CN108299812A - A kind of 3D printing PLA/PTW silk materials and preparation method thereof - Google Patents
A kind of 3D printing PLA/PTW silk materials and preparation method thereof Download PDFInfo
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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
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
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- 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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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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Abstract
The present invention relates to 3D printing PLA/PTW silk materials and preparation method.The present invention selects graphene oxide (GO) to replace graphene as initial fillers, it is using homogenizer or Ultrasound Instrument that the dispersion liquid of graphene oxide and the solution of polylactic acid (PLA) is fully dispersed, obtain GO/PLA dispersion liquids, the solution is restored using reducing agent, graphene/PLA composite materials are made, it is modified and is granulated through twin-screw after later being mixed graphene/PLA, PTW and compatilizer by high mixer, last Single screw extrusion molding obtains PLA/PTW silk materials.PLA/PTW silk materials have certain electric conductivity, use it for 3D printer, printing product surface is bright and clean, and dimensionally stable is not easy to shrink.Compared with prior art, the dispersion liquid that the present invention passes through reduction GO/PLA, graphene/PLA/PTW composite materials of favorable dispersibility are made, it solves the problems, such as that graphene is difficult in macromolecule resin disperse, easily unite so that the modified composite material is meeting the requirement of FDM type 3D printers while having good conductive property.
Description
Technical field
The invention belongs to 3D printing technique field, the 3D printing more particularly, to a kind of high tenacity and conductive energy is used
PLA/PTW silk materials and preparation method thereof.
Background technology
3D printing technique, i.e. one kind of rapid shaping technique, it be one kind based on digital model file, with metal
Or the adhesive materials such as plastics, by slice, the mode successively printed constructs the technology of object.In mold design, industry
The fields such as machine components manufacture, automobile, aviation, medicine obtain broad development.3D printing technique is mainly solid including cubic light
Change, laser sintered method, fusion sediment method etc., wherein fusion sediment formula printing technique (FDM) are particularly important one kind, application
Range is also extremely wide.
The cardinal principle of fusion sediment formula printing technique (FDM) is under the melting temperature of slightly above printed material by right
Heating thermoplastic material makes its melting be squeezed out from nozzle, is controlled by computer, is piled into finished product from level to level.Fusion stacking formula at present
The printed material that printing technique (FDM) is used is mainly ABS, nylon and polylactic acid (PLA) etc..
Polylactic acid is a kind of thermoplastic aliphatic polyester, while be a kind of using renewable plant resources being raw material by chemical
The Biodegradable material being synthetically prepared, PLA can carry out various processing and formings as many common macromolecules, and such as wire squeeze is blown
Various product is made in turn in film, injection molding etc., is a kind of novel environment friendly material.Therefore there is good development prospect.Polylactic acid
With good rigidity, the transparency and degradability, but flexibility and poor heat resistance, elongation at break are small, need to be to polylactic acid
It is modified the flexibility and impact strength to increase it.Also it is not at present many in relation to polylactic acid modified data document, and
It is then less in relation to the polylactic acid modified data suitable for 3D printing.103467950 A of Chinese patent application publication No. CN are public
A kind of 3D printing modified polylactic acid material and preparation method thereof is opened, this method is specifically：70~85 parts of polylactic acid, chain extender 1
~5 parts, 1~5 part of crosslinking agent, 0.5~1 part of nucleating agent, 5~10 parts of low-molecular weight polymer, 5~10 parts of toughener, reinforcing agent 1
~5 parts, 0.3~0.8 part of antioxidant；The invention is to utilize low-temperature grinding hybrid reaction technology, and processing is modified to polylactic acid.
Although the invention improves the toughness of polylactic acid, but due to adding the polymer (5~10 parts) of low molecular weight, reduce poly-
The mechanical strength of lactic acid；And the nucleating agent being added obtains very under the premise of no bonus point powder it is difficult in polylactic acid matrix
Good dispersion, nucleation cannot not only be given full play to but also will also become lacking in moulded products by disperseing uneven nucleating agent
It falls into, can have a significant impact to the physical property and surface state of material.
It is pushed as the demand of new opplication develops, the application of 3D printing technique is also constantly expanded to foreword scientific and engineering neck
Domain, one of them more noticeable field are exactly application of the grapheme material in 3D printing.Graphene is by carbon atom group
At only one layer of atomic thickness two dimensional crystal, its bi-dimensional cellular structure assigns its many unique characteristic, such as Gao Yang
Family name's modulus, bigger serface, high thermal conductivity and excellent electric conductivity.People have carried out greatly graphene composite material
The scientific research of amount, the grapheme material of sheet can be used for improving the mechanical performance, anti-flammability and electric conductivity of material.Invention is special
104552947 B of sharp CN disclose a kind of graphene fused deposition 3D printing method and application, and the dilute addition of graphite, which can be improved, beats
Tensile strength, conductivity and the thermal coefficient of printing product.It is learnt from lot of documents, graphene filler is in the polymeric material
Dispersibility is better, and the performance of obtained material is better, however how to be solved between graphene and polymer in preparation process
Phase separation is to prepare the critical issue of graphene composite material.
Invention content
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of high tenacity and have
The 3D printing of electric conductivity PLA/PTW silk materials and preparation method.
The present invention is modified polylactic acid that poly-lactic acid material brittleness is big, impact strength is low to solve by adding PTW
Problem；At the same time, the present invention is made mixed with PTW after graphene/PLA composite materials first by restoring GO/PLA dispersion liquids
It closes, solves the problems, such as that graphene is difficult in macromolecule resin and disperse, easily reunite, graphene dispersion is uniform in the material, conductive
It has excellent performance, is suitable for FDM 3D printings and is molded.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of 3D printing PLA/PTW silk materials, are prepared by the raw material of following components and parts by weight content：
Further, the polylactic acid is extrusion grade, and melt index is 10~25g/10min.
Further, the graphene oxide is made using Hummers methods, and size is 5~20 mesh.
Further, the compatilizer is organic peroxide, preferred cumyl peroxide or 2, dimethyl -2 6-,
Bis- (tert-butyl peroxy base) hexanes of 5-.
Further, the solvent is one or more in acetone, tetrahydrofuran or chloroform.
Further, the impact strength that 3D printing PLA/PTW silk materials print batten is 1.9~6.5KJm-2, lead
Electric rate is 0.1~2 × 10-7S·m-1。
The 3D printing preparation method of PLA/PTW silk materials, includes the following steps：
The polylactic acid of 1-10 parts by weight graphene oxide and 70-95 parts by weight is dissolved in respectively in same solvent, by two kinds
Solution mixing system obtains GO/PLA dispersion liquids (brown mixed solution), then be added 0.1~30 mass parts reducing agent to dispersion liquid into
Row reduction, is made graphene/PLA composite materials of black；Later by high mixer by graphene/PLA composite materials, 5~30
It is passed through after the Ethylene-butyl Acrylate-methacrylic Acid Glycerin Ester Copolymer of mass parts and the compatilizer mixing of 1-3 parts by weight
Twin-screw, which is modified, to be granulated, and is most molded afterwards through Single screw extrusion, is obtained 3D printing PLA/PTW silk materials.PLA/PTW silk materials are preferably straight
Diameter is 3 ± 0.05mm or 1.75 ± 0.03mm.
Further, select homogenizer or Ultrasound Instrument that the dispersion liquid and PLA solution and by two of graphene oxide is made
Person carries out being mixed to prepare GO/PLA dispersion liquids, and dispersion liquid temperature is controlled at 20~50 DEG C, when selecting homogenizer, mixing speed
For 2000~8000r/min, mixing time is 20~60min；When selecting ultrasonic activation, vibration frequency is 40~60Hz, is surpassed
The sound time is 15~30min.
Further, after the graphene/PLA composite materials for generating black, suitable water is added by centrifuging or filtering
Graphene/PLA material is detached from solvent, then centrifuged or is filtered, washed and is dry, graphene/PLA is finally made
Composite material.
Further, the reducing agent is at least one of hydrazine hydrate, sodium borohydride or p-phenylenediamine.
Invention further provides the high tenacity and 3D printing the answering with PLA/PTW silk materials of conductive energy
With the 3D printing of the high tenacity and conductive energy is used for 3D printing, especially fusion sediment with PLA/PTW silk materials
(Fused Deposition Modeling, abbreviation FDM) has certain electric conductivity, and printing product surface is bright and clean, size
Stablize, is not easy to shrink.PLA/PTW wire materials a diameter of 3 ± 0.05mm or 1.75 ± 0.03mm, print temperature 190-230
DEG C, hott bed temperature is 25~60 DEG C, and print speed is 20~80mm/s, and the impact strength preferred scope of printing batten is 1.9
~6.5KJm-2, conductivity preferred scope is 0.1~2 × 10-7Sm-1。
Compared with prior art, the present invention has the following advantages：
(1) what the present invention was innovative uses Ethylene-butyl Acrylate-methacrylic Acid Glycerin Ester Copolymer (PTW)
Poly-lactic acid material is modified, to improve its impact strength.
(2) what the compatilizer in the present invention was innovated uses cumyl peroxide, bis- (the tertiary fourth mistakes of 2,6- dimethyl -2,5-
Oxygroup) one kind in the organic peroxides such as hexane, addition organic peroxide can not only increase PTW and PLA as compatilizer
Compatibility, and this kind of compatilizer can also improve the intensity of polylactic acid melt simultaneously.
(3) it is learnt from lot of documents, graphene is because its surface energy is higher, easy unity, it is more difficult to by it uniformly in high score
Disperseed in subtree fat；The dispersibility of graphene filler in the polymeric material is better, and the performance of obtained material is better.
Graphite oxide is dilute to be more easy to be disperseed in resin than graphene, and the present invention uses graphene oxide to replace graphene as initial
Filler disperses GO and PLA using high-speed stirred/Ultrasound Instrument, and the dispersion liquid of dispersed preferable GO/PLA has been made, and leads to
It crosses and restores the obtained graphene/PLA composite materials of the dispersion liquid, finally mixed with PTW, PLA/PTW silk materials are made, solve graphite
Alkene difficult dispersion, the problem easily united in resin so that the modified composite material is in the requirement for meeting FDM type 3D printers
It has good conductive property simultaneously.
Description of the drawings
Fig. 1：The preparation process of 3D printing PLA/PTW silk materials.
Fig. 2：The scanning electron microscope (SEM) photograph and electrical conduction mechanism of PLA/PTW composite materials in embodiment 2 (figure a), 3 (figure b), 4 (figure c)
Figure (figure d).
Specific implementation mode
As shown in Figure 1, the 3D printing preparation method of PLA/PTW silk materials, includes the following steps：
The polylactic acid of 1~10 mass parts graphene oxide and 70~95 mass parts is dissolved in respectively in same solvent, by two
Kind solution mixing system obtains GO/PLA dispersion liquids (brown mixed solution), and 0.1~30 mass parts reducing agent is then added to dispersion liquid
It is restored, graphene/PLA composite materials of black is made；Later by high mixer by graphene/PLA composite materials, 5~
After the Ethylene-butyl Acrylate-methacrylic Acid Glycerin Ester Copolymer of 30 mass parts and the compatilizer mixing of 1-3 parts by weight
It is modified and is granulated through twin-screw, be most molded afterwards through Single screw extrusion, obtain 3D printing PLA/PTW silk materials.PLA/PTW silk materials are preferred
A diameter of 3 ± 0.05mm or 1.75 ± 0.03mm.
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
1) graphene oxide made from 1g Hummers methods is dissolved in acetone soln, at the same time by 95g PLA materials
It is dissolved in acetone, to accelerate solution rate, solution temperature is controlled at 30 DEG C；Then by the solution of the dispersion liquid of GO and PLA super
(50Hz, 20min) disperses under the action of sound instrument so that GO is sufficiently mixed with PLA material.The hydrazine hydrate of 5ml is added later to GO
It is restored, generates graphene/PLA composite materials of black.By the way that suitable water is added by graphene/PLA material from third
It is detached in ketone.Upper layer suspended matter is graphene/PLA composite materials.Then is centrifuged, washed and is dried with deionized water,
Graphene/PLA composite materials are made first.
2) by the obtained graphene/PLA material of step 1), 5gPTW and 1g cumyl peroxides through high mixer, double spiral shells
After bar extruder is modified granulation, through single screw extrusion machine, (controlling single screw extrusion machine temperature of each section is respectively：170℃、175℃、
175 DEG C, 180 DEG C) in squeezed out, subsequently entered from the silk material of die extrusion vertically into hot water cooling bath (60 DEG C of water temperature) cold
Water cooling tank carries out the PLA/PTW silk materials that a diameter of 1.75mm is made in traction by dragger.It is applied to FDM 3D to beat
Print, print temperature are 205 DEG C, and hott bed temperature is 25 DEG C, print speed 20mm/s.The conductivity of silk material is 2.18 × 10-7S·
m-1, the impact strength for printing batten is 2.11KJm-2。
Modified composite material is meeting the requirement of FDM type 3D printers while having good lead obtained by the present embodiment
Electrical property.
Embodiment 2
1) graphene oxide made from 3g Hummers methods is dissolved in tetrahydrofuran (THF) and makes GO-THF dispersions
At the same time 90g PLA resins are dissolved in formation PLA-THF solution in THF by liquid, then that GO-THF solution and PLA-THF is molten
Liquid (4000r/min, 30min) under the action of homogenizer disperses so that GO is sufficiently mixed with PLA material.It is added later
The hydrazine hydrate of 10ml restores GO, generates graphene/PLA composite materials of black.By the way that suitable water is added by stone
Black alkene/PLA material is detached from THF solution.Then is centrifuged, washed and dried with deionized water, graphene obtained first/
PLA composite materials.
2) the obtained graphene/PLA material of step 1), 10gPTW and 2g cumyl peroxides is mixed through high mixer
It closes, after double screw extruder modification granulation, (control single screw extrusion machine temperature of each section is respectively single screw extrusion machine：170℃、
175 DEG C, 175 DEG C, 180 DEG C) in squeezed out, it is subsequent vertically into hot water cooling bath (60 DEG C of water temperature) from the silk material of die extrusion
Into cold water cooling bath, graphene/PLA composite wire materials that a diameter of 1.75mm is made in traction are carried out by dragger.It is answered
For FDM 3D printings, print temperature is 215 DEG C, and hott bed temperature is 45 DEG C, print speed 40mm/s.The conductivity of silk material is
3.24×10-7S·m-1, the impact strength for printing batten is 2.79KJm-2。
Modified composite material is meeting the requirement of FDM type 3D printers while having good lead obtained by the present embodiment
Electrical property.
Embodiment 3
1) graphene oxide made from 5g Hummers methods is dissolved in chloroform soln, at the same time by 85g PLA
Resin is dissolved in chloroform soln, and to accelerate solution rate, solution temperature is controlled at 40 DEG C；Then by the dispersion liquid of GO with
The solution of PLA (40Hz, 30min) under the action of ultrasonic wave disperses so that GO is sufficiently mixed with PLA material.It is added later
The p-phenylenediamine of 24ml restores GO, generates graphene/PLA composite materials of black.It will by the way that suitable water is added
Graphene/PLA material separation, upper layer suspended matter is G-PLA composite materials.Then centrifuged with deionized water, wash with
It is dry, graphene/PLA composite materials are made first.
2) the obtained graphene/PLA material of step 1), 15gPTW and 3g cumyl peroxides is mixed through high mixer
It closes, after double screw extruder modification granulation, (control single screw extrusion machine temperature of each section is respectively single screw extrusion machine：170℃、
175 DEG C, 175 DEG C, 180 DEG C) in squeezed out, it is subsequent vertically into hot water cooling bath (60 DEG C of water temperature) from the silk material of die extrusion
Into cold water cooling bath, graphene/PLA composite wire materials that a diameter of 3mm is made in traction are carried out by dragger.It is applied to
FDM 3D printings, print temperature are 230 DEG C, and hott bed temperature is 50 DEG C, print speed 60mm/s.The conductivity of silk material is 6.89
×10-5S·m-1, the impact strength for printing batten is 3.94KJm-2。
Modified composite material is meeting the requirement of FDM type 3D printers while having good lead obtained by the present embodiment
Electrical property.
Embodiment 4
1) graphene oxide made from 7g Hummers methods is dissolved in tetrahydrofuran solution, at the same time by 80g PLA
Resin dispersion is in tetrahydrofuran solution, and to accelerate solution rate, solution temperature is controlled at 50 DEG C；Then by the dispersion liquid of GO and
The solution of PLA (6000r/min, 30min) under the action of homogenizer disperses so that GO is sufficiently mixed with PLA material.It
The p-phenylenediamine that 30ml is added afterwards restores GO, generates graphene/PLA composite materials of black.It is appropriate by being added
Water graphene/PLA material is detached, upper layer suspended matter is G-PLA composite materials.Then centrifuged with deionized water,
Washing and dry, graphene/PLA composite materials obtained first.
2) by the obtained graphene/PLA material of step 1), bis- (the tertiary fourths of 20gPTW and 1.5g 2,6- dimethyl -2,5-
Peroxy) hexane is mixed through high mixer, double screw extruder is modified after being granulated, and being placed in single screw extrusion machine, (control single screw rod is squeezed
Going out machine temperature of each section is respectively：170 DEG C, 175 DEG C, 175 DEG C, 180 DEG C) in squeezed out, from the silk material of die extrusion vertically into
Enter hot water cooling bath (60 DEG C of water temperature) and subsequently enter cold water cooling bath, carrying out traction by dragger is made a diameter of 1.75mm's
Graphene/PLA composite wire materials.It is applied to FDM 3D printings, print temperature is 210 DEG C, and hott bed temperature is 45 DEG C, printing speed
Degree is 80mm/s.The conductivity of silk material is 1.35 × 10-5S·m-1, the impact strength for printing batten is 4.66KJm-2。
Modified composite material is meeting the requirement of FDM type 3D printers while having good lead obtained by the present embodiment
Electrical property.
Embodiment 5
1) graphene oxide made from 9g Hummers methods is dissolved in chloroform soln, at the same time by 70g PLA
Resin dispersion is in chloroform soln, and to accelerate solution rate, solution temperature is controlled at 40 DEG C.Then by the dispersion liquid of GO and
PLA solution (5000r/min, 25min) under the action of homogenizer disperses so that GO is sufficiently mixed with PLA material.Later
The sodium borohydride that 45ml is added restores GO, generates graphene/PLA composite materials of black.It is suitable by being added
Water detaches graphene/PLA material from chloroform soln, is then centrifuged, washed and is dried with deionized water, it is first
Graphene/PLA composite materials are first made.
2) by the obtained graphene/PLA material of step 1), bis- (the tertiary fourth mistakes of 30gPTW and 3g 2,6- dimethyl -2,5-
Oxygroup) hexane is mixed through high mixer, double screw extruder is modified after being granulated, it is placed in single screw extrusion machine (control Single screw extrusion
Machine temperature of each section is respectively：170 DEG C, 175 DEG C, 175 DEG C, 180 DEG C) in squeezed out, from the silk material of die extrusion vertically into
Hot water cooling bath (60 DEG C of water temperature) subsequently enters cold water cooling bath, and the PLA/ that a diameter of 3mm is made in traction is carried out by dragger
PTW silk materials.It is applied to FDM 3D printings, print temperature is 235 DEG C, and hott bed temperature is 60 DEG C, print speed 50mm/s.
The conductivity of silk material is 6.93 × 10-2S·m-1, the impact strength for printing batten is 6.17KJm-2。
Modified PLA/PTW silk materials obtained by the present embodiment are meeting the requirement of FDM type 3D printers while having good
Electric conductivity.
The conductivity and impact strength carried out to the PLA/PTW composite materials of different ratio in above example is tested,
Data statistics such as table 1.
The conductivity and impact strength that the PLA/PTW composite materials of 1 different ratio of table have carried out
As shown in table 1, it can be seen that the impact strength of PLA/PTW composite materials increases with the increase of PTW numbers,
And composite material increases with graphene oxide number, and conductivity also increases.Fig. 2 gives PLA/ in embodiment 2,3,4
The scanning electron microscope (SEM) photograph of PTW composite materials, and its electrical conduction mechanism is annotated, because graphene forms in matrix resin
Conductive network so that PLA/PTW silk materials have certain electric conductivity.
The above description of the embodiments is intended to facilitate ordinary skill in the art to understand and use the invention.
Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein general
Principle is applied in other embodiment without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments, ability
Field technique personnel announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be the present invention's
Within protection domain.
Claims (10)
1. a kind of 3D printing PLA/PTW silk materials, which is characterized in that be prepared by the raw material of following components and parts by weight content
It arrives：
2. a kind of 3D printing PLA/PTW silk materials according to claim 1, which is characterized in that the polylactic acid is to squeeze out
Grade, melt index are 10~25g/10min.
3. a kind of 3D printing PLA/PTW silk materials according to claim 1, which is characterized in that the graphene oxide is big
Small is 5-20 mesh.
4. a kind of 3D printing PLA/PTW silk materials according to claim 1, which is characterized in that the compatilizer is to have
Machine peroxide, preferably cumyl peroxide or 2, bis- (tert-butyl peroxy base) hexanes of 6- dimethyl -2,5-.
5. a kind of 3D printing PLA/PTW silk materials according to claim 1, which is characterized in that the solvent is acetone, four
It is one or more in hydrogen furans or chloroform.
6. a kind of 3D printing PLA/PTW silk materials according to claim 1, which is characterized in that the 3D printing PLA/
The impact strength that PTW silk materials print batten is 1.9~6.5KJm-2, conductivity is 0.1~2 × 10-7S·m-1。
7. the preparation method of 3D printing PLA/PTW silk materials as described in any in claim 1-6, which is characterized in that including
Following steps：
The polylactic acid of 1-10 parts by weight graphene oxide and 70-95 parts by weight is dissolved in respectively in same solvent, by two kinds of solution
GO/PLA dispersion liquids are mixed to prepare, 0.1~30 mass parts reducing agent is then added, dispersion liquid is restored, obtained graphene/
PLA composite materials；Later by high mixer by graphene/PLA composite materials, the Ethylene-butyl acrylate-of 5~30 mass parts
It is modified and is granulated through twin-screw after glycidyl methacrylate copolymer and the mixing of the compatilizer of 1~3 mass parts, most afterwards through list
Screw extrusion molding obtains 3D printing PLA/PTW silk materials.
8. the preparation method of 3D printing PLA/PTW silk materials according to claim 7, which is characterized in that select high-speed stirred
The dispersion liquid and PLA solution of machine or the obtained graphene oxide of Ultrasound Instrument simultaneously carry out the two to be mixed to prepare GO/PLA dispersion liquids, point
Dispersion liquid temperature is controlled at 20~50 DEG C, and when selecting homogenizer, mixing speed is 2000~8000r/min, and mixing time is
20~60min；When selecting ultrasonic activation, vibration frequency is 40~60Hz, and ultrasonic time is 15~30min.
9. the preparation method of 3D printing PLA/PTW silk materials according to claim 7, which is characterized in that the reducing agent is
At least one of hydrazine hydrate, sodium borohydride or p-phenylenediamine.
10. the application of PLA/PTW silk materials of 3D printing described in claim 1, which is characterized in that the 3D printing PLA/PTW
Silk material is used for 3D printing, and print temperature is 190~230 DEG C, and hott bed temperature is 25~60 DEG C, and print speed is 20~80mm/s.
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Cited By (1)
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| CN114672150A (en) * | 2022-04-11 | 2022-06-28 | 青岛科技大学 | High-performance polymer-based composite material with double-network structure and preparation method thereof |
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