CN101597862B - Method for improving carbon fiber surface activity - Google Patents
Method for improving carbon fiber surface activity Download PDFInfo
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- CN101597862B CN101597862B CN2009100163737A CN200910016373A CN101597862B CN 101597862 B CN101597862 B CN 101597862B CN 2009100163737 A CN2009100163737 A CN 2009100163737A CN 200910016373 A CN200910016373 A CN 200910016373A CN 101597862 B CN101597862 B CN 101597862B
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- carbon fiber
- polyvinyl alcohol
- alcohol aqueous
- surface activity
- concentration
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Abstract
The invention discloses a method for improving carbon fiber surface activity, which is implemented by firstly soaking carbon fiber beam in polyvinyl alcohol aqueous solution at normal temperature for 7-10min and then drying in a drying furnace; and finally soaking the dried carbon fiber beam in ethoxyline resin 648 solution and taking out. The drying temperature is 100-120 DEG C, the drying time is 7-10min, the concentration of the polyvinyl alcohol aqueous is 0.24-0.64% and the concentration of ethoxyline resin 648 is 2.4-6.4%.The invention adopts polyvinyl alcohol aqueous as the initiation system, performs stem grafting on the surface of the carbon fiber, so that the surface activity of the carbon fiber is strengthened, lyophobic property is changed into lyophilic property, the surface is uneven, polymerization with ethoxyline resin is easier, the polymerization of polyvinyl alcohol aqueous and ethoxyline resin causes a layer of firm protection film to be formed on the surface of each filament of carbon fiber, thus improving the cutting strength of carbon fiber composite material. The invention features simple operation, low cost, no pollution to environment and convenience for industrialized production.
Description
Technical field
The present invention relates to a kind of process for modifying surface of composite material reinforcement body, especially a kind of induced grafting improves the method for carbon fiber surface activity.
Background technology
Carbon fiber does not use separately usually, basically all is to use after processing composite with resin compounded.Because carbon fiber filament diameter little (5-7 μ), the cross section is 1cm
3Carbon fiber bundle two contact area up to 3000cm
3More than, big contact area like this, the quality of its bonding degree directly has influence on the interlaminar shear strength of composite.Because carbon fibre surface energy is low, less than 45 dyne, the edge active atoms of carbon is few; The surface demonstrates lyophobicity; Generally only below 60Mpa, having satisfied not the carbon fibre composite shear strength should be greater than the requirement more than the 90Mpa for not surface treated carbon fiber and resin-bonded bad, the shear strength of the carbon fibre composite of processing; Therefore, improve carbon fiber surface activity and become one of research topic.At present, the main method of raising carbon fiber surface activity has ozone method, electrolysis, plasma processing etc.
Summary of the invention
The technical problem that the present invention will solve provides a kind of method of new raising carbon fiber surface activity, to improve the shear strength of carbon fibre composite.
For solving the problems of the technologies described above, the present invention includes following steps: be dipping 7-10 minute in the polyvinyl alcohol water solution of 0.24%-0.64% with carbon fiber bundle in concentration under the normal temperature at first, in drying oven, dry then; Carbon fiber bundle after last normal temperature will be dried down soaks into, takes out in concentration is epoxy resin 648 solution of 2.4%-6.4%.
Described bake out temperature is 100-120 ℃, and drying time is 7-10 minute.
The carbon fiber bundle that adopts said method to handle uses polyvinyl alcohol as initiator system, in the carbon fiber surface grafting; Carbon fiber surface activity is strengthened; Become lyophily by lyophobicity, surface irregularity is with epoxy resin polymerization more easily; Polyvinyl alcohol and polymerization of epoxy resins make every monofilament surface of carbon fiber form the firm diaphragm of one deck, have improved the shear strength of carbon fibre composite.The present invention simultaneously is simple to operate, with low cost, and environmentally safe, is convenient to suitability for industrialized production, and can carries out synchronously with carbon fiber production.
The specific embodiment
Embodiment 1
Under the normal temperature, be dipping 10 minutes in 0.24% the polyvinyl alcohol water solution in concentration, in temperature is 120 ℃ drying oven, dry 7 minutes time then carbon fiber bundle; Carbon fiber bundle after last normal temperature will dry down soaks into, takes out in concentration is 2.4% epoxy resin 648 solution, carries out next step production, and carbon fibre composite shear strength after treatment reaches 116Mpa.The present invention adopts polyvinyl alcohol as initiator system, in the carbon fiber surface grafting, carbon fiber surface activity is strengthened; Become lyophily by lyophobicity; Surface irregularity, with epoxy resin polymerization more easily, polyvinyl alcohol and polymerization of epoxy resins make every monofilament surface of carbon fiber form the firm diaphragm of one deck; Improved the shear strength of carbon fibre composite, down together.
Embodiment 2
Under the normal temperature, be dipping 7 minutes in 0.64% the polyvinyl alcohol water solution in concentration, in temperature is 100 ℃ drying oven, dry 10 minutes time then carbon fiber bundle; Carbon fiber bundle after last normal temperature will dry down soaks into, takes out in concentration is 5% epoxy resin 648 solution, carries out next step production, and carbon fibre composite shear strength after treatment reaches 116Mpa.
Embodiment 3
Under the normal temperature, be dipping 9 minutes in 0.5% the polyvinyl alcohol water solution in concentration, in temperature is 110 ℃ drying oven, dry 8 minutes time then carbon fiber bundle; Carbon fiber bundle after last normal temperature will dry down soaks into, takes out in concentration is 6.4% epoxy resin 648 solution, carries out next step production, and carbon fibre composite shear strength after treatment reaches 116Mpa.
Claims (1)
1. method that improves carbon fiber surface activity; It is characterized in that may further comprise the steps: be dipping 7-10 minute in the polyvinyl alcohol water solution of 0.24%-0.64% with carbon fiber bundle in concentration under the normal temperature at first; In drying oven, dry then; Described bake out temperature is 100-120 ℃, and drying time is 7-10 minute; Carbon fiber bundle after last normal temperature will be dried down soaks into, takes out in concentration is epoxy resin 648 solution of 2.4%-6.4%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100163737A CN101597862B (en) | 2009-06-18 | 2009-06-18 | Method for improving carbon fiber surface activity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100163737A CN101597862B (en) | 2009-06-18 | 2009-06-18 | Method for improving carbon fiber surface activity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101597862A CN101597862A (en) | 2009-12-09 |
| CN101597862B true CN101597862B (en) | 2012-08-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100163737A Expired - Fee Related CN101597862B (en) | 2009-06-18 | 2009-06-18 | Method for improving carbon fiber surface activity |
Country Status (1)
| Country | Link |
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| CN (1) | CN101597862B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110451633A (en) * | 2019-08-19 | 2019-11-15 | 苏州永沁泉智能设备有限公司 | A kind of super hydrophilic bio-compatible carbon fiber and without sludge MBR sewage disposal system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098560A (en) * | 1993-08-03 | 1995-02-08 | 中国科学院长春应用化学研究所 | Activation method of carbon fibre electrode material |
| CN1851108A (en) * | 2006-05-23 | 2006-10-25 | 哈尔滨工业大学 | Method for improving carbonfiber surface activity |
| CN101351583A (en) * | 2005-09-16 | 2009-01-21 | 阿斯特里姆有限公司 | Method for enhancing adherence of carbon fibers with respect to an organic matrix |
-
2009
- 2009-06-18 CN CN2009100163737A patent/CN101597862B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098560A (en) * | 1993-08-03 | 1995-02-08 | 中国科学院长春应用化学研究所 | Activation method of carbon fibre electrode material |
| CN101351583A (en) * | 2005-09-16 | 2009-01-21 | 阿斯特里姆有限公司 | Method for enhancing adherence of carbon fibers with respect to an organic matrix |
| CN1851108A (en) * | 2006-05-23 | 2006-10-25 | 哈尔滨工业大学 | Method for improving carbonfiber surface activity |
Non-Patent Citations (2)
| Title |
|---|
| JP平1-314786A 1989.12.19 |
| JP特开2008-2046A 2008.01.10 |
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| CN101597862A (en) | 2009-12-09 |
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Owner name: TIANHUA YIWEI SPECIAL FIBER (XINTAI) CO., LTD. Free format text: FORMER OWNER: WEIFANG HUAPING CARBON FIBRE CO., LTD. Effective date: 20101214 |
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Free format text: CORRECT: ADDRESS; FROM: 261318 DEVELOPMENT ZONE, LIJIABU, BEIMENG TOWN, CHANGYI CITY, SHANDONG PROVINCE TO: 271200 NO.509, LIANHUASHAN ROAD, XINTAI CITY, SHANDONG PROVINCE |
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Effective date of registration: 20101214 Address after: 271200 No. 509 Lianhua Mountain Road, Shandong, Xintai Applicant after: CTH_China Tian Hua Special Fibers Ltd. Address before: 261318, Shandong province Changyi City North Meng Li Li Port Development Zone Applicant before: Weifang Huaping Carbon Fibre Co., Ltd. |
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