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论文类型：期刊论文
发表时间：2011-05-15
发表刊物：APPLIED SURFACE SCIENCE
收录刊物：SCIE、EI
卷号：257
期号：15
页面范围：6935-6940
ISSN号：0169-4332
关键字：PBO fiber; Oxygen plasma; Surface activation; Interfacial adhesion
摘要：The improved interfacial adhesion of PBO fiber-reinforced bismaleimide composite by oxygen plasma processing was investigated in this paper. After treatment, the maximum value of interlaminar shear strength was 57.5 MPa, with an increase of 28.9%. The oxygen concentration of the fiber surface increased, as did the surface roughness, resulting in improvement of the surface wettability. The cleavage and rearrangement of surface bonds created new functional groups O=C-O, N-C=O and N-O, thereby activating the fiber surface. And long-time treatment increased the reaction degree of surface groups while destroyed the newly-created physical structures. The enhancement of adhesion relied primarily on the strengthening of chemical bonding and mechanical interlocking between the fiber and the matrix. The composite rupture planes indicated that the fracture failure shifted from the interface to the matrix or the fiber. (C) 2011 Elsevier B. V. All rights reserved.