CN106987050A - It is a kind of for PP composite material of supercritical carbon dioxide foaming and preparation method thereof - Google Patents
It is a kind of for PP composite material of supercritical carbon dioxide foaming and preparation method thereof Download PDFInfo
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- CN106987050A CN106987050A CN201710163778.8A CN201710163778A CN106987050A CN 106987050 A CN106987050 A CN 106987050A CN 201710163778 A CN201710163778 A CN 201710163778A CN 106987050 A CN106987050 A CN 106987050A
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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
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
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- 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
- C08J9/122—Hydrogen, oxygen, CO2, nitrogen or noble gases
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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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
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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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
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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
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
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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
- C08K9/00—Use of pretreated ingredients
- C08K9/10—Encapsulated ingredients
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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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Abstract
The invention discloses a kind of PP composite material for supercritical carbon dioxide foaming, including 80 90 parts of polypropylene, 1 10 parts of mesoporous nucleator and 1 10 parts of nucleator of collaboration.The invention also discloses its preparation method.The present invention is polyacrylic heterogeneous nucleation agent by using the specific pore passage structure of mesoporous silicon oxide, utilize its pore passage structure and high-specific surface area, by being modified in mesoporous silicon oxide duct and the close polypropylene of silicane coupling agent surface grafted realization, by realizing out-phase foaming agent after mesoporous silicon oxide surface enrichment initiator azo-bis-isobutyl cyanide, the modification of CuBr catalyst；Mesoporous silicon oxide can reduce nucleation energy barrier, effectively improve heterogeneous nucleation efficiency as polypropylene foaming agent, pore passage structure and polymer formation " air pocket " structure.The use of nucleator is cooperateed with, the expansion density and efficiency of general purpose polypropylene expanded material is also further increased.
Description
Technical field
The invention belongs to organic polymer field of nanocomposite materials, it is used for supercritical carbon dioxide more particularly, to one kind
PP composite material of foaming and preparation method thereof.
Background technology
The consumption of global energy is more and more, greenhouse effects, and the environmental problem such as atmosphere pollution became severe in recent years, and this is just
So that material processing, material manufacture industry will should make high performance material in the production process of material, ring is considered as far as possible again
Low-carbon is protected, or recycles nontoxic material.Automotive material can make the weight of automobile if using light-weight high-strength material
Mitigate 10%, and then fuel consumption 8-9% can be reduced, exhaust emissions can also reduce by 10% or so.Polymer and polymer are multiple
Condensation material by the advantages such as its quality is small, specific strength big, low processing cost be widely used in Aero-Space, electronic information,
The fields such as biological medicine.Therefore, Study Polymer Melts material, can improve the technical merit of plastics industry, and will produce obvious
Economic and social benefit.
As people are to the growth of light-weight high-strength material demand and the raising of performance requirement, the mechanical property of material is kept
Meanwhile, the weight of material is constantly declining.Polymer is mainly prepared into porous structure material by lightweight polymeric materials, but together
When can also make the deterioration in physical properties of material.In phase early 1980s, the Suh of Massachusetts Institute Technology et al. research hairs
It is existing, the smaller space of a large amount of already present defect yardsticks more former than polymer is introduced in polymeric matrix, can be in reduction product weight
Its rigidity is improved while amount, and the influence to strength character is smaller.They think to exist in polymer base material micron-sized
Abscess, should have the same enhancement effect of micron order additive, and later research confirms the correctness of the imagination, also begun to
The development of the overcritical microcellular foam material of polymer.
Domestic and international prior art is in overcritical microcellular foam material preparation process, and addition inorganic nano-particle is used as out-phase
Nucleator is to reduce abscess-size, improve cell density, improve the important method of material microcellular structure and performance.At present, state
Inside and outside mechanism develops numerous heterogeneous nucleation agent materials, including micro inorganic fillers, such as mica, calcium carbonate etc.,
Including some nano-particles, such as clay, CNT, graphene.Research shows that traditional heterogeneous nucleation agent is used for general poly-
Supercritical carbon dioxide PP foam material its abscess prepared by propylene material is often larger, size is unstable；And
After carbon dioxide pressure release, easily there is supersaturated system hypersaturated state and causes abscess destruction in abscess, so as to greatly reduce
The intensity of PP foam material, influences it to use.Therefore, a kind of supercritical carbon dioxide microporous foam is developed with general to be gathered
Acrylic composite is particularly important, with good market prospects and social benefit.
The content of the invention
In order to overcome the deficiencies in the prior art, the present invention provides a kind of high bubbling efficiency, abscess-size stabilization, cell density
High, foaming material performance well for PP composite material of supercritical carbon dioxide foaming and preparation method thereof.
The technical solution adopted for the present invention to solve the technical problems is：A kind of gathering for supercritical carbon dioxide foaming
Acrylic composite, including 80-90 parts of polypropylene, mesoporous nucleator 1-10 parts and collaboration 1-10 parts of nucleator, it is described it is mesoporous into
Core agent is used as main component by mesoporous silicon oxide, initiator azo-bis-isobutyl cyanide, silane coupler and cuprous bromide catalyst
It is prepared from, the collaboration nucleator is prepared from by nano-calcium carbonate, maleic anhydride and polypropylene as main component.
The present invention is polyacrylic heterogeneous nucleation agent by using the specific pore passage structure of mesoporous silicon oxide, utilizes its duct
Structure and high-specific surface area, by being modified in mesoporous silicon oxide duct and the close polypropylene of silicane coupling agent surface grafted realization,
By realizing out-phase foaming agent after mesoporous silicon oxide surface enrichment initiator azo-bis-isobutyl cyanide, the modification of CuBr catalyst.
Further, the preparation method of mesoporous nucleator comprises the following steps：
1) using mesoporous silicon oxide, silane coupler, as the toluene of solvent using mass ratio as 5-15：1：30-50 ratio
Example blended under agitation, is heated to 130 DEG C of refluxing toluene reaction 3-6h；
2) by step 1) in obtained reactant remove mesoporous silicon oxide modified product obtained after toluene and impurity, and will
It obtains powder in 70-90 DEG C of vacuum drying 2-4h；
3) by step 2) in obtain powder, initiator azo-bis-isobutyl cyanide, cuprous bromide catalyst, deionized water is with matter
Amount is than being 2-8:1:1:20-45 ratio blended under agitation 25-40min, blend produces meso-porous titanium dioxide through 300 DEG C of sintering 2h
Silicon nucleator.
Further, above-mentioned steps 1) intermediary hole silica, silane coupler, toluene mass ratio be 10：1：40.
Further, above-mentioned steps 3) in powder, azo-bis-isobutyl cyanide, cuprous bromide, deionized water mass ratio be 5:
1:1:30。
Mesoporous nucleator prepared by the present invention, mesoporous silicon oxide is used as polypropylene foaming agent, pore passage structure and polymer
" air pocket " structure is formed, nucleation energy barrier can be reduced, heterogeneous nucleation efficiency is effectively improved, mesoporous silicon oxide pore passage structure can be realized
The enrichment of supercritical carbon dioxide, improves CO2Solubility in the composite, the mesoporous grain after silane coupler graft modification
Son can be evenly dispersed in polymeric matrix, good heterogeneous nucleating effect is shown during microporous foam, significantly
Abscess-size is reduced, cell density is improved, while the bulk density of expanded material is also slightly reduced.
Further, the preparation method of collaboration nucleator comprises the following steps：
1) by nano-calcium carbonate, maleic anhydride, water using mass ratio as 10-30:1：230-280 ratio blending, is quickly stirred
Mix, in the CO that flowing velocity is 8-15L/min2Stirring reaction 1-2h in atmosphere, fully dry the white powder of reactant；
2) by step 1) in obtained white powder and polypropylene with 1-5:1 mass ratio is placed in rotating speed for 2000-
3-8min is stirred in 3000r/min homogenizer, stirring product is through 160-180 DEG C of single screw extrusion machine extruding pelletization
Nucleator must be cooperateed with.
Further, the silane coupler is KH570.
Further, the mesoporous silicon oxide is that aperture is the mesoporous dioxy that 10-100nm, particle diameter are 500nm-10um
Silicon nitride material.
The collaboration nucleator prepared by the present invention, nano-calcium carbonate passes through common by melting with maleic anhydride, polypropylene
Mixed, the maleic anhydride functional groups in nano-calcium carbonate grafting, while also coating a floor height molecular film on nano-calcium carbonate surface, make
Nano-calcium carbonate and polypropylene possess good compatibility, and play a part of with mesoporous nucleator cooperateing with foaming.
The invention also discloses a kind of preparation method of the PP composite material for supercritical carbon dioxide foaming, bag
Include following steps：
1) raw material is mixed：Successively by 80-90 parts of polypropylene, 1-10 parts of mesoporous nucleator, 1-10 parts of collaboration nucleation
Agent is inserted and mixing treatment is carried out in mixer, stirring to standing cooling after 55 DEG C；
2) melt blending：By step 1) in obtained product be put into melt blending in single screw extrusion machine and extrude, melting temperature
Spend for 166-174 DEG C；
3) shape：By step 2) in the extruded machine head of obtained mixture pull out, cooling, drying, produce after pelletizing.
The beneficial effects of the invention are as follows：1) PP composite material prepared can apply to supercritical carbon dioxide foaming,
The cell size that is foamed is homogeneous, expansion density is big, bubbling efficiency is high；2) cost of raw material is cheap, and preparation principle is simple, material
Prepare and foaming process environmental protection, pollution-free；3) it is used for the preparation of the PP composite material of supercritical carbon dioxide foaming
Method is widely applicable, for the PP foam material mechanical strength prepared by supercritical carbon dioxide foaming to be big, application prospect
It is wide.
Brief description of the drawings
Fig. 1 is embodiments of the invention 1-3 and 1 foaming scanning electron microscope (SEM) photograph is implemented in contrast and cell size distribution is analyzed
Figure.
Embodiment
In order that those skilled in the art are better understood from the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, clear, complete description is carried out to the technical scheme in inventive embodiments, it is clear that described embodiment is only this
A part of embodiment of invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, should all belong to the scope of protection of the invention.
Embodiment 1
A kind of PP composite material for supercritical carbon dioxide foaming, is made up of by weight following component：It is poly-
Propylene is 80%, mesoporous nucleator 10% (aperture is that 10-20nm, particle diameter are 500nm-1um), cooperates with nucleator 10%.
First, mesoporous nucleator is prepared according to the following steps：Step 1) by mesoporous silicon oxide, silane coupler KH570, molten
Agent toluene is using mass ratio as 10:1：40 ratio blended under agitation, is heated to 130 DEG C of refluxing toluene reaction 5h；Step 2) will reaction
Product retains mesoporous silicon oxide modified powder, by powder through 80 DEG C of vacuum drying ovens after filtering off except solvent toluene and impurity
Dry 3h；Step 3) by obtained powder, initiator azo-bis-isobutyl cyanide, CuBr catalyst, deionized water with mass ratio 5:1:
1:30 ratio blended under agitation 30min, blend sinters 2h through 300 DEG C of Muffle furnaces, produces mesoporous silicon oxide nucleator.
Secondly, collaboration nucleator is prepared according to the following steps：Step 1) by nano-calcium carbonate, maleic anhydride, water with mass ratio
For 20:1：250 ratio blending, quick stirring, in CO2Stirring reaction 1.5h in (10L/min) atmosphere, reactant is fully dried
Obtain white powder；Step 2) by white powder and polypropylene with 3:1 ratio is placed in the homogenizer that rotating speed is 2000r/min
Middle stirring 3-8min, stirring thing produces collaboration nucleator through 160 DEG C of single screw extrusion machine extruding pelletization.
Finally, the PP composite material prepared with step for supercritical carbon dioxide foaming is pressed：Successively by 80%
Polypropylene, 10% mesoporous nucleator, 10% collaboration nucleator is put into homogenizer and carries out mixing treatment, stirring to 55
℃；Then mixture is stood, cooled down, be put into melt blending in single screw extrusion machine and extrude, wherein melting temperature is 166 DEG C,
The extruded machine head of mixture, which is pulled out, cooled down, drying up, pelletizing produces the present invention is used for the polypropylene of supercritical carbon dioxide foaming
Composite (a).
Embodiment 2
A kind of PP composite material for supercritical carbon dioxide foaming, is made up of by weight following component：It is poly-
Propylene is 90%, mesoporous nucleator 5% (aperture is that 30-50nm, particle diameter are 1um-5um), cooperates with nucleator 5%.
First, mesoporous nucleator is prepared according to the following steps：Step 1) by mesoporous silicon oxide, silane coupler KH570, molten
Agent toluene is using mass ratio as 15:1：45 ratio blended under agitation, is heated to 130 DEG C of refluxing toluene reaction 6h；Step 2) will reaction
Product retains mesoporous silicon oxide modified powder, by powder through 90 DEG C of vacuum drying ovens after filtering off except solvent toluene and impurity
Dry 4h；Step 3) by obtained powder, initiator azo-bis-isobutyl cyanide, CuBr catalyst, deionized water with mass ratio 6:1:
1:35 ratio blended under agitation 30min, blend sinters 2h through 300 DEG C of Muffle furnaces, produces mesoporous silicon oxide nucleator.
Secondly, collaboration nucleator is prepared according to the following steps：Step 1) by nano-calcium carbonate, maleic anhydride, water with mass ratio
For 30:1:260 ratio blending, quick stirring, in CO2Stirring reaction 2h in (15L/min) atmosphere, reactant is fully dry
White powder；Step 2) by white powder and polypropylene with 4:1 ratio is placed in the homogenizer that rotating speed is 2500r/min
3-8min is stirred, stirring thing produces collaboration nucleator through 170 DEG C of single screw extrusion machine extruding pelletization.
Finally, the PP composite material prepared with step for supercritical carbon dioxide foaming is pressed：Successively by 90%
Polypropylene, 5% mesoporous nucleator, 5% collaboration nucleator is put into homogenizer and carries out mixing treatment, stirring to 55
℃；Then mixture is stood, cooled down, be put into melt blending in single screw extrusion machine and extrude, wherein melting temperature is 170 DEG C,
The extruded machine head of mixture, which is pulled out, cooled down, drying up, pelletizing produces the present invention is used for the polypropylene of supercritical carbon dioxide foaming
Composite (b).
Embodiment 3
A kind of PP composite material for supercritical carbon dioxide foaming, is made up of by weight following component：It is poly-
Propylene is 85%, mesoporous nucleator 7% (aperture is that 50-100nm, particle diameter are 5um-10um), cooperates with nucleator 8%.
First, mesoporous nucleator is prepared according to the following steps：Step 1) by mesoporous silicon oxide, silane coupler KH570, molten
Agent toluene is using mass ratio as 14:1:50 ratio blended under agitation, is heated to 130 DEG C of refluxing toluene reaction 5h；Step 2) will reaction
Product retains mesoporous silicon oxide modified powder, by powder through 70 DEG C of vacuum drying ovens after filtering off except solvent toluene and impurity
Dry 2h；Step 3) by obtained powder, initiator azo-bis-isobutyl cyanide, CuBr catalyst, deionized water with mass ratio 7:1:
1:25 ratio blended under agitation 30min, blend sinters 2h through 300 DEG C of Muffle furnaces, produces mesoporous silicon oxide nucleator.
Secondly, collaboration nucleator is prepared according to the following steps：Step 1) by nano-calcium carbonate, maleic anhydride, water with mass ratio
For 28:1:245 ratio blending, quick stirring, in CO2Stirring reaction 2h in (10L/min) atmosphere, reactant is fully dry
White powder；Step 2) by white powder and polypropylene with 4:1 ratio is placed in the homogenizer that rotating speed is 3000r/min
3-8min is stirred, stirring thing produces collaboration nucleator through 180 DEG C of single screw extrusion machine extruding pelletization.
Finally, the PP composite material prepared with step for supercritical carbon dioxide foaming is pressed：Successively by 85%
Polypropylene, 7% mesoporous nucleator, 8% collaboration nucleator is put into homogenizer and carries out mixing treatment, stirring to 55
℃；Then mixture is stood, cooled down, be put into melt blending in single screw extrusion machine and extrude, wherein melting temperature is 174 DEG C,
The extruded machine head of mixture, which is pulled out, cooled down, drying up, pelletizing produces the present invention is used for the polypropylene of supercritical carbon dioxide foaming
Composite (c).
Comparative example 1
General purpose polypropylene composite, is made up of the raw material of following weight parts：Polypropylene is 88%, (the grain of silica 6%
Footpath is 1um-10um), cooperate with nucleator 6%.
Collaboration nucleator is prepared according to the following steps：Step 1) by nano-calcium carbonate, maleic anhydride, water using mass ratio as 20:
1：250 ratio blending, quick stirring, in CO2Stirring reaction 1.5h in (10L/min) atmosphere, reactant is fully dry in vain
Color powder；Step 2) by white powder and polypropylene with 3:1 ratio is placed in the homogenizer that rotating speed is 2000r/min and stirred
3-8min is mixed, stirring thing produces collaboration nucleator through 160 DEG C of single screw extrusion machine extruding pelletization.
Press and general purpose polypropylene composite is prepared with step：Successively by 88% polypropylene, 6% silica, 6%
Collaboration nucleator be put into homogenizer carry out mixing treatment, stir to 55 DEG C；Then mixture is stood, cooled down, is put into
Melt blending is extruded in single screw extrusion machine, and wherein melting temperature is 166 DEG C, and the extruded machine head of mixture is pulled out, cools down, blown
Dry, pelletizing, which produces the present invention, is used for the PP composite material (d) of supercritical carbon dioxide foaming.
The PP composite material that aforementioned four embodiment is obtained, the pelletizing after fully drying, adheres to homemade load
On thing platform, special metallic cavity rear enclosed system is put into together；Cavity soaks overcritical under 130 DEG C of temperature, 5MPa pressure
CO2Fluid 12h, afterwards quick pressure releasing, be put into ice-water bath and cool down 20min and obtain foamed sample, immersion foaming as a comparison, in detail
Thin performance is shown in Table 1 and Fig. 1.
Test data is contrasted in each embodiment of table 1
The cell density compared to contrast implementation 1 in implementing 1-3 data is can be seen that from the data of table 1 and Fig. 1 image
Be significantly improved (more than 2 times), and Average Cell size is significantly improved and (diminished) and abscess-size stability more preferably (embodiment
Between 1-3 abscess in size ± 1.80 μm, and between the abscess of comparative example 1 size for ± 5.08)；And expanded material average bubble
Hole is smaller, abscess-size stability is higher, cell density is bigger, then foaming material performance more preferably, is more beneficial to expanded material
Promote the use of.This also illustrate mesoporous silicon oxide compared to general silica as foaming heterogeneous nucleation agent, by using changing
Property mesoporous silicon oxide specific pore passage structure be polyacrylic heterogeneous nucleation agent, the PP foam material items hair for preparation
Steep performance advantage more preferably obvious.
Above-mentioned embodiment is used for illustrating the present invention, rather than limits the invention, the present invention's
In spirit and scope of the claims, any modifications and changes made to the present invention both fall within the protection model of the present invention
Enclose.
Claims (8)
1. a kind of PP composite material for supercritical carbon dioxide foaming, it is characterised in that：Including polypropylene 80-90
Part, mesoporous nucleator 1-10 parts and 1-10 parts of nucleator of collaboration, the mesoporous nucleator is by mesoporous silicon oxide, initiator azo
Two isobutyl cyanogen, silane coupler and cuprous bromide catalyst are prepared from as main component, and the collaboration nucleator is by nanometer
Calcium carbonate, maleic anhydride and polypropylene are prepared from as main component.
2. the PP composite material according to claim 1 for supercritical carbon dioxide foaming, it is characterised in that institute
The preparation method for giving an account of hole nucleator comprises the following steps：
1) using mesoporous silicon oxide, silane coupler, as the toluene of solvent using mass ratio as 5-15:1:30-50 ratio is stirred
Blending is mixed, 130 DEG C of refluxing toluene reaction 3-6h are heated to；
2) by step 1) in obtained reactant remove mesoporous silicon oxide modified product obtained after toluene and impurity, and by its
70-90 DEG C of vacuum drying 2-4h, obtains powder；
3) by step 2) in obtain powder, initiator azo-bis-isobutyl cyanide, cuprous bromide catalyst, deionized water is with mass ratio
For 2-8:1:1:20-45 ratio blended under agitation 25-40min, blend through 300 DEG C sintering 2h, produce mesoporous silicon oxide into
Core agent.
3. the PP composite material according to claim 2 for supercritical carbon dioxide foaming, it is characterised in that：Institute
State step 1) intermediary hole silica, silane coupler, toluene mass ratio be 10:1:40.
4. the PP composite material according to claim 2 for supercritical carbon dioxide foaming, it is characterised in that：Institute
State step 3) in powder, azo-bis-isobutyl cyanide, cuprous bromide, deionized water mass ratio be 5:1:1:30.
5. the PP composite material according to claim 1 for supercritical carbon dioxide foaming, it is characterised in that institute
The preparation method for stating collaboration nucleator comprises the following steps：
1) by nano-calcium carbonate, maleic anhydride, water using mass ratio as 10-30:1:230-280 ratio blending, quick stirring,
Flowing velocity is 8-15L/min CO2Stirring reaction 1-2h in atmosphere, fully dry the white powder of reactant；
2) by step 1) in obtained white powder and polypropylene with 1-5:1 mass ratio is placed in rotating speed for 2000-3000r/min
Homogenizer in stir 3-8min, stirring product is produced through 160-180 DEG C of single screw extrusion machine extruding pelletization to be cooperateed with into
Core agent.
6. the PP composite material according to claim 1 for supercritical carbon dioxide foaming, it is characterised in that：Institute
Silane coupler is stated for KH570.
7. the PP composite material according to claim 1 for supercritical carbon dioxide foaming, it is characterised in that：Institute
It is that aperture is the Metaporous silicon dioxide material that 10-100nm, particle diameter are 500nm-10um to state mesoporous silicon oxide.
8. the preparation method of a kind of PP composite material for supercritical carbon dioxide foaming, it is characterised in that including following
Step：
1) raw material is mixed：80-90 parts of polypropylene, 1-10 parts of mesoporous nucleator, 1-10 parts of collaboration nucleator are put successively
Enter and mixing treatment is carried out in mixer, stirring to standing cooling after 55 DEG C；
2) melt blending：By step 1) in obtained product be put into melt blending in single screw extrusion machine and extrude, melting temperature is
166-174℃；
3) shape：By step 2) in the extruded machine head of obtained mixture pull out, cooling, drying, produce after pelletizing.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110007383A (en) * | 2019-04-15 | 2019-07-12 | 合肥京东方显示技术有限公司 | Display device, backlight module, reflector plate and its manufacturing method |
| CN110563994A (en) * | 2019-10-08 | 2019-12-13 | 浙江杰上杰新材料有限公司 | Supercritical foaming nucleating agent and preparation method thereof |
| CN115806692A (en) * | 2022-12-01 | 2023-03-17 | 中化学华陆新材料有限公司 | Elastic silica aerogel modified polypropylene microporous foam material and preparation method thereof |
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| CN102911325A (en) * | 2012-09-29 | 2013-02-06 | 浙江工业大学 | Supercritical carbon dioxide (CO2) foaming nucleating agent and preparation method thereof |
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| CN110007383A (en) * | 2019-04-15 | 2019-07-12 | 合肥京东方显示技术有限公司 | Display device, backlight module, reflector plate and its manufacturing method |
| CN110563994A (en) * | 2019-10-08 | 2019-12-13 | 浙江杰上杰新材料有限公司 | Supercritical foaming nucleating agent and preparation method thereof |
| CN110563994B (en) * | 2019-10-08 | 2022-05-24 | 浙江杰上杰新材料有限公司 | Supercritical foaming nucleating agent and preparation method thereof |
| CN115806692A (en) * | 2022-12-01 | 2023-03-17 | 中化学华陆新材料有限公司 | Elastic silica aerogel modified polypropylene microporous foam material and preparation method thereof |
| CN115806692B (en) * | 2022-12-01 | 2024-01-26 | 中化学华陆新材料有限公司 | Elastic silica aerogel modified polypropylene microporous foaming material and preparation method thereof |
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