CN106432899A - Activated carbon nanotube modified polypropylene (PP) antistatic film - Google Patents

Activated carbon nanotube modified polypropylene (PP) antistatic film Download PDF

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CN106432899A
CN106432899A CN201610529477.8A CN201610529477A CN106432899A CN 106432899 A CN106432899 A CN 106432899A CN 201610529477 A CN201610529477 A CN 201610529477A CN 106432899 A CN106432899 A CN 106432899A
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activated carbon
carbon nanotubes
dispersant
thin film
modified polypropylene
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王鹏
甄万清
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Jiaxing Gaozhenggao Polymer Material Co Ltd
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Jiaxing Gaozhenggao Polymer Material Co Ltd
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Abstract

The invention discloses an activated carbon nanotube modified polypropylene (PP) antistatic film. The PP antistatic film is prepared from the following components in parts by mass: 70-95 parts of PP base materials, 0.01-10 parts of activated carbon nanotubes and 0.1-20 parts of an aid, wherein the aid is one or a mixture of two or more of a dispersant B, a coupling agent, an antioxidant, a lubricant and an abrasive agent; an activated carbon nanotube is prepared through the following steps: the dispersant A is dissolved in a solvent, and a dispersant solution is obtained; then, the dispersant solution is sprayed into the carbon nanotube stirred at a high speed with a high pressure spray method, and the activated carbon nanotube is prepared after high-speed stirring and mixing. The PP antistatic film has good conductivity, high antistatic durability and long service life.

Description

A kind of modified polypropylene antistatic thin film of Activated Carbon Nanotubes
First, technical field
The present invention relates to a kind of modified polypropylene antistatic thin film of Activated Carbon Nanotubes.
2nd, background technology
Polypropylene (PP) is as one of five big general-purpose plastics, its abundant raw material source, low price, easily processed into type, Mechanical property, heat resistance, high comprehensive performance, and nontoxic, be easily recycled, therefore its thin film and film article are in a lot of fields All it is used widely.Because polypropylene molecule is nonpolar, electrical insulating property is very high, and its surface resistivity is 1016～1017 Ω, specific insulation 1016～1018Ω·cm.So, comparatively, polypropylene is to compare in macromolecule polymer material to be easier to produce Raw static charge accumulation.And once generating accumulation of static electricity, its harm should not be underestimated.This can cause to give birth in polypropylene film Produce or the course of processing in, be difficult to disappear by conduction because the reasons such as friction make electrostatic on thin film band, production to thin film, add Work, application bring problem.
Anti-static PP thin film is applied in fields such as powder packaging, packaging for foodstuff, candy wrappings first, because quiet The poly- reason of electrodeposition, can cause dust or other booties of PP thin film son's wife's in the air, not only have influence on the attractive in appearance of film surface, And in use Electrostatic Absorption can also occur, impact is normal to be used.In recent years, Anti-static PP thin film and product you in machine The fields such as electric product, instrument and meter part, electronic devices and components, large scale integrated circuit, wiring board develop rapidly, demand and make Consumption increases sharply.Therefore, just more need the eliminostatic on polypropylene film surface with corresponding method, to meet production The demand of life.
PP antistatic film mainly includes to apply antistatic additive to prepare PP antistatic film, produces PP using conductivity type filler Antistatic plastic film, using coating material production PP antistatic film etc..
Wherein, PP antistatic plastic thin film not only can be produced using conductivity type filler, and due to its antistatic behaviour base In the electric conductivity of filler, persistency is good compared with surfactant type PP antistatic film, and antistatic behaviour is by the shadow of ambient humidity Sound is little.
In numerous conductivity type fillers, CNT has good electric conductivity, while have larger draw ratio again, because And be well suited for making conductive filler, with respect to other metallic particles and graphite granule, its little consumption can just form conductive net, And its density ratio metallic particles is much smaller, is difficult because of the effect of gravity and coagulation.Made using these characteristics of CNT It is added in plastics for conducting medium, strong impact can be produced on the electric conductivity of plastics.At present, CNT is in PP antistatic material Applied research in material improves dispersibility of the CNT in PP mainly by structure and the content of change CNT, And CNT is carried out being surface-treated the electric conductivity and other properties that carry out balanced PP anti-static material.
3rd, content of the invention
The invention provides a kind of modified polypropylene antistatic thin film of Activated Carbon Nanotubes, CNT is preprocessed to be changed After property, in adding to PP material matrix as conductive filler, polypropylene antistatic thin film is prepared.
The technical solution used in the present invention is：
A kind of modified polypropylene antistatic thin film of Activated Carbon Nanotubes, the modified polypropylene of the Activated Carbon Nanotubes resists Electrostatic film is grouped into by the group of following weight portion：
70～95 mass parts of PP polymeric matrix material, 0.01～10 mass parts of Activated Carbon Nanotubes, 0.1～20 matter of auxiliary agent Amount part；
The auxiliary agent is dispersant B, coupling agent, antioxidant, lubricant, one or more mixed in antifriction liniment Close；
The Activated Carbon Nanotubes are obtained by the following method：
Dispersant A is dissolved in solvent, dispersant solution is obtained, then dispersant solution is sprayed into by high-pressure spraying method In the CNT of high-speed stirred, after high-speed stirred mixing, prepared Activated Carbon Nanotubes.The CNT, dispersant A, molten The quality parts ratio of agent is 85～95：0.1～5：5～10.
The PP polymeric matrix material, Activated Carbon Nanotubes, auxiliary agent mass fraction be 70～95 mass parts, 0.01～ 10 mass parts, 0.1～20 mass parts, preferably 70～95 mass parts, 1～10 mass parts, 0.1～20 mass parts；
The auxiliary agent is dispersant B, coupling agent, antioxidant, lubricant, one or more mixed in antifriction liniment Close；It is preferred that the auxiliary agent be coupling agent, antioxidant, lubricant, one or more in antifriction liniment mixed with dispersant B Close, more preferably auxiliary agent be coupling agent, antioxidant, one or more in antifriction liniment with dispersant B, lubricant mixed Close.
Further, preferably the auxiliary agent is dispersant B, coupling agent, antioxidant, lubricant and antifriction liniment, the raw material Formula be：PP polymeric matrix material, Activated Carbon Nanotubes, dispersant B, coupling agent, antioxidant, lubricant, antifriction liniment Mass fraction be 70～90 mass parts, 1～10 mass parts, 0.1～10 mass parts, 0.01～5 mass parts, 0.01～2 mass Part, 0.01～10 mass parts, 0.01～5 mass parts, wherein dispersant B, coupling agent, antioxidant, lubricant and antifriction liniment Total mass fraction is 0.1～20 mass parts.
Further, in preferred steps (2), the formula of raw material is：PP polymeric matrix material, Activated Carbon Nanotubes, dispersion Agent B, coupling agent, antioxidant, lubricant, the mass fraction of antifriction liniment are 70～90 mass parts, 1～10 mass parts, 1～10 matter Amount part, 0.01～3 mass parts, 0.01～2 mass parts, 0.01～3 mass parts, wherein 0.01～5 mass parts, dispersant B, coupling Agent, antioxidant, total mass fraction of lubricant and antifriction liniment are 0.1～20 mass parts.
Further, in preferred steps (2), the formula of raw material is：PP polymeric matrix material, Activated Carbon Nanotubes, dispersion Agent B, coupling agent, antioxidant, lubricant, the mass fraction of antifriction liniment are 70～90 mass parts, 3～8 mass parts, 1～8 mass Part, 0.5～3 mass parts, 0.5～2 mass parts, 0.5～3 mass parts, 0.5～3 mass parts.
In methods described, dispersant A and dispersant B are used for distinguishing the dispersant used in different step, and A, B do not have Chemical sense.
The dispersant A and dispersant B each stand alone as dodecylbenzene sodium sulfonate, polyvinylpyrrolidone, polyethylene Alcohol, xanthan gum, sodium lauryl sulphate, Triton X-100, sodium carboxymethyl cellulose, Dihexadecylphosphate, Ah Draw primary glue, cetyl trimethylammonium bromide, alkyl phenol ethylene oxide condensation substance emulsifying agent, cetyl trimethyl sodium bromide, One or more mixture in Kynoar.
The solvent be water, N,N-dimethylformamide, N-Methyl pyrrolidone, n-butyl alcohol, chloroform, dehydrated alcohol, third One or more mixture in ketone, petroleum ether, ethyl acetate, butyl acetate；
The CNT, dispersant A, the quality parts ratio of solvent are 85～95：0.1～5：5～10.
The CNT is multi-walled carbon nano-tubes, one or two the mixture in SWCN, preferably many Wall carbon nano tube.
The PP polymeric matrix material is particle or pulverulent material, preferably uses PP polymer pulverulent material, average grain Footpath is 0.5 μm and arrives 5mm, the preferably melt index of PP polymeric matrix material is 2-100g/10min, preferably 10-30g/10min, Beneficial to dispersion of the CNT in PP matrix.
The coupling agent is titante coupling agent, one or more the mixture in silane coupling agent；Institute It can be isopropyl three (dioctylphyrophosphoric acid acyloxy) titanate esters, three (dioctyl phosphoric acid of isopropyl to state titante coupling agent Acyloxy) titanate esters, two Oleic acid acyloxy of isopropyl (dioctyl phosphoric acid acyloxy) titanate esters, monoalkoxy unsaturated fatty acid One or more mixture in titanate esters or Di(dioctylpyrophosphato) ethylene titanate；The silane idol Connection agent can adopt KH550, one or more the mixture in KH560, KH570, KH792, DL602, DL171；
The antioxidant is preferably 1098,168,1010,1076, DLTP, one or more in MB, 164,264 Mixture.
The lubricant is fatty acid, aliphatic amide type or ester lubricant, paraffin series lubricant agent, metallic soap salt profit One or more mixing in lubrication prescription, low-molecular-weight wax, further, the preferred PE wax of the lubricant, PP wax, montanin wax, One or more mixing in silicone powder, stearic acid, Oleic acid, calcium stearate, ethylene bis stearic acid amide, erucyl amide Thing
The antifriction liniment is preferably nano inorganic implant or nano plastic micropowder, and the nano inorganic implant is usual For nano-calcium carbonate, nanometer calcium silicates, nano silicon, nanoclay etc..
The modified polypropylene antistatic thin film of Activated Carbon Nanotubes that the present invention is provided can be obtained by the following method：By activity CNT and PP polymeric matrix material stirring and evenly mixing, are then mixed with auxiliary agent, melt extrude pelletize through double screw extruder Prepared PP/ carbon nanotube conducting master batch；PP/ carbon nanotube conducting master batch is prepared into by blowing, curtain coating or stretch processes To the modified polypropylene antistatic thin film of Activated Carbon Nanotubes.Prepare what the technique of thin film was known to the skilled person.
The processing technique of the double screw extruder is 100～1000r/min of screw speed, and extrusion temperature is 180-250 ℃.
Double screw extruder melt extrudes pelletize, and pelletize mode has multiple, and optional water cooling bracing pelletizing, air-cooled tie rod are cut Grain, die face are earnestly, cut under water.The method being well known to those skilled in the art.
Present invention high-pressure spraying method used when preparing Activated Carbon Nanotubes is to fill dispersant solution by high-pressure spraying Put the CNT that high-speed stirred is sprayed in the form of spraying, the high-pressure spray device can adopt high-pressure spraying machine, by height Dispersant solution is become spray form to spray in material through high-pressure nozzle by water pump.The high-pressure spraying machine is located in advance for CNT Reason still belongs to the first time.Dispersant solution is atomized by high-pressure spraying method, obtains a large amount of fine droplets after atomization, significantly increase solution with The contact area of CNT, is conducive to carbon nanotube particulate to be coated by auxiliary agent, strengthens its dispersibility.
In the high-pressure spraying method, spray rate is generally 10～100ml/min；
Atomized particle size is 0.1～1um.
The rotating speed of the high-speed stirred is 300～1500 turns/min.
Generally 1 minute～1 hour time of the high-speed stirred mixing, preferably 5～40 minutes.
The present invention carries out high-speed stirred to CNT, to its surface pretreatment, while by dispersant, surface activity The auxiliary agents such as agent are dissolved in liquid by way of spraying in the carbon nanotube dust for being sprayed in stirring so that CNT table Face activates, while by the material uniform wet such as dispersant, surfactant, causing to be formed between CNT and repelling, significantly carry The high dispersibility of CNT, and the bulk density of CNT can be improved simultaneously, with obtain optimal dispersion effect with good Good processability.
The present invention innovation by CNT after pretreatment modification, add to PP material matrix as conductive filler In, high efficiency dispersion PP/ carbon nanotube conducting master batch is prepared, is then prepared not by blowing, curtain coating or stretch processes PP antistatic film with performance.Compared with traditional PP antistatic film, CNT during due to reaching same electric conductivity Addition well below other conductive fillers addition, hence in so that the antistatic film maintains PP to the full extent Original performance of matrix resin, improves antistatic persistency and the service life of thin film.
The polypropylene antistatic thin film that the present invention is provided, outward appearance：Uniform color, no stain, corrugationless, surface is no raised, No broken hole, no vestige；Excellent mechanical：Tensile strength：>=20MPA, elongation at break：>=150%, surface resistivity (Ω)：106～109(content of carbon nanotubes=3wt.%).
4th, specific embodiment
With specific embodiment, technical scheme is described further below, but the present invention protect content not It is limited to this.
Embodiment 1～16
According to the form below 1 takes each raw material, and dispersant is dissolved in solvent, obtains dispersant solution, then leads to dispersant solution Cross the CNT (1～30nm of diameter, 1～100 μm of length, bulk density 0.02g/mL) that high pressure spray process sprays into high-speed stirred In, technological parameter is as shown in table 1, after high-speed stirred mixing, prepared Activated Carbon Nanotubes；
Table 1
The performance test results of obtained Activated Carbon Nanotubes such as table 2 below
Table 2
The dispersibility experiment is detected by the following method：By Activated Carbon Nanotubes 10mg obtained in embodiment 1～16 respectively 10mL is added to prepare in the solvent (referring to table 1) used by the Activated Carbon Nanotubes, ultrasonic disperse 30 minutes, suspension is obtained, quiet Put, when occurring substantially being layered, the record time is that holding time, acquired results refer to table 2.Holding time is longer, shows its dispersion Property is better.Not pretreated CNT cannot form stable suspension.
Above-mentioned test result indicate that, after pretreatment, the bulk density of CNT improve 10 times or so (untreated The bulk density of CNT is 0.02g/mL or so), dispersibility is all significantly increased.
Embodiment 17～32
Activated Carbon Nanotubes prepared by embodiment 1～16 and PP polymer pulverulent material (100 μm～2mm of mean diameter) Stirring and evenly mixing, is then mixed with auxiliary agent, and each raw material dosage refers to table 3 and table 4, is melt extruded, stretches through double screw extruder, cold But pelletizing is obtained PP/ carbon nanotube conducting master batch；The processing technique of double screw extruder is screw speed 200r/min, extrusion temperature Spend for 180 DEG C.
The content of carbon nanotubes of the PP/ carbon nanotube conducting master batch for preparing is as shown in table 5.
The PP/ carbon nanotube conducting master batch for preparing is obtained antistatic film through blow moulding machine blowing, according to《GB/T1410- 2006 solid insulating material specific insulations and surface resistivity test method》The surface resistivity of testing film, and detect which Physical property, as a result as shown in table 5.
Table 3
Table 4
Table 5
Embodiment as shown by data, the surface resistivity of antistatic film prepared by the present invention is preferable, in content of carbon nanotubes In the case of 3wt.% or so, surface resistivity is 106～109Ω or so, antistatic property is good.And excellent mechanical, Tensile strength：>=20MPA, elongation at break：>=150%.

Claims (10)

1. the modified polypropylene antistatic thin film of a kind of Activated Carbon Nanotubes, it is characterised in that the Activated Carbon Nanotubes are modified Polypropylene antistatic thin film is grouped into by the group of following weight portion：
70～95 mass parts of PP polymeric matrix material, 0.01～10 mass parts of Activated Carbon Nanotubes, 0.1～20 mass of auxiliary agent Part；
The auxiliary agent is dispersant B, coupling agent, antioxidant, lubricant, one or more the mixing in antifriction liniment；
The Activated Carbon Nanotubes are obtained by the following method：
Dispersant A is dissolved in solvent, dispersant solution is obtained, then dispersant solution is sprayed at a high speed by high-pressure spraying method In the CNT of stirring, after high-speed stirred mixing, prepared Activated Carbon Nanotubes.
2. the modified polypropylene antistatic thin film of Activated Carbon Nanotubes as claimed in claim 1, it is characterised in that the carbon is received Mitron, dispersant A, the quality parts ratio of solvent are 85～95：0.1～5：5～10.
3. the modified polypropylene antistatic thin film of Activated Carbon Nanotubes as claimed in claim 1, it is characterised in that the dispersion Agent A and dispersant B each stand alone as dodecylbenzene sodium sulfonate, polyvinyl pyrilodone, POLYPROPYLENE GLYCOL, xanthan gum, dodecane Base sodium sulfate, Triton X-100, sodium carboxymethyl cellulose, Dihexadecylphosphate, arabic gum, cetyl three One kind in methyl bromide ammonium, alkyl phenol ethylene oxide condensation substance emulsifying agent, cetyl trimethyl sodium bromide, Kynoar Or two or more mixture.
4. the modified polypropylene antistatic thin film of Activated Carbon Nanotubes as claimed in claim 1, it is characterised in that the auxiliary agent For one or more and dispersant B, the mixing of lubricant in coupling agent, antioxidant, antifriction liniment.
5. the modified polypropylene antistatic thin film of Activated Carbon Nanotubes as claimed in claim 1, it is characterised in that the auxiliary agent For dispersant B, coupling agent, antioxidant, lubricant and antifriction liniment, the formula of the raw material is：PP polymeric matrix material, work Property CNT, dispersant B, coupling agent, antioxidant, lubricant, antifriction liniment mass fraction be 70～90 mass parts, 1～ 10 mass parts, 0.1～10 mass parts, 0.01～5 mass parts, 0.01～2 mass parts, 0.01～10 mass parts, 0.01～5 mass Part, wherein dispersant B, coupling agent, antioxidant, total mass fraction of lubricant and antifriction liniment are 0.1～20 mass parts.
6. the modified polypropylene antistatic thin film of Activated Carbon Nanotubes as claimed in claim 1, it is characterised in that the solvent For water, N,N-dimethylformamide, N-Methyl pyrrolidone, n-butyl alcohol, chloroform, dehydrated alcohol, acetone, petroleum ether, acetic acid second One or more mixture in ester, butyl acetate.
7. the modified polypropylene antistatic thin film of Activated Carbon Nanotubes as claimed in claim 1, it is characterised in that the coupling Agent is titante coupling agent, one or more the mixture in silane coupling agent.
8. the modified polypropylene antistatic thin film of Activated Carbon Nanotubes as claimed in claim 1, it is characterised in that the antioxygen Agent is 1098,168,1010,1076, DLTP, one or more the mixture in MB, 164,264.
9. the modified polypropylene antistatic thin film of Activated Carbon Nanotubes as claimed in claim 1, it is characterised in that the lubrication Agent is fatty acid, in aliphatic amide type or ester lubricant, paraffin series lubricant agent, metallic soap salt lubricant, low-molecular-weight wax One or more mixing.
10. the method for claim 1, it is characterised in that in step (2), the antifriction liniment is filled out for nano inorganic Fill thing or nano plastic micropowder.
CN201610529477.8A 2016-06-30 2016-06-30 Activated carbon nanotube modified polypropylene (PP) antistatic film Pending CN106432899A (en)

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CN109836521A (en) * 2017-11-28 2019-06-04 中国石油天然气股份有限公司 A kind of carbon nanotube/polypropylene composite materials preparation method
CN109705463A (en) * 2018-12-28 2019-05-03 朱雪梅 A kind of macromolecule polypropylene film and preparation method thereof
CN110372959A (en) * 2019-07-23 2019-10-25 东风汽车集团有限公司 A kind of low smell, low VOC carbon nanotube reinforced polypropylene compound material and preparation method thereof

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