TPU无纺布对玻纤预制体渗透率和FRP层合板层间韧性的影响
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摘要
将熔喷成型的热塑性聚氨酯(TPU)无纺布(TNF)作为复合材料结构化的增韧层,采用真空树脂传递模塑(VARTM)工艺制备无纺布/玻璃纤维/环氧(TNF/GF/EP)复合材料,研究了其层间断裂韧性以及增韧机制,并对无纺布引入前后的玻璃纤维织物预浸体的渗透率进行了测量。结果表明:TNF增韧后的复合材料层间断裂韧性得到提高,Ⅰ型能量释放率GⅠC由790J/m~2增加到1411 J/m~2,提高了78%,Ⅱ型能量释放率GⅡC由569. 9 J/m~2增加到1223. 8 J/m~2,提高了115%,均表现出明显的增韧效果;同时,TNF的引入使得复合材料预制体体系的渗透率下降了56. 5%。
In this study,the thermoplastic polyurethane nonwoven fabric( TNF) was chosen as structural toughening layer to improve the composite toughening,and the composites were fabricated by vacuum-assisted resin transfer molding( VARTM) technique. The toughening properties of the composites were investigated as well as permeability. Toughening of GF/EP composites was achieved by interleaving TNF. It provided the best all-round performance with fracture toughness improvements of 78% and 115% for mode-Ⅰ and mode-Ⅱ,respectively. At the same time,the permeability of TNF/GF/EP composites was decreased by 56. 5%.
In this study,the thermoplastic polyurethane nonwoven fabric( TNF) was chosen as structural toughening layer to improve the composite toughening,and the composites were fabricated by vacuum-assisted resin transfer molding( VARTM) technique. The toughening properties of the composites were investigated as well as permeability. Toughening of GF/EP composites was achieved by interleaving TNF. It provided the best all-round performance with fracture toughness improvements of 78% and 115% for mode-Ⅰ and mode-Ⅱ,respectively. At the same time,the permeability of TNF/GF/EP composites was decreased by 56. 5%.
引文
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[20]Guo M,Yi X,Liu G,et al. Simultaneously increasing the electrical conductivity and fracture toughness of carbon-fiber composites by using silver nanowires-loaded interleaves[J]. Composites Science and Technology,2014,97:27-33.
[2]Almuhammadi K,Alfano M,Yang Y,et al. Analysis of interlaminar fracture toughness and damage mechanisms in composite laminates reinforced with sprayed multi-walled carbon nanotubes[J]. Materials&Design,2014,53(1):921-927.
[3]Khan S U,Kim J K. Improved interlaminar shear properties of multiscale carbon fiber composites with bucky paper interleaves made from carbon nanofibers[J]. Carbon,2012,50(14):5265-5277.
[4]周磊,黎大胜,侯锐钢.铺层结构对树脂基复合材料层间剪切强度影响的研究[J].玻璃钢/复合材料,2016(9):44-48.
[5]Jiang J,Yao X,Xu C,et al. Preparation of graphene oxide coatings onto carbon fibers by electrophoretic deposition for enhancing interfacial strength in carbon fiber composites[J]. Journal of the Electrochemical Society,2016,163(5):D133-D139.
[6] Kostopoulos V,Kotrotsos A,Tsantzalis S,et al. Toughening and healing of continuous fibre reinforced composites by supramolecular polymers[J]. Composites Science&Technology,2016,128:84-93.
[7]张晓霞,戚海东,王芳,等.风电叶片复合材料层间剪切破坏声发射监测[J].工程塑料应用,2012,40(8):77-80.
[8]Borooj M B,Shoushtari A M,Haji A,et al. Optimization of plasma treatment variables for the improvement of carbon fibres/epoxy composite performance by response surface methodology[J]. Composites Science&Technology,2016,128:215-221.
[9]Zhou G,Movva S,Lee L J. Preparation and properties of nanoparticle and long-fiber-reinforced unsaturated polyester composites[J].Polymer Composites,2009,30(7):861-865.
[10]Mekic S,Akhatov I S,Ulven C A. Analysis of a radial infusion model for in-plane permeability measurements of fiber reinforcement in composite materials[J]. Polymer Composites,2010,30(12):1788-1799.
[11]Nguyen V H,Lagardere M,Park C H,et al. Permeability of natural fiber reinforcement for liquid composite molding processes[J].Journal of Materials Science,2014,49(18):6449-6458.
[12]Pan R,Liang Z,Zhang C,et al. Statistical characterization of fiber permeability for composite manufacturing[J]. Polymer Composites,2000,21(6):996-1006.
[13]魏浩,朱凌,王继辉.添加表面毡对复合材料层间增韧的影响[J].玻璃钢/复合材料,2015(10):48-52.
[14] Matsuda S,Hojo M,Murakami A,et al. ModeⅡinterlaminar fracture toughness of ionomer interleaved carbon fiber/epoxy laminates[J]. Journal of the Adhesion Society of Japan,2000,36(2):45-52.
[15]Beckermann G W,Pickering K L. Mode-I and Mode-Ⅱinterlaminar fracture toughness of composite laminates interleaved with electrospun nanofibre veils[J]. Composites Part A:Applied Science and Manufacturing,2015,72:11-21.
[16]沈跃风,胡美群.纤维复合材料的无纺布层间增韧性研究[J].化工设计通讯,2017,43(8):68-69.
[17]Pegoretti A,Cristelli I,Migliaresi C. Experimental optimization of the impact energy absorption of epoxy-carbon laminates through controlled delamination[J]. Composites Science and Technology,2008,68(13):2653-2662.
[18]张朋,刘刚,胡晓兰,等.结构化增韧层增韧RTM复合材料性能[J].复合材料学报,2012,29(4):1-9.
[19]Kuwata M,Hogg P J. Interlaminar toughness of interleaved CFRP using non-woven veils:Part 2. Mode-Ⅱtesting[J]. Composites Part A:Applied Science and Manufacturing,2011,42(10):1551-1559.
[20]Guo M,Yi X,Liu G,et al. Simultaneously increasing the electrical conductivity and fracture toughness of carbon-fiber composites by using silver nanowires-loaded interleaves[J]. Composites Science and Technology,2014,97:27-33.