亚麻纤维/玄武岩(玻璃)纤维混杂复合材料的力学性能、断面形貌和DMA的性能表征

Mechanical properties,morphology and DMA of flax/basalt(glass) fiber fabric hybrid composite baterials

研究了亚麻纤维分别与玄武岩纤维和玻璃纤维(F/B和F/G)混杂质量比对混杂复合材料(B1-B3和G1-G3)的密度、力学性能和DMA性能。结果表明,随BF(玄武岩纤维)和GF(玻璃纤维)含量增加,F/G复合材料的理论密度和实际密度都增加,而F/B的理论密度降低,实际密度增大;B3的弯曲强度、弯曲模量和冲击韧性分别比B1高40.7%,64.5%和39.4%,G3的弯曲强度、弯曲模量和冲击韧性分别比G1高26.3%,48.0%和58.9%,复合材料F/G弯曲强度的比强度和储存模量的比模量与F/B相当,但F/G的冲击韧性和动态热机械性能都明显比F/B更好,同时F/G混杂体系的界面结合强度更高。SEM(扫描电子显微镜)表明亚麻纤维与UP结合较差,BF与UP的界面结合不如GF与UP,因此F/G力学性能比F/B更好。

The composites(B1-B3 and G1-G3)were prepared by changing the weight ration between flax and basalt fibers or glass fibers(F/B and F/G),the effect of theoretical density,actual density,mechanical and DMA performance were studied as well.The results show that actual density and theoretical density values of F/G increase gradually with the increase of GF contents and actual density of F/B increase with the increase of BF contents,except theoretical values.Flexural strength,flexural modulus and impact strength of F/B and F/G that are enhanced with increasing the amount of BF and GF are 67.2%(26.3%),67.8%(48.0%)and 39%(58.9%)higher than that of B1(G1),respectively.It was found that specific strength and modulus of F/G and F/B was approximate,but impact strength,dynamic thermophysical properties and interfacial adhesion of F/G was obviously better than that of F/B.SEM graphs indicate a poor interfacial adhesion between flax fiber and UP matrix and superior interfacial adhesion in GF and UP matrix.So mechanical properties of F/G was better than that of F/B.