Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan, 030008, China.
Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Taiyuan, 030001, China.
Nanoscale Res Lett. 2016 Dec;11(1):361. doi: 10.1186/s11671-016-1569-4. Epub 2016 Aug 12.
In this work, mesostructure evolution of ordered mesoporous carbons (OMCs) from the 2-D hexagonal (space group p6mm) to the discontinuous cubic [Formula: see text], then towards the face-centered cubic lattice [Formula: see text], and finally, to the simple cubic Pm3n is achieved by simply adjusting the cosolvent water content of the mixed solvents water/ethanol in the presence of a reverse nonionic triblock copolymer and low molecular resin by evaporation-induced self-assembly method. Experimental results demonstrate that both the cosolvent and the reverse triblock copolymer play a key role in the mesophase transitions of OMCs. Furthermore, the OMCs with Pm3n symmetry are reported for the first time. Finally, the mechanism of mesostructure transition was discussed and proposed.
在这项工作中，通过蒸发诱导自组装法，在反离子两亲嵌段共聚物和低分子树脂的存在下，通过简单调节混合溶剂水/乙醇中水的共溶剂含量，将有序介孔碳（OMC）的二维六方（空间群 p6mm）结构连续立方[化学式：见正文]结构转变为面心立方晶格[化学式：见正文]，最后转变为简单立方 Pm3n。实验结果表明，共溶剂和反离子两亲嵌段共聚物在 OMC 介孔转变中都起着关键作用。此外，首次报道了具有 Pm3n 对称的 OMC。最后，讨论并提出了介观结构转变的机理。
