CN103832042A - Carbon fiber cloth reinforced type wood-plastic composite material and preparation method thereof - Google Patents
Carbon fiber cloth reinforced type wood-plastic composite material and preparation method thereof Download PDFInfo
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- CN103832042A CN103832042A CN201410105201.8A CN201410105201A CN103832042A CN 103832042 A CN103832042 A CN 103832042A CN 201410105201 A CN201410105201 A CN 201410105201A CN 103832042 A CN103832042 A CN 103832042A
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Abstract
The invention relates to a carbon fiber cloth reinforced type wood-plastic composite material and a preparation method thereof, and aims to solve the problems of low comprehensive mechanical property, particularly low impact toughness, of an existing wood-plastic composite material. The carbon fiber cloth reinforced type wood-plastic composite material consists of two surface wood-plastic layers, two carbon cloth reinforcement layers and a core wood-plastic layer. The preparation method comprises the following steps: (1) preparing a single wood-plastic composite plate; (2) treating carbon cloth, namely passivating the surface of the carbon cloth; (3) preparing the carbon fiber cloth reinforced type wood-plastic composite material, namely sequentially stacking and assembling a surface wood-plastic plate, the reinforced carbon cloth, a core wood-plastic plate, another reinforced carbon cloth and a surface wood-plastic plate with the corresponding thicknesses according to the performance requirements of the carbon fiber cloth reinforced type wood-plastic composite material, hot-pressing for 3-15min, cooling and finishing. According to the method, the toughness of the wood-plastic composite material is remarkably improved. The carbon fiber cloth reinforced type wood-plastic composite material can be applied to the field of high-performance structures and engineering materials.
Description
Technical field
The present invention relates to a kind of carbon cloth and strengthen wood plastic composite and preparation method thereof.
Background technology
Wood plastic composite (wood plastic composites is called for short WPC) is a kind of new material that a certain proportion of wood-fibred warp and thermoplastic polymer or other materials are combined into.Due to adding of plastics, increase case hardness, dimensional stability, resistance to water, the corrosion resistance of timber, and generally do not needed top finishing, meet the needs of economic development, its future is inestimable.
Just because of the many merits of wood plastic composite, make the very fast of its market growth, particularly the application aspect building and automobile.And on the other hand, the market of expansion is applied widely and has been proposed higher performance requirement for wood plastic composite again rapidly.Such as, when it is applied in the field such as structure and engineering material, must there is higher comprehensive mechanical property.
Wood plastic composite also existent defect in having plurality of advantages, wherein more outstanding shortcoming is that poor toughness and intensity are not high, is especially difficult to acquisition and has simultaneously the product of high strength and high tenacity.Therefore, how to improve intensity and the toughness of wood plastic composite simultaneously, become the key of wood plastic composite expansion range of application.
Prior art conducts extensive research for this reason, for example: many coupling agents (or compatilizer) are used to improve stretching and the bending strength of wood plastic composite as maleic anhydride stem grafting polyolefin, silane, isocyanates etc., but the impact flexibility of wood plastic composite does not improve and even decreasing; Adding of the thermoplastic elastomer (TPE)s such as butadiene-styrene rubber (SBR), SEBS, EPDM, EOR, EMA, EBAGMA, EPR-g-MA, the impact flexibility of wood plastic composite is more or less improved, but its strength and modulus often reduce; The foaming technique of wood plastic composite can significantly improve its toughness and shock resistance, but foaming causes rigidity, intensity and the croop property of material poor, has seriously limited its application; In wood plastic composite, add glass fibre, can improve intensity and the toughness of wood plastic composite simultaneously, but use glass fibre to affect health of human body in production process, and glass density is up to 2.5g/cm3, be unfavorable for obtaining high-strength light product, also very serious to the wearing and tearing of extrusion equipment.
The excellent specific property such as that carbon fiber has is lightweight, specific strength is large, modulus is high, heat resistance is high, chemical stability is good, stronger than steel, lighter than aluminium characteristic that the composite take carbon fiber as wild phase has, is one one of the most valued high performance material at present.It has been widely used aspect many at Aero-Space, military affairs, industry, sports equipment etc.
Summary of the invention
The object of the invention is comprehensive mechanical property in order to solve existing wood plastic composite low, the problem that impact flexibility is low, and provide a kind of carbon cloth to strengthen wood plastic composite and preparation method thereof.
A kind of carbon cloth of the present invention strengthen wood plastic composite be by top layer wood mould layer, strengthen carbon cloth layer, sandwich layer wood is moulded layer, strengthen carbon cloth layer and top layer wood moulds layer hot pressing and form.
A kind of carbon cloth of the present invention strengthens the preparation method of wood plastic composite, carries out according to following steps:
One, wood is moulded the preparation of compound veneer;
Two, the fine preparation that strengthens wood plastic composite of carbon: according to the fine performance requirement that strengthens wood plastic composite of carbon, successively the top layer wood of respective thickness moulded to plate, strengthened that carbon cloth, sandwich layer wood are moulded plate, strengthened carbon cloth, top layer wood is moulded plate and stacked assembly, then put into hot press with the temperature hot pressing 3～15min of 170～190 ℃, be cooled to again below 60 degree, obtain carbon cloth and strengthen wood plastic composite, complete; Wherein said performance requirement is bending strength, elastic modelling quantity, hot strength or elongation at break;
If desired the fine bending strength that strengthens wood plastic composite of carbon is 30～100Mpa, successively 0～3mm top layer wood is moulded to plate, is strengthened carbon cloth, 1～7mm sandwich layer wood is moulded plate, strengthen carbon cloth and 0～3mm top layer wood moulds plate and stack assembly;
If desired the fine elastic modelling quantity that strengthens wood plastic composite of carbon is 1.5～4.5Gpa, successively 1～3mm top layer wood is moulded to plate, is strengthened carbon cloth, 1～7mm sandwich layer wood is moulded plate, strengthen carbon cloth and 1～3mm top layer wood moulds plate and stack assembly;
If desired the fine hot strength that strengthens wood plastic composite of carbon is 20～70Mpa, successively 1～3mm top layer wood is moulded to plate, is strengthened carbon cloth, 1～7mm sandwich layer wood is moulded plate, strengthen carbon cloth and 1～3mm top layer wood moulds plate and stack assembly;
If desired the fine elongation at break that strengthens wood plastic composite of carbon is 10～17%, successively 1～3mm top layer wood is moulded to plate, is strengthened carbon cloth, 1～7mm sandwich layer wood is moulded plate, strengthen carbon cloth and 1～3mm top layer wood moulds plate and stack assembly;
If desired the fine impact strength that strengthens wood plastic composite of carbon is 20～60Mpa, successively 1～3mm top layer wood is moulded to plate, is strengthened carbon cloth, 1～7mm sandwich layer wood is moulded plate, strengthen carbon cloth and 1～3mm top layer wood moulds plate and stack assembly;
Its mesexine wood is moulded plate and sandwich layer wood, and to mould plate be that wood prepared by step 1 is moulded compound veneer, and the thickness that strengthens carbon cloth is 0.01～0.2mm, and strengthening carbon cloth is that monolayer carbon fiber cloth, single-layer glass fiber cloth or single layer fibre strengthen polymer.
Adding of carbon cloth of the present invention significantly improved the every mechanical property of wood plastic composite.Compared with not adding the Wood-plastic material of carbon cloth, bending strength strengthens and has improved 1 times; Elastic modelling quantity has improved 0.5 times; Hot strength has improved 2 times, and tensile property strengthens effect highly significant; Elongation at break height 1.5 times; Impact strength maximum has improved more than 4 times, has significantly reduced the fragility of wood plastic composite, has strengthened toughness.
The inventive method has also solved following problem:
1, solved dispersed problem.Carbon fiber addition is few, is difficult in matrix material dispersedly, adopts carbon cloth as the enhancement layer of large-breadth plates by using, and compared with using short fiber, fiber is evenly distributed, and has kept long fine form, strengthens effective.
2, take hierarchical composite, control the measure such as heat pressing process, make top layer fusing meet the bonding needs of carbon cloth, and sandwich layer is without being subject to thermal softening, reduces hot pressing time, greatly reduced surperficial wood and mould the harm of pyrolysis, in strengthening, guarantee that plate face is attractive in appearance.
3, utilize heat pressing process and expressing technique to prepare large format Wood plastic boards, be convenient to on-the-spot processing and post forming, meet shaped piece, parts and the real requirement such as cut apart.
Accompanying drawing explanation
Fig. 1 is the structural representation that carbon cloth of the present invention strengthens wood plastic composite, wherein a be top layer wood mould layer, b for strengthen carbon cloth layer, c be sandwich layer wood mould layer, d for strengthening carbon cloth layer, e is that top layer wood is moulded layer;
Fig. 2 is the structural representation of CF1 material in test 1, wherein a be top layer wood mould layer, b for strengthen carbon cloth layer, c be sandwich layer wood mould layer, d for strengthening carbon cloth layer, e is that top layer wood is moulded layer;
Fig. 3 is the structural representation of CF3 material in test 1, wherein a be top layer wood mould layer, b for strengthen carbon cloth layer, c be sandwich layer wood mould layer, d for strengthening carbon cloth layer, e is that top layer wood is moulded layer;
Fig. 4 is the structural representation of CF5 material in test 1, wherein a be top layer wood mould layer, b for strengthen carbon cloth layer, c be sandwich layer wood mould layer, d for strengthening carbon cloth layer, e is that top layer wood is moulded layer;
Fig. 5 is the structural representation of CF7 material in test 1, and wherein a is that enhancing carbon cloth layer, b are that sandwich layer wood is moulded layer, c for strengthening carbon cloth layer.
The specific embodiment:
The specific embodiment one: a kind of carbon cloth of present embodiment strengthen wood plastic composite be by top layer wood mould layer, strengthen carbon cloth layer, sandwich layer wood is moulded layer, strengthen carbon cloth layer and top layer wood moulds layer hot pressing and form.
Adding of present embodiment carbon cloth significantly improved the every mechanical property of wood plastic composite.Compared with not adding the Wood-plastic material of carbon cloth, bending strength strengthens and has improved 1 times; Elastic modelling quantity has improved 0.5 times; Hot strength has improved 2 times, and tensile property strengthens effect highly significant; Elongation at break height 1.5 times; Impact strength maximum has improved more than 4 times, has significantly reduced the fragility of wood plastic composite, has strengthened toughness.
The specific embodiment two: a kind of carbon cloth of present embodiment strengthens the preparation method of wood plastic composite, carries out according to following steps:
One, wood is moulded the preparation of compound veneer;
Two, the fine preparation that strengthens wood plastic composite of carbon: according to the fine performance requirement that strengthens wood plastic composite of carbon, successively the top layer wood of respective thickness moulded to plate, strengthened that carbon cloth, sandwich layer wood are moulded plate, strengthened carbon cloth, top layer wood is moulded plate and stacked assembly, then put into hot press with the temperature hot pressing 3～15min of 170～190 ℃, be cooled to again below 60 degree, obtain carbon cloth and strengthen wood plastic composite, complete; Wherein said performance requirement is bending strength, elastic modelling quantity, hot strength or elongation at break;
If desired the fine bending strength that strengthens wood plastic composite of carbon is 30～100Mpa, successively 0～3mm top layer wood is moulded to plate, is strengthened carbon cloth, 1～7mm sandwich layer wood is moulded plate, strengthen carbon cloth and 0～3mm top layer wood moulds plate and stack assembly;
If desired the fine elastic modelling quantity that strengthens wood plastic composite of carbon is 1.5～4.5Gpa, successively 1～3mm top layer wood is moulded to plate, is strengthened carbon cloth, 1～7mm sandwich layer wood is moulded plate, strengthen carbon cloth and 1～3mm top layer wood moulds plate and stack assembly;
If desired the fine hot strength that strengthens wood plastic composite of carbon is 20～70Mpa, successively 1～3mm top layer wood is moulded to plate, is strengthened carbon cloth, 1～7mm sandwich layer wood is moulded plate, strengthen carbon cloth and 1～3mm top layer wood moulds plate and stack assembly;
If desired the fine elongation at break that strengthens wood plastic composite of carbon is 10～17%, successively 1～3mm top layer wood is moulded to plate, is strengthened carbon cloth, 1～7mm sandwich layer wood is moulded plate, strengthen carbon cloth and 1～3mm top layer wood moulds plate and stack assembly;
If desired the fine impact strength that strengthens wood plastic composite of carbon is 20～60Mpa, successively 1～3mm top layer wood is moulded to plate, is strengthened carbon cloth, 1～7mm sandwich layer wood is moulded plate, strengthen carbon cloth and 1～3mm top layer wood moulds plate and stack assembly;
Its mesexine wood is moulded plate and sandwich layer wood, and to mould plate be that wood prepared by step 1 is moulded compound veneer, and the thickness that strengthens carbon cloth is 0.01～0.2mm, and strengthening carbon cloth is that monolayer carbon fiber cloth, single-layer glass fiber cloth or single layer fibre strengthen polymer.
Present embodiment has also solved following problem:
1, solved dispersed problem.Carbon fiber addition is few, is difficult in matrix material dispersedly, adopts carbon cloth as the enhancement layer of large-breadth plates by using, and compared with using short fiber, fiber is evenly distributed, and has kept long fine form, strengthens effective.
2, take hierarchical composite, control the measure such as heat pressing process, make top layer fusing meet the bonding needs of carbon cloth, and sandwich layer is without being subject to thermal softening, reduces hot pressing time, greatly reduced surperficial wood and mould the harm of pyrolysis, in strengthening, guarantee that plate face is attractive in appearance.
3, utilize heat pressing process and expressing technique to prepare large format Wood plastic boards, be convenient to on-the-spot processing and post forming, meet shaped piece, parts and the real requirement such as cut apart.
The specific embodiment three: present embodiment is different from the specific embodiment two: the preparation method that the wood described in step 1 is moulded veneer is: one, granulation: by biomass fiber, thermoplastic material and coupling agent in mass ratio the ratio of 1:0.6:0.07 in high-speed mixer, mix 10min, then use double screw extruder granulation, obtain the pellet of hot-pressed board; Two, prepare wood and mould compound veneer: the pellet in step 1 is dressed up to the slab that thickness is 1～10mm thickness at airtight steel die middle berth, then slab is put into hot press with the temperature hot pressing 3～15min of 170～190 ℃, obtain wood after cooling to mould compound veneer; Wherein thermoplastic material is thermoplastic powder or thermoplastic fiber; Thermoplastic is polyethylene, polypropylene or igelite; Coupling agent is maleic anhydride inoculated polypropylene, maleic anhydride grafted polyethylene or silane coupler.Other is identical with the specific embodiment two.
The specific embodiment four: present embodiment is different from the specific embodiment two or three: the preparation method that the wood described in step 1 is moulded compound veneer is: by biomass fiber, thermoplastic material and coupling agent in mass ratio the ratio of 1:0.6:0.07 in high-speed mixer, mix, then send into double screw extruder extrusion molding, obtain wood and mould compound veneer; Wherein thermoplastic material is thermoplastic powder or thermoplastic fiber; Thermoplastic is polyethylene, polypropylene or igelite; Coupling agent is maleic anhydride inoculated polypropylene, maleic anhydride grafted polyethylene or silane coupler.Other is identical with the specific embodiment two or three.
The specific embodiment five: present embodiment is different from one of specific embodiment two to four: the preparation method that the wood described in step 1 is moulded compound veneer is: by biomass fiber, thermoplastic material and coupling agent in mass ratio the ratio of 1:0.6:0.07 in high-speed mixer, mix, then dress up at airtight steel die middle berth the slab that thickness is 3～15mm thickness, again slab is put into hot press with the temperature hot pressing 5～18min of 170～190 ℃, obtained wood after cooling to mould compound veneer; Wherein thermoplastic material is thermoplastic powder or thermoplastic fiber; Thermoplastic is polyethylene, polypropylene or igelite; Coupling agent is maleic anhydride inoculated polypropylene, maleic anhydride grafted polyethylene or silane coupler.Other is identical with one of specific embodiment two to four.
By following verification experimental verification beneficial effect of the present invention:
Test 1, this test are divided into test group and control group;
The method that test group is prepared carbon cloth enhancing wood plastic composite follows these steps to realize:
One, wood is moulded the preparation of veneer: a, being 1:0.6:0.07 by Poplar Powder, high density polyethylene (HDPE) particle and maleic anhydride grafted polyethylene according to mass ratio, ratio is mixed 10min in high-speed mixer, then use double screw extruder granulation, obtain the pellet of hot-pressed board.Twin-screw rate of feeding is set to 10r/min, and 30 engine speeds are set to 30r/min, and the temperature setting in the each district of twin-screw is as table 1:
Table 1. is tested the 1 each district of double screw extruder temperature
B, the pellet in step 1 is mated formation at airtight steel die to thickness is respectively 1,2,3,5, the slab of 7mm, slab put into hot press take the temperature hot pressing 5-15min of 170 ℃ obtain thickness as 1,2,3,5, the wood of 7mm moulds veneer;
Two, according to top layer wood mould layer, strengthen carbon cloth layer, sandwich layer wood is moulded layer, strengthen carbon cloth layer, order that top layer wood is moulded layer stacks successively, then puts into hot press and continues hot pressing 3-15min with the temperature of 170 ℃, obtain carbon cloth and strengthen wood plastic composite.
Its mesexine wood is moulded plate and sandwich layer wood, and to mould plate be that wood prepared by step 1 is moulded compound veneer, and this tests carbon cloth used is to provide 12K unidirectional lamination by Shenyang Zhong Heng composite Co., Ltd, and thickness only has 0.111mm, and the quality of every square meter is 200g.
It is 7mm that the carbon cloth that this test obtains strengthens wood plastic composite thickness, and sectional dimension is 160 × 160mm.
Moulding layer and sandwich layer wood according to top layer wood moulds the different four kinds of carbon cloths enhancing wood that designed respectively of thickness of layer and moulds structure type, mould layer thickness different called after CF1, CF3, CF5, CF7 respectively according to sandwich layer wood, therefore wherein due to top layer wood, to mould layer thickness be 0 to only have three-decker to CF7, other three kinds are five-layer structure, the structure of CF1, CF3, CF5, CF7 as shown in Figure 2-5, wherein in CF1, CF3, CF5 a be top layer wood mould layer, b for strengthen carbon cloth layer, c be sandwich layer wood mould layer, d for strengthening carbon cloth layer, e is that top layer wood is moulded layer; In CF7, a is that enhancing carbon cloth layer, b are that sandwich layer wood is moulded layer, c for strengthening carbon cloth layer; In CF1, the thickness of a is 3mm, and the thickness of c is 1mm, and the thickness of e is 3mm; In CF3, the thickness of a is 2mm, and the thickness of c is 3mm, and the thickness of e is 2mm; In CF5, the thickness of a is 1mm, and the thickness of c is 5mm, and the thickness of e is 1mm; In CF7, the thickness of b is 7mm.
The material of this test control group is that the wood that thickness that step b obtains is 7mm is moulded veneer, called after CF0.
The tensile property of composite is tested on omnipotent mechanical test machine with reference to ASTM D638-03 standard; Bending property is tested on omnipotent mechanical test machine with reference to ASTM D790-03; Impact property is tested on combination shock machine with reference to GB/T1043.1-2008, and test result is listed in following table 2:
Table 2. is tested the mechanical property result of test group and control group in 1
Adding of test group carbon cloth significantly improved the every mechanical property of wood plastic composite.Compared with control group CF0, CF7(moulds plate when surface when carbon cloth is attached to wood) bending strength strengthens maximumly, improved 127%; CF5(is that carbon cloth is 1mm thickness from top layer) elastic modelling quantity maximum, has improved 48%; CF1(is that carbon cloth is 3mm thickness from top layer) hot strength maximum, improve 300%, tensile property strengthens effect highly significant; CF1(is that carbon cloth is 3mm thickness from top layer) elongation at break maximum, has improved 147%; CF3(is that carbon cloth is 2mm thickness from top layer) impact strength maximum, improve 448%, significantly improve the fragility of wood plastic composite, strengthen toughness.
Test 2, this test are divided into test group and control group;
The method that test group is prepared carbon cloth enhancing wood plastic composite follows these steps to realize:
One, wood is moulded the preparation of veneer: the ratio that is 1:0.6:0.07 according to mass ratio by Poplar Powder, PP GRANULES and maleic anhydride inoculated polypropylene mixes in high-speed mixer, then uses double screw extruder extrusion molding, obtains wood and moulds compound veneer; Prepare respectively thickness and be 1,2,3,5, the wood of 7mm moulds veneer, twin-screw rate of feeding is set to 10r/min, 30 engine speeds are set to 30r/min, the temperature setting in the each district of twin-screw is as table 3:
Table 3. is tested the each district of double screw extruder temperature in 2
Two, according to top layer wood mould layer, strengthen carbon cloth layer, sandwich layer wood is moulded layer, strengthen carbon cloth layer, order that top layer wood is moulded layer stacks successively, then puts into hot press and continues hot pressing 5min with the temperature of 180 ℃, obtain carbon cloth and strengthen wood plastic composite.
Its mesexine wood is moulded plate and sandwich layer wood, and to mould plate be that wood prepared by step 1 is moulded compound veneer, and this tests carbon cloth used is to provide 12K unidirectional lamination by Shenyang Zhong Heng composite Co., Ltd, and thickness only has 0.111mm, and the quality of every square meter is 200g.
It is 7mm that the carbon cloth that this test obtains strengthens wood plastic composite thickness, and sectional dimension is 160 × 160mm.
Moulding layer and sandwich layer wood according to top layer wood moulds the different four kinds of carbon cloths enhancing wood that designed respectively of thickness of layer and moulds structure type, mould layer thickness different called after CF1, CF3, CF5, CF7 respectively according to sandwich layer wood, therefore wherein due to top layer wood, to mould layer thickness be 0 to only have three-decker to CF7, other three kinds are five-layer structure, and the structure of CF1, CF3, CF5, CF7 is identical with test 1.The material of this test control group is that the wood that thickness that step b obtains is 7mm is moulded veneer, called after CF0.
The tensile property of composite is tested on omnipotent mechanical test machine with reference to ASTM D638-03 standard; Bending property is tested on omnipotent mechanical test machine with reference to ASTM D790-03; Impact property is tested on combination shock machine with reference to GB/T1043.1-2008, and test result is in table 4.
Adding of test group carbon cloth significantly improved the every mechanical property of wood plastic composite.Compared with control group CF0, CF7(moulds plate when surface when carbon cloth is attached to wood) bending strength strengthens maximumly, improved 148%; CF5(is that carbon cloth is 1mm thickness from top layer) elastic modelling quantity maximum, has improved 51%; CF3(is that carbon cloth is 2mm thickness from top layer) hot strength maximum, improve 258%, tensile property strengthens effect highly significant; CF1(is that carbon cloth is 3mm thickness from top layer) elongation at break maximum, has improved 154%; CF3(is that carbon cloth is 2mm thickness from top layer) impact strength maximum, improve 645%, improve greatly the fragility of wood plastic composite, strengthen its toughness.
Table 4. is tested the mechanical property result of test group and control group in 2
Visible above, no matter be polyvinyl or polypropylene base wood-plastic composite wood, adding of carbon cloth all has significant effect to the raising of wood plastic composite comprehensive mechanical property, for different application places and performance requirement, can select different structural manufacturing process: the result of compbined test 1 and test 2 is known, requiring high place can select CF7(to bending property is that carbon cloth is attached to wood and moulds plate surface); Requiring high place can select CF3(to tensile property and impact property is that carbon cloth is 2mm thickness from top layer).
Claims (5)
1. carbon cloth strengthens a wood plastic composite, it is characterized in that carbon cloth strengthen wood plastic composite be by top layer wood mould layer, strengthen carbon cloth layer, sandwich layer wood is moulded layer, strengthen carbon cloth layer and top layer wood moulds layer hot pressing and form.
2. carbon cloth strengthens a preparation method for wood plastic composite, it is characterized in that the preparation method of carbon cloth enhancing wood plastic composite carries out according to following steps:
One, wood is moulded the preparation of compound veneer;
Two, the fine preparation that strengthens wood plastic composite of carbon: according to the fine performance requirement that strengthens wood plastic composite of carbon, successively the top layer wood of respective thickness moulded to plate, strengthened that carbon cloth, sandwich layer wood are moulded plate, strengthened carbon cloth, top layer wood is moulded plate and stacked assembly, then put into hot press with the temperature hot pressing 3～15min of 170～190 ℃, be cooled to again below 60 degree, obtain carbon cloth and strengthen wood plastic composite, complete; Wherein said performance requirement is bending strength, elastic modelling quantity, hot strength or elongation at break;
If desired the fine bending strength that strengthens wood plastic composite of carbon is 30～100Mpa, successively 0～3mm top layer wood is moulded to plate, is strengthened carbon cloth, 1～7mm sandwich layer wood is moulded plate, strengthen carbon cloth and 0～3mm top layer wood moulds plate and stack assembly;
If desired the fine elastic modelling quantity that strengthens wood plastic composite of carbon is 1.5～4.5Gpa, successively 1～3mm top layer wood is moulded to plate, is strengthened carbon cloth, 1～7mm sandwich layer wood is moulded plate, strengthen carbon cloth and 1～3mm top layer wood moulds plate and stack assembly;
If desired the fine hot strength that strengthens wood plastic composite of carbon is 20～70Mpa, successively 1～3mm top layer wood is moulded to plate, is strengthened carbon cloth, 1～7mm sandwich layer wood is moulded plate, strengthen carbon cloth and 1～3mm top layer wood moulds plate and stack assembly;
If desired the fine elongation at break that strengthens wood plastic composite of carbon is 10～17%, successively 1～3mm top layer wood is moulded to plate, is strengthened carbon cloth, 1～7mm sandwich layer wood is moulded plate, strengthen carbon cloth and 1～3mm top layer wood moulds plate and stack assembly;
If desired the fine impact strength that strengthens wood plastic composite of carbon is 20～60Mpa, successively 1～3mm top layer wood is moulded to plate, is strengthened carbon cloth, 1～7mm sandwich layer wood is moulded plate, strengthen carbon cloth and 1～3mm top layer wood moulds plate and stack assembly;
Its mesexine wood is moulded plate and sandwich layer wood, and to mould plate be that wood prepared by step 1 is moulded compound veneer, and the thickness that strengthens carbon cloth is 0.01～0.2mm, and strengthening carbon cloth is that monolayer carbon fiber cloth, single-layer glass fiber cloth or single layer fibre strengthen polymer.
3. a kind of carbon cloth according to claim 2 strengthens the preparation method of wood plastic composite, it is characterized in that wood described in step 1 moulds the preparation method of veneer and be: one, granulation: by biomass fiber, thermoplastic material and coupling agent in mass ratio the ratio of 1:0.6:0.07 in high-speed mixer, mix 10min, then use double screw extruder granulation, obtain the pellet of hot-pressed board; Two, prepare wood and mould compound veneer: the pellet in step 1 is dressed up to the slab that thickness is 1～10mm thickness at airtight steel die middle berth, then slab is put into hot press with the temperature hot pressing 3～15min of 170～190 ℃, obtain wood after cooling to mould compound veneer; Wherein thermoplastic material is thermoplastic powder or thermoplastic fiber; Thermoplastic is polyethylene, polypropylene or igelite; Coupling agent is maleic anhydride inoculated polypropylene, maleic anhydride grafted polyethylene or silane coupler.
4. a kind of carbon cloth according to claim 2 strengthens the preparation method of wood plastic composite, it is characterized in that wood described in step 1 moulds the preparation method of compound veneer and be: by biomass fiber, thermoplastic material and coupling agent in mass ratio the ratio of 1:0.6:0.07 in high-speed mixer, mix, then send into double screw extruder extrusion molding, obtain wood and mould compound veneer; Wherein thermoplastic material is thermoplastic powder or thermoplastic fiber; Thermoplastic is polyethylene, polypropylene or igelite; Coupling agent is maleic anhydride inoculated polypropylene, maleic anhydride grafted polyethylene or silane coupler.
5. a kind of carbon cloth according to claim 2 strengthens the preparation method of wood plastic composite, it is characterized in that wood described in step 1 moulds the preparation method of compound veneer and be: by biomass fiber, thermoplastic material and coupling agent in mass ratio the ratio of 1:0.6:0.07 in high-speed mixer, mix, then dress up at airtight steel die middle berth the slab that thickness is 3～15mm thickness, again slab is put into hot press with the temperature hot pressing 5～18min of 170～190 ℃, obtained wood after cooling to mould compound veneer; Wherein thermoplastic material is thermoplastic powder or thermoplastic fiber; Thermoplastic is polyethylene, polypropylene or igelite; Coupling agent is maleic anhydride inoculated polypropylene, maleic anhydride grafted polyethylene or silane coupler.
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| CN111634075A (en) * | 2020-06-22 | 2020-09-08 | 常州市兔客智能科技有限公司 | Carbon fiber solid wood board and preparation process thereof |
| CN112477324A (en) * | 2020-11-20 | 2021-03-12 | 华南农业大学 | Flexible fiber net layer reinforced shock-absorbing noise-reducing wood-plastic composite material and manufacturing method thereof |
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