为了使石墨粉体与树脂能够更好地结合, 改善碳素制品的性能, 首先在石墨粉体中原位合成不同酚醛树脂, 再制备成炭/石墨(C/G)复合材料; 分析了原位合成不同树脂的热性能, 观察了炭/石墨复合材料的微观结构, 比较了不同种类、含量的树脂制备炭/石墨复合材料的性能。结果表明: 在0～900 ℃内, 原位合成硼改性酚醛树脂(B-PFR)和邻甲环氧酚醛树脂(OCE-PFR) 的热稳定性能较热塑性酚醛树脂(TP-PFR)和热固性酚醛树脂(TS-PFR)的好; 原位合成的树脂经焙烧后, B-PFR-C/G中石墨颗粒和孔隙分布较均匀, 其次为TP-PFR-C/G和TS-PFR-C/G; B-PFR-C/G的综合性能更好, 树脂质量分数为35%时其密度、硬度、抗压强度可分别达到1.58 g·cm-3, 47.5 HS, 31.8 MPa。

In order to combine the graphite powders and resin better, improve the performance of carbon product, phenol-formaldehyde resin(PFR)was in-situ synthesized in the graphite powders, which was used to prepare carbon/graphite (C/G) composites. The thermal performance of different resins prepared by in-situ synthesis was analyzed. The microstructure of the composites was observed. The performance of the C/G composites prepared with different kinds and contents resins was compared. The results show that the thermal stability performance of boron PFR(B-PFR) and o-cresol epoxy PFR(OCE-PFR) were better than thermoplastic phenolic (TP) PFR (TP-PFR) and thermosetting(TS) PFR (TS-PFR) in 0-900 ℃. The graphite granules and holes in B-PFR-C/G distributed more evenly than those in TP-PFR and TS-PFR after calcination. The comprehensive performance of B-PFR-C/G was better, the density, hardness and compressive strength were 1.58 g·cm-3, 47. 5 HS and 31.8 MPa when the resin content was 35wt%.