National Institute of Advanced Industrial Science, Technology (AIST), Shimoshidami, Moriyama-ku, Nagoya 463-8560, Japan.
Langmuir. 2012 Sep 4;28(35):12901-8. doi: 10.1021/la302695q. Epub 2012 Aug 23.
A wide variety of synthetic approaches from homogeneous precursor solutions have so far been developed for precise structural design of materials in multiscale. In organic templating approaches for porous materials design, we have recently developed a new approach to fabricate colloidal polystyrene-block-poly(oxyethylene) (PS-b-PEO) templated large pores that can be controlled in thick films of aluminum organophosphonate (AOP). In this study, we extended this approach using colloidal PS-b-PEO aggregates to aerosol-assisted synthesis for the fabrication of spherical particles. Structural variations (morphology and porous structure) depended on the synthetic conditions, which were mainly investigated by using electron microscopies (SEM and TEM). In addition to the insight on the colloidal PS-b-PEO templating of spherical pores in AOP spheres, it was found that colloidal PS-b-PEO aggregates were flexible for further design of pore shape that was strongly affected by external morphology. In this context, we proposed this method as flexible colloidal PS-b-PEO templating to fabricate unusual macroporous structures during morphological control from precursor solutions containing colloidal PS-b-PEO aggregates. The insights will be promising for precise construction of unique devices using porous materials templated by colloidal organic aggregates. In addition, we found a useful water adsorption-desorption behavior over the macroporous AOP bulky powders when the macropores were connected through large pores, which is also significant for future development of AOP-based porous materials.
目前已经开发出了多种从均相前驱体溶液出发的合成方法，用于对多尺度材料进行精确的结构设计。在设计多孔材料的有机模板方法中，我们最近开发了一种新方法，用于制造胶体聚苯乙烯-聚（氧乙烯）（PS-b-PEO）模板大孔，这些大孔可以在铝有机磷酸酯（AOP）的厚膜中进行控制。在这项研究中，我们使用胶体 PS-b-PEO 聚集体扩展了这种方法，用于气溶胶辅助合成来制造球形颗粒。结构变化（形态和多孔结构）取决于合成条件，主要通过电子显微镜（SEM 和 TEM）进行研究。除了对 AOP 球体中胶体 PS-b-PEO 模板化球形孔的深入了解外，还发现胶体 PS-b-PEO 聚集体具有灵活性，可以进一步设计孔形状，而孔形状强烈受到外部形态的影响。在这种情况下，我们提出了这种方法作为灵活的胶体 PS-b-PEO 模板化方法，用于在含有胶体 PS-b-PEO 聚集体的前驱体溶液中进行形态控制，以制造不常见的大孔结构。这些见解对于使用胶体有机聚集体模板化的多孔材料来精确构建独特的器件将是有前途的。此外，我们发现当大孔通过大孔相互连接时，大孔 AOP 块状粉末具有有用的水吸附-解吸行为，这对于基于 AOP 的多孔材料的未来发展也很重要。
