This paper aims to establish the relationship between defects in carbon nanotubes (CNT) grown on foam-like three-dimensional graphene (3DG) substrate (CNT/3DG) and its surface wetting property for developing a superhydrophobic surface. Both CNT and 3DG are grown by chemical vapor deposition. The defects in the CNT/3DG heterostructure are monitored using Raman and X-ray photoelectron spectroscopies as a function of graphene layers. A near superhydrophobic surface (~150°) is identified by controlling the number of 3DG layers, which with subsequent encapsulation using polymethylmethacrylate/polypyrrole (PMMA/Ppy) polymer matrix presented a superhydrophobic surface with high structural integrity and stability. The usefulness of the superhydrophobic surface hereby developed, both in terms of adsorption performance of the surface and its reusability, has been evaluated for oil absorption performance from the water–oil mixture. Finally, the superhydrophobicity of the G-CNT-PMMA/PPy surface has been shown to result from its increased solid fraction from binary scanning electron microscopic images. These developments, i.e., correlating the defects in the nanotubes with surface wetting and subsequent polymeric modification in defect-controlled nanotubes to allow superhydrophobicity, provide numerous opportunities for designing suitable absorbents for water remediation.

本文旨在建立在泡沫状三维石墨烯 (3DG) 基板 (CNT/3DG) 上生长的碳纳米管 (CNT) 中的缺陷与其表面润湿性之间的关系，以开发超疏水表面。CNT 和 3DG 都是通过化学气相沉积生长的。CNT/3DG 异质结构中的缺陷使用拉曼和 X 射线光电子光谱作为石墨烯层的函数进行监测。通过控制 3DG 层的数量来识别近超疏水表面 (~150°)，随后使用聚甲基丙烯酸甲酯/聚吡咯 (PMMA/Ppy) 聚合物基质进行封装，呈现出具有高结构完整性和稳定性的超疏水表面。超疏水表面的实用性由此发展，无论是在表面的吸附性能还是其可重复使用性方面，已经评估了水油混合物的吸油性能。最后，G-CNT-PMMA/PPy 表面的超疏水性已被证明是由于其从二进制扫描电子显微图像中增加的固体分数造成的。这些发展，即，将纳米管中的缺陷与表面润湿和随后在缺陷控制的纳米管中的聚合物改性相关联以允许超疏水性，为设计用于水修复的合适吸收剂提供了许多机会。