Well-ordered mesoporous polymers and carbons based on imide-incorporated soft materials
Well-ordered mesoporous polymers and carbons based on imide-incorporated soft materials
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DOI：
10.1039/c4py00373j
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发表时间：
2014-11-21
影响因子：
4.6
通讯作者：
Hayakawa, Teruaki
中科院分区：
文献类型：
--
作者：
Liu, Yuanyuan;Ohnishi, Koshi;Hayakawa, Teruaki
通过直接掺杂和软模板方法制备有序的功能介孔聚合物仍然具有挑战性，并且迄今为止仅局限于特定系统，因为难以平衡模板和前体之间的相互作用。在此，我们证明了使用高度稳定的芳香族酰亚胺作为氮源，成功制备了酰亚胺功能化介孔聚合物及其衍生的具有高规整性、可调形貌和高表面积的氮掺杂介孔碳。酰胺酸是酰亚胺的前体，与两亲性嵌段共聚物模板发生共自组装过程，并在加热时转化为酰亚胺。在 350 摄氏度下煅烧后，模板 F127 被去除，而不会损坏酰亚胺键，从而形成具有固有酰亚胺官能团的高度有序的聚合物网络。在 600 摄氏度下进一步碳化可以形成氮掺杂介孔碳。这种新开发的系统表现出高度的灵活性，可以在系统中每个组件的调整的基础上对一维层状、二维六边形和3维立方介观结构进行精确的形态控制。该同系系列酰亚胺功能化介孔聚合物和氮掺杂介孔碳在先进材料领域具有潜在的应用前景。
The preparation of well-ordered functional mesoporous polymers through the direct doping and soft templating approach remains challenging and has so far been only limited to specific systems, because of the difficulty to balance the interaction between templates and precursors. Herein we demonstrate the successful preparation of an imide-functionalized mesoporous polymer and its derived nitrogen-doped mesoporous carbon with high regularity, tunable morphology, and high surface area, using highly stable aromatic imide as the nitrogen source. Amic acid, the precursor of imide, undergoes a co-self-assembly process with an amphiphilic block copolymer template and transforms into imide on heating. Upon calcination at 350 degrees C the template F127 is removed without damaging the imide linkage, leading to a highly ordered polymer network with the intrinsic imide functionality. Further carbonization at 600 degrees C allows the formation of nitrogen-doped mesoporous carbon. This newly developed system, which exhibits a high degree of flexibility, allows precise morphological control of 1-dimensional lamellar, 2-dimensional hexagonal and 3-dimensional cubic mesostructures on the basis of adjustments of each component in the system. This homologous series of imide functionalized mesoporous polymers and nitrogen-doped mesoporous carbons have potential applications in the field of advanced materials.