CN103074758B - Ultrasonic atomization humidification method for production of carbon fiber - Google Patents
Ultrasonic atomization humidification method for production of carbon fiber Download PDFInfo
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- CN103074758B CN103074758B CN201110327262.5A CN201110327262A CN103074758B CN 103074758 B CN103074758 B CN 103074758B CN 201110327262 A CN201110327262 A CN 201110327262A CN 103074758 B CN103074758 B CN 103074758B
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Abstract
The invention discloses an ultrasonic atomization humidification method for production of a carbon fiber. The method comprises the following steps: (1) ultrasonic atomization: a step of carrying out ultrasonic oscillation and atomization on humidification liquid to obtain a fog granule and controlling relative humidity in an atomization humidification apparatus to be 30 to 99% by adjusting the frequency of ultrasonic oscillation and the addition amount of the humidification liquid; and (2) humidification: a step of humidifying the carbon fiber in the atomization humidification apparatus until moisture content of the carbon fiber is 0.5 to 10%. According to the method, after humidification of the carbon fiber, the moisture content in the carbon fiber is low, energy consumption for drying of the carbon fiber in subsequent production is low, so more production cost is saved compared with the prior art; after humidification, the fog granule adheres onto the surface of the carbon fiber, so the interior structure of the carbon fiber is not destroyed, mechanical damage to the carbon fiber during production is reduced, and thus, strength of the carbon fiber is maximumly protected from decrease in subsequent production procedures and performances like tensile strength of a carbon fiber product are eventually improved.
Description
Technical field
The invention belongs to carbon fiber production technical field, particularly a kind of ultrasonic atomization humidification method of producing for carbon fiber.
Background technology
Middle and later periods in 20th century, the excellent properties of carbon fiber using it as fibre reinforced composites, starts to be applied in the field such as aerospace, sports goods.Along with the raising of carbon fiber product performance and the development of fibre reinforced composites technology, carbon fiber is applied to the fields such as space flight and aviation, defence and military, style equipment, medical devices, new forms of energy and civil construction more and more widely, and the demand of high-performance carbon fibre also strengthens fast.Carbon fibre manufacturing processes comprises the steps such as pre-oxidation, charing, surface treatment, and each step all has vital impact to the quality of carbon fiber.The carbon fiber of high-performance, high-quality requires the good homogeneity of property retention and the stability of product.For producing high performance carbon fiber, in production process, material property and homogeneity thereof, each step working condition is stable, is all directly determining the final performance height of carbon fiber product.
In order to ensure the performance of pre-oxygen silk in production process, Chinese patent CN 101760807A uses the method for dipping pure water, oxirane modified silicon oil or ammonia modified silicon oil, reduces the generation of pre-oxidation lousiness in carbon fiber manufacture.
In order to reduce the mechanical damage of impregnating equipment to fiber surface, Chinese patent CN 101967735A provides a kind of dipping machine that fiber is had no mechanical damage, and can realize the treatment process such as chemical modification, washing in carbon fiber serialization production process.
But, in above-mentioned patent documentation, carbon fibre precursor is all adopted to the method that uses liquid direct impregnation, make precursor before pre-oxidation step, contain more steeping liq.On the one hand, this makes the steeping liq in precursor in subsequent production in the time drying, need higher energy consumption, has increased production cost; On the other hand, due to the too much dipping of liquid to precursor, liquid can enter precursor inside, thereby the internal structure of destroying to a certain extent precursor reduces the performance of precursor, finally reduces the performance such as TENSILE STRENGTH of carbon fiber product.
Summary of the invention
In order to overcome the shortcoming existing in existing carbon fiber air-humidification method with not enough, the object of the present invention is to provide a kind of ultrasonic atomization humidification method of producing for carbon fiber, the method has no mechanical damage, has improved carbon fiber TENSILE STRENGTH and save production cost carbon fiber.
Object of the present invention is achieved through the following technical solutions:
A ultrasonic atomization humidification method of producing for carbon fiber, comprises the following steps:
(1) ultrasonic atomization: being droplet by the atomization of humidification liquid sonic oscillation, is 30-99% by regulating the relative humidity in the frequency of sonic oscillation and the addition control atomizing humidifier of humidification liquid;
(2) humidification: by carbon fiber humidification in atomizing humidifier, to carbon fiber water capacity be 0.5-10%.
The described process by humidification liquid ultrasonic atomizatio of step (1) can be to carry out in atomizing humidifier; Also can be to carry out outward at atomizing humidifier, and then droplet is delivered to atomizing humidifier;
The described humidification liquid of step (1) is the one in pure water, running water or the polyether modified silicon oil aqueous solution;
In the described polyether modified silicon oil aqueous solution, the mass concentration of polyether modified silicon oil is 2-15%;
Relative humidity in the described atomizing humidifier of step (1) is preferably 50-95%;
The described carbon fiber of step (2) can be polyacrylonitrile-based carbon fibre;
The described carbon fiber water capacity of step (2) is preferably 0.7-8%.
The present invention has following advantage and effect with respect to prior art:
In air-humidification method of the present invention, after carbon fiber humidification, water capacity is lower, and in subsequent production, carbon fiber energy consumption in the time drying is also low, more saves production cost than existing production technology; And the droplet that after humidification, ultrasonic atomization produces is attached to carbon fiber surface; do not destroy the internal structure of carbon fiber and can form layer protecting film at carbon fiber surface; reduce carbon fiber mechanical damage in process of production; thereby protect to greatest extent the intensity of carbon fiber can not reduce in subsequent production process, finally improved the performances such as the TENSILE STRENGTH of carbon fiber product.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment 1
A ultrasonic atomization humidification method of producing for polyacrylonitrile-based carbon fibre, its step is as follows:
(1) ultrasonic atomization: be droplet by the atomization of pure water sonic oscillation, making the relative humidity in atomizing humidifier is 30%;
(2) humidification: by polyacrylonitrile base carbon fiber precursors humidification in atomizing humidifier, adding to precursor water capacity is 0.5%.
Embodiment 2
A ultrasonic atomization humidification method of producing for polyacrylonitrile-based carbon fibre, its step is as follows:
(1) ultrasonic atomization: the polyether modified silicon oil aqueous solution sonic oscillation atomization that is 2% by mass concentration is droplet, and making the relative humidity in atomizing humidifier is 50%;
(2) humidification: by polyacrylonitrile base carbon fiber precursors humidification in atomizing humidifier, adding to precursor water capacity is 0.7%.
Embodiment 3
A ultrasonic atomization humidification method of producing for polyacrylonitrile-based carbon fibre, its step is as follows:
(1) ultrasonic atomization: the polyether modified silicon oil aqueous solution sonic oscillation atomization that is 10% by mass concentration is droplet, and making the relative humidity in atomizing humidifier is 70%;
(2) humidification: by polyacrylonitrile base carbon fiber precursors humidification in atomizing humidifier, adding to precursor water capacity is 4%.
Embodiment 4
A ultrasonic atomization humidification method of producing for polyacrylonitrile-based carbon fibre, its step is as follows:
(1) ultrasonic atomization: the polyether modified silicon oil aqueous solution sonic oscillation atomization that is 15% by mass concentration is droplet, and making the relative humidity in atomizing humidifier is 95%;
(2) humidification: by polyacrylonitrile base carbon fiber precursors humidification in atomizing humidifier, adding to precursor water capacity is 8%.
Embodiment 5
A ultrasonic atomization humidification method of producing for polyacrylonitrile-based carbon fibre, its step is as follows:
(1) ultrasonic atomization: be droplet by the atomization of running water sonic oscillation, making the relative humidity in atomizing humidifier is 99%;
(2) humidification: by polyacrylonitrile base carbon fiber precursors humidification in atomizing humidifier, adding to precursor water capacity is 10%.
Above-described embodiment is preferably embodiment of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (6)
1. a ultrasonic atomization humidification method of producing for carbon fiber, is characterized in that comprising the following steps:
(1) ultrasonic atomization: being droplet by the atomization of humidification liquid sonic oscillation, is 30-99% by regulating the relative humidity in the frequency of sonic oscillation and the addition control atomizing humidifier of humidification liquid;
(2) humidification: by carbon fiber humidification in atomizing humidifier, to carbon fiber water capacity be 0.5-10%;
The described humidification liquid of step (1) is the polyether modified silicon oil aqueous solution.
2. ultrasonic atomization humidification method of producing for carbon fiber according to claim 1, it is characterized in that: the described process by humidification liquid ultrasonic atomizatio of step (1) is to carry out in atomizing humidifier, or be to carry out at atomizing humidifier, and then droplet is delivered to atomizing humidifier outward.
3. ultrasonic atomization humidification method of producing for carbon fiber according to claim 1, is characterized in that: in the described polyether modified silicon oil aqueous solution, the mass concentration of polyether modified silicon oil is 2-15%.
4. ultrasonic atomization humidification method of producing for carbon fiber according to claim 1, is characterized in that: the relative humidity in the described atomizing humidifier of step (1) is 50-95%.
5. ultrasonic atomization humidification method of producing for carbon fiber according to claim 1, is characterized in that: the described carbon fiber of step (2) is polyacrylonitrile-based carbon fibre.
6. ultrasonic atomization humidification method of producing for carbon fiber according to claim 1, is characterized in that: the water capacity of the described carbon fiber of step (2) is 0.7-8%.
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| CN201110327262.5A CN103074758B (en) | 2011-10-25 | 2011-10-25 | Ultrasonic atomization humidification method for production of carbon fiber |
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| CN201110327262.5A CN103074758B (en) | 2011-10-25 | 2011-10-25 | Ultrasonic atomization humidification method for production of carbon fiber |
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| CN103074758A CN103074758A (en) | 2013-05-01 |
| CN103074758B true CN103074758B (en) | 2014-09-10 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104340764B (en) * | 2013-08-09 | 2017-09-01 | 中国石油天然气股份有限公司 | Polyacrylonitrile fibril for carbon fiber moves back the humidification process method and device of silk when being carbonized |
| CN104451962A (en) * | 2014-10-23 | 2015-03-25 | 吉林方大江城碳纤维有限公司 | Method for eliminating static electricity in carbon fiber production |
| CN105063994A (en) * | 2015-08-20 | 2015-11-18 | 北京化工大学 | Surface treatment method for carbon fibers |
| CN108754931A (en) * | 2018-06-01 | 2018-11-06 | 张家港天宇精梳羊毛有限公司 | A kind of wool shaping moisture regain ultrasonic wave conditioning system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0200258A3 (en) * | 1985-04-29 | 1988-02-03 | Jean Michel Anthony | Ultrasonic spraying device |
| JPS6366325A (en) * | 1986-09-02 | 1988-03-25 | Asahi Chem Ind Co Ltd | Production of carbon fiber for high-performance cfrp |
| CN100507141C (en) * | 2006-05-21 | 2009-07-01 | 淄博矿业集团有限责任公司 | Method for modifying and producing waste asphalt bamboo fibre and its apparatus |
| CN101760807A (en) * | 2009-11-24 | 2010-06-30 | 中复神鹰碳纤维有限责任公司 | Method for reducing production of preoxidized broken filament during preparation of polyacrylonitrile-based carbon fiber |
| CN101967735B (en) * | 2010-09-17 | 2012-07-25 | 西安航科等离子体科技有限公司 | Dipping machine for producing continuous carbon fibers |
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