采用Hummers法和超声波分散法制备氧化石墨烯(GO),并通过SEM、FT-IR等微观手段对其结构进行了表征.并将其应用在水泥砂浆中,研究不同掺量氧化石墨烯在复合盐溶液中经长期浸泡和干湿循环作用后对水泥砂浆耐腐蚀性能的影响.研究结果表明,当GO掺量为0.03%时,水泥砂浆试件经腐蚀作用后抗折强度、抗压强度及相应的耐蚀性能均达到最高.通过SEM及能谱分析结果表明,基准试件的内部结构酥松、杂乱无章,有明显的吭噬痕迹,且试件内部含有较多的Na、S、Cl等元素.而当GO掺量为0.03%时,水泥砂浆内部结构均匀密实,无明显被腐蚀的痕迹,且试件内部无Na、S、Cl等元素,对提高水泥基材料的耐腐蚀性能起到积极作用.
GO were prepared by Hummers method and ultrasonic dispersion, and the structure of GO was characterized by SEM and FT-IR.The effect on the corrosion resistance of GO with different dosage soaked in complex salt solution respectively for a long period and the wet and dry cycle function on the cement mortar were investigated.The results indicate that the flexural strength, compressive strength and corrosion resistance of cement-based materials reached the maximum after corrosion when the dosage of GO was 0.03%.SEM results show that the internal structure of the reference specimens was partial incompact and rambling and there were obvious corrosion signs inside the cement structure.However, when the dosage of GO was 0.03%, the internal structure of specimens was compact and there weren't corrosion signs inside the cement structure.The spectrum analysis show that there were many elements such as Na, S, Cl and so on in the reference specimens, but not in the specimens with the dosage of 0.03% GO.The results indicated that it can play a positive role for improving corrosion resistance when the dosage of GO were 0.03% on cement-based materials.
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