AU2020321151A1 - Method for preparing carbon fiber cloth/tpu composite material with different stacked layers having high electromagnetic shielding performance - Google Patents
Method for preparing carbon fiber cloth/tpu composite material with different stacked layers having high electromagnetic shielding performance Download PDFInfo
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- AU2020321151A1 AU2020321151A1 AU2020321151A AU2020321151A AU2020321151A1 AU 2020321151 A1 AU2020321151 A1 AU 2020321151A1 AU 2020321151 A AU2020321151 A AU 2020321151A AU 2020321151 A AU2020321151 A AU 2020321151A AU 2020321151 A1 AU2020321151 A1 AU 2020321151A1
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- carbon fiber
- fiber cloth
- tpu
- composite material
- coupling agent
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Links
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 116
- 239000004744 fabric Substances 0.000 title claims abstract description 111
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 105
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 105
- 239000002131 composite material Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims description 21
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 20
- 239000002245 particle Substances 0.000 claims abstract description 14
- 238000000465 moulding Methods 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims description 26
- 239000007822 coupling agent Substances 0.000 claims description 20
- 238000002844 melting Methods 0.000 claims description 14
- 230000008018 melting Effects 0.000 claims description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 13
- 238000003825 pressing Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 abstract description 7
- 238000001816 cooling Methods 0.000 abstract 1
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 86
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 86
- 239000000463 material Substances 0.000 description 16
- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- 239000003921 oil Substances 0.000 description 10
- 238000004140 cleaning Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000000243 solution Substances 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 239000000835 fiber Substances 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 239000012153 distilled water Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000011231 conductive filler Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000000048 melt cooling Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229920000891 common polymer Polymers 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000011156 metal matrix composite Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/20—Making multilayered or multicoloured articles
- B29C43/203—Making multilayered articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/16—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer formed of particles, e.g. chips, powder or granules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B9/048—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material made of particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2009/00—Layered products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/42—Alternating layers, e.g. ABAB(C), AABBAABB(C)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/106—Carbon fibres, e.g. graphite fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/02—Synthetic macromolecular particles
- B32B2264/0214—Particles made of materials belonging to B32B27/00
- B32B2264/0292—Polyurethane particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/212—Electromagnetic interference shielding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Laminated Bodies (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Disclosed are a carbon fiber cloth/TPU composite material with different stacking layers having a high electromagnetic shielding performance and a preparation method therefor. The carbon fiber cloth/TPU composite material can be obtained and the preparation of the carbon fiber cloth/TPU composite material with different stacking layers can be completed by modifying the carbon fiber cloth with a silane coupling agent KH-550 and molten cooling and molding of TPU particles into a TPU plate, and then finally applying a lower pressure at a high temperature. The resulting product has characteristics such as low costs, a high strength and an excellent electromagnetic shielding performance.
Description
The present invention belongs to the field of composite material preparation,
especially relates to a method for preparing a carbon fiber cloth/TPU composite
material with different stacked layers having high electromagnetic shielding
performance.
The disclosure of the information of the background technical part is only for the
purpose of increasing the understanding of the overall background of the invention,
and is not necessarily deemed to recognize or imply in any form that the information
constitutes the prior art that has become well known to those skilled in the art.
With the rapid development of modem science and technology, wireless
communication devices have caused serious electromagnetic pollution to the
surroundings and the problem of electromagnetic pollution is becoming increasingly
prominent. Metal materials and metal matrix composite material are common
electromagnetic shielding materials in the market, but they have some shortcomings
such as high density, poor mechanical elasticity, strong corrosiveness, complicated
process and so on, so that they gradually lag behind the pace of technological
development and can hardly meet the requirements. In recent years, researchers have
found that some carbon fiber composite material have the advantages of light weight,
fatigue resistance, good shock absorption, corrosion resistance and excellent
electromagnetic shielding performance.
Carbon fiber is a new type of fiber material with high strength and high modulus,
which contains more than 95% carbon. Carbon fiber is generally combined with resin
I to form carbon fiber composite material. Carbon fiber composite materials have attracted more and more attention because of their light weight, high strength, high hardness and good heat resistance, etc. Thermoplastic polyurethane (TPU) is a common polymer material and an important material with alternating soft and hard segment characteristics, which is a biocompatible and biodegradable elastomer that has been widely used in the field of biomedical science. TPU has the advantages of good wear resistance, good processing performance, high chemical stability, and good mechanical properties, and is widely used in automotive, footwear, construction, wire and cable, hose, pipe, and other fields. Existing researches have disclosed the technical solutions of preparing TPU electromagnetic shielding composite material by surface modification of electromagnetic shielding thermoplastic polyurethane (TPU) with conductive materials or melt blending with conductive fillers, but the inventors found that: either melt blending or surface modification have the problem of poor consistency of arrangement direction of conductive filler, especially inconsistent orientation in the axial direction and poor dispersion, which limit the improvement of their electromagnetic shielding performance.
In order to overcome the above problems, the present invention provides a method for preparing carbon fiber cloth/TPU composite material with different stacked layers having high electromagnetic shielding performance. In the method, the carbon fiber cloth is modified by silane coupling agent and TPU particles are molded into TPU plates by melt cooling. Finally the carbon fiber cloth/TPU composite material can be prepared by applying a small pressure at high temperature. The products obtained by the present invention have the characteristics of low cost, high strength and excellent electromagnetic shielding performance. To achieve the above technical purpose, the technical solution adopted by the present invention is as follows: A carbon fiber cloth/TPU composite material with different stacked layers having high electromagnetic shielding performance, including: a carbon fiber cloth layer modified by coupling agent and a TPU plate, wherein the carbon fiber cloth layer modified by coupling agent and the TPU plate are alternately arranged, and the outermost layer is the TPU plate.
It is found in the present application that the electromagnetic shielding
performance of composite material can be effectively improved by setting TPU plate
as isolation layer between carbon fiber cloth layers.
It is found that the high electromagnetic shielding performance is enhanced
with the increase of the number of carbon fiber cloth layers, but the excessive
number of carbon fiber cloth layers makes the composite material thicker, difficult to
install and costly. Therefore, in some embodiments, the carbon fiber cloth layer is
1-3 layers, and the prepared carbon fiber cloth/TPU composite material has high
electromagnetic shielding performance, which can meet the requirements of
shielding effectiveness of materials required for aerospace and military electronic
instruments.
The present invention also provides a method for preparing carbon fiber
cloth/TPU composite material with different stacked layers having high
electromagnetic shielding performance, comprising:
modifying a carbon fiber cloth with coupling agent to form a carbon fiber cloth
modified with coupling agent;
molding TPU particles into TPU plates;
placing the carbon fiber clothe modified by coupling agent and TPU plate
alternately, with the outermost layer being the TPU plate, melting and pressing
together to obtain carbon fiber cloth/TPU composite material with different stacked
layers having high electromagnetic shielding performance.
In the present application, the type of coupling agent is not particularly limited.
In some embodiments, the coupling agent is selected from silane coupling agent
KH-550, KH-551, KH-560, KH-561, etc., to improve the bonding strength of carbon
fibers on TPU plates by modifying carbon fiber cloth with silane coupling agent.
In some embodiments, the specific steps of modifying the carbon fiber cloth by the coupling agent comprising: placing the carbon fiber cloth in a mixed solution of anhydrous ethanol and silane coupling agent, standing at 80-85°C for 2-2.5 hours, washing and drying to obtain the carbon fiber cloth modified with coupling agent.
The bonding strength of carbon fiber cloth and TPU is effectively enhanced, which
ensures that they can be stably bonded together after hot pressing, and at the same
time, the mechanical properties of carbon fiber cloth are also enhanced.
It is found that the shear strength of carbon fiber cloth increases with the
addition of coupling agent and the increase of the coupling agent concentration.
Therefore, in some embodiments, the mass ratio of anhydrous ethanol and silane
coupling agent is 4:1-2:1, and the prepared modified carbon fiber cloth has superior
mechanical properties and bonding strength.
In some embodiments, the molding conditions are held at 180-185°C for 20-24
minutes. TPU particles can be effectively cured and formed into TPU plates by closed
mold pressurization at this temperature.
The research of the present application shows that: for the composite of carbon
fiber cloth and the TPU plate, the hot pressing method not only has high preparation
efficiency, but also has high shielding effectiveness of the formed carbon fiber
cloth/TPU composite material. Therefore, in some embodiments, the melting and
pressing conditions are melting at 180-185 °C for 5-10 minutes, and then applying a
pressure of 0.5-0.6MPa for 5-10 minutes. The tensile strength of the prepared carbon
fiber cloth/TPU composite material can reach a maximum of 108.3 MPa, and 51-59
dB at 8.2-12.4 GHz when the composite material is three layers.
The present invention also provides carbon fiber cloth/TPU composite material
with different stacked layers having high electromagnetic shielding performance
prepared by any of the above methods.
The present invention also provides applications of the above-mentioned carbon
fiber cloth/TPU composite materials with different stacked layers having high
electromagnetic shielding performance in manufacturing of electronic devices or
communication devices.
The beneficial effects of the present invention are:
(1) In the present invention, silane coupling agent KH-550 can be used to
modify the surface of carbon fiber cloth and improve the bonding strength between
carbon fiber cloth and TPU plate, and the maximum tensile strength of three-layer
composite materials can reach 108.3 MPa.
(2) The composite materials prepared by the present invention have excellent
electromagnetic shielding performance, and the shielding effectiveness of the
three-layer composite materials can reach 51-59 dB at 8.2-12.4 GHz, which is much
higher than the commercial electromagnetic shielding standard of 20 dB and can
well meet the requirements of shielding effectiveness of materials required for
aerospace and military electronic instruments.
(3) The materials used in the present invention are carbon fiber cloth and TPU,
which have the advantage of light weight, so the composite materials prepared also
have the characteristics of light weight, which meets the requirement of lightweight.
(4) Carbon fiber cloth and TPU used in the present invention are cheap, and the
material cost is much lower than that of metal materials widely used at present.
(5) The process used in the present invention is simple and efficient, the reaction
solution can be reused many times, no other by-products are produced, no pollution to
the environment, green and environmentally friendly, and has the prospect of
large-scale industrial production.
(6) The present invention makes full use of existing equipment, so it can obtain
carbon fiber cloth/TPU composite material with high strength and excellent
electromagnetic shielding performance without increasing equipment investment,
which enhances the competitiveness of the product.
(7) The method of the present application is simple, low cost, universality and
easy scale production.
The accompanying drawings constituting a part of the present invention are
used to provide a further understanding of the present invention. The exemplary
examples of the present invention and descriptions thereof are used to explain the present invention, and do not constitute an improper limitation of the present invention.
FIG. 1 is a physical photograph of Example 1.
FIG. 2 is an X-ray photoelectron spectrogram of the carbon fiber of Example 1
after surface modification.
FIG. 3 shows the tensile strength of the carbon fiber cloth/TPU composite
material of Examples 1-3.
FIG. 4 is the electromagnetic shielding performance curve of the carbon fiber
cloth/TPU composite material of Examples 1-3.
It should be pointed out that the following detailed descriptions are all illustrative
and are intended to provide further descriptions of the present invention. Unless
otherwise specified, all technical and scientific terms used in the present invention
have the same meanings as those usually understood by a person of ordinary skill in
the art to which the present invention belongs.
It should be noted that the terms used herein are merely used for describing
specific implementations, and are not intended to limit exemplary implementations
of the present disclosure. As used herein, the singular form is also intended to
include the plural form unless the context clearly dictates otherwise. In addition, it
should further be understood that, terms "comprise" and/or "include" used in this
specification indicate that there are features, steps, operations, devices, components,
and/or combinations thereof
As described in the background, the TPU composite material has poor
electromagnetic shielding performance. The present invention proposed a method for
preparing carbon fiber cloth/TPU composite material with different stacked layers
having high electromagnetic shielding performance. In the method, the carbon fiber
cloth is modified by silane coupling agent and TPU particles are molded into TPU
plates by melt cooling. Finally, the carbon fiber cloth/TPU composite material can be
prepared by applying a small pressure at high temperature. The products obtained by the present invention have the characteristics of low cost, high strength and excellent electromagnetic shielding performance. The invention adopts the following technical solutions: in the first step, carbon fiber cloth is first placed in an Ultrasonic Cleaner for minor cleaning, and the cleaning time is 2 hours. In the second step, the cleaned carbon fiber cloth is placed in a beaker containing the mixture of anhydrous ethanol and silane coupling agent KH-550 to modify the surface of the carbon fiber cloth, and the beaker is placed in a constant temperature water bath at 80°C for 2 hours. The third step is to take out the surface modified carbon fiber cloth, clean it with distilled water, and then placed it in a drying oven for drying treatment at a drying temperature of 100°C and a drying time of 2 hours. Then take it out and seal it.
In the fourth step, TPU particles are placed in the drying oven for 2 hours for drying treatment, and the temperature is set to 100°C. In the fifth step, TPU particles are filled in the mold, and then the mold is placed on a manual tablet press machine for melting treatment. In order to prevent the molten TPU from sticking to the equipment, place a piece of oil paper on the upper and lower sides of the mold. The melting temperature is 180 0 C and the treatment time is 20 minutes. Then take it out and cool it at room temperature. At this time, TPU changed from granular to plate. In the sixth step, the modified carbon fiber cloth is placed in the middle of two TPU plates to form a sandwich shape. Then placed it in the middle of two steel plates and place a piece of oil paper on each side of the steel plate contacting with TPU plate. Then the material was melted at 180 0C for 5 minutes, and then the pressure of 0.5 MPa was applied for 5 minutes to complete the carbon fiber cloth/TPU composite material with a layer of carbon fiber cloth. In the seventh step, the modified carbon fiber cloth and TPU plate are alternately placed in the middle, wherein the carbon fiber cloth has two layers and the TPU plate has three layers. Then place it in the middle of two steel plates, and place a piece of oil paper on each side of the steel plate contacting with TPU plate. Then the material was melted at 180°C for 7 minutes, and then the pressure of 0.5 MPa was applied for
8 minutes to complete the carbon fiber cloth/TPU composite material with two layers
of carbon fiber cloth.
In the eighth step, the modified carbon fiber cloth and TPU plate are alternately
placed in the middle, wherein the carbon fiber cloth has three layers and the TPU
board has four layers. Then place it in the middle of two steel plates, and place a piece
of oil paper on each side of the steel plate contacting with TPU plate. Then the
material was melted at 180°C for 10 minutes, and then the pressure of 0.5 MPa was
applied for 10 minutes to complete the carbon fiber cloth/TPU composite material
with three layers of carbon fiber cloth.
The concentration of the anhydrous ethanol is 99.97%.
The content ratio of the anhydrous ethanol and the silane coupling agent
KH-550 in the mixed solution is 4: 1.
Only one, two and three layers of the different stack layers are considered in the
present invention.
The above-mentioned method is not only suitable for the preparation of carbon
fiber cloth/TPU composite materials with one, two or three layers of carbon fiber
cloth, but also suitable for the preparation of carbon fiber cloth/TPU composite
materials with other layers of carbon fiber cloth.
In the preparation method of the above-mentioned carbon fiber cloth/TPU
composite materials with different stacked layers, the raw materials used are obtained
through commercial purchase and the equipment used is well known in the technical
field. The technical solution of the present application is described below through
specific examples.
Wherein, the tensile strength test standard is ASTM D3039/D 3039M-00.
Electromagnetic shielding performance is tested by vector network analyzer.
In the following examples, the thickness of the carbon fiber cloth used is 0.2 mm,
and the thickness of the prepared carbon fiber cloth/TPU composite materials is controlled to be 1.5 0.1 mm. Example 1
In the first step, carbon fiber cloth was first placed in an Ultrasonic Cleaner for
minor cleaning, and the cleaning time was 2 hours.
In the second step, the cleaned carbon fiber cloth was placed in a beaker
containing the mixture of anhydrous ethanol and silane coupling agent KH-550 (the
mass ratio of anhydrous ethanol to silane coupling agent KH-550 was 4: 1) to modify
the surface of the carbon fiber cloth, and the beaker was placed in a constant
temperature water bath at 80°C for 2 hours.
The third step was to take out the surface modified carbon fiber cloth, clean it
with distilled water, and then placed it in a drying oven for drying treatment at a
drying temperature of 100°C and a drying time of 2 hours. Then take it out and seal
it.
In the fourth step, TPU particles were placed in the drying oven for 2 hours for
drying treatment, and the temperature was set to100°C.
In the fifth step, TPU particles were filled in the mold, and then the mold was
placed on a manual tablet press machine for melting treatment. In order to prevent the
molten TPU from sticking to the equipment, place a piece of oil paper on the upper
and lower sides of the mold. The melting temperature was 1800 C and the treatment
time was 20 minutes. Then take it out and cool it at room temperature. At this time,
TPU changed from granular to plate. In the sixth step, the modified carbon fiber cloth was placed in the middle of two TPU plates to form a sandwich shape. Then placed it in the middle of two steel plates and place a piece of oil paper on each side of the steel plate contacting with TPU plate. Then the material was melted at 180 0C for 5 minutes, and then the pressure of 0.5 MPa was applied for 5 minutes to complete the carbon fiber cloth/TPU composite material with a layer of carbon fiber cloth. FIG. 2 was an X-ray photoelectron spectroscopy of the surface of carbon fiber cloth treated with silane coupling agent KH-550. It can be seen that there was a peak of silicon element, but there was no silicon element on the surface of the untreated carbon fiber cloth, so the surface of the carbon fiber cloth after the above treatment can be successfully modified, and the silicon element in silane coupling agent KH-550 can be successfully grafted on the surface of carbon fiber cloth. Example 2 In the first step, carbon fiber cloth was first placed in an Ultrasonic Cleaner for minor cleaning, and the cleaning time was 2 hours. In the second step, the cleaned carbon fiber cloth was placed in a beaker containing the mixture of anhydrous ethanol and silane coupling agent KH-550 (the mass ratio of anhydrous ethanol to silane coupling agent KH-550 was 4: 1) to modify the surface of the carbon fiber cloth, and the beaker was placed in a constant temperature water bath at 80°C for 2 hours. The third step was to take out the surface modified carbon fiber cloth, clean it with distilled water, and then placed it in a drying oven for drying treatment at a drying temperature of 100C and a drying time of 2 hours. Then take it out and seal it. In the fourth step, TPU particles were placed in the drying oven for 2 hours for drying treatment, and the temperature was set to 100°C. In the fifth step, TPU particles were filled in the mold, and then the mold was placed on a manual tablet press machine for melting treatment. In order to prevent the molten TPU from sticking to the equipment, place a piece of oil paper on the upper and lower sides of the mold. The melting temperature was 1800 C and the treatment time was 20 minutes. Then take it out and cool it at room temperature. At this time, TPU changed from granular to plate. In the sixth step, the modified carbon fiber cloth and TPU plate were alternately placed in the middle, wherein the carbon fiber cloth had two layers and the TPU plate had three layers. Then place it in the middle of two steel plates, and place a piece of oil paper on each side of the steel plate contacting with TPU plate. Then the material was melted at 180 0C for 7 minutes, and then the pressure of 0.5 MPa was applied for 8 minutes to complete the carbon fiber cloth/TPU composite material with two layers of carbon fiber cloth. Example 3
In the first step, carbon fiber cloth was first placed in an Ultrasonic Cleaner for minor cleaning, and the cleaning time was 2 hours.
In the second step, the cleaned carbon fiber cloth was placed in a beaker containing the mixture of anhydrous ethanol and silane coupling agent KH-550 (the mass ratio of anhydrous ethanol to silane coupling agent KH-550 was 4: 1) to modify the surface of the carbon fiber cloth, and the beaker was placed in a constant temperature water bath at 80°C for 2 hours. The third step was to take out the surface modified carbon fiber cloth, clean it with distilled water, and then placed it in a drying oven for drying treatment at a drying temperature of 100C and a drying time of 2 hours. Then take it out and seal it. In the fourth step, TPU particles were placed in the drying oven for 2 hours for drying treatment, and the temperature was set to 100°C. In the fifth step, TPU particles were filled in the mold, and then the mold was placed on a manual tablet press machine for melting treatment. In order to prevent the molten TPU from sticking to the equipment, place a piece of oil paper on the upper and lower sides of the mold. The melting temperature was 1800 C and the treatment time was 20 minutes. Then take it out and cool it at room temperature. At this time, TPU changed from granular to plate. In the sixth step, the modified carbon fiber cloth and TPU plate were alternately placed in the middle, wherein the carbon fiber cloth had three layers and the TPU board had four layers. Then place it in the middle of two steel plates, and place a piece of oil paper on each side of the steel plate contacting with TPU plate. Then the material was melted at 180 0C for 10 minutes, and then the pressure of 0.5 MPa was applied for 10 minutes to complete the carbon fiber cloth/TPU composite material with three layers of carbon fiber cloth, and the thickness was 1.5 mm. The test results show that the tensile strength of the three-layer composite material is 108.3 MPa and the electromagnetic shielding performance is 59 dB at 8.2-12.4 GHz. Finally, it should be noted that the above description is only preferred embodiments of the present invention and is not intented to limit the present invention.
Although the present invention has been described in detail with reference to the
above embodiments, it is still possible for those skilled in the art to modify the
technical solution described in the foregoing embodiments, or to replace some of them
equivalently. Any modification, equivalent replacement, improvement, etc. made
within the spirit and principles of the present invention shall be included in the
protection scope of the present invention. Although the specific implementation mode
of the present invention is described above, however, it is not a restriction on the
scope of protection of the present invention rights. Technicians in the field should
understand that on the basis of the present invention's technical solution, various
modifications or deformations that technicians in the field can make without creative
labor are still within the scope of protection of the present invention.
Claims (9)
- CLAIMS 1. A carbon fiber cloth/TPU composite material with different stacked layershaving high electromagnetic shielding performance, comprising: a carbon fiber clothlayer modified by coupling agent and a TPU plate, wherein the carbon fiber clothlayer modified by coupling agent and the TPU plate are alternately arranged, and anoutermost layer is the TPU plate;the carbon fiber cloth layer is 1-3 layers.
- 2. A method for preparing carbon fiber cloth/TPU composite material withdifferent stacked layers having high electromagnetic shielding performance,comprising:modifying a carbon fiber cloth with coupling agent to form a carbon fiber clothmodified with coupling agent;molding TPU particles into TPU plates; andplacing the carbon fiber clothe modified by coupling agent and TPU platealternately, with the outermost layer being the TPU plate, melting and pressingtogether to obtain carbon fiber cloth/TPU composite material with different stackedlayers having high electromagnetic shielding performance.
- 3. The method for preparing carbon fiber cloth/TPU composite materialaccording to claim 2, wherein the coupling agent is selected from silane couplingagent KH-550, KH-551, KH-560 and KH-561.
- 4. The method for preparing carbon fiber cloth/TPU composite materialaccording to claim 2, wherein the specific steps of modifying the carbon fiber cloth bythe coupling agent comprising: placing the carbon fiber cloth in a mixed solution ofanhydrous ethanol and silane coupling agent, standing at 80-85°C for 2-2.5 hours,washing and drying to obtain the carbon fiber cloth modified with coupling agent.
- 5. The method for preparing carbon fiber cloth/TPU composite materialaccording to claim 4, the mass ratio of anhydrous ethanol and silane coupling agent is4:1-2:1.
- 6. The method for preparing carbon fiber cloth/TPU composite material according to claim 2, wherein the molding conditions are held at 180-185 0 C for 20-24 minutes.
- 7. The method for preparing carbon fiber cloth/TPU composite material according to claim 2, wherein the melting and pressing conditions are melting at 180-185 0C for 5-10 minutes, and then applying a pressure of 0.5-0.6MPa for 5-10 minutes.
- 8. A carbon fiber cloth/TPU composite material with different stacked layers having high electromagnetic shielding performance prepared by the method according to any one of claims 2-7.
- 9. Application of the carbon fiber cloth/TPU composite material with different stacked layers having high electromagnetic shielding performance according to claim 1 in manufacturing of electronic devices or communication devices.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910701955.2A CN110450488B (en) | 2019-07-31 | 2019-07-31 | Preparation method of different stacked-layer carbon fiber cloth/TPU composite material with high electromagnetic shielding performance |
| CN201910701955.2 | 2019-07-31 | ||
| PCT/CN2020/105899 WO2021018257A1 (en) | 2019-07-31 | 2020-07-30 | Method for preparing carbon fiber cloth/tpu composite material with different stacking layers having high electromagnetic shielding performance |
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| CN110450488B (en) * | 2019-07-31 | 2020-07-28 | 山东大学 | Preparation method of different stacked-layer carbon fiber cloth/TPU composite material with high electromagnetic shielding performance |
| CN111923554B (en) * | 2020-08-18 | 2022-03-15 | 山东大学 | Composite material with high flexibility and mechanical property and preparation method and application thereof |
| CN114163773A (en) * | 2021-10-30 | 2022-03-11 | 贵州通用航空有限责任公司 | High-stability carbon fiber cloth coating material for light aircraft and manufacturing method thereof |
| CN114986774B (en) * | 2022-05-19 | 2023-03-21 | 华南理工大学 | Staggered lamination hot pressing method for preparing metal wire mesh/high polymer material composite |
| CN115195239A (en) * | 2022-06-29 | 2022-10-18 | 福建思嘉环保材料科技有限公司 | Flexible carbon fiber composite material and preparation method thereof |
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| US20030029059A1 (en) * | 2001-01-09 | 2003-02-13 | Favreau Christopher D. | Biomechanical sole unit |
| JP2003245991A (en) * | 2002-02-27 | 2003-09-02 | Toho Tenax Co Ltd | Laminated sheet and clothing for electromagnetic shielding using the same and molded product |
| CN101309959A (en) * | 2005-10-24 | 2008-11-19 | Ocv智识资本有限责任公司 | Long fiber thermoplastic process for conductive composites and composites formed thereby |
| CN102049895A (en) * | 2009-10-28 | 2011-05-11 | 瑞鸿复材企业股份有限公司 | Continuous fiber laminated plate and preparation method thereof |
| CN104325757A (en) * | 2013-07-22 | 2015-02-04 | 上海杰事杰新材料(集团)股份有限公司 | Carbon fiber reinforced epoxy resin sandwich composite material and preparation method and use thereof |
| CN104325756A (en) * | 2013-07-22 | 2015-02-04 | 上海杰事杰新材料(集团)股份有限公司 | Carbon fiber reinforced composite material used for notebook housing and preparation method thereof |
| CN103552347A (en) * | 2013-10-29 | 2014-02-05 | 鑫永铨股份有限公司 | Manufacturing method of fibre reinforced plate material |
| CN105199368B (en) * | 2015-10-23 | 2018-06-26 | 上海交通大学 | A kind of modified carbon fiber enhancing Thermoplastic polyurethane composite material and preparation method thereof |
| CN106810845B (en) * | 2015-12-01 | 2019-11-15 | 福懋兴业股份有限公司 | Soft carbon fibre composite and its manufacturing method with solid grain surface |
| CN105566892A (en) * | 2016-03-08 | 2016-05-11 | 苏州珍展科技材料有限公司 | Modified carbon fiber/polyurethane composite material and preparation method thereof |
| CN107351469A (en) * | 2017-07-21 | 2017-11-17 | 吉林大学 | Carbon fiber reinforced polymer-based composite board and preparation method thereof |
| TW201925281A (en) * | 2017-11-22 | 2019-07-01 | 上緯企業股份有限公司 | Method of manufacturing multi-layer thermoplastic composite sheet with continuous-discontinuous fibers |
| CN108250726A (en) * | 2018-01-15 | 2018-07-06 | 东莞市安拓普塑胶聚合物科技有限公司 | A kind of fire-retardant TPU cable jacket materials with electro-magnetic screen function and preparation method thereof |
| CN110450488B (en) * | 2019-07-31 | 2020-07-28 | 山东大学 | Preparation method of different stacked-layer carbon fiber cloth/TPU composite material with high electromagnetic shielding performance |
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| WO2021018257A1 (en) | 2021-02-04 |
| CN110450488A (en) | 2019-11-15 |
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