CN103849120A - Conductive composite material and its preparation method - Google Patents
Conductive composite material and its preparation method Download PDFInfo
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- CN103849120A CN103849120A CN201210504744.8A CN201210504744A CN103849120A CN 103849120 A CN103849120 A CN 103849120A CN 201210504744 A CN201210504744 A CN 201210504744A CN 103849120 A CN103849120 A CN 103849120A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/625—Screws characterised by the ratio of the threaded length of the screw to its outside diameter [L/D ratio]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/9218—Weight
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92323—Location or phase of measurement
- B29C2948/92333—Raw material handling or dosing, e.g. active hopper or feeding device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92609—Dimensions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
Abstract
The invention provides a conductive composite material and its preparation method, and the conductive composite material is prepared by use of synergistic effects of carbon nanotubes and a graphene filler. The conductive composite material comprises the following components by weight: 92 to 99 parts of a polymer; 0.9 to 6 parts of the carbon nanotubes and 0.1 to 2 parts of graphene. Compared with traditional conductive composites, the conductive composite material uses the synergistic effects of the carbon nanotubes and the graphene filler to realize the following effects of the composite system: first, by mutual connection among the conductive filler, the connection efficiency among the conductive filler is improved, and the conductivity of the conductive composite material is improved; second, the conductive filler plays the purpose of synergistic dispersion to reduce the use amount of the conductive filler; and third, the use amount of the carbon nanotubes and the graphene is reduced, the material preparation cost is saved, mechanical properties of the composite material are not lost, the preparation operation step is simple, consumption of a large amount of solvents is not needed, and the conductive composite material is suitable for large-scale industrial production.
Description
Technical field
The present invention relates to the technical field of macromolecular material, particularly a kind of conducing composite material prepared by the synergy between carbon nanotube and Graphene filler and preparation method thereof that utilizes.
Background technology
Along with the development of electron trade and information technology, also more and more higher to the requirement of macromolecular material performance.Except requiring, character that macromolecular material itself has, also to require in some cases material to there is certain electrical property, to meet as the needs of the aspects such as electro-conductive material, antistatic material, electromagnetic shielding material, planar heat producing body material.Up to now, people adopt the carbon materialses such as carbon black, graphite, carbon fiber and carbon nanotube to prepare various conductive composite materials as conductive filler material conventionally.Use traditional conductive filler material to prepare conducing composite material as carbon black etc., have cheap, raw material sources extensively wait remarkable advantage.But it is large that the shortcoming that uses traditional conductive filler material is exactly the loading level of conductive filler material, affect the mechanical property of material.In recent years, the excellent electrical properties that carbon nanotube has because of itself, and with the realization of its preparation of industrialization technology, the technology of preparing various conductive composite materials using carbon nanotube as emerging carbon materials has more and more caused people's attention.Meanwhile, Graphene, because of its peculiar electrical properties and good thermal property, has a good application prospect in fields such as aerospace, novel material, electric power, electronics.In the real application research of Graphene, polymer/graphene nano composite material is considered to have one of direction of application prospect most.But in actual industrial production, Graphene is because of few, the with high costs main factor forming as limiting its widespread use of its volume production scale.Therefore, how to meet under the prerequisite of conductive composite material requirement on electric performance, the ratio of consumption between optimization conductive filler material, improve its utilising efficiency, synergy between performance conductive filler material, play not only can meet electrical property requirement simultaneously but also do not lose the effect of mechanical property, there is important value and significance industrial.
At present, people are preparing in the process of filled-type conducing composite material, and its subject matter is exactly to concentrate on the consumption that how to reduce conductive filler material.The method of generally taking is to improve as much as possible the degree of scatter of conductive filler material in polymeric matrix.As in conductive composite material preparation process, adopt finishing method, adopt the solvent of good dispersity to carry out the method for dispersing and mixing to Graphene or in-situ polymerization, solution combined method of adopting etc., all technical foundation based on such.Although these methods can reduce the usage quantity of conductive filler material in certain degree, all in different degree, exist operation steps complexity, expend a large amount of solvents, be not suitable for the shortcomings such as large-scale commercial production and certain limitation.
Summary of the invention
The object of the invention is, provides that a kind of electric conductivity is high, conductive filler material usage quantity is few, mechanical property is excellent, low cost, conducing composite material easy and simple to handle for solving problems of the prior art.
Another object of the present invention is to provide a kind of preparation method of above-mentioned conducing composite material.
The object of the invention is achieved through the following technical solutions:
A kind of conducing composite material, made by the component that comprises following weight part:
92 ~ 99 parts, polymkeric substance (PBT);
0.9 ~ 6 part of carbon nanotube;
0.1 ~ 2 part of Graphene.
Preferably, described polymkeric substance is polybutylene terephthalate.
Preferably, the diameter of described carbon nanotube is less than 10nm.
Preferably, described Graphene is single-layer graphene.
Preferably, the diameter of described single-layer graphene is 0.5 ~ 2 μ m, and thickness is 0.8nm-1.2nm.
A preparation method for conducing composite material, comprises the following steps:
The polymkeric substance of formula ratio, carbon nanotube and Graphene are carried out just mixing, and through processing of high molecular material equipment melting mixing, granulation forms afterwards.
Preferably, described processing of high molecular material equipment is twin screw extruder or single screw extrusion machine.
Preferably, described twin screw extruder length-to-diameter ratio is 20:1-25:1, and each zone temperatures is controlled at 235 DEG C-255 DEG C, and rotating speed is 20rpm25-rpm.
Compared with prior art, the present invention has following beneficial effect:
1, compared with traditional conducing composite material, act synergistically by utilizing between carbon nanotube and Graphene filler, can realize compound system: the first, between conductive filler material, interconnect, improve the joint efficiency between conductive filler material, thereby improve the electric conductivity of matrix material; The second, between conductive filler material, play collaborative object of disperseing, reduce the usage quantity of conductive filler material; The 3rd, the usage quantity of reduction carbon nanotube and Graphene, the preparation cost of saving material, the mechanical property of not losing matrix material simultaneously; Therefore, the present invention can reach the loading level that has reduced filler under the prerequisite that meets conductive composite material requirement on electric performance, and operation steps simply, do not need to expend a large amount of solvents, and is applicable to large-scale commercial production;
2, the super electroconductibility of the preparation method of conducing composite material of the present invention great length-to-diameter ratio and single-layer graphene because carbon nanotube has, both fillers are together in the process of mixed milling, be conducive to produce network-like complex morphological, and form the galvanic circle of greater efficiency, can make it meet under the prerequisite of conducing composite material requirement on electric performance, the ratio of consumption between optimization conductive filler material, improve its utilising efficiency, synergy between performance conductive filler material, play not only can meet electrical property requirement simultaneously but also do not lose the effect of mechanical property, reduce the preparation cost of conducing composite material simultaneously.
Embodiment
Below by embodiment, the present invention is specifically described; be necessary to be pointed out that at this embodiments of the invention are only used to further illustrate the present invention; can not be interpreted as limiting the scope of the invention, the person skilled in the art in this field can make according to the content of foregoing invention improvement and the adjustment of some non-intrinsically safes to the present invention.
In following examples, polybutylene terephthalate (PBT) is bought from Lante Nano Materials Tech Co., Ltd., Suzhou, and the trade mark is 130GRS; Carbon nanotube adopts the technical grade carbon nanotube of Nanometer Port Co., Ltd., Shenzhen, and diameter is less than 10nm, and the trade mark is NTPtube-S, and purity is 90%; Graphene adopts the single-layer graphene of Nanjing Xian Feng Nono-material Science & Technology Ltd., and the trade mark is XF001W, and diameter is 0.5 ~ 2 μ m, and thickness is 0.8nm-1.2nm, and purity is 95%.
Embodiment 1
Take raw material according to weight part below:
92 parts of PBT,
2 parts of Graphenes,
6 parts of carbon nanotubes,
Accurate load weighted material, by the pay-off of delicate metering, is sent in twin screw extruder, material the shearing of screw rod, mixing and carry under fusion fully, finally by crossing die head extruding pelletization; Wherein twin screw extruder length-to-diameter ratio is 20:1, and each zone temperatures is controlled at 235 DEG C-255 DEG C, rotating speed 20rpm; After accurately being weighed, carbon nanotube/Graphene/PBT pellet adds in hot pressing die, again mould is put into compression molding instrument hot-forming, preheating 5min, 245 DEG C of hot pressing temperatures, hot pressing time 5min, the stressed 5MPa of hot pressing, the then cooling 20min of water cycle, depanning makes carbon nanotube/Graphene/PBT composite membrane of polymer.The resistivity of measuring this composite membrane, test result is in table 1.
Embodiment 2
Take raw material according to weight part below:
99 parts of PBT,
0.1 part of Graphene,
0.9 part of carbon nanotube,
Accurate load weighted material, by the pay-off of delicate metering, is sent in twin screw extruder, material the shearing of screw rod, mixing and carry under fusion fully, finally by crossing die head extruding pelletization; Wherein twin screw extruder length-to-diameter ratio is 25:1, and each zone temperatures is controlled at 235 DEG C-255 DEG C, rotating speed 25rpm; After accurately being weighed, carbon nanotube/Graphene/PBT pellet adds in hot pressing die, again mould is put into compression molding instrument hot-forming, preheating 5min, 245 DEG C of hot pressing temperatures, hot pressing time 5min, the stressed 5MPa of hot pressing, the then cooling 20min of water cycle, depanning makes carbon nanotube/Graphene/PBT composite membrane of polymer.The resistivity of measuring this composite membrane, test result is in table 1.
Embodiment 3
Take raw material according to weight part below:
94 parts of PBT,
0.5 part of Graphene,
5.5 parts of carbon nanotubes,
Accurate load weighted material, by the pay-off of delicate metering, is sent in twin screw extruder, material the shearing of screw rod, mixing and carry under fusion fully, finally by crossing die head extruding pelletization; Wherein twin screw extruder length-to-diameter ratio is 23:1, and each zone temperatures is controlled at 235 DEG C-255 DEG C, rotating speed 25rpm; After accurately being weighed, carbon nanotube/Graphene/PBT pellet adds in hot pressing die, again mould is put into compression molding instrument hot-forming, preheating 5min, 245 DEG C of hot pressing temperatures, hot pressing time 5min, the stressed 5MPa of hot pressing, the then cooling 20min of water cycle, depanning makes carbon nanotube/Graphene/PBT composite membrane of polymer.The resistivity of measuring this composite membrane, test result is in table 1.
Embodiment 4
Take raw material according to weight part below:
95 parts of PBT,
1 part of Graphene,
4 parts of carbon nanotubes,
Accurate load weighted material, by the pay-off of delicate metering, is sent in twin screw extruder, material the shearing of screw rod, mixing and carry under fusion fully, finally by crossing die head extruding pelletization; Wherein twin screw extruder length-to-diameter ratio is 25:1, and each zone temperatures is controlled at 235 DEG C-255 DEG C, rotating speed 20rpm; After accurately being weighed, carbon nanotube/Graphene/PBT pellet adds in hot pressing die, again mould is put into compression molding instrument hot-forming, preheating 5min, 245 DEG C of hot pressing temperatures, hot pressing time 5min, the stressed 5MPa of hot pressing, the then cooling 20min of water cycle, depanning makes carbon nanotube/Graphene/PBT composite membrane of polymer.The resistivity of measuring this composite membrane, test result is in table 1.
Embodiment 5
Take raw material according to weight part below:
95.5 parts of PBT,
1.5 parts of Graphenes,
3 parts of carbon nanotubes,
Accurate load weighted material, by the pay-off of delicate metering, is sent in twin screw extruder, material the shearing of screw rod, mixing and carry under fusion fully, finally by crossing die head extruding pelletization; Wherein twin screw extruder length-to-diameter ratio is 20:1, and each zone temperatures is controlled at 235 DEG C-255 DEG C, rotating speed 25rpm; After accurately being weighed, carbon nanotube/Graphene/PBT pellet adds in hot pressing die, again mould is put into compression molding instrument hot-forming, preheating 5min, 245 DEG C of hot pressing temperatures, hot pressing time 5min, the stressed 5MPa of hot pressing, the then cooling 20min of water cycle, depanning makes carbon nanotube/Graphene/PBT composite membrane of polymer.The resistivity of measuring this composite membrane, test result is in table 1.
Embodiment 6
Take raw material according to weight part below:
96 parts of PBT,
1 part of Graphene,
3 parts of carbon nanotubes,
Accurate load weighted material, by the pay-off of delicate metering, is sent in single screw extrusion machine, material the shearing of screw rod, mixing and carry under fusion fully, finally by crossing die head extruding pelletization; Wherein single screw extrusion machine length-to-diameter ratio is 25:1, and each zone temperatures is controlled at 235 DEG C-255 DEG C, rotating speed 20rpm; After accurately being weighed, carbon nanotube/Graphene/PBT pellet adds in hot pressing die, again mould is put into compression molding instrument hot-forming, preheating 5min, 245 DEG C of hot pressing temperatures, hot pressing time 5min, the stressed 5MPa of hot pressing, the then cooling 20min of water cycle, depanning makes carbon nanotube/Graphene/PBT composite membrane of polymer.The resistivity of measuring this composite membrane, test result is in table 1.
Table 1 is the detected result of the resistivity of the composite membrane of polymer of different embodiment
Disclosed is above only several specific embodiments of the application, but the application is not limited thereto, and the changes that any person skilled in the art can think of, all should drop in the application's protection domain.
Claims (8)
1. a conducing composite material, is characterized in that, is made up of the component that comprises following weight part:
92 ~ 99 parts, polymkeric substance;
0.9 ~ 6 part of carbon nanotube;
0.1 ~ 2 part of Graphene.
2. a kind of conducing composite material as claimed in claim 1, is characterized in that, described polymkeric substance is polybutylene terephthalate.
3. a kind of conducing composite material as claimed in claim 1, is characterized in that, the diameter of described carbon nanotube is less than 10nm.
4. a kind of conducing composite material as claimed in claim 1, is characterized in that, described Graphene is single-layer graphene.
5. a kind of conducing composite material as claimed in claim 4, is characterized in that, the diameter of described single-layer graphene is 0.5 ~ 2 μ m, and thickness is 0.8nm-1.2nm.
6. as the preparation method of the conducing composite material as described in arbitrary in claim 1 ~ 5, it is characterized in that, comprise the following steps:
The polymkeric substance of formula ratio, carbon nanotube and Graphene are carried out just mixing, and through processing of high molecular material equipment melting mixing, granulation forms afterwards.
7. the preparation method of conducing composite material as claimed in claim 6, is characterized in that, described processing of high molecular material equipment is twin screw extruder or single screw extrusion machine.
8. the preparation method of conducing composite material as claimed in claim 7, is characterized in that, described twin screw extruder length-to-diameter ratio is 20:1-25:1, and each zone temperatures is controlled at 235 DEG C-255 DEG C, and rotating speed is 20rpm-25rpm.
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Cited By (9)
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| CN105623136A (en) * | 2016-03-17 | 2016-06-01 | 中国科学院深圳先进技术研究院 | Polymer conductive composite and preparation method thereof |
| CN105733112A (en) * | 2016-03-10 | 2016-07-06 | 中国科学院深圳先进技术研究院 | Electroconductive polymer composite and preparation method thereof |
| CN108047564A (en) * | 2017-12-27 | 2018-05-18 | 新奥石墨烯技术有限公司 | Conductive plastics and preparation method thereof |
| CN108117684A (en) * | 2018-01-19 | 2018-06-05 | 广州润锋科技有限公司 | A kind of polyolefin/carbon nano tube high-conductivity composite material and preparation method thereof |
| CN108117743A (en) * | 2018-01-19 | 2018-06-05 | 广州润锋科技有限公司 | A kind of highly conductive nylon composite materials of carbon nano-tube modification and preparation method thereof |
| CN109385073A (en) * | 2018-10-19 | 2019-02-26 | 沧州旭阳科技有限公司 | Electrically conductive polyamide elastic composition and preparation method thereof |
| CN109796545A (en) * | 2017-11-17 | 2019-05-24 | 中国石油天然气股份有限公司 | A kind of preparation method of antistatic ultra-high molecular weight polyethylene |
| CN110414652A (en) * | 2018-04-28 | 2019-11-05 | 华瑞墨石丹阳有限公司 | A kind of vulnerable graphite alkene RFID label tag |
| CN113105737A (en) * | 2021-03-23 | 2021-07-13 | 湖南创瑾技术研究院有限公司 | Conductive 3D printing material, preparation method and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105733112A (en) * | 2016-03-10 | 2016-07-06 | 中国科学院深圳先进技术研究院 | Electroconductive polymer composite and preparation method thereof |
| CN105623136A (en) * | 2016-03-17 | 2016-06-01 | 中国科学院深圳先进技术研究院 | Polymer conductive composite and preparation method thereof |
| CN105623136B (en) * | 2016-03-17 | 2018-06-19 | 中国科学院深圳先进技术研究院 | A kind of composite conducting polymer material and preparation method thereof |
| CN109796545A (en) * | 2017-11-17 | 2019-05-24 | 中国石油天然气股份有限公司 | A kind of preparation method of antistatic ultra-high molecular weight polyethylene |
| CN109796545B (en) * | 2017-11-17 | 2021-08-27 | 中国石油天然气股份有限公司 | Preparation method of antistatic ultrahigh molecular weight polyethylene |
| CN108047564A (en) * | 2017-12-27 | 2018-05-18 | 新奥石墨烯技术有限公司 | Conductive plastics and preparation method thereof |
| CN108117684A (en) * | 2018-01-19 | 2018-06-05 | 广州润锋科技有限公司 | A kind of polyolefin/carbon nano tube high-conductivity composite material and preparation method thereof |
| CN108117743A (en) * | 2018-01-19 | 2018-06-05 | 广州润锋科技有限公司 | A kind of highly conductive nylon composite materials of carbon nano-tube modification and preparation method thereof |
| CN110414652A (en) * | 2018-04-28 | 2019-11-05 | 华瑞墨石丹阳有限公司 | A kind of vulnerable graphite alkene RFID label tag |
| CN109385073A (en) * | 2018-10-19 | 2019-02-26 | 沧州旭阳科技有限公司 | Electrically conductive polyamide elastic composition and preparation method thereof |
| CN113105737A (en) * | 2021-03-23 | 2021-07-13 | 湖南创瑾技术研究院有限公司 | Conductive 3D printing material, preparation method and application |
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