CN101250321A - Preparation of light electric polyurethane foam plastic - Google Patents
Preparation of light electric polyurethane foam plastic Download PDFInfo
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- CN101250321A CN101250321A CNA2008100450099A CN200810045009A CN101250321A CN 101250321 A CN101250321 A CN 101250321A CN A2008100450099 A CNA2008100450099 A CN A2008100450099A CN 200810045009 A CN200810045009 A CN 200810045009A CN 101250321 A CN101250321 A CN 101250321A
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Abstract
The invention discloses a preparation process of soft conductivity polyurethane foaming plastic, which comprises firstly conducting modification process for the surface of carbon nano tube with strong oxidant, evenly dispersing carbon nano tube whose surface is modified into polyether polyol through the certain dispersion technology to obtain the mixing solution of carbon nano tube and polyether polyol, adding foaming agent and various other auxiliary agent into the mixing solution of carbon nano tube and polyether polyol according to certain proportion, evenly stirring and mixing with strong force, then adding casting into dies after fully mixing and reacting with certain amount of diisocyanate, closing dies, and finally conducting post curing, thereby obtaining products. The soft conductivity polyurethane foaming plastic which is prepared by the invention has excellent conductivity property, the volume resistivity can reach about 10 4 omega cm when the content of carbon nano tube is only 2.0wt%. The conductivity property can meet the requirements in fields such as national defense and electric information industry and the like for the soft conductivity foaming plastic.
Description
Technical field
The invention belongs to the novel conductive technical field of polymer materials, is a kind of preparation carbon nanotubes (CarbonNanotubes, conduction CNTs) and method of anlistatig flexible urethane foam.
Background technology
Owing to have characteristics such as porous, density is low, corrosion-resistant, thermal and insulating performance is good, flexible urethane foam is widely used in fields such as national defence, industry, daily life.Yet the volume specific resistance of common flexible urethane foam is 10
13-10
17Ω cm, material surface are easy to assemble a large amount of static electric charges, produce very high electrostatic potential, thereby set off an explosion and fire etc., cause enormous economic loss.According to incompletely statistics, only in electronic industry, annual because static discharges the loss that causes, and the U.S. is up to 10,000,000,000 dollars, Britain is 2,000,000,000 pounds.Along with the develop rapidly of electronic industry, flexible urethane foam has been widely used as electronic product wrapping material such as electronic component, unicircuit.Yet application requiring material in these areas has the performance of conduction, antistatic even electromagnetic shielding.Therefore, the volume specific resistance of flexible urethane foam need be reduced to 10
10Below, the static electric charge that is beneficial to material surface discharges in the environment towards periphery, thereby guarantees that packaged electronic product is not damaged because of accumulation of static electricity.Therefore, to explosive, the delicate products of electrostatic sensitive, all adopt electrostatic protection both at home and abroad.In recent years, countries in the world are that academia or industrial community have all dropped into a large amount of human and material resources research and development conductions and anti-electrostatic polymer foam materials.
Because foam densities is low, be vesicular structure, especially flexible urethane foam because of its density is very low, cell wall and stud size are very little, is difficult in and wherein forms effective conductive path, improves its conductivity difficulty more.The method of raising urethane foam conductivity and few with regard at present domestic and international present Research, mainly contains following method at present.
Traditional polyurethane foam method of improving is to add static inhibitor in polyurethane system, in use, static inhibitor moves to the outside gradually from polyurethane matrix inside, thereby improve the antistatic property of urethane foam, but with increasing duration of service, the loss gradually of static inhibitor in the urethane foam, antistatic property variation even disappearance are so the antistatic stability of the porous plastics that this method obtains is very poor.Britain ABM chemical company (Davies waits .Resin Technol, and 1988,17 (2): 7) since the eighties in last century, developed Catafor series quaternary ammonium salt static inhibitor.Add the Catafor of 2wt%-3wt% in the low-density polyurethane foam wrapping material, can make surface resistivity and volume specific resistance drop to 10 respectively
11Ω and 10
10-10
11Ω cm.If further improve the molecular weight of this static inhibitor, surface resistivity also can reduce to 1.45 * 10
10Ω.Japanese Kao crystal soda company (Ri Tekaiping 4-298517 (1992)) is since the seventies in last century, adopt a series of quaternary ammonium salt static inhibitor to improve the antistatic property of polyurethane foam, the volume specific resistance of gained foam materials sample was measured after 1 day and 7 days, was respectively 1.8 * 10
7Ω cm and 1.5 * 10
7Ω cm has good antistatic performance, but the less stable of the electrical property of this porous plastics, and loses gradually with prolonging antistatic property duration of service.Germany Semperit company (Ger Offen 2 423 116 (1975)) adopts a series of quaternary ammonium salt static inhibitor to improve pre-polymerization method polyurethane foamed material antistatic property the seventies in last century, and the surface resistivity of gained foam samples also only reduces to 2 * 10
9～10
10Ω.Domestic, Jiang Zhiguo etc. (Jiang Zhiguo, etc. Beijing chemical industry, 1993,23 (3): 10) in open-celled rigid polyurethane foams, add 15wt% phosphoric acid ester static inhibitor.The volume specific resistance and the surface resistivity of goods are respectively 7.9 * 10
9Ω cm and 1.3 * 10
10Ω is only near the requirement of Antistatic Foam Plastics.
In addition, can also adopt some conductive filler materials (as metal-powder, graphite, carbon black etc.) thus be filled in the polyurethane matrix and can improve electroconductibility.But polyurethane foam is a home position polymerization reaction, and this has brought difficulty for the dispersion of conductive filler material in polyurethane matrix.The more important thing is that the size between the inner abscess of urethane foam descends to the edge gradually from the centre of pillar, large-sized conductive filler material is difficult to be dispersed in from pillar edge section far away, thereby conductive path is difficult to form.Therefore, see that the electroconductibility of carbon black-filled urethane foam is all relatively poor, and technology stability is bad with regard to present correlative study.U.S. Bumett company (US Pat4621106 (1986)) proposed in 1986, added conductive carbon black particulate halogenated acetic acid in prescription, and the flexible PU foam surface resistivity of making is 2.4 * 10
6Ω, electrostatic attenuation time 0.65s.Wu Shuqing etc. (Wu Shuqing, etc. Chinese plastics, 2001,15 (12): 52) also prepared carbon black filled urethane foam, volume specific resistance can reach 10
7-10
9Ω cm.Yan Bing etc. (tight ice, etc. New Chemical Materials, 2002,30 (9): 26) Zhi Bei carbon black filled polyurethane foam composite, with the increase of content of carbon black, volume specific resistance decreases, and content of carbon black was up to 10% o'clock, and volume specific resistance still is 10
8Ω cm.Jiang Zhiguo etc. (Jiang Zhiguo, etc. Beijing chemical industry, 1993,23 (3): 10) studied carbon black filled open-cell polyurethane foam, finding increases with content of carbon black, and product volume resistivity and surface resistivity slowly descend simultaneously.When the sooty weight fraction reached 7.5%, volume specific resistance and surface resistivity were 1.4 * 10
8Ω cm and 2.6 * 10
8Ω has reached anlistatig requirement, still, when content of carbon black less than 5% the time, the resistivity of goods is not had influence substantially.Applicant (LiZM et al.Polymer-Plastics Technology and Engineering, 2005,44:1323) studied expansible black lead and filled the influence of rigid urethane foam its conductivity, find that volume specific resistance is still up to 1.3 * 10 when expansible black lead content is 20wt%
14Ω cm.
Also can improve the electrical property of urethane foam by conductive gelatin dipping or steam dipping in-situ polymerization, but this method is also only effective to the perforate polyurethane foam, and the polymkeric substance of in-situ polymerization and the interface of polyurethane matrix bonding are very poor, easily come off, along with the prolongation of duration of service, the electrical property of material descends rapidly.(Frisch such as Frisch, et al.Journal of Applied Polymer Science, 2001,80 (6): 893) with the soft and rigid urethane foam of polyaniline dipping, absorbed polyaniline fully up to foam, then at 0 ℃ of hydrochloric acid soln that sample is placed different concns, flooded the foam of polyaniline with washed with de-ionized water, dried by the fire 48 hours down at 80 ℃ then, found that the specific conductivity of flex foam does not change with the dimensional change of sample, and for the rigid foam sample of same size, its specific conductivity increases sharply with the increase of the concentration of acid, and its specific conductivity has reached anlistatig requirement.Brady etc. (Brady, et al.Sensors andActuators A, 2005,119:398) by the method for in-situ polymerization, polypyrrole is deposited on the open-celled polyurethane foams abscess inwall, obtain the matrix material of polypyrrole/polyurethane foam.Discover that along with the increase of in-situ polymerization number of times, the matrix material specific conductivity raises gradually, through behind in-situ polymerization, specific conductivity is 5.78 * 10
-8S/cm, through behind three in-situ polymerizations, the specific conductivity of matrix material brings up to 1.25 * 10
-4S/cm.Deng Jianguo (Deng Jianguo, etc. plastics industry, 2006,5:43) synthesized urethane/polyaniline antistatic matrix material with dipping adsorpting polymerization method.Studied of the influence of polyaniline content, found that the surface resistivity of antistatic material drops to 10 when polyaniline content is 0.12% the antistatic property of matrix material
5The order of magnitude, when still further improving polyaniline content again, the surface resistivity of antistatic material does not diminish significantly, and the antistatic property of matrix material is extremely unstable.Sample places air after 30 days, has lost antistatic property substantially.When sample is soaked 1h in water, its antistatic property greatly reduces, and after soaking 3h, it has lost antistatic property substantially.(Lu Changzheng such as Lu Changzheng, Deng. plastics, 2003,32 (5): 50) Shawinigan black is dispersed in makes conductive gelatin in the acrylic acid adhesive, again urethane foam is impregnated in the conductive gelatin take out after the roll-in repeatedly, drying, make the polyurethane foamed material that has improved electrical property, when the content of Shawinigan black in glue when 3% is increased to 4.5%, the volume specific resistance of foam sample is from 10
6Ω cm drops to 10
3Ω cm.
Though these present several approach can improve the conductivity of urethane foam to a certain extent, part all comes with some shortcomings.Carry out extensive and deep research for overcoming these not enough investigators, also obtained some achievements.In recent years, a kind of novel conductive filler material-carbon nanotube (CNTs) enjoys people to pay close attention to, and this is because carbon nanotube has characteristics such as length-to-diameter ratio is big, mechanical property good, electric property excellence.Charcoal nanofiber (Yang YL.et al.Advanced Materials has studied in U.S. Gupta seminar, 2005,17:1999) and carbon nanotube (Yang YL.et al.Nano Letters, 2005,5 (11): 2131) filled polystyrene foamy conductivity, find that the specific conductivity of polystyrene foam is from 1.0 * 10 when adding 5wt% charcoal fiber
-14S/m increases to 4.5 * 10
-4S/m; Add the 5wt% carbon nanotube and also can effectively improve the foamy conductivity.The applicant has prepared density 0.20-0.60g/cm
3The conductive polyurethane foam (Li Zhongming, stone is of heap of stone, Yang Mingbo. Chinese invention patent, application number: 2005100221170), and its structural form carried out deep research (LiZM et al.Small, 2007,3 (3): 408).But the conductive foam that is the former preparation of Gupta seminar or applicant all is the improvement at the rigid foam electric property.And many fields need have the soft conductive foam plastic of excellent electric property, and this just presses for a kind of method for preparing soft conductive foam plastic of exploitation, to widen the utilization field of conductive foam plastic.
Summary of the invention
To the widespread demand of light electric polyurethane foam plastic and the deficiency of improving flexible urethane foam electric property method at present, be difficult to be dispersed in forming effective conductive path, electrical property instability in the matrix, will reach antistatic or conduction requires the conductive filler material content of needs adding high at both at home and abroad as conductive filler material.The present invention adopts the carbon nanotube (CNTs) of excellent combination property, conductive filler material as flexible PU foam, utilize the planetary stirrer of design voluntarily and new surface modification technology and dispersing technology, the light electric polyurethane foam plastic of preparation good toughness, electric property excellence.
Body material of the present invention is the flexible PU foam of polyether glycol and vulcabond (both are the main raw material component), distilled water (for whipping agent), organotin and triethylene diamine compounds (both are composite catalyst) prepared in reaction.The performance perameter of reactant and auxiliary agent is as shown in table 1.
Raw material that table 1 the present invention is used and performance perameter thereof
| Material name | Main effect |
| Polyether glycol | Polymer monomers |
| Vulcabond | Polymer monomers |
| Triethylene diamine | Catalysts |
| Organotin | Catalysts |
| Distilled water | Whipping agent |
| Silicone oil | Suds-stabilizing agent |
The used conductive filler material of the present invention is multi-walled carbon nano-tubes and Single Walled Carbon Nanotube.The multi-walled carbon nano-tubes diameter is 5～40nm, and pipe range is 0.5～40 μ m.The Single Walled Carbon Nanotube caliber is 1～2nm, and pipe range is 50～100 μ m.
The inferior tin of the used organotin preferably octanoic acid of the present invention, this is because the catalytic activity of stannous octoate is higher than dibutyl tin laurate, and dibutyl tin laurate at high temperature (is higher than 140 ℃) and can accelerates the oxidative degradation of polyethers flex foam.
The method for preparing flexible urethane foam of the present invention, mainly adopted following technical measures to realize:
The method that carbon nano tube surface provided by the invention is handled mainly is meant and utilizes strong acid (as nitric acid, sulfuric acid etc.) and strong oxidizer (as potassium permanganate etc.) that carbon nanotube is carried out surface modification treatment, increases its surface polarity group number.
The dispersing method of CNTs provided by the invention, be meant mainly that in the presence of thinner (mainly being acetone, distilled water, dehydrated alcohol isopolarity non-active solvent) CNTs that utilizes homemade planetary stirrer to cooperate dispersion methods such as sonic oscillation, ultrasonication to handle is dispersed in the polyethers.
Mould therefor size of the present invention and shape are by goods size and shape decision, and mold material can be aluminium alloy, stainless steel etc.Have several spileholes at foaming direction mould, guarantee that the gas in the mould is discharged smoothly when foaming, its size is advisable not produce excessive overflow.
The concrete implementation step of the flexible urethane foam of the present invention's preparation is as follows:
(1) raw material weighing takes by weighing raw material and auxiliary agent (as shown in table 2) by prescription.
(2) the raw material drying polyethers 60～100 ℃ dry 6～24 hours down, and in moisture eliminator, cool off to prevent in air the moisture absorption once more.
(3) surface modification of carbon nanotube, and adopt non-activated thinner to reduce polyether viscosity.Carbon nanotube is adopted repeatedly oxidation modification, and the technology of adding thinner under sonic oscillation and planetary stirrer act on simultaneously stage by stage realizes the homodisperse of carbon nanotube.
(4) powerful mixing is catalyzer (organotin and triethylene diamine), suds-stabilizing agent (silicone oil), and whipping agent (distilled water) joins in the mixed solution of CNTs and polyether glycol, fully stirs with the high-power planet whipping appts of self-control, mixes.
(5) the polymerization foaming joins vulcabond rapidly in the blending ingredients, fully stirs simultaneously, produces as gas, when reactant begins to raise, mixture is poured in the mould rapid closing die cap.
(6) after later stage slaking foaming process finished, the mould that will be full of flexible PU foam was put into baking oven, solidified 3～5 hours down at 90～110 ℃.
(7) sample is taken out in the specimen preparation die sinking, removes the surface skining layer, obtains the light electric polyurethane foam plastic of carbon nanotubes.
The amount ranges of each component is as shown in table 2 in the present invention's prescription:
The amount ranges of each component of table 2
Annotate: realize the regulation and control of soft conductive foam plastic electric property by the content of regulating carbon nanotube.
Advantage of the present invention
(1) light electric polyurethane foam plastic of the present invention's preparation has remedied the deficiency for preparing the persistent soft conductive foam plastic of electrical property.
What (2) the present invention mainly prepared is light electric polyurethane foam plastic, and this material has the characteristics of good toughness, electric performance stablity.Suitable wrapping material as precise electronic device, high explosive etc., the electromagnetic shielding material of sophisticated weapons and electronic component and pressure transmitter etc.
(3) the present invention can prepare good toughness, conductivity excellence, and the low light electric polyurethane foam plastic of conductive filler material content.
(4) the soft conductive polyurethane bubble material plastics that make of the present invention, in use, electrical property is the variation with the prolongation of duration of service not, and human body, equipment and environment are safe from harm, and is a kind of environmental protection function material.
(5) the light electric polyurethane foam plastic material of the present invention's preparation has broad application prospects as static protective material, electromagnetic shielding material and sealed cell, pressure transmitter etc. in many fields such as electronic component, national defence, space flight.
Specific embodiment
Embodiment given below is to specific descriptions of the present invention, is necessary to be pointed out that at this following examples only are used for that the present invention is described further, can not be interpreted as limiting the scope of the invention.
Content of carbon nanotubes is that the prescription of embodiment 1～10 of the light electric polyurethane foam plastic of 0.5wt% sees Table 3
The prescription of table 3 embodiment 1～10
Annotate: what 1, embodiment 1～5 adopted is Single Walled Carbon Nanotube, and caliber is 1～2nm, and pipe range is 50～100 μ m.
What 2, embodiment 6～10 adopted is multi-walled carbon nano-tubes, and caliber is 5～40nm, and pipe range is 0.5～50 μ m.
3, embodiment 1 and 6 employed carbon nanotubes are handled through the vitriol oil and potassium permanganate mixed solution, embodiment 2 and 7 employed carbon nanotubes are handled through concentrated nitric acid and potassium permanganate mixed solution, embodiment 3 and 8 employed carbon nanotubes are handled through potassium permanganate, embodiment 4 and 9 employed carbon nanotubes are handled through the vitriol oil, and embodiment 5 and 10 employed carbon nanotubes are handled through concentrated nitric acid.
4, embodiment 3 and 4 used organotins are dibutyl tin laurate, and the used organotin of all the other embodiment is stannous octoate.
5, embodiment 1 and 2 is at 90 ℃ of following slaking 5h, and embodiment 3～6 is at 100 ℃ of following slaking 4h, and embodiment 7～10 is at 110 ℃ of following slaking 3h.
Content of carbon nanotubes is that the prescription of embodiment 11～20 of the light electric polyurethane foam plastic of 1.0wt% sees Table 4
The prescription of table 4 embodiment 11～20
Annotate: what 1, embodiment 11～15 adopted is Single Walled Carbon Nanotube, and caliber is 1～2nm, and pipe range is 50～100 μ m.
What 2, embodiment 16～20 adopted is multi-walled carbon nano-tubes, and caliber is 5～40nm, and pipe range is 0.5～50 μ m.
3, embodiment 11 and 16 employed carbon nanotubes are handled through the vitriol oil and potassium permanganate mixed solution, embodiment 12 and 17 employed carbon nanotubes are handled through concentrated nitric acid and potassium permanganate mixed solution, embodiment 13 and 18 employed carbon nanotubes are handled through potassium permanganate, embodiment 14 and 19 employed carbon nanotubes are handled through the vitriol oil, and embodiment 15 and 20 employed carbon nanotubes are handled through concentrated nitric acid.
4, embodiment 13 and 14 used organotins are dibutyl tin laurate, and the used organotin of all the other embodiment is stannous octoate.
5, embodiment 11 and 12 is at 90 ℃ of following slaking 5h, and embodiment 13～16 is at 100 ℃ of following slaking 4h, and embodiment 17～20 is at 110 ℃ of following slaking 3h.
Content of carbon nanotubes is that the prescription of embodiment 21～30 of the light electric polyurethane foam plastic of 2.0wt% sees Table 5
The prescription of table 5 embodiment 21～30
| 24 | 100 | 18 | 2.40 | 0.2 | 0.15 | 0.8 | 2.5 |
| 25 | 100 | 20 | 2.44 | 0.3 | 0.2 | 1.0 | 3 |
| 26 | 100 | 12.5 | 2.30 | 0.05 | 0.05 | 0.3 | 1 |
| 27 | 100 | 13.5 | 2.31 | 0.05 | 0.0.5 | 0.4 | 1.5 |
| 28 | 100 | 15 | 2.34 | 0.1 | 0.1 | 0.5 | 2 |
| 29 | 100 | 18 | 2.40 | 0.2 | 0.15 | 0.8 | 2.5 |
| 30 | 100 | 20 | 2.44 | 0.3 | 0.2 | 1.0 | 3 |
Annotate: what 1, embodiment 21～25 adopted is Single Walled Carbon Nanotube, and caliber is 1～2nm, and pipe range is 50～100 μ m.
What 2, embodiment 26～30 adopted is multi-walled carbon nano-tubes, and caliber is 5～40nm, and pipe range is 0.5～50 μ m.
3, embodiment 21 and 26 employed carbon nanotubes are handled through the vitriol oil and potassium permanganate mixed solution, embodiment 22 and 27 employed carbon nanotubes are handled through concentrated nitric acid and potassium permanganate mixed solution, embodiment 23 and 28 employed carbon nanotubes are handled through potassium permanganate, embodiment 24 and 29 employed carbon nanotubes are handled through the vitriol oil, and embodiment 25 and 30 employed carbon nanotubes are handled through concentrated nitric acid.
4, embodiment 23 and 24 used organotins are dibutyl tin laurate, and the used organotin of all the other embodiment is stannous octoate.
5, embodiment 21 and 22 is at 90 ℃ of following slaking 5h, and embodiment 23～26 is at 100 ℃ of following slaking 4h, and embodiment 27～30 is at 110 ℃ of following slaking 3h.
Be the electric property of the light electric polyurethane foam plastic of investigating the present invention's preparation, with the porous plastics of preparation by its electric property of following standard testing:
Volume specific resistance: sample is processed into 100 * 10 * 5mm
3Batten, test by ASTM D-991.Test result sees Table 6.
The volume specific resistance of table 6 light electric polyurethane foam plastic
| Description of materials | Volume specific resistance (Ω cm) |
| |
2.6×10 7 |
| Embodiment 2 | 3.6×10 7 |
| |
3.9×10 7 |
| Embodiment 4 | 4.4×10 7 |
| Embodiment 5 | 5.3×10 7 |
| Embodiment 6 | 6.2×10 7 |
| Embodiment 7 | 6.3×10 7 |
| Embodiment 8 | 7.6×10 7 |
| Embodiment 9 | 7.8×10 7 |
| Embodiment 10 | 8.9×10 7 |
| Embodiment 11 | 2.8×10 6 |
| Embodiment 12 | 3.9×10 6 |
| Embodiment 13 | 4.3×10 5 |
| Embodiment 14 | 4.8×10 6 |
| Embodiment 15 | 5.7×10 6 |
| Embodiment 16 | 5.5×10 6 |
| Embodiment 17 | 6.7×10 6 |
| Embodiment 18 | 7.2×10 6 |
| Embodiment 19 | 8.3×10 6 |
| Embodiment 20 | 8.5×10 6 |
| Embodiment 21 | 8.3×10 3 |
| Embodiment 22 | 1.8×10 4 |
| Embodiment 23 | 2.6×10 4 |
| Embodiment 24 | 3.7×10 4 |
| Embodiment 25 | 4.1×10 4 |
| Embodiment 26 | 5.2×10 4 |
| Embodiment 27 | 5.7×10 4 |
| Embodiment 28 | 6.6×10 4 |
| Embodiment 29 | 6.9×10 4 |
| Embodiment 30 | 8.2×10 4 |
For the microscopic pattern of the light electric polyurethane foam plastic of research the present invention preparation, with porous plastics brittle failure in liquid nitrogen of preparation, and observe its form with scanning electronic microscope (JSM-9600, Japanese JEOL company), wherein acceleration voltage is 20KV.
Fig. 1 is the low power electron scanning micrograph of embodiment 6 gained light electric polyurethane foam plastics; Fig. 2 is the high power electron scanning micrograph of embodiment 6 gained light electric polyurethane foam plastics; Fig. 3 is the low power electron scanning micrograph of embodiment 16 gained light electric polyurethane foam plastics; Fig. 4 is the high power electron scanning micrograph of embodiment 16 gained light electric polyurethane foam plastics; Fig. 5 is embodiment 26 gained light electric polyurethane foam plastic low power electron scanning micrographs.Fig. 6 embodiment 26 gained light electric polyurethane foam plastic high power electron scanning micrographs.
Claims (9)
1. light electric polyurethane foam plastic, this porous plastics comprises 100 parts of polyether glycols and 12.5～25 parts of vulcabond, 0.3～1 part of distilled water, 0.05～0.3 part of stannous octoate, 0.05～0.2 part of triethylene diamine compounds, 1～3 part of silicone oil, and 0.56～2.5 part of carbon nanotube.
2. a kind of light electric polyurethane foam plastic according to claim 1 is characterized in that described carbon nanotube is a Single Walled Carbon Nanotube, and caliber is 1～2nm, and pipe range is 50～100 μ m.
3. a kind of light electric polyurethane foam plastic according to claim 1 is characterized in that described carbon nanotube is a multi-walled carbon nano-tubes, and diameter is 5～40nm, and pipe range is 0.5～40 μ m.
4. a kind of light electric polyurethane foam plastic according to claim 1 is characterized in that described organotin is stannous octoate or dibutyl tin laurate.
5. method for preparing light electric polyurethane foam plastic as claimed in claim 1, this method comprises the following steps:
A, with polyether glycol 60～80 ℃ dry 6～24 hours down, postcooling to 25～30 ℃ then;
B, dilute polyether glycol with thinner;
C, carbon nanotube is carried out surface modification by strong oxidizer;
D, the even carbon nanotube that step C is obtained are dispersed in the polyether glycol that contains thinner;
Thinner in the mixed solution that E, removal step D are obtained;
F, organotin and triethylene diamine and distilled water are joined in the said mixture, mix;
G, vulcabond is joined in the above-mentioned blending ingredients, and be poured in the mould after fully stirring;
H, mould and wherein mixture are together put into baking oven, solidified 3-5 hour down at 90～110 ℃.
6. a kind of method for preparing light electric polyurethane foam plastic according to claim 5,
It is characterized in that step D is under sonic oscillation and powerful mechanical stirring acting in conjunction, is dispersed in processed carbon nanotubes in the polyether glycol.
7. a kind of method for preparing light electric polyurethane foam plastic according to claim 5 is characterized in that the used thinner of step B is the polarity non-active solvent of boiling point below used polyether glycol boiling point.
8. a kind of method for preparing light electric polyurethane foam plastic according to claim 5, it is characterized in that step e remove the method for thinner be with carbon nano-tube/poly ethoxylated polyhydric alcohol mixture heating up near the boiling point of thinner, by the method that vacuumizes thinner is removed.
9. a kind of method for preparing light electric polyurethane foam plastic according to claim 5 is characterized in that step C is the mixed solution of the vitriol oil and potassium permanganate to the used strong oxidizer of the surface modification of carbon nanotube.
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