点击次数：
论文类型：期刊论文
发表时间：2015-11-01
发表刊物：VACUUM
收录刊物：EI、SCIE、ISTIC、Scopus
卷号：121
页面范围：152-158
ISSN号：0042-207X
关键字：DBD plasma; Air and oxygen; ILSS; Chemical and physical changes; Humid resistance
摘要：Poly(p-phenylene-2,6-benzobisoxazole) (or PBO) fibers were treated with dielectric barrier discharge plasma (DBD) using air and oxygen gas, respectively. The treatment time was set as 12s, plasma power density of air-DBD plasma was used as 10 W/cm(3), 20 W/cm(3), 30 W/cm(3), 40 W/cm(3) and 50 W/cm(3). The interlaminar shear strength (ILSS) between PBO fiber and bismaleimide (BMI) resin was improved by air-DBD plasma treatment and reached its highest value 57.1 MPa at 12s, 30 W/cm(3). Meanwhile, the ILSS of PBO/BMI composites treated by oxy-DBD plasma at the same condition was only 51.2 MPa. The chemical and physical changes of PBO fiber caused by plasma were studied by X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM), respectively. The surface polarity and reactivity of PBO fiber were enhanced by plasma treatment, the surface was roughened as well. Otherwise, the single fiber tensile strength of PBO fibers were studied, proper parameters by plasma would not decline the mechanical property evidently. These phenomena were considered as the reason of the improved ILSS. Furthermore, the water absorption of PBO/BMI composites was tested, the composites showed good humid resistance and the plasma treatment declined the water absorption of PBO/BMI composites. (C) 2015 Elsevier Ltd. All rights reserved.