic anhydride grafted polyethylene Polymers 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000004079 fireproofing Methods 0.000 description 1
- 239000012802 nanoclay Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/38—Layered products comprising a layer of synthetic resin comprising epoxy resins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- 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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- 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
- C08J2351/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2351/06—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
-
- 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
- C08K3/34—Silicon-containing compounds
- C08K3/346—Clay
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- Chemical & Material Sciences (AREA)
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- Health & Medical Sciences (AREA)
- Fluid Mechanics (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention belongs to the technical field of fireproof materials, and provides a fireproof material with an alternative multilayer structure, which comprises at least two layers of same or different material thin layers, wherein at least one material thin layer is formed by hot pressing after mixing treatment of a high molecular polymer I and a nano additive or a flame retardant, and the other material thin layer is formed by hot pressing after mixing treatment of a high molecular polymer II, a high molecular polymer I and a nano additive or a high molecular polymer I and a flame retardant. According to the invention, two same or different material thin layers are alternately stacked, and the fireproof material with an alternate multilayer structure is prepared by hot pressing under the condition of reducing the content of the nano material and the flame retardant, so that the fireproof material has an excellent flame retardant effect, can retain a certain material performance, does not cause the problems of large surface and matrix performance deviation and the like, and can effectively solve the problems in the prior art.
Description
Technical Field
The invention belongs to the technical field of fireproof materials, and particularly relates to a fireproof material with an alternative multilayer structure and a preparation method thereof.
Background
The composite material with flame retardant effect can be prepared by adding the nano material or the flame retardant into the thermoplastic polymer. The nanometer material in the composite material has the flame retardant function through heat insulation, gas insulation and other modes, and the flame retardant is flame retardant through a chemical mode. However, if the addition amount of the nano material and the flame retardant in the composite material is low, a strong flame retardant effect is not achieved, and the mechanical property of the material and the properties of other materials are affected by the addition amount which is too high. New techniques are therefore needed to improve the properties of the materials.
Another flame retardant material has been developed to achieve flame retardancy by attaching a layer of flame retardant material to the surface of a polymer. Although it is possible to retain some of the properties of the material and reduce the amount of additives, this approach can result in large variations in properties between the surface layer and the substrate, and may also cause surface delamination from the substrate.
Disclosure of Invention
The invention aims to provide a fireproof material with an alternating multilayer structure and a preparation method thereof. The alternating multilayer fireproof material prepared by the invention has excellent flame retardant effect under the condition of reducing the total content of the nano material and the flame retardant, can retain certain material performance, does not cause the problems of large deviation of surface and matrix performance and the like, and can effectively solve the problems in the prior art.
The invention provides a fireproof material with an alternative multilayer structure, which comprises at least two layers of sheets made of same or different materials, wherein at least one layer of sheet is a sheet a formed by hot-pressing a high-molecular polymer I after being mixed with a nano additive or a flame retardant, the other layer of sheet is a sheet b formed by hot-pressing a high-molecular polymer II, a high-molecular polymer I and a nano additive or a high-molecular polymer I after being mixed with any one of the flame retardants, the mass percent of the nano additive is 1-30%, and the mass percent of the flame retardant is 1-30%.
Preferably, the first polymer is one of polypropylene grafted with maleic anhydride, polyethylene grafted with maleic anhydride and polyethylene oxide, and the second polymer is one of polypropylene, polyethylene and polyethylene oxide.
Preferably, the nano additive is an inorganic nano material.
Preferably, the inorganic nano material is nano montmorillonite or nano metal oxide.
Preferably, the flame retardant is a phosphorus flame retardant.
Preferably, the phosphorus flame retardant is ammonium polyphosphate or triphenyl phosphonate.
The invention also provides a preparation method of the fireproof material with the alternating multilayer structure, which comprises the following steps:
s1: melting, blending, extruding and granulating the high molecular polymer I and the nano additive or the flame retardant by a double-screw extruder, drying the material at 60 ℃ for 6-12h before extrusion, wherein the extrusion temperature is 180-200 ℃, the screw rotating speed is 20-30rpm/min, weighing particles, and performing hot-pressing treatment to obtain a sheet a with the thickness of 1mm multiplied by 20 cm;
s2: carrying out hot-pressing treatment on the high molecular polymer II, the high molecular polymer I and a nano additive or the high molecular polymer I and a flame retardant according to an S1 method to prepare a thin plate b with the same thickness or integral multiple of the thin plate a;
s3: alternately placing the two sheets a prepared in the step S1 and the two sheets b prepared in the step S2, and hot-pressing the two sheets a and b into four layers of alternate plates;
or, alternately placing the thin plate a prepared in the step S1 and the thin plate b prepared in the step S2 and having the thickness which is integral multiple of the thin plate a, and hot-pressing the thin plates into two layers of alternate plates;
s4: the alternate sheet obtained in S3 was cut into four equal parts, each hot-pressed to obtain thin sheets of 1 mm. times.20 cm in specification and alternately placed, and this operation was repeated to successively obtain 4n+1A multilayer alternating sheet of layers.
Preferably, in step S1, the first polymer is one of polypropylene grafted with maleic anhydride, polyethylene grafted with maleic anhydride, or polyethylene oxide, the second polymer is one of polypropylene, polyethylene, or polyethylene oxide, the nano-additive is an inorganic nano-material, and the flame retardant is a phosphorus flame retardant.
Preferably, the inorganic nano material is nano montmorillonite or nano metal oxide, and the phosphorus flame retardant is ammonium polyphosphate or triphenyl phosphonate.
Preferably, the hot pressing treatment is carried out under the conditions that the hot pressing temperature is 180 ℃, the melting is carried out for 5min under no pressure, then the pressure is increased to 5MPa, and the time is maintained for 5 min.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, two same or different material thin layers are alternately stacked, and under the condition of reducing the content of the nano material and the flame retardant, the fireproof material with an alternate multilayer structure is prepared by hot pressing, so that the fireproof material has an excellent flame retardant effect, can retain a certain material performance, can not cause the problems of large deviation of the surface and the matrix performance and the like, and can effectively solve the problems in the prior art.
Drawings
FIG. 1 is an electron microscope scanning image of the multilayer alternative fireproof material prepared in example 1 of the present invention;
FIG. 2 is a process flow diagram of the present invention for a multilayer alternating fire-blocking material;
FIG. 3 is a graph showing the flame retardancy of the multilayer alternative fireproofing material prepared in example 1.
Detailed Description
In order to understand the present invention, the following description will be given with reference to specific examples.
Example 1:
a preparation method of a fireproof material with an alternating multilayer structure comprises the following steps:
s1: weighing 900g of maleic anhydride grafted polypropylene and 100g of nano montmorillonite, preparing a 10% nano montmorillonite polypropylene composite material, drying for 12 hours at 60 ℃ in an oven, putting the dried material into a double-screw extruder, melting, blending, extruding and granulating, wherein the extrusion temperature is 180 ℃, the screw rotation speed is 20rpm/min, weighing 35g of particles, carrying out hot pressing treatment, the hot pressing temperature is 180 ℃, the pressure is 0MPa for 5min, the pressure is 5MPa for 5min, and carrying out hot pressing treatment to obtain a sheet a with the thickness of 1mm multiplied by 20 cm;
s2: weighing 35g of polypropylene, and performing hot pressing treatment according to a method S1 to obtain a thin plate b with the thickness of 1mm multiplied by 20 cm;
s3: alternately placing the two sheets a prepared in the step S1 and the two sheets b prepared in the step S2, and hot-pressing into four layers of alternate plates with the thickness of 4mm multiplied by 20cm, wherein the temperature of a hot press is 180 ℃, the pressure is 5MPa, and the time is maintained for 5 min;
s4: and (3) cutting the four-layer alternating plate prepared in the step (S3) into four parts in an intersecting and average mode, respectively carrying out hot pressing treatment on the four cut four-layer alternating plates to prepare thin plates with the specification of 1mm multiplied by 20cm, alternately superposing the thin plates, carrying out hot pressing to prepare 16 layers of alternating plates, and carrying out average cutting and hot pressing operation in sequence to prepare 64 layers of multilayer alternating plates with the thickness of each layer being 62.5 mu m.
Example 2:
a preparation method of a fireproof material with an alternating multilayer structure comprises the following steps:
s1: weighing 940g of maleic anhydride grafted polyethylene, 50g of nano montmorillonite and 10g of flame retardant, drying for 12 hours at 60 ℃ in an oven, putting the materials into a double-screw extruder for melt blending extrusion granulation, wherein the extrusion temperature is 200 ℃, the screw rotation speed is 30rpm/min, weighing 35g of particles, carrying out hot-pressing treatment at 180 ℃ and 5min under 0MPa for 5min, and maintaining the pressure at 5MPa for 5min to obtain a sheet a with the thickness of 1mm multiplied by 20 cm;
s2: weighing 35g of polyethylene, and performing hot pressing treatment according to a method S1 to obtain a thin plate b with the thickness of 1mm multiplied by 20 cm;
s3: alternately placing the two sheets a prepared in the step S1 and the two sheets b prepared in the step S2, and hot-pressing into four layers of alternate plates with the thickness of 4mm multiplied by 20cm, wherein the temperature of a hot press is 180 ℃, the pressure is 5MPa, and the time is maintained for 5 min;
s4: and (3) cutting the four-layer alternating plate prepared in the step (S3) into four parts in a crossed and average mode, respectively carrying out hot pressing treatment on the four cut four-layer alternating plates to prepare thin plates with the specification of 1mm multiplied by 20cm, alternately superposing the thin plates, carrying out hot pressing to prepare 16 layers of alternating plates, and carrying out the same operation twice to prepare 256 layers of multilayer alternating plates with the thickness of each layer being 15.6 mu m.
Example 3:
a preparation method of a fireproof material with an alternating multilayer structure comprises the following steps:
s1: weighing 950g of maleic anhydride grafted polyethylene and 50g of nano montmorillonite, drying for 12 hours at 60 ℃ in an oven, putting the materials into a double-screw extruder for melting, blending, extruding and granulating, wherein the extrusion temperature is 190 ℃, the screw rotation speed is 25rpm/min, weighing 35g of particles, carrying out hot pressing treatment at 180 ℃, the pressure is 0MPa for 5min, and the pressure is 5MPa for 5min, and carrying out hot pressing treatment to obtain a sheet a with the thickness of 1mm, 20cm and 20 cm;
s2: 990g of polyethylene and 10g of flame retardant are weighed, and a thin plate b with the thickness of 1mm multiplied by 20cm is prepared by hot pressing treatment according to the method S1;
s3: alternately superposing the two sheets a prepared in the step S1 and the two sheets b prepared in the step S2, and hot-pressing into four layers of alternate plates of 4mm multiplied by 20cm, wherein the temperature of a hot press is 180 ℃, the pressure is 5MPa, and the time is maintained for 5 min;
s4: and (3) cutting the four-layer alternating plate prepared in the step (S3) into four parts in a crossed and average mode, respectively carrying out hot pressing treatment on the four cut four-layer alternating plates to prepare thin plates with the specification of 1mm multiplied by 20cm, alternately superposing the thin plates, carrying out hot pressing to prepare 16 layers of alternating plates, and repeating the same operation for 3 times to prepare 1024 layers of alternating plates with the thickness of each layer being 3.9 microns.
Example 4:
a preparation method of a fireproof material with an alternating multilayer structure comprises the following steps:
s1: weighing 980g of maleic anhydride grafted polypropylene, 10g of triphenyl phosphonate and 10g of ZnO nanoparticles, drying for 12 hours at 60 ℃ in an oven, putting the materials into a double-screw extruder for melt blending extrusion granulation, wherein the extrusion temperature is 190 ℃, the screw rotation speed is 25rpm/min, weighing 35g of particles, carrying out hot-pressing treatment at 180 ℃ under 0MPa for 5min, maintaining the pressure at 5MPa for 5min, and carrying out hot-pressing treatment to obtain a sheet a with the thickness of 1mm multiplied by 20 cm;
s2: weighing 105g of polyethylene, and performing hot pressing treatment according to a method S1 to obtain a sheet b with the thickness of 3mm multiplied by 20 cm;
s3: superposing the thin plate a prepared in the step S1 and the thin plate b prepared in the step S2, and hot-pressing the superposed thin plates into two layers of alternate plates of 4mm multiplied by 20cm, wherein the temperature of a hot press is 180 ℃, the pressure is 5MPa, and the time is maintained for 5 min;
s4: and averagely cutting the two-layer alternating plate prepared in the step S3 into four parts, respectively carrying out hot pressing treatment on the four cut two-layer alternating plates to prepare thin plates with the specification of 1mm multiplied by 20cm, alternately superposing the thin plates, carrying out hot pressing to prepare 8 layers of alternating plates, and repeating the same operation for 2 times to prepare 128 layers of multilayer alternating plates, wherein the thickness of each layer of the thin plate a is 31.3 mu m, and the thickness of each layer of the thin plate b is 93.8 mu m.
Example 5:
a preparation method of a fireproof material with an alternating multilayer structure comprises the following steps:
s1: weighing 950g of polyethylene oxide and 50g of ZnO nanoparticles, drying in an oven at 60 ℃ for 12 hours, putting into a double-screw extruder for melt blending extrusion granulation, wherein the extrusion temperature is 180 ℃, the screw rotation speed is 25rpm/min, weighing 35g of particles for hot pressing treatment, the hot pressing temperature is 180 ℃, the pressure is 0MPa for 5min, the pressure is 5MPa for 5min, and the hot pressing treatment is carried out to obtain a sheet a with the thickness of 1mm multiplied by 20 cm;
s2: weighing 35g of polyethylene oxide, and performing hot pressing treatment according to a method S1 to obtain a thin plate b with the thickness of 1mm multiplied by 20 cm;
s3: alternately placing the two sheets a prepared in the step S1 and the two sheets b prepared in the step S2, and hot-pressing into four layers of alternate plates with the thickness of 4mm multiplied by 20cm, wherein the temperature of a hot press is 180 ℃, the pressure is 5MPa, and the time is maintained for 5 min;
s4: and (3) cutting the four-layer alternating plate prepared in the step (S3) into four parts in an intersecting and average mode, respectively carrying out hot pressing treatment on the four cut four-layer alternating plates to prepare thin plates with the specification of 1mm multiplied by 20cm, alternately superposing the thin plates, carrying out hot pressing to prepare 16 layers of alternating plates, and carrying out average cutting and hot pressing operation in sequence to prepare 256 layers of multilayer alternating plates with the thickness of each layer being 15.6 mu m.
Example 6
According to the national standard GB/T16172-2007 test method for heat release rate of building materials, peak heat release values of the maleic anhydride grafted polypropylene, the 5% nano montmorillonite polypropylene composite material, the 10% nano montmorillonite polypropylene composite material and the 64-layer alternating plate prepared in example 1 are respectively detected, and the result is shown in FIG. 3.
FIG. 1 is an electron microscope scanning image of the multilayer alternating fire-resistant material prepared in example 1, wherein a 64-layer alternating plate structure can be seen, wherein the lighter color rough part is a nano clay composite layer and the darker color part is a polypropylene layer.
Fig. 3 is a graph for detecting the flame retardant property of the multilayer alternative fireproof material prepared in example 1, wherein the smaller the peak heat release value is, the better the flame retardant property is, the higher the nano-montmorillonite content is, the better the flame retardant property is, and the flame retardant property of the 10% nano-montmorillonite polypropylene composite material is better than that of the 5% nano-montmorillonite polypropylene composite material; the content of the nano montmorillonite polypropylene in the 64-layer alternating plate prepared by adopting the 10% nano montmorillonite polypropylene composite material is 5%, but the peak heat release values are all lower than the peak heat release values of the 5% nano montmorillonite polypropylene composite material and the maleic anhydride grafted polypropylene, and the flame retardant property of the alternating plate is obviously improved.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The fireproof material with the alternating multilayer structure is characterized by comprising at least two layers of thin plates made of the same or different materials, wherein at least one layer of thin plate is a thin plate a formed by hot-pressing a high-molecular polymer I after mixing treatment with a nano additive or a flame retardant, the other layer of thin plate is a thin plate b formed by hot-pressing any one of a high-molecular polymer II, a high-molecular polymer I and a nano additive or a high-molecular polymer I and a flame retardant after mixing treatment, the mass percent of the nano additive is 1-30%, and the mass percent of the flame retardant is 1-30%.
2. The fire-retardant material of claim 1, wherein the first polymer is one of polypropylene grafted with maleic anhydride, polyethylene grafted with maleic anhydride and polyethylene oxide, and the second polymer is one of polypropylene, polyethylene and polyethylene oxide.
3. The fire-retardant material of claim 1, wherein said nano-additive is an inorganic nano-material.
4. The fire-retardant material of claim 3, wherein the inorganic nanomaterial is a nanomontopole or a nanometal oxide.
5. The fire-retardant material of claim 1, wherein said fire retardant is a phosphorus-based fire retardant.
6. The fire-retardant material with an alternating multilayer structure according to claim 5, wherein the phosphorus-based flame retardant is ammonium polyphosphate or triphenyl phosphonate.
7. A method for preparing a fire-retardant material of an alternating multilayer structure according to any one of claims 1 to 6, characterized in that it comprises the following steps:
s1: melting, blending, extruding and granulating the high molecular polymer I and the nano additive or the flame retardant by a double-screw extruder, drying the material at 60 ℃ for 6-12h before extrusion, wherein the extrusion temperature is 180-200 ℃, the screw rotating speed is 20-30rpm/min, weighing particles, and performing hot-pressing treatment to obtain a sheet a with the thickness of 1mm multiplied by 20 cm;
s2: carrying out hot-pressing treatment on the high molecular polymer II, the high molecular polymer I and a nano additive or the high molecular polymer I and a flame retardant according to an S1 method to prepare a thin plate b with the same thickness or integral multiple of the thin plate a;
s3: alternately placing the two sheets a prepared in the step S1 and the two sheets b prepared in the step S2, and hot-pressing the two sheets a and b into four layers of alternate plates;
or, alternately placing the thin plate a prepared in the step S1 and the thin plate b prepared in the step S2 and having the thickness which is integral multiple of the thin plate a, and hot-pressing the thin plates into two layers of alternate plates;
s4: the alternate sheet obtained in S3 was cut into four equal parts, each hot-pressed to obtain thin sheets of 1 mm. times.20 cm in specification and alternately placed, and this operation was repeated to successively obtain 4n+1A multilayer alternating sheet of layers.
8. The method according to claim 7, wherein in step S1, the first polymer is one of polypropylene, polyethylene or polyethylene oxide grafted with maleic anhydride, the second polymer is one of polypropylene, polyethylene or polyethylene oxide, the nano-additive is an inorganic nano-material, and the flame retardant is a phosphorus flame retardant.
9. The method according to claim 8, wherein the inorganic nanomaterial is nanomontmorine or a metal oxide, and the phosphorus flame retardant is ammonium polyphosphate or triphenyl phosphonate.
10. The method of claim 7, wherein the hot pressing is performed at 180 ℃ without pressure for 5min, and then the pressure is increased to 5MPa for 5 min.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117549584A (en) * | 2023-12-25 | 2024-02-13 | 武汉理工大学三亚科教创新园 | Preparation method of polymer-based wave-absorbing material |
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| JP2008023779A (en) * | 2006-07-19 | 2008-02-07 | Mitsubishi Gas Chem Co Inc | Multilayer structure |
| EP2857194A1 (en) * | 2013-10-03 | 2015-04-08 | Ondaplast S.p.a. | Multiwall sheets |
| US20160333173A1 (en) * | 2014-01-03 | 2016-11-17 | Arkema France | Thermoplastic composition made of polypropylene and polyamide-grafted polyolefin |
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| JP2008023779A (en) * | 2006-07-19 | 2008-02-07 | Mitsubishi Gas Chem Co Inc | Multilayer structure |
| EP2857194A1 (en) * | 2013-10-03 | 2015-04-08 | Ondaplast S.p.a. | Multiwall sheets |
| US20160333173A1 (en) * | 2014-01-03 | 2016-11-17 | Arkema France | Thermoplastic composition made of polypropylene and polyamide-grafted polyolefin |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117549584A (en) * | 2023-12-25 | 2024-02-13 | 武汉理工大学三亚科教创新园 | Preparation method of polymer-based wave-absorbing material |
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