CN104448872B - Conductive/antistatic wood-plastic composite material and preparation method thereof - Google Patents
Conductive/antistatic wood-plastic composite material and preparation method thereof Download PDFInfo
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- CN104448872B CN104448872B CN201410723764.3A CN201410723764A CN104448872B CN 104448872 B CN104448872 B CN 104448872B CN 201410723764 A CN201410723764 A CN 201410723764A CN 104448872 B CN104448872 B CN 104448872B
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Abstract
The invention discloses a conductive/antistatic wood-plastic composite material and a preparation method thereof, relates to the field of wood-plastic composite materials and particularly relates to the conductive/antistatic wood-plastic composite material and the preparation method thereof. The conductive/antistatic wood-plastic composite material is used for solving the problems of poor antistatic property and low comprehensive property of the existing wood-plastic composite material. The conductive/antistatic wood-plastic composite material is prepared from wood powder, high-density polyethylene, an additive and low-addition high-conductivity carbon nanotubes. The preparation method comprises the following steps: weighing the raw materials, carrying out blending extrusion and hot pressing, cooling and molding to obtain the conductive/antistatic wood-plastic composite material. By the preparation method, on the premise that mechanical properties of the wood-plastic composite material are not decreased, the conductive and antistatic properties of the wood-plastic composite material are increased so as to meet the application requirement of the wood-plastic composite material in various harsh conditions, such as manufacturing of anti-static dust-proof floors of a large-sized machine room.
Description
Technical field
The present invention relates to wood plastic composite field, and in particular to a kind of conduction/antistatic wood plastic composite and its system
Preparation Method.
Background technology
Wood plastic composite is all to be devoted to a kind of new environment-friendly composite material of exploitation in worldwide, due to tool
There are little part degradability, environmental pollution, low cost, little water imbibition, good mechanical performance, creep resistant, anti-aging, dimensionally stable
The advantages of property is good, so wood plastic composite has obtained extensive attention.At present, range of application has penetrated into multiple fields,
Application that is such as dust-proof under harsh conditions, being dried easily generation fire field, its antistatic property becomes one of important factor.
Because wood plastic composite is based on plastics, therefore to be provided with the insulation characterisitic of plastics, in use due to friction
Electrostatic accumulation is produced etc. reason, electrostatic spark is produced, can be set off an explosion when serious, therefore traditional wood plastic composite is carried out
Its antistatic property that improves is just particularly significant.
At present, domestic conduction/antistatic wood plastic composite is studied and mainly adds conductive materials wherein, but
While addition conducting medium improves electric conductivity, mechanical properties decrease, therefore the development master of conduction/antistatic wood plastic composite
Concentrate on two aspects of combination property for reducing resistivity with improving material.
The content of the invention
The present invention is to solve the existing problem that wood plastic composite antistatic property is poor, combination property is low, and provide
A kind of conduction/antistatic wood plastic composite and preparation method thereof.
One kind conduction/antistatic wood plastic composite of the invention by weight by 50～70 parts of wood powders, 20～50 parts high
Density polyethylene, 3～10 parts of additives and 1～10 part of CNT are made；The moisture content of the wood powder is 10%～15%；Institute
Additive is stated for PE waxes and the mixture of maleic anhydride.
A kind of preparation method of conduction/antistatic wood plastic composite is to carry out according to the following steps：
First, weigh by weight 50～70 parts of wood powders, 20～50 parts of high density polyethylene (HDPE)s, 3～10 parts of additives and 1～
10 parts of CNTs；The moisture content of the wood powder is 10%～15%；The additive is the mixture of PE waxes and maleic anhydride；
2nd, 50～70 parts of wood powders that step one is weighed are poured in high-speed mixer, with 1200r/min～1600r/min
Speed be stirred, after temperature is from room temperature to 100 DEG C～120 DEG C, by speed from 1200r/min～1600r/min
After being down to 600r/min～800r/min, it is 5% to stir to the moisture content of wood powder, then 20～50 parts that step one is weighed are highly dense
Degree polyethylene, 3～10 parts of additives and 1～10 part of CNT are added in high-speed mixer and are mixed, and obtain mixture,
Mixture is transferred in low speed cooling mixer after 10min～15min, by the temperature of mixture from 100 DEG C～120 DEG C coolings
To after 40 DEG C～45 DEG C, material is obtained；
3rd, the material that step 2 is obtained is poured in double screw extruder, is extruded, obtain pellet；
4th, the pellet that step 3 is obtained is put in hot press after compacting, cooling forming obtains conduction/antistatic wood moulding
Composite.
Beneficial effects of the present invention：
The present invention can in the base form continuous conductive path or network by addition CNT, so as to improve
The electric conductivity of material, the conduction for preparing/antistatic surface of wood-plastic composite material resistance is reduced to 4 × 104Ω, effectively
Improve the antistatic surface performance of material, and its good mechanical properties.
Specific embodiment
Specific embodiment one：Present embodiment one kind conduction/antistatic wood plastic composite by weight by 50～
70 parts of wood powders, 20～50 parts of high density polyethylene (HDPE)s, 3～10 parts of additives and 1～10 part of CNT are made；The wood powder contains
Water rate is 10%～15%；The additive is the mixture of PE waxes and maleic anhydride, is mixed by any ratio when being mixture.
Specific embodiment two：Present embodiment from unlike specific embodiment one：The CNT is many walls
CNT, a diameter of 20～100nm, length is 10～50 μm.Other are identical with specific embodiment one.
Specific embodiment three：Present embodiment from unlike specific embodiment one or two：By weight by 60
Part wood powder, 40 parts of high density polyethylene (HDPE)s, 3 parts of additives and 2 parts of CNTs are made.Other and specific embodiment one or two-phase
Together.
Specific embodiment four：Unlike one of present embodiment and specific embodiment one to three：By weight
It is made up of 60 parts of wood powders, 40 parts of high density polyethylene (HDPE)s, 3 parts of additives and 5 parts of CNTs.Other with specific embodiment one to
One of three is identical.
Specific embodiment five：Unlike one of present embodiment and specific embodiment one to four：By weight
It is made up of 60 parts of wood powders, 40 parts of high density polyethylene (HDPE)s, 3 parts of additives and 8 parts of CNTs.Other with specific embodiment one to
One of four is identical.
Specific embodiment six：A kind of preparation method of conduction/antistatic wood plastic composite of present embodiment be by with
Lower step is carried out：
First, weigh by weight 50～70 parts of wood powders, 20～50 parts of high density polyethylene (HDPE)s, 3～10 parts of additives and 1～
10 parts of CNTs；The moisture content of the wood powder is 10%～15%；The additive is the mixture of PE waxes and maleic anhydride,
For mixture when be mixed by any ratio；
2nd, 50～70 parts of wood powders that step one is weighed are poured in high-speed mixer, with 1200r/min～1600r/min
Speed be stirred, after temperature is from room temperature to 100 DEG C～120 DEG C, by speed from 1200r/min～1600r/min
After being down to 600r/min～800r/min, it is 5% to stir to the moisture content of wood powder, then 20～50 parts that step one is weighed are highly dense
Degree polyethylene, 3～10 parts of additives and 1～10 part of CNT are added in high-speed mixer and are mixed, and obtain mixture,
Mixture is transferred in low speed cooling mixer after 10min～15min, by the temperature of mixture from 100 DEG C～120 DEG C coolings
To after 40 DEG C～45 DEG C, material is obtained；
3rd, the material that step 2 is obtained is poured in double screw extruder, is extruded, obtain pellet；
4th, the pellet that step 3 is obtained is put in hot press after compacting, cooling forming obtains conduction/antistatic wood moulding
Composite.
Specific embodiment seven：Present embodiment from unlike specific embodiment six：Carbon nanometer described in step one
Manage as multi-walled carbon nano-tubes, a diameter of 20～100nm, length is 10～50 μm.Other are identical with specific embodiment six.
Specific embodiment eight：Present embodiment from unlike specific embodiment six or seven：Work as temperature in step 2
From room temperature to after 105 DEG C.Other are identical with specific embodiment six or seven.
The effect of the present invention is verified by following examples：
Embodiment one：A kind of preparation method of conduction/antistatic wood plastic composite is to carry out according to the following steps：
First, 60 parts of Poplar Powders, 40 parts of high density polyethylene (HDPE)s, 4 parts of additives and 5 parts of CNTs are weighed by weight；
The moisture content of the wood powder is 10%～15%；The additive is the mixture of PE waxes and maleic anhydride；
2nd, 60 parts of Poplar Powders that step one is weighed are poured in high-speed mixer, with 1200r/min～1600r/min's
Speed is stirred, and after temperature is from room temperature to 105 DEG C, speed is down to into 600r/ from 1200r/min～1600r/min
After min～800r/min, stir to wood powder moisture content be 5%, then step one is weighed 40 parts of high density polyethylene (HDPE)s, 4 parts
Additive and 5 parts of CNTs are added in high-speed mixer and are mixed, and obtain mixture, will mixing after 10min～15min
Thing is transferred in low speed cooling mixer, after the temperature of mixture is cooled to into 45 DEG C from 105 DEG C, obtains material；
3rd, the material that step 2 is obtained is poured in double screw extruder, is extruded, obtain pellet；
4th, the pellet that step 3 is obtained is put in hot press after compacting, cooling forming obtains conduction/antistatic wood moulding
Composite；CNT described in step one is multi-walled carbon nano-tubes, and a diameter of 20～100nm, length is 10～50 μm.
Embodiment two：The present embodiment is a difference in that with embodiment one：Weigh 60 parts of poplars in step one by weight
Powder, 40 parts of high density polyethylene (HDPE)s, 4 parts of additives and 2 parts of CNTs；40 parts of high density for again weighing step one in step 2
Polyethylene, 4 parts of additives and 2 parts of CNTs are added in high-speed mixer and are mixed.Other are identical with embodiment one.
Embodiment three：The present embodiment is a difference in that with embodiment one or two：Weigh 60 parts in step one by weight
Poplar Powder, 40 parts of high density polyethylene (HDPE)s, 4 parts of additives and 8 parts of CNTs；Again weigh step one in step 2 40 parts high
Density polyethylene, 4 parts of additives and 8 parts of CNTs are added in high-speed mixer and are mixed.Other with embodiment one or
Two is identical.
Comparative example：One of the present embodiment and embodiment one to three are a difference in that：Claim by weight in step one
Take 60 parts of Poplar Powders, 40 parts of high density polyethylene (HDPE)s and 4 parts of additives；In step 2 40 parts of high density that step one is weighed are gathered again
Ethene and 4 parts of additives are added in high-speed mixer and are mixed.Other are identical with one of embodiment one to three.
Work is pressed to the surface resistivity of the product obtained by embodiment one, embodiment two, embodiment three and comparative example
IEC60093 requires to be tested, and impact property is tested by the requirement of work ISO180-93, and bending property will by ISO178-93
Ask and tested (condition is 2mm/min), test result is as shown in table 1.
The surface resistivity of the product obtained by the embodiment one of table 1, embodiment two, embodiment three and comparative example, impact
Performance and bending property are contrasted
As can be seen from Table 1 the present invention just can in the base be formed by a small amount of 2% CNT of addition and continuously led
Electric pathway or network, so as to improve the electric conductivity of material, the conduction for preparing/antistatic surface of wood-plastic composite material electricity
Resistance rate is minimum to drop to 4 × 104Ω, is effectively improved the antistatic surface performance of material, and elastic modelling quantity, bending strength
Deng good mechanical properties.
Claims (1)
1. a kind of preparation method of conduction/antistatic wood plastic composite, it is characterised in that conduction/antistatic wood plastic composite
Preparation method be to carry out according to the following steps：
First, 60 parts of Poplar Powders, 40 parts of high density polyethylene (HDPE)s, 4 parts of additives and 5 parts of CNTs are weighed by weight；It is described
The moisture content of wood powder is 10%～15%；The additive is the mixture of PE waxes and maleic anhydride；
2nd, 60 parts of Poplar Powders that step one is weighed are poured in high-speed mixer, with the speed of 1200r/min～1600r/min
Be stirred, after temperature is from room temperature to 105 DEG C, by speed from 1200r/min～1600r/min be down to 600r/min～
After 800r/min, it is 5% to stir to the moisture content of wood powder, then 40 parts of high density polyethylene (HDPE)s, the 4 parts of additives that step one is weighed
It is added in high-speed mixer with 5 parts of CNTs and is mixed, obtain mixture, shifts in mixture after 10min～15min
Into low speed cooling mixer, after the temperature of mixture is cooled to into 45 DEG C from 105 DEG C, material is obtained；
3rd, the material that step 2 is obtained is poured in double screw extruder, is extruded, obtain pellet；
4th, the pellet that step 3 is obtained is put in hot press after compacting, cooling forming obtains conduction/antistatic wood plastics composite
Material；CNT described in step one is multi-walled carbon nano-tubes, and a diameter of 20～100nm, length is 10～50 μm；It is described to lead
The impact strength of electricity/antistatic wood plastic composite is 6.55KJ/m2, bending strength be that 35.29MPa, elastic modelling quantity are
2.34GPa, surface resistivity are 4 × 104Ω。
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| CN106118110B (en) * | 2016-07-22 | 2018-11-13 | 东北林业大学 | A kind of polyolefin-based wood plastic composite of nonisulated heat conduction |
| CN107652555A (en) * | 2017-09-11 | 2018-02-02 | 广东圆融新材料有限公司 | A kind of low smell and dust-proof vehicle inside decoration polypropene composition and preparation method thereof |
| CN108841188A (en) * | 2018-06-07 | 2018-11-20 | 江苏肯帝亚木业有限公司 | A kind of wood plastic composite and preparation method thereof using carbon nano-fiber increased thermal conductivity energy |
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| CN101384426A (en) * | 2006-02-09 | 2009-03-11 | 上游技术革新有限公司 | Polymeric materials incorporating carbon nanostructures and methods for making same |
| CN102140255B (en) * | 2011-04-14 | 2012-08-08 | 浙江工商大学 | Hot-press type wood plastic composite for toy and preparation method thereof |
| CN103254653B (en) * | 2013-05-27 | 2015-09-16 | 东北林业大学 | Basalt fibre strengthens wood plastic composite and preparation method thereof |
| CN103554950B (en) * | 2013-10-25 | 2017-01-11 | 东北林业大学 | Flame-retardant antistatic wood powder/polypropylene wood-plastic composite material with silane modified conductive carbon black, and preparation method of composite material |
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| Effects of multi-walled carbon nanotubes on the physical and mechanical properties of high-density polyethylene/wood flour nanocomposites;Mohammad Farsi等;《Journal of Thermoplastic Composite Materials》;20140710;第27卷(第8期);第1144页表1第6组，第1143页第2段 * |
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