近日,云南师范大学李明教授课题组在Chemical Engineering Journal(影响因子10.652)上发表了题为“Surface modification of activated carbon fiber by low-temperature oxygen plasma: Textural property, surface chemistry, and the effect of water vapor adsorption”的研究论文(DOI:10.1016/j.cej.2021.129474),系统研究了低温氧等离子体对活性炭纤维表面的改性过程中其结构性质、表面化学及对水蒸气吸附效果的影响,展示了亲水性碳材料在空气取水方面的应用前景。研究发现:碳材料表面的含氧官能团和带有未配对电子的碳原子对碳材料表面亲水性的提升做出了突出的贡献。这种带有未配对电子的碳原子可能与水分子发生了化学反应,并生成了亲水性含氧官能团,这些新生成的含氧官能团将被作为后续水蒸气吸附过程中的一部分亲水性位点,论文借助系统性实验研究和材料表征分析阐明了低温氧等离子体对碳材料的改性机理及其水蒸气吸附机理。
Fig. 12. Several water vapor adsorption-desorption cycles of ACF-raw and ACFL8-30 at 25 ℃. (a): the whole cycles of ACF-raw, (b): the whole cycles of ACFL-8-30, (c): the partial enlargement cycles of ACF-raw with the horizontal axis of logarithmic coordinate, (d): the partial enlargement cycles of ACFL-8-30 with the horizontal axis of logarithmic coordinate.
Fig. 14. Water vapor adsorption stabilities on ACF-raw, ACFL8-15 and ACFL8-30.
参考文献:Y. Huang, Q. Yu, M. Li, S. Jin, J. Fan, L. Zhao, Z. Yao, Surface modification of activated carbon fiber by low-temperature oxygen plasma: Textural property, surface chemistry, and the effect of water vapor adsorption, Chem. Eng. J. (2021) 129474, DOI:10.1016/j.cej.2021.129474.原文链接:https://www.sciencedirect.com/science/article/pii/S1385894721010615