等离子体改性芳纶及其针织物复合材料制备

Modification of Aramid Fiber by Low Temperature Plasma and Preparation of Its Composite Material

为了提高芳纶纤维在复合材料中与树脂基体的界面黏结性,本文采用等离子体技术对芳纶纤维进行改性。通过单因素试验和正交试验优化了等离子体改性工艺,将改性后的芳纶纤维织造成针织物后用于制备复合材料,并对复合材料的拉伸性能进行了测试。结果表明,等离子体处理最优工艺为处理功率为150 W、压强为60 Pa、时间为120 s,以改性后的芳纶纤维编织的针织物为增强体制备的复合材料,抗拉强度纵向提高49%,横向提高33%。

In order to improve the interface adhesion between aramid fiber and resin matrix, this paper modi- fied aramid fiber by using plasma technology. The plasma modification process through the single factor experiment and orthogonal experiment was optimized. After the modification, aramid fibers was knitted into fabrics and then used for preparation of composite materials, the tensile strength of the composite materials was tested. The results show that the optimal processing is that the power is 150 W, the pressure is 60 Pa, and treatment time is 120 s. Using the modified aramid fiber knitted fabric as reinforcement, the longitudinal of the tensile strength of the com- posite material increases by 49%, transverse increased 33% when compared with untreated aramid fiber knitted fab-rics.