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本文较为系统、全面地研究了各种气氛冷等离子体对石墨纤维(GrF)的表面处理。GrF经活性冷等离子体处理后,GrF和树脂基体间的粘结能力大为改善。不仅石墨纤维复合材料(GrFRP)的层间剪切强度(ILSS)提高 250％以上,而且GrFRP的抗拉强度(S)和杨氏模量(M)也分别提高40％和10％。在GrFRP的ILSS与GrF被处理时间(t)之间存在着指数关系 ILSS=A+Ce~(B/t)。 我们认为:GrFRP的层间剪切破坏主要发生在GrF的外表面层中。活性冷等离子体处理通过改变GrF的表面层结构提高了GrF表面层的抗剪能力,使得GrFRP的ILSS得到大幅度提高。
In this paper, we systematically and comprehensively studied the surface treatment of graphite fiber (GrF) with cold plasma of various atmospheres. GrF activity cold plasma treatment, GrF and resin matrix greatly improved the ability to bond. Not only did the interlaminar shear strength (ILSS) of graphite fiber composites (GrFRP) increase by more than 250%, but the tensile strength (S) and Young’s modulus (M) of GrFRP by 40% and 10%, respectively. There is an exponential relationship ILSS = A + Ce ~ (B / t) between GrSSRP and GrFRP processed time (t). In our opinion, the interlayer shear failure of GrFRP mainly occurs in the outer surface layer of GrF. The reactive cold plasma treatment improves the shear resistance of the GrF surface layer by changing the surface layer structure of GrF, so that the ILSS of GrFRP is greatly improved.