为了提高磷酸钙水泥(CPCs)的强度,将纳米片状的氧化石墨烯(GO)与CPCs复合.首先,以α-Ca3(PO4)2、CaHPO4和CaCO4物质的量之比为1∶1∶1的CPCs为固相、不同浓度的GO水分散液为固化液,二者按一定的固/液比混合并固化成型,制得GO/CPCs;然后,探讨GO添加量对GO/CPCs力学强度的影响,测量固化时间、在模拟体液中浸泡后的降解率及浸提液的pH,以XRD检测其物相,并通过SEM观察其显微形貌.结果显示:GO添加量对CPCs的抗压强度有显著影响,最佳添加量为0.050 0wt％;随老化时间的延长,不同GO添加量的CPCs的抗压强度均明显提高,尤其是在早期阶段;与不加GO的对照组相比,老化2h和24 h后,0.050 0wt％ GO/CPCs的抗压强度分别提高了200％和67％.GO/CPCs在模拟体液中的降解率升高且浸提液pH下降.GO/CPCs在同期水化反应中可获得更多的羟基磷灰石相,结晶有序、均匀且细小.所得结论表明掺加GO可以显著改善CPCs的抗压强度.
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