王先锋,曹正华,彭公秋,张宝艳.不同纺丝工艺国产高强中模碳纤维及其复合材料性能对比[J].表面技术,2023,52(4):446-457.
WANG Xian-feng,CAO Zheng-hua,PENG Gong-qiu,ZHANG Bao-yan.Characterization of Different Types Domestic T800 Carbon Fibers and Their Composites[J].Surface Technology,2023,52(4):446-457 |
| 不同纺丝工艺国产高强中模碳纤维及其复合材料性能对比 |
| Characterization of Different Types Domestic T800 Carbon Fibers and Their Composites |
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| DOI：10.16490/j.cnki.issn.1001-3660.2023.04.041 |
| 中文关键词: 碳纤维 纺丝工艺 表面特性 复合材料 界面性能 力学性能 |
| 英文关键词:carbon fiber spinning process surface properties composites interfacial properties mechanical properties |
| 基金项目: |
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| Author | Institution |
| WANG Xian-feng | AVIC Manufacturing Technology Institute, Beijing 101300, China |
| CAO Zheng-hua | AVIC Manufacturing Technology Institute, Beijing 101300, China;AVIC Composite Corporation Ltd., Beijing 101300, China |
| PENG Gong-qiu | AVIC Manufacturing Technology Institute, Beijing 101300, China |
| ZHANG Bao-yan | AVIC Manufacturing Technology Institute, Beijing 101300, China |
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| 中文摘要: |
| 目的 进一步探究国产不同纺丝工艺高强中模碳纤维及其复合材料的相关性能，并验证干喷湿纺工艺碳纤维的表面状态及其复合材料性能。方法 针对干喷湿纺的GW800G和湿喷湿纺的CCF800H两种碳纤维及其复合材料，采用场发射环境扫描电子显微镜(FESEM)、原子力显微镜(AFM)、X射线光电子能谱仪(XPS)、X射线衍射仪(XRD)和动态接触角测量仪表征其表面形貌、表面化学特性以及表面能，对两种碳纤维的微观表面性能以及微观结构进行对比分析，并与相同的高温环氧树脂复合，通过热压罐成型技术制成层合板，进一步表征两种复合材料的力学性能，并观察了复合材料90°拉伸和90°弯曲破坏试样断面形貌。结果 GW800G碳纤维表面形貌较光滑，CCF800H碳纤维表面粗糙度较大且凹槽明显。GW800G碳纤维和CCF800H碳纤维表面化学活性较高和表面能均较高，表面活性碳原子比例分别达到了34.11%和 33.24%，表面能分别达到了36.92 mJ/m2和40.08 mJ/m2，二者水平差距较小。同时两种碳纤维的微晶结构相似，GW800G碳纤维具有更高的石墨化程度。这些特点均与其复合材料所表现的性能一致，GW800G/BA9918E复合材料具有更高的0°拉伸强度，而其他界面相关的强度和耐湿热能力均达到CCF800H/BA9918E复合材料的水平。两种复合材料的90°拉伸和90°弯曲破坏试样断面形貌也反映出两种碳纤维均与树脂基体有良好的结合能力。结论 国产表面改良型干喷湿纺碳纤维及其复合材料在保证高强度的同时，碳纤维表面性能和复合材料的界面性能达到了湿喷湿纺碳纤维的水平。 |
| 英文摘要: |
| High strength intermediate modulus carbon fibers composites is one of the most important aviation materials in the world at present. The structure and composition of carbon fiber surface determine the interfacial strength between carbon fiber and resin, which affects the properties of carbon fiber composites. Carbon fibers with different spinning processes have different surface physical and chemical properties, and the properties of their composites are also different. In this study, two kinds of carbon fibers, GW800G by dry-jet wet spinning and CCF800H by wet-jet spinning, were selected. The surface morphology of carbon fibers was characterized by scanning electron microscope (Qusttro S111230) and atomic force microscope (Dimension ICON). X-ray photoelectron spectroscopy (ESCALAB 250) was used to characterize the surface chemical composition of carbon fibers，and the microstructure of carbon fibers were analyzed by X-ray diffractometer (XRD-6000). Then eight 4 mm long monofilament samples were made from the two kinds of carbon fibers, and their contact angles in water and ethylene glycol were measured by dynamic contact angle detector (DAT-25), and the surface energy was calculated. After that, the two carbon fibers were compounded with the same high temperature epoxy resin (BA9918E). The prepregs was cured at 180 ℃, 0.6 MPa for 3 hours through autoclave molding technology. After cutting the carbon fiber composites according to various ASTM testing standards, 0° tensile test, 90° tensile test, 90° flexural test, open hole tensile test, interlaminar shear test and compression after impact test (impact energy:6.67 J/mm) were carried out under the dry condition at room temperature. Then the test samples were soaked in water at (71±5) ℃ for (336±5) hours, and then 90° tensile test, 90° flexural test and interlaminar shear test were carried out at 130 ℃ to further characterize the hygrothermal performance of carbon fiber composites. Finally, scanning electron microscope was used to observe the fracture morphology of the damaged samples in 90° tensile test and 90° flexural test at room temperature. The results indicate that the surface morphology of GW800G carbon fiber is smooth, while the surface roughness of CCF800H carbon fiber is large and the groove is obvious. GW800G carbon fiber and CCF800H carbon fiber have high surface chemical activity and surface energy. The proportion of surface active carbon atoms reaches 34.11% and 33.24% respectively, and the surface energy reaches 36.92 mJ/m2 and 40.08 mJ/m2. There is a small gap between the two levels. At the same time, the graphitic microcrystalline structure of the two carbon fibers is similar, and GW800G carbon fiber has a higher degree of graphitization. These characteristics are consistent with the properties of its composites. The modulus of the two carbon fibers is similar. GW800G/BA9918E composites have higher 0° tensile strength, while other interface related strength and hygrothermal performance reach the level of CCF800H/BA9918E composites. The fracture morphology of 90° tensile and 90° flexural failure specimens of the two composites also reflect that the two carbon fibers have good bonding ability with the resin matrix. It is verified that the surface properties of domestic dry-jet wet spinning carbon fiber and the interface properties of composites have reached the level of wet-jet carbon fiber, while ensuring high strength, and have good comprehensive mechanical properties. |
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