CN106987087A - A kind of 3D printing modified ABS and PS materials for mixing graphene nanometer sheet and aluminum oxide nanoparticle and preparation method thereof - Google Patents
A kind of 3D printing modified ABS and PS materials for mixing graphene nanometer sheet and aluminum oxide nanoparticle and preparation method thereof Download PDFInfo
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- CN106987087A CN106987087A CN201710347698.8A CN201710347698A CN106987087A CN 106987087 A CN106987087 A CN 106987087A CN 201710347698 A CN201710347698 A CN 201710347698A CN 106987087 A CN106987087 A CN 106987087A
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- abs
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- nanometer sheet
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
- C08L55/02—ABS [Acrylonitrile-Butadiene-Styrene] polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Abstract
The invention provides a kind of 3D printing modified ABS and PS materials for mixing graphene nanometer sheet and aluminum oxide nanoparticle and preparation method thereof, the preparation method is to be well mixed dried PS and ABS with surfactant;Then glass fibre, graphene nanometer sheet and aluminum oxide nanoparticle are added, mixing, through Screw Extrusion after heating, is dried, obtains modified ABS material.The preparation-obtained 3D printing of the present invention is less prone to warpage, cracking with modified ABS material, and contract on cooling performance significantly improves.
Description
Technical field
The invention belongs to 3D printing technique field, and in particular to a kind of graphene nanometer sheet and aluminum oxide nanoparticle mixed
3D printing modified ABS and PS materials and preparation method thereof.
Background technology
3D printing (3DP) is one kind of rapid shaping technique, and it is a kind of based on mathematical model file, with powder
Shape metal or plastics etc. can jointing material, come the technology of constructed object by way of successively printing.
3D printing is typically what is realized using digital technology file printing machine.Often in the neck such as Making mold, industrial design
Domain is used for modeling, after be gradually available for the direct manufactures of some products, had zero printed using this technology
Part.The technology is in jewelry, footwear, industrial design, building, engineering and construction (AEC), automobile, Aero-Space, dentistry and medical treatment
Industry, education, GIS-Geographic Information System, civil engineering, gun and other field have all been applied.
3D printing has many different technologies.Their difference is in the way of available material, and with
Different layer building establishment portion parts.3D printing common used material has nylon glass, PLA, ABS resin, durability nylon material, stone
Cream material, aluminum, titanium alloy, stainless steel, plating aluminum oxide, gold-plated, rubber type of material.
Wherein, ABS resin is to be used for the material of fused glass pellet (FDM) technology earliest, and the print temperature of the material is
210-260 DEG C, glass transition temperature is 105 DEG C, and it has lot of advantages, and such as intensity is higher, and toughness is preferable, impact resistance, absolutely
Edge number, it is anticorrosive, it is low temperature resistant, but heating is needed during ABS printings, while the material contract on cooling is it is obvious that easily go out
The quality problems such as existing warpage, cracking.
The content of the invention
An object of the present invention is simple there is provided a kind of preparation method in view of the shortcomings of the prior art, prepares
Modified ABS material excellent performance the 3D printing modified ABS and PS materials of mixing graphene nanometer sheet and aluminum oxide nanoparticle
The preparation method of material.
An object of the present invention is to be less prone to warpage there is provided one kind in view of the shortcomings of the prior art, ftractureed, to the cold
What shrinkage significantly improved mixes the 3D printing modified ABS and PS materials of graphene nanometer sheet and aluminum oxide nanoparticle
Material.
Technical program of the present invention lies in provide a kind of 3D printing use for mixing graphene nanometer sheet and aluminum oxide nanoparticle
The preparation method of modified ABS and PS materials, it is characterised in that the preparation method is that dried PS and ABS and surface live
Property agent be well mixed;Then glass fibre, graphene nanometer sheet and aluminum oxide nanoparticle, mixing, screw rod after heating are added
Extrusion, dries, obtains modified ABS and PS materials.
The present invention further comprises following preferred technical scheme:
It is preferred that scheme in, PS and ABS mass ratio is 1-5:5-10.
PS and ABS mass ratio is more preferably 2-4:6-8.
It is preferred that scheme in, with respect to 100 mass parts ABS, the addition of graphene nanometer sheet is 1-5 parts.
It is preferred that scheme in, with respect to 100 mass parts ABS, the amount of glass fibre is 5-20 parts.
It is preferred that scheme in, with respect to 100 mass parts ABS, the amount of glass fibre is 5-10 parts.
It is preferred that scheme in, with respect to 100 mass parts ABS, the addition of aluminum oxide nanoparticle is 1-5 parts, and its particle diameter is
0.1-5nm。
It is preferred that scheme in, the glass fibre be nano-grade glass fibre, its a diameter of 10-100nm.
It is preferred that scheme in, with respect to 100 mass parts ABS, the addition of the surfactant is 1-5 parts.
It is preferred that scheme in, the heating-up temperature be 150-250 DEG C.
The drying temperature is preferably 50-80 DEG C, and drying mode is vacuum drying.
The preparation-obtained 3D printing modification for mixing graphene nanometer sheet and aluminum oxide nanoparticle of above-mentioned preparation method
ABS and PS materials.
Compared with prior art, the advantage of the invention is that:
1st, in 3D printing ABS material, simple addition glass fibre easily causes anisotropic, makes the capacity of heat transmission of material
It is uneven.And be usually that point is contacted between fiber and fiber, it is unfavorable for heat transmission.Add a certain proportion of high heat conduction graphene
Nanometer sheet and aluminum oxide nanoparticle, graphene nanometer sheet and aluminum oxide nanoparticle disperse and adsorbed in fiber surface, present
Point-line-face contact, enhances the passage of heat of composite inner, simultaneously because the high-specific surface area of nano material, moreover it is possible to increase
The interfacial adhesion between fiberfill and ABS matrixes, reduces the interface resistance of composite inner by force.
2nd, by the combination of PS+ABS+ glass fibres+graphene nanometer sheet+aluminum oxide nanoparticle, not only greatly reduce
Usage amount needed for glass fibre, and largely improve the performance of ABS material.
3rd, warpage, cracking phenomena are largely reduced.
4th, contract on cooling performance significantly improves.
5th, the yellowing phenomenon of products obtained therefrom of the present invention significantly improves.
Embodiment
Embodiment 1
By PS and ABS in 65 DEG C of heating, vacuum drying is well mixed with surfactant;Then glass fibre, stone are added
Black alkene nanometer sheet and aluminum oxide nanoparticle, mixing, by Screw Extrusion after 200 DEG C of heating, are dried, obtain modified
ABS material.
Wherein,
PS 20kg
ABS 100kg
Surfactant 1kg
Glass fibre 20kg
Graphene nanometer sheet 5kg
Aluminum oxide nanoparticle 4kg
Embodiment 2
By PS and ABS in 50 DEG C of heating, vacuum drying is well mixed with surfactant;Then glass fibre, stone are added
Black alkene nanometer sheet and aluminum oxide nanoparticle, mixing, by Screw Extrusion after 180 DEG C of heating, are dried, obtain modified
ABS material.
Wherein,
PS 40kg
ABS 100kg
Surfactant 1kg
Glass fibre 5kg
Graphene nanometer sheet 2kg
Aluminum oxide nanoparticle 2kg
Embodiment 3
By PS and ABS in 70 DEG C of heating, vacuum drying is well mixed with surfactant;Then glass fibre, stone are added
Black alkene nanometer sheet and aluminum oxide nanoparticle, mixing, by Screw Extrusion after 180 DEG C of heating, are dried, obtain modified
ABS material.
Wherein,
PS 50kg
ABS 100kg
Surfactant 2kg
Glass fibre 10kg
Graphene nanometer sheet 3.2kg
Aluminum oxide nanoparticle 3kg
Embodiment 4
By PS and ABS in 75 DEG C of heating, vacuum drying is well mixed with surfactant;Then glass fibre, stone are added
Black alkene nanometer sheet and aluminum oxide nanoparticle, mixing, by Screw Extrusion after 200 DEG C of heating, are dried, obtain modified
ABS material.
Wherein,
PS 30kg
ABS 100kg
Surfactant 2kg
Glass fibre 7kg
Graphene nanometer sheet 3kg
Aluminum oxide nanoparticle 2kg
Embodiment 5
By PS and ABS in 50 DEG C of heating, vacuum drying is well mixed with surfactant;Then glass fibre, stone are added
Black alkene nanometer sheet and aluminum oxide nanoparticle, mixing, by Screw Extrusion after 220 DEG C of heating, are dried, obtain modified
ABS material.
Wherein,
PS 50kg
ABS 100kg
Surfactant 5kg
Glass fibre 20kg
Graphene nanometer sheet 2.5kg
Aluminum oxide nanoparticle 1kg
Embodiment 6
By PS and ABS in 80 DEG C of heating, vacuum drying is well mixed with surfactant;Then glass fibre, stone are added
Black alkene nanometer sheet and aluminum oxide nanoparticle, mixing, by Screw Extrusion after 200 DEG C of heating, are dried, obtain modified
ABS material.
Wherein,
PS 50kg
ABS 100kg
Surfactant 5kg
Glass fibre 15kg
Graphene nanometer sheet 3kg
Aluminum oxide nanoparticle 2kg
Embodiment 7
By PS and ABS in 55 DEG C of heating, vacuum drying is well mixed with surfactant;Then glass fibre, stone are added
Black alkene nanometer sheet and aluminum oxide nanoparticle, mixing, by Screw Extrusion after 250 DEG C of heating, are dried, obtain modified
ABS material.
Wherein,
PS 50kg
ABS 100kg
Surfactant 5kg
Glass fibre 8kg
Graphene nanometer sheet 5kg
Aluminum oxide nanoparticle 4kg
Comparative example 1
By PS and ABS in 55 DEG C of heating, vacuum drying is well mixed with surfactant;Then graphene nano is added
Piece, mixing, by Screw Extrusion after 250 DEG C of heating, is dried, obtains modified ABS material.
Wherein,
PS 50kg
ABS 100kg
Surfactant 5kg
Graphene nanometer sheet 10kg
Aluminum oxide nanoparticle 0.5kg
Comparative example 2
By PS and ABS in 65 DEG C of heating, vacuum drying is well mixed with surfactant;Then glass fibre is added, is mixed
Close, by Screw Extrusion after 200 DEG C of heating, dry, obtain modified ABS material.
Wherein,
PS 20kg
ABS 100kg
Surfactant 0.5kg
Glass fibre 30kg
Aluminum oxide nanoparticle 8kg
Comparative example 3
By ABS in 65 DEG C of heating, vacuum drying is well mixed with surfactant;Then glass fibre and stone are added
Black alkene nanometer sheet, mixing, by Screw Extrusion after 200 DEG C of heating, is dried, obtains modified ABS material.
Wherein,
ABS 100kg
Surfactant 1kg
Glass fibre 40kg
Graphene nanometer sheet 10kg
Comparative example 4
By PS in 50 DEG C of heating, vacuum drying is well mixed with surfactant;Then glass fibre and graphite are added
Alkene nanometer sheet, mixing, by Screw Extrusion after 180 DEG C of heating, is dried, obtains modified ABS material.
Wherein,
ABS 100kg
Surfactant 1kg
Glass fibre 10kg
Graphene nanometer sheet 10kg
Comparative example 5
By PS and ABS in 65 DEG C of heating, vacuum drying is well mixed with surfactant;Then add glass fibre with
And graphene nanometer sheet, mixing, by Screw Extrusion after 200 DEG C of heating, dry, obtain modified ABS material.
Wherein,
PS 200kg
ABS 100kg
Surfactant 1kg
Glass fibre 20kg
Graphene nanometer sheet 0.5kg
Comparative example 6
By PS and ABS in 65 DEG C of heating, vacuum drying is well mixed with surfactant;Then add glass fibre with
And graphene nanometer sheet, mixing, by Screw Extrusion after 200 DEG C of heating, dry, obtain modified ABS material.
Wherein,
PS 20kg
ABS 100kg
Surfactant 1.5kg
Glass fibre 20kg
Graphene nanometer sheet 0.5kg
Comparative example 7
By PS and ABS in 75 DEG C of heating, vacuum drying is well mixed with surfactant;Then add glass fibre with
And graphene nanometer sheet, mixing, by Screw Extrusion after 200 DEG C of heating, dry, obtain modified ABS material.
Wherein,
PS 45kg
ABS 100kg
Surfactant 10kg
Glass fibre 25kg
Graphene nanometer sheet 4kg
Comparative example 8
By PS and ABS in 55 DEG C of heating, vacuum drying is well mixed with surfactant;Then add glass fibre with
And graphene nanometer sheet, mixing, by Screw Extrusion after 250 DEG C of heating, dry, obtain modified ABS material.
Wherein,
PS 50kg
ABS 100kg
Surfactant 5kg
Glass fibre 25kg
Graphene nanometer sheet 10kg
Comparative example 9
By PS and ABS in 65 DEG C of heating, vacuum drying is well mixed with surfactant;Then glass fibre is added, is mixed
Close, by Screw Extrusion after 200 DEG C of heating, dry, obtain modified ABS material.
Wherein,
PS 20kg
ABS 100kg
Surfactant 0.5kg
Glass fibre 25kg
Ten batch finished products are prepared using product described in embodiment 1-6 and comparative example 1-8 as 3D printing raw material, it sticks up
Bent and cracking performance is as shown in table 1:
Table 1
Claims (10)
1. a kind of 3D printing modified ABS and the preparation method of PS materials for mixing graphene nanometer sheet and aluminum oxide nanoparticle,
Characterized in that, the preparation method is to be well mixed dried PS and ABS with surfactant;Then glass fibers are added
Dimension, aluminum oxide nanoparticle and graphene nanometer sheet, mixing, through Screw Extrusion after heating, are dried, obtain modified ABS
Material.
2. the preparation method of 3D printing modified ABS according to claim 1 and PS materials, it is characterised in that PS and ABS
Mass ratio be 1-5:5-10.
3. the preparation method of 3D printing modified ABS according to claim 1 and PS materials, it is characterised in that PS and ABS
Mass ratio be 2-4:6-8.
4. the preparation method of the 3D printing modified ABS and PS materials according to claim any one of 1-3, its feature exists
In with respect to 100 mass parts ABS, the addition of graphene nanometer sheet is 1-5 parts.
5. the preparation method of the 3D printing modified ABS and PS materials according to claim any one of 1-3, its feature exists
In with respect to 100 mass parts ABS, the amount of glass fibre is 5-20 parts.
6. the preparation method of the 3D printing modified ABS and PS materials according to claim any one of 1-3, its feature exists
In with respect to 100 mass parts ABS, the addition of aluminum oxide nanoparticle is 1-5 parts, and its particle diameter is 0.1-5nm.
7. the preparation method of 3D printing modified ABS according to claim 5 and PS materials, it is characterised in that the glass
Glass fiber is nano-grade glass fibre, its a diameter of 10-100nm.
8. the 3D printing modification for mixing graphene nanometer sheet and aluminum oxide nanoparticle according to claim any one of 1-3
The preparation method of ABS and PS materials, it is characterised in that with respect to 100 mass parts ABS, the addition of the surfactant is 1-5
Part.
9. the preparation method of 3D printing modified ABS according to claim 1 and PS materials, it is characterised in that described to add
Hot temperature is 150-250 DEG C.
10. the preparation-obtained 3D printing modified ABS material of any one of claim 1-9 method.
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108148341A (en) * | 2018-01-02 | 2018-06-12 | 湖南望隆企业管理咨询有限公司 | A kind of composite plastic of good combination property and preparation method thereof |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104559034A (en) * | 2015-01-09 | 2015-04-29 | 机械科学研究总院先进制造技术研究中心 | Modified ABS resin for 3D printing as well as preparation method of modified ABS resin |
CN104974461A (en) * | 2015-06-30 | 2015-10-14 | 深圳光华伟业股份有限公司 | ABS alloy material, and preparation method thereof |
CN105599302A (en) * | 2016-01-20 | 2016-05-25 | 鑫烯三维科技(上海)有限公司 | Continuous fiber fused deposition 3D (three-dimensional) printing method and application thereof |
CN105623215A (en) * | 2016-02-02 | 2016-06-01 | 北京化工大学 | Flexible circuit conductive composition and 3D (three dimensional) printing based flexible circuit construction method |
CN105936678A (en) * | 2016-06-01 | 2016-09-14 | 广西医科大学 | Reinforcing flexibilizer used for 3D printing of ABS, ABS composite material, production method of ABS composite material |
-
2017
- 2017-05-17 CN CN201710347698.8A patent/CN106987087A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104559034A (en) * | 2015-01-09 | 2015-04-29 | 机械科学研究总院先进制造技术研究中心 | Modified ABS resin for 3D printing as well as preparation method of modified ABS resin |
CN104974461A (en) * | 2015-06-30 | 2015-10-14 | 深圳光华伟业股份有限公司 | ABS alloy material, and preparation method thereof |
CN105599302A (en) * | 2016-01-20 | 2016-05-25 | 鑫烯三维科技(上海)有限公司 | Continuous fiber fused deposition 3D (three-dimensional) printing method and application thereof |
CN105623215A (en) * | 2016-02-02 | 2016-06-01 | 北京化工大学 | Flexible circuit conductive composition and 3D (three dimensional) printing based flexible circuit construction method |
CN105936678A (en) * | 2016-06-01 | 2016-09-14 | 广西医科大学 | Reinforcing flexibilizer used for 3D printing of ABS, ABS composite material, production method of ABS composite material |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108148341A (en) * | 2018-01-02 | 2018-06-12 | 湖南望隆企业管理咨询有限公司 | A kind of composite plastic of good combination property and preparation method thereof |
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