CN101942137B - Method for preparing conductivity-enhanced polymer/carbon nano tube composite material by vibration injection molding device - Google Patents
Method for preparing conductivity-enhanced polymer/carbon nano tube composite material by vibration injection molding device Download PDFInfo
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- CN101942137B CN101942137B CN2010102837370A CN201010283737A CN101942137B CN 101942137 B CN101942137 B CN 101942137B CN 2010102837370 A CN2010102837370 A CN 2010102837370A CN 201010283737 A CN201010283737 A CN 201010283737A CN 101942137 B CN101942137 B CN 101942137B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92885—Screw or gear
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
Abstract
The invention discloses a method for preparing a conductivity-enhanced polymer/carbon nano tube composite material by a vibration injection molding device. The method is characterized by comprising the following steps of: 1, adding 1 to 10 weight parts of carbon nano tube and 90 to 99 weight parts of polymer into a screw extruder for melting, mixing, extruding and pelleting, wherein the temperature of the extruder is between 165 and 225 DEG C and the rotating speed of the screw is 90 to 120 revolutions per minute; 2, putting mixed granules into a drying oven at the temperature of between 50 and 80 DEG C for 6 to 10 hours, adding the granules into a plastification system of the vibration device for melting and plasticizing, injecting the granules into a vibration cavity and keeping the temperature for 5 to 10 minutes; and 3, starting the vibration device, and making the polymer melt injected into a melting cavity of a mold for molding through a nozzle under the vibration pressure of 35 to 80 MPa and at the vibration frequency of 0 to 1.2Hz. The method for preparing the conductivity-enhanced polymer/carbon nano tube composite material has the advantages of capacities of obviously reducing a percolation threshold value of the polymer/carbon nano tube composite material and reducing the percolation threshold value from 4.5 percent of the common injection molding to 2.7 percent to the greatest degree, along with simpleness, high technical continuity, high efficiency and contribution to industrial production.
Description
Technical field
The present invention relates to a kind of method that injection moulding apparatus prepares electroconductibility enhanced polymer/carbon nano-tube matrix material of vibrating, belong to polymer materials forming process field.
Background technology
Carbon nanotube is made up of carbon atom, and each carbon atom combines to form hexagonal honeycomb lattice with three adjacent carbon atoms.Because they have remarkable electricity, heat and mechanical characteristics, carbon nanotube is applied in the multiple industrial circles such as field emission apparatus, electrochemistry and energy storage, microcomputer electricity system, organic and inorganic composite materials.Carbon nanotube can pass through technological synthesizing such as the pyrolytic decomposition of laser ablation, arc-over, electrochemical deposition (VCD), hydrocarbon polymer.The synthetic carbon nanotube can become conducing composite material with the polymer scale symphysis, the characteristic of the existing macromolecular material of this conducing composite material, and the performances such as electricity, mechanics that can in a big way, regulate material again are widely used in and disperse static, intercept hertzian wave etc.But the greatest drawback of this type of material is exactly a physical strength sharply descends mobile variation with the increase of conductive filler material content; When content reduced, the yield rate of product was lower, and working method is very big to the influence of yield rate.Reducing the content of conductive filler material, improve conductivity, is the final purpose of such matrix material.
As everyone knows, most polymers (like Vilaterm, Vestolen PP 7052 etc.) all has good insulating property.When adding conductive filler material (like carbon nanotube, thomel, carbon black etc.), especially after the concentration of conductive filler material surpassed a certain threshold value (exceed and ooze threshold values), its resistivity significantly descended, and formed conduction or semiconduction matrix material.Usually the preparation for the polymer/carbon nano-tube matrix material is to use the method like mechanically mixing, melt blending, solvent blend, in-situ polymerization and combination thereof to realize carbon nanotube dispersion uniformly in the polymkeric substance; But; The distribution of carbon pipe nanometer is very even, the easy reunion, and dispersiveness receives the influence of mixing equipment bigger; The threshold values height is oozed in exceeding of blend, and mechanical property reduces serious.Along with Development of Preparation Technology, in the preparation of matrix material crosses,, regulate and control or influence the motion and the orientation of carbon nanotube through the influence in outfield, formation kinetics exceedes oozes conductive network, is to reduce matrix material to exceed a kind of effective means that oozes threshold values.Can regulate and control the carbon nanotube motion at present effectively; Thereby form kinetics exceed ooze electric field and magnetic field arranged; C.A.Martin (C.A.Martin; J.K.W.Sandler; A.H.Windle; M.-K.Schwarz.Electric field-induced alignedmulti-wall carbon nanotube networks in epoxy composites.Polymer 200546 (3) pp.877-886) etc. apply of the influence of AC and DC electric field when having studied epoxy resin/MWCNT composite material solidification, discover that carbon nanotube has formed the network structure of orientation under the inducing of electric field conductivity of composite material, alternating-electric field induce can form be more evenly distributed, the more network structure of branching; Tohru Kimura (Tohru Kimura; Hiroki Ago; PolymerComposites of Carbon Nanotubes Aligned by a Magnetic Field.Advanced Materials2002 14 (9) pp.1380-1383) etc. studied the influence of magnetic field to polyester/MWCNT conducing composite material specific conductivity; Discover that the specific conductivity of matrix material is anisotropy, the specific conductivity that is parallel to field direction is than the high one magnitude of specific conductivity perpendicular to field direction.But these two kinds working (machining) efficiency is low, cost is high, complex equipments, not easy to operate.
Discover that at present there is following rule in forming method to the influence of conducing composite material specific conductivity: hot-forming＞extrusion moulding＞injection moulding.When adopting injection moulding to prepare the conducing composite material product; Low (P.
L.
S.Pegel of its specific conductivity; Thermoplastic polyurethane filled with carbon nanotubes forelectrical dissipative and conductive applications; KGK Kautschuk GummiKunststoffe; 200760 (9) pp.432-437), poor repeatability (Dirk Lellinger; Donghua Xu; Alexander Ohneiser.Influence of the injection moulding conditions on the in-linemeasured electrical conductivity of polymer-carbon nanotube composites; Phys.stat.sol. electroconductibility skewness (Tobias Villmow (b) 2008245 (10) pp.2268-2271); Sven Pegel.Influence of injection mol ding parameters on the electricalresistivity of polycarbonate filled with multi-walled carbon nanotubes, CompositesScience and Technology 2008 68pp.777-789).Therefore; Although injection moulding is one of present most widely used polymkeric substance and composite material forming working method thereof; But owing to there is an above-mentioned shortcoming, it is less to adopt injection moulding to prepare the report of polymer/carbon nano-tube conducing composite material, and not seeing yet has suitability for industrialized production.
Summary of the invention
The objective of the invention is to the deficiency of prior art and a kind of method that injection moulding apparatus prepares electroconductibility enhanced polymer/carbon nano-tube matrix material of vibrating is provided.Be characterized in the process of injection moulding, impel carbon nanotube to be orientated, form more perfect conductive path, and then improve the conductivity of polymer composites along flow direction through the pulsating pressure field that adds.
The object of the invention is realized that by following technical measures wherein said raw material umber is parts by weight except that specified otherwise.
The method that the vibration injection moulding apparatus prepares electroconductibility enhanced polymer/carbon nano-tube matrix material may further comprise the steps:
1. with carbon nanotube 1-10 part, preferred 3-7 part, polymkeric substance 99-90 part, preferred 97-93 part adds melt blending in the screw extrusion press, extrudes, granulation, and the temperature of forcing machine is: 165-225 ℃, the rotating speed of screw rod is: 70-120rpm;
2. above-mentioned blend pellet was dried by the fire 6-10 hour in temperature 50-80 ℃ baking oven, behind the plasticizing system fusion plastification of vibrating device, get in the vibration cavity, at temperature 210-240 ℃, constant temperature 5-10 minute;
3. Vibration on Start-up device, at vibration pressure 35-80MPa, vibrational frequency 0-1.2Hz makes polymer melt pass through moulding in the molten chamber that nozzle injects mould.
Carbon nanotube is single armed carbon nanotube or multi-walled carbon nano-tubes.
Polymkeric substance is Vilaterm or Vestolen PP 7052.
The plasticizing system is electrically heated plasticizing system, single screw extrusion machine plasticizing system or twin screw extruder plasticizing system.
Performance test:
Specific conductivity, the mechanical property of vibration injection moldable polymers/carbon nano tube compound material also observed microscopic appearance under sem, the result shows:
1. the pulsating pressure field that adds impels carbon nanotube to be orientated along flow direction, forms more perfect conductive path, and then improves the conductivity of polymer composites, sees for details shown in Figure 1.
2. regulate the vibration injection parameters, threshold values is oozed in exceeding of reduction polymer/carbon nano-tube matrix material.
3. regulate the vibration injection parameters, realize that the specific conductivity of polymer/carbon nano-tube matrix material increases along with the increase of vibrational frequency, see for details shown in Fig. 2-5.
4. regulate the vibration injection parameters, realize that polymer/carbon nano-tube matrix material tensile strength increases, improve specific conductivity simultaneously, see for details shown in Figure 6.
The present invention has following advantage
1. the pressure or the frequency that change vibration can obtain difference and exceed the conducing composite material that oozes threshold values.
2. preparation method of the present invention is simple, and the technology continuity is good, and efficient is high, helps suitability for industrialized production.
3. regulate the vibration injection parameters, realize that polymer/carbon nano-tube matrix material tensile strength increases, and improves specific conductivity simultaneously.
4. cross the vibration injection moulding, significantly having reduced exceeding of polymer/carbon nano-tube matrix material oozes threshold values, exceedes to ooze threshold values and be reduced to 2.7% from 4.5% maximum of common injection moulding.
5. raw material sources are wide, and energy consumption is low, and cost is low, are widely used in to disperse static, obstruct hertzian wave.
Caption
Fig. 1 is the electron scanning micrograph of vibration injection moulding Vestolen PP 7052/carbon nano tube compound material
Fig. 2 is the specific conductivity of 4wt% Vestolen PP 7052/carbon nano tube compound material and the relation of vibrational frequency
Fig. 3 is the specific conductivity of 5wt% Vestolen PP 7052/carbon nano tube compound material and the relation of vibrational frequency
Fig. 4 is the specific conductivity of 5wt% Vilaterm/carbon nano tube compound material and the relation of vibrational frequency
Fig. 5 is the specific conductivity of 6wt% Vestolen PP 7052/carbon nano tube compound material and the relation of vibrational frequency
Fig. 6 is the tensile strength of 4wt% Vestolen PP 7052/carbon nano tube compound material and the relation of elongation at break and vibrational frequency
Embodiment
Through embodiment the present invention is carried out concrete description below; Be necessary to be pointed out that at this present embodiment can only be used for the present invention is further specified; Can not be interpreted as the restriction to protection domain of the present invention, the skilled personnel of this area can make some nonessential improvement and adjustment according to the content of the invention described above.
Embodiment 1 is constant down in vibrational frequency, changes the proportioning of polymer/carbon nano-tube
The method that the vibration injection moulding apparatus prepares electroconductibility enhanced polymer/carbon nano-tube matrix material may further comprise the steps:
1. with carbon nanotube 1-10 part, Vestolen PP 7052 99-90 part adds melt blending in the screw extrusion press, extrudes, granulation, and the temperature of forcing machine is: 165 ℃ 180 ℃ 215 ℃ 220 ℃ 230 ℃ 225 ℃, the rotating speed of screw rod is: 120rpm;
2. above-mentioned blended particles was placed 8 hours in temperature 50-80 ℃ baking oven, behind the electrically heated plasticizing system fusion plastification of vibrating device, get in the vibration cavity, 230 ℃ of temperature, constant temperature 8 minutes;
3. Vibration on Start-up device; At vibration pressure 50MPa; Vibrational frequency 1.2Hz; Respectively with the proportioning of 99: 1,98: 2,97: 3,96: 4,95: 5,94: 6,93: 7,92: 8,91: 9,90: 10 Vestolen PP 7052 and multi-walled carbon nano-tubes, make the mixture melt inject moulding in the molten chamber of mould through nozzle.It is 2.7% that the exceeding of gained Vestolen PP 7052/carbon nano tube compound material oozed threshold values.
Embodiment 2 is constant down in vibrational frequency, changes the proportioning of polymer/carbon nano-tube
The method that the vibration injection moulding apparatus prepares electroconductibility enhanced polymer/carbon nano-tube matrix material may further comprise the steps:
1. with carbon nanotube 1-10 part, Vestolen PP 7052 99-90 part adds melt blending in the screw extrusion press, extrudes, granulation, and the temperature of forcing machine is: 165 ℃ 180 ℃ 215 ℃ 220 ℃ 230 ℃ 225 ℃, the rotating speed of screw rod is: 110rpm;
2. above-mentioned blended particles was placed 8 hours in temperature 50-80 ℃ baking oven, behind the single screw extrusion machine plasticizing system fusion plastification of vibrating device, get in the vibration cavity, 230 ℃ of temperature, constant temperature 8 minutes;
3. Vibration on Start-up device; At vibration pressure 50MPa; Vibrational frequency 0.6Hz; Respectively with the proportioning of 99: 1,98: 2,97: 3,96: 4,95: 5,94: 6,93: 7,92: 8,91: 9,90: 10 Vestolen PP 7052 and SWCN, make the mixture melt inject moulding in the molten chamber of mould through nozzle.It is 3.5% that the exceeding of gained Vestolen PP 7052/carbon nano tube compound material oozed threshold values.
Embodiment 3 is constant down in vibrational frequency, changes the proportioning of polymer/carbon nano-tube
The method that the vibration injection moulding apparatus prepares electroconductibility enhanced polymer/carbon nano-tube matrix material may further comprise the steps:
1. with carbon nanotube 1-10 part, high density polyethylene(HDPE) 99-90 part adds melt blending in the screw extrusion press, extrudes, granulation, and the temperature of forcing machine is: 165 ℃ 180 ℃ 200 ℃ 210 ℃ 220 ℃ 215 ℃, the rotating speed of screw rod is: 100rpm;
2. above-mentioned blended particles was placed 8 hours in temperature 50-80 ℃ baking oven, behind the twin screw extruder plasticizing system fusion plastification of vibrating device, get in the vibration cavity, 210 ℃ of temperature, constant temperature 8 minutes;
3. Vibration on Start-up device; At vibration pressure 50MPa; Vibrational frequency 1.2Hz; Respectively with the proportioning of 99: 1,98: 2,97: 3,96: 4,95: 5,94: 6,93: 7,92: 8,91: 9,90: 10 high density polyethylene(HDPE)s and multi-walled carbon nano-tubes, make the mixture melt inject moulding in the molten chamber of mould through nozzle.It is 3.8% that the exceeding of gained high density polyethylene(HDPE)/carbon nano tube compound material oozed threshold values.
Embodiment 4 is constant down in vibrational frequency, changes the proportioning of polymer/carbon nano-tube
The method that the vibration injection moulding apparatus prepares electroconductibility enhanced polymer/carbon nano-tube matrix material may further comprise the steps:
1. with carbon nanotube 1-10 part, new LDPE (film grade) 99-90 part adds melt blending in the screw extrusion press, extrudes, granulation, and the temperature of forcing machine is: 165 ℃ 180 ℃ 190 ℃ 200 ℃ 210 ℃ 205 ℃, the rotating speed of screw rod is: 100rpm;
2. above-mentioned blended particles was placed 8 hours in temperature 50-80 ℃ baking oven, behind the electrically heated plasticizing system fusion plastification of vibrating device, get in the vibration cavity, 200 ℃ of temperature, constant temperature 8 minutes;
3. Vibration on Start-up device; At vibration pressure 50MPa; Vibrational frequency 0.6Hz; Respectively with the proportioning of 99: 1,98: 2,97: 3,96: 4,95: 5,94: 6,93: 7,92: 8,91: 9,90: 10 new LDPE (film grade)s and multi-walled carbon nano-tubes, make the mixture melt inject moulding in the molten chamber of mould through nozzle.It is 4.5% that the exceeding of gained high density polyethylene(HDPE)/carbon nano tube compound material oozed threshold values.
The proportioning of embodiment 5 polymer/carbon nano-tubes is constant down, changes vibrational frequency
The method that the vibration injection moulding apparatus prepares electroconductibility enhanced polymer/carbon nano-tube matrix material may further comprise the steps:
1. with 96 parts of Vestolen PP 7052,4 parts of multi-walled carbon nano-tubes add melt blending in the screw extrusion press, extrude, granulation, and the temperature of forcing machine is: 165 ℃ 180 ℃ 215 ℃ 220 ℃ 230 ℃ 225 ℃, the rotating speed of screw rod is: 120rpm;
2. above-mentioned blended particles was placed 8 hours in temperature 50-80 ℃ baking oven, join in the single screw extrusion machine plasticizing system of vibrating device, in 230 ℃ of temperature, fusion plastification once more in vibration cavity, constant temperature 8 minutes;
3. Vibration on Start-up device, at vibration pressure 50MPa, vibrational frequency is with 0Hz, 0.3Hz, 0.6Hz, 0.9Hz, 1.2Hz, makes the mixture melt inject moulding in the molten chamber of mould through nozzle.The volume conductance of gained Vestolen PP 7052/multi-wall carbon nano-tube composite material is as shown in Figure 2.
The proportioning of embodiment 6 polymer/carbon nano-tubes is constant down, changes vibrational frequency
The method that the vibration injection moulding apparatus prepares electroconductibility enhanced polymer/carbon nano-tube matrix material may further comprise the steps:
1. with 95 parts of Vestolen PP 7052,5 parts of SWCNs add melt blending in the screw extrusion press, extrude, granulation, and the temperature of forcing machine is: 165 ℃ 180 ℃ 215 ℃ 220 ℃ 230 ℃ 225 ℃, the rotating speed of screw rod is: 110rpm;
2. above-mentioned blended particles was placed 8 hours in temperature 50-80 ℃ baking oven, behind the twin screw extrusion plasticizing system fusion plastification of vibrating device, get in the vibration cavity, 230 ℃ of temperature, constant temperature 8 minutes;
3. Vibration on Start-up device, at vibration pressure 50MPa, vibrational frequency is with 0Hz, 0.3Hz, 0.6Hz, 0.9Hz, 1.2Hz, makes the mixture melt inject moulding in the molten chamber of mould through nozzle.The volume conductance of gained Vestolen PP 7052/SWCN matrix material is as shown in Figure 3.
The proportioning of embodiment 7 polymer/carbon nano-tubes is constant down, changes vibrational frequency
The method that the vibration injection moulding apparatus prepares electroconductibility enhanced polymer/carbon nano-tube matrix material may further comprise the steps:
1. with 95 parts of high density polyethylene(HDPE)s, 5 parts of multi-walled carbon nano-tubes add melt blending in the screw extrusion press, extrude, granulation, and the temperature of forcing machine is: 165 ℃ 180 ℃ 200 ℃ 210 ℃ 220 ℃ 215 ℃, the rotating speed of screw rod is: 100rpm;
2. above-mentioned blended particles was placed 8 hours in temperature 50-80 ℃ baking oven, behind the electrically heated plasticizing system fusion plastification of vibrating device, get in the vibration cavity, 230 ℃ of temperature, constant temperature 8 minutes;
3. Vibration on Start-up device, at vibration pressure 50MPa, vibrational frequency is with 0Hz, 0.3Hz, 0.6Hz, 0.9Hz, 1.2Hz, makes the mixture melt inject moulding in the molten chamber of mould through nozzle.The volume conductance of gained Vestolen PP 7052/SWCN matrix material is as shown in Figure 4.
The proportioning of embodiment 8 polymer/carbon nano-tubes is constant down, changes vibrational frequency
The method that the vibration injection moulding apparatus prepares electroconductibility enhanced polymer/carbon nano-tube matrix material may further comprise the steps:
1. with 94 parts of Vestolen PP 7052,6 parts of SWCNs add melt blending in the screw extrusion press, extrude, granulation, and the temperature of forcing machine is: 165 ℃ 180 ℃ 215 ℃ 220 ℃ 230 ℃ 225 ℃, the rotating speed of screw rod is: 110rpm;
2. above-mentioned blended particles was placed 8 hours in temperature 50-80 ℃ baking oven, behind the single screw extrusion machine plasticizing system fusion plastification of vibrating device, get in the vibration cavity, 230 ℃ of temperature, constant temperature 8 minutes;
3. Vibration on Start-up device, at vibration pressure 50MPa, vibrational frequency is with 0Hz, 0.3Hz, 0.6Hz, 0.9Hz, 1.2Hz, makes the mixture melt inject moulding in the molten chamber of mould through nozzle.The volume conductance of gained Vestolen PP 7052/SWCN matrix material is as shown in Figure 5.
The proportioning of embodiment 9 polymer/carbon nano-tubes is constant down, changes vibrational frequency
The method that the vibration injection moulding apparatus prepares electroconductibility enhanced polymer/carbon nano-tube matrix material may further comprise the steps:
1. with 96 parts of Vestolen PP 7052,4 parts of multi-walled carbon nano-tubes add melt blending in the screw extrusion press, extrude, granulation, and the temperature of forcing machine is: 165 ℃ 180 ℃ 215 ℃ 220 ℃ 230 ℃ 225 ℃, the rotating speed of screw rod is: 120rpm;
2. above-mentioned blended particles was placed 8 hours in temperature 50-80 ℃ baking oven, behind the twin screw extruder plasticizing system fusion plastification of vibrating device, get in the vibration cavity, 230 ℃ of temperature, constant temperature 8 minutes;
3. Vibration on Start-up device, at vibration pressure 50MPa, vibrational frequency is with 0Hz, 0.3Hz, 0.6Hz, 0.9Hz, 1.2Hz, makes the mixture melt inject moulding in the molten chamber of mould through nozzle.The tensile strength and the elongation at break of gained Vestolen PP 7052/multi-wall carbon nano-tube composite material are as shown in Figure 6.
Claims (4)
1. one kind is vibrated the method that injection moulding apparatus prepares electroconductibility enhanced polymer/carbon nano-tube matrix material, it is characterized in that this method may further comprise the steps:
(1) with carbon nanotube 1-10 weight part, polymkeric substance 99-90 weight part adds melt blending in the screw extrusion press, extrudes, granulation, and the temperature of forcing machine is: 165-225 ℃, the rotating speed of screw rod is: 90-120rpm;
(2) above-mentioned blended particles was placed 6-10 hour in temperature 50-80 ℃ baking oven, behind the plasticizing system fusion plastification of vibrating device, get in the vibration cavity, at temperature 210-240 ℃, constant temperature 5-10 minute;
(3) Vibration on Start-up device, at vibration pressure 35-80MPa, vibrational frequency 0.3-1.2Hz makes polymer melt pass through moulding in the molten chamber that nozzle injects mould.
2. vibrate the method that injection moulding apparatus prepares electroconductibility enhanced polymer/carbon nano-tube matrix material according to claim 1, it is characterized in that carbon nanotube is single armed carbon nanotube or multi-walled carbon nano-tubes.
3. vibrate the method that injection moulding apparatus prepares electroconductibility enhanced polymer/carbon nano-tube matrix material according to claim 1, it is characterized in that polymkeric substance is Vilaterm or Vestolen PP 7052.
4. vibrate the method that injection moulding apparatus prepares electroconductibility enhanced polymer/carbon nano-tube matrix material according to claim 1, it is characterized in that the plasticizing system is electrically heated plasticizing system, single screw extrusion machine plasticizing system or twin screw extruder plasticizing system.
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| CN102634153B (en) * | 2012-04-12 | 2013-08-07 | 东华大学 | Preparation method of carbon nano tube composite material with high-content uniformly dispersed carbon nano tubes |
| CN110229422A (en) * | 2019-07-01 | 2019-09-13 | 四川大学 | Low-warpage PP R base composite wire material and preparation method thereof for 3D printing |
| CN112140423B (en) * | 2020-08-04 | 2022-04-15 | 上海祺申塑业股份有限公司 | Method for filling nano material for plastic particles |
| CN111975935A (en) * | 2020-08-13 | 2020-11-24 | 四川省劲腾环保建材有限公司 | Multidimensional variable-frequency vibration extrusion forming technology suitable for producing wallboard |
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| FR2893947A1 (en) * | 2005-11-30 | 2007-06-01 | Arkema Sa | Obtaining pulverulent compositions, useful as polymeric materials, reinforcement and/or modifying agent, comprises contact of carbon nanotubes e.g. with a monomer (mixture), optional heat treatment, purification and/or separation |
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|---|---|---|---|---|
| US5658600A (en) * | 1994-09-16 | 1997-08-19 | Nissei Plastic Industrial Co., Ltd. | Injection molding machine having assembly for vibration processing |
| CN2464532Y (en) * | 2001-02-26 | 2001-12-12 | 四川大学 | Apparatus for vibration moulding melted polymer |
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|---|---|
| CN101942137A (en) | 2011-01-12 |
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