碳纤维-环氧树脂复合材料的制备及力学性能表征

Preparation and Characterization of the Mechanical Properties of Carbon Fiber-Epoxy Composites

用低温等离子体技术对碳纤维针织物进行处理,将E-44环氧树脂基体与碳纤维织物进行复合,在温度为40℃、模压压力1.5 MPa条件下,采用模压成型法,加热1 h,保温2 h后,制备出碳纤维复合材料。测试了复合材料的拉伸性能、弯曲性能及压缩性能,得出经过等离子体处理后,碳纤维复合材料的纵向拉伸强度比改性处理前提高了31.12%,横向拉伸强度提高了40.61%;纵向弯曲强度提高了26.42%,横向弯曲强度提高了23.41%;纵向抗压强度提高了40.41%,横向抗压强度提高了29.74%。等离子体处理有利于碳纤维与树脂的结合,使得制备出的碳纤维复合材料的力学性能得到提高。

The knitted carbon fabrics was modified by low-temperature plasma technology.The modifiedfabrics and E-44 epoxy matrix were composited under the temperature of 40 ℃ and the molding pressure of1.5 MPa by compression molding method.After heated 1 hour and kept heat 2 hours,the carbon fiber com-posite materials were prepared.The tensile properties,bending properties and compressive performance ofcomposites were tested.The results showed that the tensile strength of modified carbon fiber composites inlongitudinal and transverce directions were improved 31.12% and 40.61% respectively compared with thatof untreated carbon fiber composites;the bending strength in longitudinal and lateral directions were im-proved 26.42% and 23.41% respectively;the compressive strength in longitudinal and transverce directionswere improved 40.41% and 29.74% respectively.Plasma treatment was in favor of combining carbon fiberand resin and could improve the mechanical properties of carbon fiber composites.