通用级沥青基炭纤维的表面处理及增强ABS复合材料力学性能的研究

STUDY ON SURFACE TREATMEAT OF PITCH BASED CARBON FIBER AND PROPERTIES OF REINFORCED ABS COMPOSITE

通过自制实验装置，以ＮＨ４ＮＯ３ 作为电解液，对短切通用级沥青基炭纤维进行阳极氧化表面处理。结果表明：处理后，纤维表面粗糙度和含氧官能团数目明显增大，有效地改善了ＣＦ／ＡＢＳ复合材料的界面粘结性。当处理条件为电解液浓度５ ％ ，电流强度０．８ Ａ，氧化时间１２０ ｓｅｃ时，ＣＦ／ＡＢＳ复合材料的力学性能达到最好。当ＣＦ含量为１２．８ Ｖ／％ 时，拉伸强度由４５ ＭＰａ 提高到６９ ＭＰａ，拉伸模量由０．７３ ＧＰａ 提高到１．６５ ＧＰａ，弯曲强度由９０．５ Ｍｐａ 提高到１１０．８ ＭＰａ，弯曲模量由２．６０ ＧＰａ提高到４．２１ ＧＰａ。并对处理前后沥青基炭纤维增强ＡＢＳ复合材料的机理进行了分析。

Electrolysis oxidation etching experiment was designed to treat chopped pitch based CF. NH 4NO 3 was chosen as electrolyte. After treatment, CF′s surface became rough and oxygenic groups had increased dramatically. Under the optimum condition of treatment: the concentration of electrolyte is 5 %, current intensity is 0.8 A and oxidation time is 120 s, and the content of CF 12.8 V/%, the tensile strength has increased from 45 MPa to 69 MPa, tensile modulus from 0.73 GPa to 1.65 GPa, flexural strength from 90.50 MPa to 110.8 MPa, and flexural modulus from 2.6 GPa to 4.21 GPa respectively. The mechanism of fracture was also analyzed through SEM and XPS for pitch based carbon fiber reinforced ABS with and without surface treatment.