TW201235500A - Carbon fiber article having anti-fingerprinting property and method for making same - Google Patents

Abstract

The present disclosure provides a carbon fiber article having nice anti-fingerprinting property and a method for making the carbon fiber article. The carbon fiber article includes a substrate and an anti-fingerprinting coat formed on the substrate. The anti-fingerprinting coat is a CFx coat with the x value being more than 0 and less than 2.5. The method for making the carbon fiber article includes: providing a carbon fiber substrate; forming a CFx coat on the carbon fiber substrate by vacuum sputtering, with graphite as taget and CF4 as reacting gases.

Description

201235500 VI. Description of the Invention: [Technical Field] The present invention relates to a carbon fiber article and a method of producing the same, and more particularly to a carbon fiber article having an anti-fingerprint function and a method of preparing the carbon fiber article. [Prior Art] [0002] Infiltration, such as hydrophobic oleophobicity, is an important feature of a solid surface, which can bring great convenience to people's lives. 〇[0003] Carbon fiber material is a kind of excellent material with low density, high specific modulus, high specific strength, high temperature resistance and corrosion resistance. It has been widely used in electronic housings, 乂通交通, aerospace. In aviation products and building materials. Generally, the carbon fiber materials of the above applications do not have hydrophobic oleophobicity (or anti-fingerprint function). In order to achieve the hydrophobic function of the carbon fiber material, the carbon fiber obtained has a hydrophobic function by extending the carbonization time to 1-4 hours (carbonization temperature 900-1600 ° C) during the formation of the carbon fiber. However, the method of extending the carbonization time to achieve the hydrophobic function undoubtedly consumes a large amount of energy, resulting in a great increase in cost, compared to the case where the conventional carbonization time takes only a few minutes to ten minutes. SUMMARY OF THE INVENTION [0005] In view of the above, it is necessary to provide a carbon fiber article which is less expensive and has an anti-fingerprint function. Further, it is also necessary to provide a method of producing the above carbon fiber article. [0007] A carbon fiber article comprising a carbon fiber substrate and an anti-fingerprint layer formed on the surface of the carbon fiber 100105322 Form No. A0101, which is a carbon fluoride layer, The fluorinated carbon has a chemical formula of CF, wherein 0 < x < 2.5.

X

[0008] A method for preparing a carbon fiber article, comprising the steps of: [0009] providing a carbon fiber matrix; [0010] using a graphite target as a target, using carbon tetrafluoride gas as a reaction gas, using magnetron sputtering coating The method of depositing a carbon fluoride anti-fingerprint layer on the surface of the carbon fiber substrate, the chemical formula of the carbon fluoride is CF, wherein 0 < x < 2.5.

X

[0011] The carbon fiber product can achieve better anti-fingerprint function by magnetron sputtering coating on the surface of a conventional carbon fiber substrate to form a carbon fluoride (CFx) anti-fingerprint function, compared with the prior art. It avoids the consumption of huge energy and reduces the cost. [Embodiment] Referring to Figure 1, a carbon fiber article 10 according to a preferred embodiment of the present invention comprises a carbon fiber substrate 11 and an anti-fingerprint layer 13 formed on the carbon fiber substrate 11. The carbon fiber product 10 can be a housing of a portable electronic device, a material for a vehicle tool, a material for aerospace products, or a material for construction. [0013] The carbon fiber substrate 11 can be obtained by a conventional method for preparing carbon fibers. [0014] The anti-fingerprint layer 13 is a carbon fluoride layer having a chemical formula of CF.

0 in 0 < x < 2. 5. The anti-fingerprint layer 13 can be formed by a magnetron sputtering coating method. The anti-fingerprint layer 13 is a nano-scale amorphous structure having a thickness of 600-800 nm. [0015] The carbon fiber product 10 was subjected to a water-oil contact angle test, and the result was 100105322, Form No. A0101, Page 4/12, 1002009150-0 201235500, and the contact angle of the anti-fingerprint layer 13 with the water-oil mixture was 1 Between 08-1 and 8 °, the carbon fiber article 10 was demonstrated to have good anti-fingerprint function. [0016] A method of preparing a carbon fiber article 10 according to a preferred embodiment of the present invention includes the following steps: [0017] A carbon fiber substrate 11 is provided, and the carbon fiber substrate 11 is subjected to a pre-cleaning treatment. The pre-cleaning treatment may be carried out by ultrasonically cleaning the carbon fiber substrate 11 in an ultrasonic cleaner containing a acetone solution to remove impurities, oil stains, and the like on the surface of the carbon fiber wiki. [0018] The surface of the carbon fiber substrate 11 subjected to the above pre-cleaning treatment is subjected to plasma cleaning to further remove the dirt on the surface of the carbon fiber substrate 11, and to improve the bonding force between the surface of the carbon fiber substrate 11 and the subsequent plating layer. Referring to FIG. 2, the carbon fiber substrate 11 is placed in a coating chamber 21 of a magnetron sputtering coater 20, and a graphite target 23 is loaded. The working chamber 21 is evacuated to a vacuum of 3.00×10 5 Torr, and then a working gas of argon gas (purity of 99.999%) is introduced at a flow rate of 300-500 sccm (standard milliliter per minute), and the carbon fiber substrate 11 is applied. A bias voltage of -200 - 300V is applied to generate a high frequency voltage in the coating chamber 21. The argon gas is plasmad at a high frequency voltage to generate a high energy argon plasma, and the high energy argon plasma physically bombards the surface of the carbon fiber substrate 11 to remove the dirt on the surface of the carbon fiber substrate 11 to achieve cleaning. purpose. The plasma cleaning time can be 5-10 minutes. [0020] After the plasma cleaning is completed, the anti-fingerprint layer 13 is sputtered on the surface of the carbon fiber substrate 11 by a magnetron sputtering coating method such as an intermediate frequency magnetron sputtering coating method in the coating chamber 21. When the anti-fingerprint layer 13 is sputtered, the coating chamber 21 is heated to a temperature of 1 50-240 ° C (ie, the sputtering temperature is 1 50-240 ° C). 100105322 Form No. A0101 Page 5 of 12 1002009150- 0 201235500 'Adjust the flow sound of argon 6〇-2〇OSCC_w'〇-450sccm ' The flow rate is the bias of the substrate 11 to /, the body is tetrafluorinated, the fiber is turned on, and the graphite (4) is turned on, 3〇〇 V, the duty cycle of the partial is 3〇,%, electricity and "chemical, the electricity, at this time, the tetrafluoride body produces a glow dehydration of the tetrafluoride and the graphite%23 minus the sub-reaction An anti-fingerprint layer 13 is formed on the surface of the carbon fiber substrate 11 to be deposited. The anti-fingerprint layer 13 is a CFx layer, where 0 < Χ < 2.5. The time for depositing the anti-fingerprint layer 13 is 38-60 minutes. The graphite stem 23 can be controlled by an intermediate frequency power source with a power of 8 _ 1 〇 kW. The anti-fingerprint layer 13 is a nano-order amorphous structure 'having a thickness between 6 Ο 0 and 8 ΟΘ η ® . [0022] [0025] [0026] [0026] The method for preparing the carbon fiber product 10 and the anti-fingerprint performance of the carbon fiber article 10 will be described below in conjunction with specific embodiments. The pre-treatments in the various embodiments are performed in the manner disclosed above and will not be described in detail herein. Example 1 Plasma cleaning: argon gas flow rate was 500 sccm 'The breaking capacity of the broken fiber substrate 11 was -200 V, and the plasma cleaning time was 8 minutes; Preparation of a carbon fluoride (CFx) layer to form an anti-fingerprint layer 13: Argon gas The flow rate is 330sccm, the flow rate of carbon tetrafluoride gas is 7〇scc® 'The bias of the wind fiber matrix 11 is -175V, the power of the graphite target 23 is 8kW' and the deactivation temperature is 15 (TC, the sputtering time is 4 minutes, the thickness of the anti-fingerprint layer 3 is 620 nm, wherein the value of X in CF is 1.5.

X The contact angle of the anti-fingerprint layer 13 and the water-oil mixture prepared by the method of this example was 108°. Embodiment 2 100105322 Form No. A0101 1002009150-0 201235500 [0028] [0029] [0032] [0033] [0034] Plasma cleaning: argon flow rate is 500 sccm 'carbon fiber matrix 11 The bias voltage is -200V, and the plasma cleaning time is 8 minutes; the carbon fluoride (CF) layer is prepared to form the anti-fingerprint layer 13: the flow rate of argon gas is 33 〇sccm, and the flow rate of carbon tetrafluoride gas is 95 sccm 'carbon fiber The bias voltage of the substrate 11 was -175 V. The power of the graphite dry * 23 was 8 kW. The sputtering temperature was 150 ° C, and the sputtering time was minutes. The thickness of the anti-fingerprint layer 13 was 680 nm. Among them, the value of X in CF is 8.

8°。 The contact angle of the anti-fingerprint layer 13 and the water-oil mixture prepared by the method of the present embodiment is 112. 8 °. Example 3 Plasma cleaning: argon gas flow rate was 5 〇〇sccm' carbon fiber substrate 11 was biased at -200 V, plasma cleaning time was 8 minutes; and carbon fluoride (CF) layer was prepared to form anti-finger layer 13 : Argon flow rate is

X 330sccm, the flow rate of the carbon tetrafluoride gas is 150sccm 'The bias of the carbon fiber substrate 11 is _175V 'The power of the graphite 23 is 9kW' The deactivation temperature is 20 (TC, the sputtering time is minute, the anti-fingerprint layer 13 The thickness of X in CF is 2.2.

X The contact angle of the anti-fingerprint layer 13 and the water-oil mixture prepared by the method of this example was 120°. The fiber-resistant product 1 is formed by magnetron sputtering coating on the surface of the conventional carbon fiber substrate 11 to form a carbon fluoride (CFx) anti-fingerprint layer 13' to achieve better anti-fingerprint function. Technology 'avoids huge energy consumption and reduces costs. 100105322 Form No. A0101 Page 7 of 12 1002009150-0 201235500 [0035] In addition, various modifications in form and detail may be made by those skilled in the art within the scope and spirit of the disclosure of the invention. Add and replace. It is a matter of course that various modifications, additions and substitutions made in accordance with the spirit of the invention are included in the scope of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS [0036] FIG. 1 is a schematic cross-sectional view of a carbon fiber article in accordance with a preferred embodiment of the present invention. 2 is a top plan view of a magnetron sputtering coating machine in accordance with a preferred embodiment of the present invention. [Main component symbol description] [0038] Carbon fiber product: 10 [0039] Carbon fiber substrate: 11 [0040] Anti-fingerprint layer: 13 [Deleted 1] Magnetron sputtering coating machine: 20 [0042] Coating chamber: 21 [0043] Graphite target: 2 3 100105322 Form number A0101 Page 8 / Total 12 pages 1002009150-0

Claims (1)

201235500 VII. Patent Application Range: 1. A carbon fiber product comprising a carbon fiber matrix, the improvement comprising: the carbon fiber product further comprising an anti-fingerprint layer formed on a surface of the carbon fiber substrate, the anti-fingerprint layer being a carbon fluoride layer, The chemical formula of carbon fluoride is CF, where 0 X ' < X < 2. 5. 2. The carbon fiber article of claim 1, wherein the anti-finger layer is a nano-scale amorphous structure having a thickness of 600-800 nm. 3. The carbon fiber article of claim 1, wherein the anti-finger layer is formed by magnetron sputtering. 4. The carbon fiber article of claim 1, wherein the anti-finger layer has a contact angle with the water-oil mixture of between 1 08 and 10.8. 5. The carbon fiber article of claim 1, wherein the carbon fiber article is a housing of a portable electronic device, a vehicle housing material, aerospace product material, or a building material. 6 . A method for preparing a carbon fiber product, comprising the steps of: providing a carbon fiber matrix; using graphite as a material, and using four #L carbon gas as a reaction gas; using a magnetron sputtering coating method on the carbon fiber substrate An anti-fingerprint layer of carbon fluoride is deposited on the surface, and the chemical formula of the carbon fluoride is CF, wherein 0 < x < 2.5. The method for preparing a carbon fiber article according to claim 6, wherein the anti-fingerprint layer is sputtered to a carbon fiber substrate with a bias of -50 to -300 V, and a duty ratio of the bias is 30-50. %, the sputtering temperature is 1 50-240 ° C, the flow rate of carbon tetrafluoride is 60-2 OOsccm, the working gas is argon gas, the flow rate of argon gas is 300-450 sccm, and the power of graphite dry is 8-10 kW. The plating time is 38-60 minutes. The method for preparing a carbon fiber article according to claim 6, wherein the preparation method further comprises: carbon fiber substrate before sputtering the anti-fingerprint layer; The steps of pre-cleaning and plasma cleaning. 9. The method for preparing a carbon fiber article according to claim 8, wherein the plasma cleaning uses argon as a working gas, the flow rate of argon gas is 300-500 sccm, and the carbon fiber substrate is applied with -200 to -300 V. The bias voltage and plasma cleaning time are 5-10 minutes. 100105322 Form No. A0101 Page 10 of 12 1002009150-0