CN106863838A - A kind of continuous fiber braid strengthens the preparation method of thermoplastic composite - Google Patents
A kind of continuous fiber braid strengthens the preparation method of thermoplastic composite Download PDFInfo
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- CN106863838A CN106863838A CN201710144664.9A CN201710144664A CN106863838A CN 106863838 A CN106863838 A CN 106863838A CN 201710144664 A CN201710144664 A CN 201710144664A CN 106863838 A CN106863838 A CN 106863838A
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- braid
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- prepreg tape
- thermoplastic composite
- continuous fiber
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- 239000000835 fiber Substances 0.000 title claims abstract description 35
- 239000002131 composite material Substances 0.000 title claims abstract description 25
- 229920001169 thermoplastic Polymers 0.000 title claims abstract description 11
- 239000004416 thermosoftening plastic Substances 0.000 title claims abstract description 10
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000011199 continuous fiber reinforced thermoplastic Substances 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 5
- 239000011159 matrix material Substances 0.000 claims description 4
- 229920005594 polymer fiber Polymers 0.000 claims description 3
- 238000000748 compression moulding Methods 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 1
- 238000007598 dipping method Methods 0.000 claims 1
- 238000005215 recombination Methods 0.000 claims 1
- 230000006798 recombination Effects 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 238000005470 impregnation Methods 0.000 abstract description 7
- 239000000843 powder Substances 0.000 abstract description 7
- 238000000465 moulding Methods 0.000 abstract description 5
- 238000009941 weaving Methods 0.000 abstract description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 6
- 239000004917 carbon fiber Substances 0.000 description 6
- 238000003475 lamination Methods 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 5
- 239000004696 Poly ether ether ketone Substances 0.000 description 4
- 229920002530 polyetherether ketone Polymers 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- -1 Ether ether ketone Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 238000004804 winding Methods 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
- B29C70/543—Fixing the position or configuration of fibrous reinforcements before or during moulding
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
本发明涉及一种连续纤维编织物增强热塑性聚合物复合材料的制备方法，包括以下步骤：采用粉末浸渍法制备连续纤维增强热塑性复合材料预浸带，然后编织得到预浸带编织物，并利用细束纤维对预浸带编织物固定，限制编织物中的纤维在叠层层压成板材及后续的制品模压成型过程中产生滑移及变形，最后层压成型得到纤维编织物增强热塑性复合材料。The invention relates to a preparation method of a continuous fiber braid reinforced thermoplastic polymer composite material, comprising the following steps: preparing a continuous fiber reinforced thermoplastic composite material prepreg tape by using a powder impregnation method, then weaving to obtain a prepreg tape braid, and using fine The bundle of fibers is fixed to the braid of the prepreg tape to limit the slippage and deformation of the fibers in the braid during the laminated sheet and the subsequent product molding process, and finally laminated to obtain a fiber braid reinforced thermoplastic composite material.
Description
技术领域technical field
本发明涉及一种连续纤维编织物增强热塑性复合材料的制备方法。利用细束纤维固定连续纤维增强热塑性复合材料预浸带编织物，限制编织物中的纤维在叠层层压及后续模压成型过程中在压力作用下滑移及变形。The invention relates to a preparation method of a continuous fiber braid reinforced thermoplastic composite material. The continuous fiber-reinforced thermoplastic composite prepreg tape braid is fixed by using thin bundles of fibers to limit the slippage and deformation of the fibers in the braid under pressure during laminate lamination and subsequent compression molding.
背景技术Background technique
纤维增强热塑性复合材料如今已经广泛应用于航空航天、船舶、汽车零部件等领域，其具有强度高、耐腐蚀、结构可设计性强、可多次成型等优点，并可以通过纤维与树脂的不同组合制备出满足不同性能要求的复合材料，另外热塑性复合材料的预浸料易于贮存，便于使用，因此自产生起发展速度非常快，在各个领域的应用日益普及，逐渐取代热固性复合材料。Fiber-reinforced thermoplastic composites have been widely used in aerospace, ships, auto parts and other fields. They have the advantages of high strength, corrosion resistance, strong structural design, and multiple molding. Combined to prepare composite materials that meet different performance requirements. In addition, the prepregs of thermoplastic composite materials are easy to store and easy to use. Therefore, the development speed is very fast since its creation, and its application in various fields is becoming more and more popular, gradually replacing thermosetting composite materials.
预浸带编织物层压成型制备纤维增强热塑性复合材料的过程中，由于编织物中预浸带并不牢固，在叠层层压及后续模压成型过程中，纤维在压力作用下易产生滑移及变形，在材料内部产生缺陷，当材料受力时，缺陷部位易产生应力集中首先破坏，进而导致复合材料整体的破坏，影响材料的力学性能。另外，预浸带编织物需要按照特定的铺层方式叠层层压以满足特定的性能要求，而纤维的移动会破坏既定的铺层方式，极大的影响铺层方向上纤维增强的效果，材料难以达到设定的性能要求。In the process of preparing fiber-reinforced thermoplastic composites by lamination of prepreg tape braid, because the prepreg tape in the braid is not strong, the fibers are prone to slip under pressure during lamination and subsequent molding. And deformation, defects are generated inside the material. When the material is stressed, the defect is prone to stress concentration and will be destroyed first, which will lead to the destruction of the composite material as a whole and affect the mechanical properties of the material. In addition, the prepreg tape braid needs to be laminated according to a specific lay-up method to meet specific performance requirements, and the movement of fibers will destroy the established lay-up method and greatly affect the effect of fiber reinforcement in the lay-up direction. It is difficult for the material to meet the set performance requirements.
本方法采用干法粉体浸渍制备连续纤维增强热塑性复合材料预浸带，并利用细束纤维对预浸带编织物穿插固定，可以有效固定预浸带，限制纤维的移动，充分发挥纤维增强效果，提高复合材料的力学性能。This method uses dry powder impregnation to prepare continuous fiber reinforced thermoplastic composite material prepreg tape, and uses thin bundles of fibers to interpenetrate and fix the prepreg tape braid, which can effectively fix the prepreg tape, limit the movement of fibers, and give full play to the fiber reinforcement effect , improve the mechanical properties of composite materials.
发明内容Contents of the invention
本发明旨在提供一种连续纤维编织物增强热塑性复合材料的制备方法。The invention aims to provide a preparation method of a continuous fiber braid reinforced thermoplastic composite material.
本发明的制备方法包括如下步骤：Preparation method of the present invention comprises the steps:
（1）采用粉末浸渍法制备连续纤维增强热塑性复合材料预浸料。(1) Prepregs for continuous fiber reinforced thermoplastic composites were prepared by powder impregnation method.
（2）对步骤（1）制备的复合材料预浸带进行编织得到单向及双向编织物。(2) Weaving the composite material prepreg tape prepared in step (1) to obtain unidirectional and bidirectional braided fabrics.
（3）利用细束纤维对编织物穿插后固定，使编织物中预浸带相对固定。(3) Use thin bundles of fibers to interpenetrate the braid and then fix it, so that the prepreg tape in the braid is relatively fixed.
（4）将固定后的预浸带编织物叠层层压成型制备得到纤维增强热塑性复合材料。(4) The fixed prepreg tape braids are stacked and laminated to prepare a fiber-reinforced thermoplastic composite material.
所述步骤（3）中的细束纤维含有难熔或熔点高于树脂基体的纤维。The thin bundle of fibers in the step (3) contains fibers that are refractory or have a melting point higher than that of the resin matrix.
所述步骤（3）中的细束纤维可以含有基体聚合物纤维，在复合过程中，均匀分散于纤维束中的聚合物纤维熔化，将纤维束粘结在一起，形成良好浸渍。The thin bundles of fibers in the step (3) may contain matrix polymer fibers. During the compounding process, the polymer fibers uniformly dispersed in the fiber bundles are melted to bond the fiber bundles together to form a good impregnation.
与现存技术相比，本发明具有以下特点和优点：Compared with the existing technology, the present invention has the following characteristics and advantages:
（1）利用细束纤维对预浸带编织物穿插固定，限制了叠层层压及后续成型过程中纤维的移动，极大的提高了复合材料的力学性能。(1) The use of thin bundles of fibers to interpenetrate and fix the prepreg tape braid restricts the movement of fibers during lamination and subsequent molding, and greatly improves the mechanical properties of the composite material.
（2）本发明采用粉体浸渍与层压成型的方法，制备过程中无溶剂或其他添加剂，工艺简单，成本低且无环境污染。(2) The present invention adopts the method of powder impregnation and lamination molding, and there is no solvent or other additives in the preparation process, the process is simple, the cost is low, and there is no environmental pollution.
附图说明Description of drawings
图1 为本发明双向编织物穿插固定示意图，图2 为本发明单向编织物穿插固定示意图。Fig. 1 is a schematic diagram of the insertion and fixation of the two-way braid of the present invention, and Fig. 2 is a schematic diagram of the insertion and fixation of the unidirectional braid of the present invention.
符号说明Symbol Description
图1及图2中，1为预浸带，2为纤维穿插物In Figure 1 and Figure 2, 1 is the prepreg tape, 2 is the fiber interpenetration
具体实施方式detailed description
下面结合附图和具体实施方式对本发明进行进一步说明，但保护范围并不受此限制。The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the scope of protection is not limited thereto.
实施例1Example 1
（1）采用粉末浸渍法制备连续碳纤维增强聚醚醚酮复合材料预浸料。碳纤维经过分散辊分散后进入粉末浸渍槽中并吸附PEEK粉末，然后通过热烘道加热，加热温度设定为370℃，冷却后收卷即可得到预浸带。(1) The continuous carbon fiber reinforced polyether ether ketone composite material prepreg was prepared by powder impregnation method. After the carbon fiber is dispersed by the dispersing roller, it enters the powder impregnation tank and absorbs the PEEK powder, and then is heated through the hot drying tunnel. The heating temperature is set at 370°C, and the prepreg tape can be obtained by winding after cooling.
（2）使用编织机对步骤（1）制备的连续碳纤维增强聚醚醚酮预浸带进行编织得到预浸带单向编织物。(2) The continuous carbon fiber reinforced polyether ether ketone prepreg tape prepared in step (1) is braided by a braiding machine to obtain a unidirectional braided prepreg tape.
（3）利用细束碳纤维对编织物穿插后固定，使编织物中预浸带相对固定。(3) Use thin bundles of carbon fibers to interpenetrate and fix the braid, so that the prepreg tape in the braid is relatively fixed.
（4）将固定后的预浸带编织物层叠铺放在模具中，预热到370-390℃，施加12-15MPa的压力，保温50min，最后自然冷却至室温后脱模，制备得到碳纤维聚醚醚酮复合材料。(4) Lay the fixed prepreg tape braids in the mold, preheat to 370-390°C, apply a pressure of 12-15MPa, keep it warm for 50min, and finally cool down to room temperature naturally and demould to prepare carbon fiber polycarbonate. Ether ether ketone composite.
经性能测试，实施例1方法制备的碳纤维聚醚醚酮复合材料具有较佳的力学性能，其弯曲强度可达1750MPa，层间剪切强度可达100MPa，抗冲击性能良好。According to the performance test, the carbon fiber polyetheretherketone composite material prepared by the method in Example 1 has better mechanical properties, its bending strength can reach 1750MPa, the interlaminar shear strength can reach 100MPa, and the impact resistance is good.
以上所述，仅是本发明的较佳实施例，并非对本发明技术范围作出任何限制，即凡依本发明申请专利范围的内容所作的等效变化与修饰，都应为本发明的技术范畴。The above are only preferred embodiments of the present invention, and do not make any limitation to the technical scope of the present invention, that is, all equivalent changes and modifications made according to the content of the patent scope of the present invention should be within the technical scope of the present invention.
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Cited By (5)
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| CN111730922A (en) * | 2019-03-25 | 2020-10-02 | 东莞市千岛金属锡品有限公司 | Radar echo attenuation composite material and preparation method thereof |
| CN113288385A (en) * | 2021-05-17 | 2021-08-24 | 济南大学 | Method for preparing bionic lumbar pedicle screw by continuous carbon fibers |
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Cited By (5)
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| CN113288385A (en) * | 2021-05-17 | 2021-08-24 | 济南大学 | Method for preparing bionic lumbar pedicle screw by continuous carbon fibers |
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