Department of Electronics and Computer Engineering, Hanyang University, Seoul 04763, Korea.
J Nanosci Nanotechnol. 2019 Oct 1;19(10):6675-6681. doi: 10.1166/jnn.2019.17100.
We propose a hydrophobic graphene-sponge composite produced by embedding graphene flakes within polyurethane sponge as a selective absorbent for hydrophobic liquids from a contaminated water mixture. The self-aggregation nature of graphene flakes effectively allows higher graphene content to be added inside the polyurethane sponge with repeated dip-coating. High hydrophobicity due to the intrinsic nature graphene surface allows the selective absorption of liquid contaminants from a water mixture. Given the porous structure of the composite, absorption capability of 134-233 times its own weight towards various hydrophobic liquids is possible.
我们提出了一种疏水石墨烯海绵复合材料，通过将石墨烯薄片嵌入聚氨酯海绵中制得，可作为从污染水混合物中选择性吸收疏液的吸收剂。石墨烯薄片的自聚集性质有效地允许在重复浸涂过程中向聚氨酯海绵中添加更高含量的石墨烯。由于石墨烯表面的固有性质，该复合材料具有高疏水性，可从水混合物中选择性地吸收液体污染物。鉴于该复合材料的多孔结构，它对各种疏液的吸收能力可达其自身重量的 134-233 倍。
