从复合材料离位增韧思想出发,选用具有高孔隙率的尼龙无纺布（PNF）作为结构化增韧层,采用RTM工艺制备了PNF层间增韧改性的U3160碳纤维增强环氧3266树脂基复合材料（U3160-PNF/3266）,并研究了其韧性相关性能和增韧机制。结果表明：U3160-PNF/3266复合材料层间仍保持其原有的结构形式,同时与层间树脂相互贯穿形成了一种非反应诱导相分离的双连续结构,并且这种双连续结构表现出显著的增韧效果。U3160-PNF/3266复合材料的Ⅰ型层间断裂韧性和Ⅱ型层间断裂韧性分别提高了1.1倍和1.4倍,冲击后压缩强度由212MPa提高到281MPa。
Based on ex-situ toughening concept,the polyamide nonwoven fabric（PNF） with high porosity was chosen as structural toughening layer,and the U3160 carbon fiber reinforced epoxy 3266 composites toughened by interlaminar PNF（U3160-PNF/3266） was fabricated via RTM process.The properties of U3160-PNF/3266 composite were investigated as well as toughening mechanism.The results indicate that the PNF still keep original structure in composites interlaminar,and formed a unreactional co-continuous structure with based resin which show remarkable toughening effect.Mode Ⅰ fracture toughness（GⅠ C） and mode Ⅱ fracture toughness（GⅡ C） of the U3160-PNF/3266 composites are 1.1 times and 1.4 times higher respectively than that of the control system,and the compression after impact（CAI） increase from 212 MPa to 281 MPa.
参考文献
| [1] | Huang Y, Hunston D L, Anthony J, et al. Mechanisms of toughening thermoset resins [J]. Advances in Chemistry, 1993, 233(1): 405-425. |
| [2] | Thouless M D, Du J, Yee A F. Mechanics of toughening brittle polymers [J]. ACS Symposium Series, 2000, 759(5): 71-85. |
| [3] | Pearson Raymond A. Toughening epoxies using rigid thermoplastic particles [J]. Advances in Chemistry, 1993, 233(17) : 405-425. |
| [4] | HedrlekJeffrey C, Patel Niranjan M, MeGrath James E. Toughening of epoxy resin networks with functionalized engineering thermoplastics [J]. Advances in Chemistry, 1993, 233(11) : 293-304. |
| [5] | 益小苏,安学峰,唐邦铭,张子龙.一种提高层状复合材料韧性的方法:中国,01100981.0[P].2001-03-26 |
| [6] | An Xuefeng, Tang Bangming, Yi Xiaosu, et al. Toughness improvement of carbon laminates by periodic interleaving thin films [J]. Journal of Materials Science Letters, 2002, 21 (22) : 1763-1765. |
| [7] | Yi Xiaosu, An Xuefeng, Tang Bangming, et al. Ex- situ formation of periodic interlayer structure to imptove significantly the impact damage resistance of carbon laminates [J]. Advance Engineering Materials, 2003, 5(10): 729-732. |
| [8] | Long Wei, Xu Yahong, Yi Xiaosu, An Xuefeng. Preliminary study on resin transfer molding of highly- toughened graphite laminates hy ex-situ method [J]. Journal of Materials Science, 2004, 39(6) : 2263-2266. |
| [9] | Cheng Qunfeng, Fartg Zhengping, Yi Xiaosu, An Xuefeng, Tang Bangming, Xu Yahong. Ex-situ concept for toughening the RTMable BMI matrix composites I: Improving the interlaminar fracture toughness [J ]. Journal of Applied Polymer Science, 2008, 109(3): 1625-1634 |
| [10] | Cheng Qunfeng, Fang Zhengping, Yi Xiaosu, An Xuefeng, Tang Bangming, Xu Yahong. Ex-situ concept for toughening the RTMable BMI matrix composites Ⅱ Improving the compression after impact [J]. Journal of Applied Polymer Science, 2008, 108(4): 2211-2217. |
| [11] | Cheng Qunfeng, Fang Zhengping, Xu Yahong, Yi Xiaosu. Morphological and spatial effects on toughness and impact damage resistance of PAEK-toughened BMI and graphite fiber composite laminates [J]. Chinese Journal of Aeronautics, 2009, 22(1): 87-96. |
| [12] | Cheng Qunfeng, Fang Zhengping, Xu Yahong, Yi Xiaosu. Improvement of the impact damage resistance of BMI/graphite iaminates by the ex- situ method [J]. High Performance Polymers, 2006, 18(6): 907-917. |
| [13] | 张明,安学峰,唐邦铭,益小苏.高性能双组份环氧树脂固化动力学研究和TTT图绘制[J].复合材料学报,2006,23(1):17-25. |
| [14] | 张明,安学峰,唐邦铭,益小苏.增韧环氧树脂相结构[J].复合材料学报,2007,24(1):13-17. |
| [15] | 黄智彬,李刚,李鹏,等.聚砜纳米纤维增韧CFRP的制备及性能[J].复合材料学报,2008,25(5):25-32. |
| [16] | Srinivasan K, Jackson W C, Smith B T, Hinkley J A. Charaterization of damage modes in impacted thermoset and thermoplastic composites [J]. Journal of Reiforced Plasctics and Composites, 1992, 11(10): 1111-1126. |
| [17] | 益小苏,许亚洪,程群峰,等.层间韧化的碳纤维复合材料层压板的力学性能[J].材料研究学报,2008,22(4):337-346. |
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