WO2015025944A1 - 樹脂複合材 - Google Patents
樹脂複合材 Download PDFInfo
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- WO2015025944A1 WO2015025944A1 PCT/JP2014/071967 JP2014071967W WO2015025944A1 WO 2015025944 A1 WO2015025944 A1 WO 2015025944A1 JP 2014071967 W JP2014071967 W JP 2014071967W WO 2015025944 A1 WO2015025944 A1 WO 2015025944A1
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/24—Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon or silicon
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
- C08K3/041—Carbon nanotubes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/05—Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/005—Reinforced macromolecular compounds with nanosized materials, e.g. nanoparticles, nanofibres, nanotubes, nanowires, nanorods or nanolayered materials
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
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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
- C08L101/00—Compositions of unspecified macromolecular compounds
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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
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
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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
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- C08K2201/004—Additives being defined by their length
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- C—CHEMISTRY; METALLURGY
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Definitions
- the present invention relates to a resin composite material in which a resin and CNT (carbon nanotube) are combined.
- Resin composite materials have been used in many industrial products in recent years, for example, electrostatic trays for transporting semiconductors, fuel pumps for automobiles, sports equipment such as tennis rackets and golf clubs.
- the CNT resin composite is functionally derived from CNT and has excellent functions of conductivity, thermal conductivity and mechanical strength.
- the CNTs are required to be uniformly dispersed in the resin as a base material in order to exhibit the above functions.
- Patent Document 1 it is known in many patent documents that it is difficult to uniformly disperse CNTs in a resin (Patent Document 1, etc.). Therefore, a large amount of CNT is required for the expression of the function.
- the present inventor conducted various studies on the above-mentioned problems, and proceeded with research on the assumption that the dispersion of CNTs was excessive or poor and that the CNTs were caused by a large amount of use. However, unless a large amount of CNT is used due to the agglomeration property of the CNT, it is difficult to express the above function, and it is necessary to solve technical problems that are contradictory to each other.
- An object of the present invention is to provide a resin composite material capable of expressing a function derived from the composite of CNTs.
- the resin composite according to the present invention is a resin composite obtained by combining a plurality of CNTs with a resin as a base material, wherein the concentration of the CNTs relative to the base material is 2.0% by volume or less, and The ratio of the maximum value R1 and the minimum value R2 of the volume resistivity measured by the four-probe method for a predetermined plurality of locations on the surface of a molded specimen of a resin composite material is 4.0 or less.
- the ratio between the maximum value R1 and the minimum value R2 is 4.0 or less, it is possible to obtain a resin composite material that exhibits a function derived from the composite of CNTs.
- FIG. 1A is a diagram for explaining the production of CNTs used in a resin composite according to an embodiment of the present invention, and is a cross-sectional view showing a state in which an Al thin film and an Fe thin film are formed on a silicon substrate, and FIG. It is sectional drawing which shows the state which CNT grew on Fe microparticles
- 2A is a diagram for explaining the linearity of the shape of the CNT
- FIG. 2B is a diagram for explaining the vertical alignment in the growth direction with respect to the substrate surface of the CNT
- FIG. 2C is an SEM photograph of the aggregate structure of the CNT. It is a SEM photograph which shows the conventional resin composite material by 3000 times the magnification.
- FIG. 11A is a SEM photograph of the resin composite material
- FIG. 11A is a photograph of Example 2
- FIG. 12A is a SEM photograph of the resin composite after the surface is treated with atmospheric pressure plasma
- FIG. 12A is a photograph of Example 2
- FIG. 12B is a photograph of Comparative Example 2.
- the resin composite material of the present embodiment is a resin composite material in which a plurality of CNTs are composited with a resin as a base material. It is a resin composite in which the ratio of the maximum value R1 and the minimum value R2 of volume resistivity measured by the needle method is 4.0 or less.
- the CNTs preferably have good shape linearity, are nano-dispersed, and have a uniform size and shape to remove entangled aggregates. Further, the CNT is preferably a multilayer CNT.
- the plurality of CNTs are CNTs obtained by nano-dispersion treatment of CNTs having a fiber shape of 100 nm or more with good shape linearity.
- This nano-dispersion treatment is preferably a treatment for homogenizing the size and shape of the plurality of CNTs by a pulverization process and removing an aggregate of the plurality of CNTs.
- the fiber length of 100 nm or more as CNT is that the conductivity of the resin as the base material can be maintained because the conductivity can be expressed with a low addition amount by increasing the aspect ratio of CNT. Because it becomes.
- the CNT is not particularly limited, and may be either a single-wall CNT or a multi-wall CNT, or may be a CNT mixed with a multi-wall CNT and a single-wall CNT.
- CNTs containing multi-walled CNTs are desirable from the viewpoint of excellent rigidity and difficulty in cutting when composited with a resin.
- the CNT in this specification includes a CNT whose surface is modified with a functional group.
- the CNT in the CNT composite resin of the present invention is preferably a multilayer CNT having an inner diameter of 3 nm or more and 8 nm or less and an outer diameter of the outermost layer of 5 nm or more and 35 nm or less.
- the multilayer CNTs preferably have a number of layers of 3 or more and 35 or less, and the multilayer CNTs preferably have a thermal decomposition start temperature in air of 500 ° C. or higher.
- the multi-walled CNT preferably has a residue of 1% or less after pyrolysis at 900 ° C. in air.
- Nanodispersed refers to “a state in which CNTs are dispersed in the resin in a state where the CNTs are physically separated and not entangled one by one.”
- physically separated and not intertwined means that a plurality of CNTs are isolated one by one without taking the form of agglomerated or aggregated into a lump or bundle by van der Waals force. Say that.
- the resin is not particularly limited, and either a thermosetting resin or a thermoplastic resin can be used.
- a thermosetting resin for example, epoxy resin, phenol resin, polyurethane resin, silicone resin, urea resin, melamine resin, olefin resin such as polyethylene and polypropylene resin, polyvinyl chloride resin, acrylic resin, polyester resin, nylon resin, fluorine resin, ABS resin, Polystyrene resin, polycarbonate resin, polyacetal resin, polyvinyl alcohol resin, polyphenylene sulfide resin, polyimide resin, polyphenylene ether resin, polyarylate resin, polyamideimide resin, polyetherimide resin, polyetheretherketone resin, polytetrafluoroethylene resin Can be mentioned.
- the resin is preferably a thermoplastic resin. Moreover, nylon 6, nylon 12, and polyethylene terephthalate (PET) are preferable among thermoplastic resins.
- FIG. 1A An example of the production of the CNT used for the resin composite of the present invention by the substrate growth thermal CVD method will be described below.
- an Al thin film 2 having a thickness of 30 nm is formed as a base on a 50 mm 2 silicon substrate 1 by electron beam physical vapor deposition, and an Fe thin film 3 is formed on the Al thin film 2 with a thickness of 20 nm.
- the film is formed.
- the substrate 1 is placed in a quartz tube having a diameter of 160 mm, and heated at 700 ° C. for 10 minutes under a vacuum, for example, at a reduced pressure of 200 Pa, as shown in FIG. 1B.
- Fe fine particles 41, 42,..., 4n serving as CNT growth catalysts are generated.
- CNTs 51 to 5n are grown on the Fe fine particles 41 to 4n of the substrate 1 by supplying a carbon-based gas such as acetylene, ethylene, methane, propane, propylene or the like at a predetermined flow rate of 100 sccm in this heated state.
- the grown CNTs 51 to 5n are separated from the silicon substrate 1 and collected.
- CNTs 51 to 5n obtained by this production are CNTs having good linearity.
- This linearity is described in Japanese Patent No. 4873413.
- a a slope
- b an intercept, which can be obtained from experimental data. In this case, a straight line is fitted so that the sum of the squares of the variation errors is minimized.
- the vertical alignment of the CNT 5 depends on the horizontal difference (P) along the surface of the substrate 1 between the position of the lower base 5a and the position of the upper tip 5b of the CNT 5, and the lower portion of the CNT 5 described above.
- V Q / P
- V The height of the lower base end 5a of the CNT 5 from the substrate surface is zero.
- the horizontal difference (P) approaches zero, the CNT 5 has a higher vertical alignment with respect to the substrate surface.
- FIG. 2C is a SEM photograph of the aggregate structure of CNTs at a magnification of 30 k.
- the magnification of the SEM photograph used for explanation of this determination index is an example.
- the determination coefficient R 2 is 0.970 or more and 1.0 or less, preferably more than 0.980 and 1.0 or less. When satisfy
- the CNT is a multilayer CNT having an inner diameter of the innermost layer of 3 nm to 8 nm and an outer diameter of the outermost layer of 5 nm to 35 nm. Further, this CNT is a multilayer CNT having 3 to 35 layers.
- the CNTs thus produced are pulverized with a centrifugal pulverizer (manufactured by Lecce Co., Ltd., model number: ZM200) to make the CNT shape and size uniform and remove entangled aggregates.
- Nano-dispersed CNTs can be obtained from CNTs having a length of 100 nm or more.
- the centrifugal pulverizer is used only for aligning the shape of the CNT to be put into a kneading apparatus described later, and does not itself change the structure such as the length and linearity of the CNT.
- the CNTs manufactured by the substrate growth thermal CVD method of the above embodiment are densely and vertically oriented, and are in a stringed state because the CNTs are connected to each other when peeled from the substrate. In the CNTs in the threaded state, mixing with the resin as a raw material becomes insufficient, and segregation of CNTs in the resin occurs, resulting in poor dispersion and remains in that state. Therefore, CNTs are pulverized and classified by a centrifugal pulverizer to obtain nano-dispersed CNTs.
- the nano-dispersion mentioned here means a state in which CNTs are physically separated one by one and are not entangled, and a ratio of aggregates in which two or more CNTs gather in a bundle is 10% or less. .
- the nano-dispersed CNT and the resin are kneaded to obtain a resin composite material.
- the concentration of the kneaded CNT is a concentration contained at 2.0% by volume or less with respect to the resin.
- the molding method of the molded specimen of the resin composite material is not particularly limited, and a general resin molding method can be used. Examples thereof include compression molding, blow molding, inflation molding, calendar molding, extrusion molding, injection molding, injection molding, and transfer molding.
- the concentration is a low concentration of 2.0% by volume or less, the share occupied by the CNT with respect to the resin is reduced as compared with the conventional one, and therefore the decrease in the mechanical strength of the resin is reduced.
- the resin viscosity is also reduced.
- the resin composite material according to the present embodiment uses CNTs having good linearity, the CNT concentration is well dispersed in the resin while having a low concentration, so the function derived from the composite of CNTs For example, high electrical conductivity and excellent mechanical strength can be expressed.
- the conductivity can be evaluated by a resistivity measured by, for example, a four-probe method.
- the number of measurement points by the four-probe method is at least 5 and 20 or less, preferably 10 or more and 15 or less.
- the number of measurement points is less than five, it is difficult to evaluate in detail the variation in conductivity of the CNT composite resin, and the size of the molded specimen is limited for the measurement of 20 points or more, and there are many measurement points. As a result, there are problems such as inefficiency and a long time for measurement.
- the resin composite material of the present embodiment is molded into a test piece, and the maximum volume resistivity measured by a four-probe method in accordance with JIS (K7194) for a predetermined 10 locations on the surface of the test piece.
- the four-probe method four needle-shaped electrodes (four-probe probes) are placed on a test piece on a straight line, a constant current is passed between the two outer probes, and the two probes are generated inside.
- This is a method of calculating the ratio r by measuring the potential difference to determine the resistance, and then multiplying the determined resistance ( ⁇ ) by the thickness t (cm) of the test piece and the correction coefficient RCF.
- the ratio r is 4.0 or less, although the amount of CNT in the resin composite material is small, it is uniformly nano-dispersed in the resin.
- the composite material can express the functions of conductivity, thermal conductivity, and mechanical strength derived from CNT, and the mechanical strength of the resin as a base material is suppressed from decreasing, and the workability is decreased due to an increase in viscosity. Reduce the occurrence of problems.
- the four-probe method has an advantage that measurement can be performed simply by pressing the electrode against a test piece.
- the resistance value to be measured is preferably a volume resistivity in which the CNT nano-dispersed state does not depend on the shape of the test piece.
- CNT is nano-dispersed. It can be combined with the resin in a state of being heated.
- CNTs are nano-dispersed, a small-sized molded product can be easily obtained. Furthermore, since the dispersion of CNT is neither excessive nor defective, and is appropriate, the aspect ratio of CNT is not reduced and the structure is not destroyed, so that the original function of CNT can be expressed.
- the conductivity (volume resistivity) of the resin composite becomes uniform even in the microscopic region.
- FIGS. 3 and 5 show SEM photographs of the conventional resin composite material
- FIGS. 4 and 6 show SEM photographs of the resin composite material of the present invention.
- 3 and 4 are 3000 times magnification
- FIGS. 5 and 6 are 10,000 times magnification.
- 6 is a CNT aggregation location
- 7 is a resin.
- the conventional resin composite material is a resin composite material in which a large amount of CNTs are used at a high concentration and there are many CNT aggregation sites 6, and there are the above-mentioned problems.
- 4 and 6 8 is CNT
- 9 is resin.
- the resin composite material of the present invention is a resin excellent in function expression because CNT8 is uniformly dispersed throughout the resin 9 and there are no aggregated portions. It is a composite material.
- Example 1 ⁇ Kneading> Weigh 2.0 g of CNT produced according to the procedure described in “Manufacturing CNT” and 52.2 g of nylon 6 pellets (A1030FR manufactured by Unitika Ltd.) as a resin. This is the concentration at which CNT is contained in the base material at 2.0% by volume.
- the weighed CNT and resin were kneaded with a kneading / extrusion evaluation test apparatus (trade name: Labo Plast Mill) manufactured by Toyo Seiki Seisakusho.
- a kneading / extrusion evaluation test apparatus (trade name: Labo Plast Mill) manufactured by Toyo Seiki Seisakusho.
- the kneading conditions are a temperature of 230 ° C., a rotation speed of 50 to 150 rpm, and a kneading time of 10 to 20 minutes.
- the resin composite material according to Example 1 was obtained by kneading.
- the resin according to Comparative Example 1 was prepared in the same procedure as in Example 1 except that only the omission of the pulverization step by a centrifugal pulverizer for the purpose of uniformizing the shape and size of CNT and removing aggregates was changed. A composite material was prepared.
- the resin composite material of Example 1 is a resin composite material obtained by combining CNTs obtained in the above ⁇ kneading> and having good dispersibility, and the CNT concentration was set to 2.0% by volume.
- the resin composite material of Comparative Example 1 is a resin composite material formed by combining CNTs with poor dispersibility, and the CNT concentration was 2.0% by volume.
- Example 1 and Comparative Example 1 were used as a test piece, and the volume resistivity at 10 locations on the surface of each test piece was measured using a 4-probe method electric resistance measurement device (manufactured by Napson Co., Ltd., model number: RG-7B / RT-70). Measured with For the measured volume resistivity, a ratio (maximum volume resistivity minimum ratio) r between the maximum value R1 and the minimum value R2 among the variations in the measured values was calculated.
- Results are shown in FIG.
- the vertical axis in FIG. 7 is the volume resistivity ( ⁇ ⁇ cm) and is shown in logarithm.
- the maximum value R1 of the volume resistivity at each of the 10 locations on the surface of Example 1 is 483 ( ⁇ ⁇ cm), and the minimum value R2 of the volume resistivity at each of the 10 locations on the surface is 124 ( ⁇ ⁇ cm).
- the average value Rave (black circle mark in the figure) of the volume resistivity at each of the 10 locations on the surface is 279 ( ⁇ ⁇ cm)
- the ratio between the maximum value R1 and the minimum value R2 (volume resistivity maximum / minimum ratio) ) R was 3.9.
- the maximum value R1 of the volume resistivity at each of the 10 locations on the surface of Comparative Example 1 is 1600 ( ⁇ ⁇ cm), and the minimum value R2 of the volume resistivity at each of the 10 locations on the surface is 81 ( ⁇ ⁇ cm).
- the average value Rave (black circle in the figure) of the volume resistivity at each of the 10 locations on the surface is 729 ( ⁇ ⁇ cm), and the ratio between the maximum value R1 and the minimum value R2 (volume resistivity maximum / minimum ratio) ) R was 19.7.
- Example 1 Comparing these, in Example 1, the CNT concentration was low, but the CNT dispersion was good and dispersed throughout the resin, and the ratio (R1 / R2) was 4.0 or less. The volume resistivity was small and the conductivity was good.
- Comparative Example 1 the CNT concentration was high, but the dispersion of CNT was poor and not dispersed throughout the resin, and the ratio (R1 / R2) was more than 4.0, and the volume resistivity The conductivity was poor.
- Example 2 A resin composite material according to Example 2 is produced in the same procedure as in Example 1 except that the resin is changed to nylon 12 pellets (model number: Daiamide L1901 manufactured by Daicel-Evonik Co., Ltd.). did.
- the resin according to Comparative Example 2 was prepared in the same procedure as in Example 2 except that only the omission of the pulverization step by a centrifugal pulverizer for the purpose of uniformizing the shape and size of CNT and removing aggregates was changed.
- a composite material was prepared.
- Example 2 was used as a test piece, and the surface resistivity at 10 locations on the surface of the test piece was measured with a four-probe electric resistance measurement device (manufactured by Napson Corporation, model number: RG-7B / RT-70). The result is shown in FIG. In FIG. 8, the vertical axis represents the surface resistivity ( ⁇ / ⁇ ), and the horizontal axis represents the CNT concentration (vol /%). From this figure, it can be seen that the surface resistivity decreases as the CNT concentration increases.
- Example 2 with a CNT concentration of 2.0 (vol /%) was used as a test piece, and the volume resistivity at 10 positions on the surface of the test piece was measured using a 4-probe method electric resistance measuring device (manufactured by Napson Corporation). Model No .: RG-7B / RT-70).
- the CNT concentration was 2.0 (vol /%), and the volume resistivity was measured in the same manner as in Example 2.
- the results are shown in FIG. 9 and FIG. 9 and 10, the vertical axis represents volume resistivity ( ⁇ ⁇ cm), and the horizontal axis represents the measurement location.
- FIG. 11A shows an SEM photograph of the resin composite material according to Example 2
- FIG. 11B shows an SEM photograph of the resin composite material according to Comparative Example 2. From this figure, it can be seen that in the resin composite material according to Example 2, the CNTs 8 are not aggregated and are uniformly dispersed throughout the resin 9. On the other hand, in the resin composite material according to Comparative Example 2, the CNT aggregation part 6 was confirmed in the resin 7.
- FIG. 12 shows an SEM photograph after etching the surface of the resin composite material according to Example 2 that was produced by atmospheric pressure plasma. Atmospheric pressure plasma was performed under the conditions of plasma system: dielectric barrier discharge (He gas), pulse voltage: 7 kV, duty ratio: 50%, frequency: 10 kHz, nozzle distance: 10 mm, and processing time: 10 minutes.
- He gas dielectric barrier discharge
- pulse voltage 7 kV
- duty ratio 50%
- frequency 10 kHz
- nozzle distance 10 mm
- processing time 10 minutes.
Abstract
Description
本発明の樹脂複合材に使用するCNTの基板成長熱CVD法による製造の一例を以下に説明する。まず、図1Aに示すように電子ビーム物理蒸着法により50mm2のシリコン基板1に下地としてAl薄膜2を30nmの膜厚で生成すると共に、このAl薄膜2上にFe薄膜3を20nmの膜厚で成膜する。この成膜ののち、直径が160mmの石英管中に前記基板1を載置したうえで、真空下、例えば200Paの減圧下で700℃で10分間加熱することで、図1Bに示すようにFe薄膜3からCNTの成長触媒となるFe微粒子41,42,…,4nを生成する。ついで、この加熱状態で石英管中にアセチレン、エチレン、メタン、プロパン、プロピレン等の炭素系ガスを所定流量100sccmで供給することで基板1のFe微粒子41~4n上にCNT51~5nを成長させる。こうして成長したCNT51~5nをシリコン基板1上から剥離して採取する。
次に、前記でナノ分散されたCNTと、樹脂とを混練して樹脂複合材を得る。この場合、混練されたCNTの濃度は、樹脂に対して2.0容積%以下で含有される濃度である。
本実施形態に係る樹脂複合材は、直線性が良好なCNTを用いていることにより、CNTの濃度が低濃度でありながら樹脂に良好に分散しているので、CNTの複合化に由来する機能、例えば高い導電性や優れた機械強度を発現することができる。CNTの複合化に由来する機能として導電性は、例えば4探針法により測定された抵抗率で評価することができる。
<混練>
上記「CNTの製造」にて説明した手順に従って作製したCNT2.0gと、樹脂としてナイロン6ペレット(ユニチカ株式会社製A1030FR)52.2gを秤量する。これは、CNTが母材中に2.0容積%で含有される濃度である。
実施例1と比較例1の樹脂複合材それぞれを神藤金属工業所製の熱プレス機(商品名:AYSR-5)を用いて、いずれも約220μmのフィルム成形体とした。
上記実施例1に対し、樹脂をナイロン12ペレット(ダイセル・エボニック(株)製、型番:ダイアミドL1901)に変えた以外は、実施例1と同様の手順で実施例2に係る樹脂複合材を作製した。比較としてCNTの形状・サイズの均一化および凝集物の除去を目的とした遠心粉砕機による粉砕工程の省略のみを変えた以外は、上記実施例2と同様の手順で、比較例2に係る樹脂複合材を作製した。
9 樹脂
Claims (6)
- 母材である樹脂に複数のCNTを複合化した樹脂複合材であって、
前記母材に対する前記CNTの濃度が2.0容積%以下であり、かつ、
前記樹脂複合材の成形試験片に対してその表面の所定複数箇所に対して4探針法で測定した体積抵抗率の最大値R1と最小値R2との比率が4.0以下であることを特徴とする樹脂複合材。 - 前記CNTは、基板成長熱CVD法により合成されたものであることを特徴とする請求項1に記載の樹脂複合材。
- 前記CNTは、形状の直線性がよい繊維長100nm以上のCNTがナノ分散処理されたCNTであることを特徴とする請求項2に記載の樹脂複合材。
- 前記CNTは、最内層の内径が3nm以上、8nm以下であり、かつ、最外層の外径が5nm以上、35nm以下の多層CNTであることを特徴とする請求項2に記載の樹脂複合材。
- 前記樹脂は、熱可塑性樹脂であることを特徴とする請求項1に記載の樹脂複合材。
- 前記CNTは、粉砕されて分級されて、前記樹脂と混練されていることを特徴とする請求項1に記載の樹脂複合材。
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US14/913,822 US20160247594A1 (en) | 2013-08-23 | 2014-08-22 | Resin composite material |
JP2015532907A JPWO2015025944A1 (ja) | 2013-08-23 | 2014-08-22 | 樹脂複合材 |
KR1020167007231A KR20160046847A (ko) | 2013-08-23 | 2014-08-22 | 수지 복합재 |
EP14838265.8A EP3037484A4 (en) | 2013-08-23 | 2014-08-22 | Resin composite material |
CN201480045659.7A CN105452388A (zh) | 2013-08-23 | 2014-08-22 | 树脂复合材料 |
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