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首页> 外文期刊>Chemistry: A European journal >Nanocasting Design and Spatially Selective Sulfonation of Polystyrene-Based Polymer Networks as Solid Acid Catalysts
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Nanocasting Design and Spatially Selective Sulfonation of Polystyrene-Based Polymer Networks as Solid Acid Catalysts

机译：固体酸催化剂的聚苯乙烯基聚合物网络的纳米铸造设计和空间选择性磺化

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摘要

Nanocasting is a general and widely applied method in the generation of porous materials during which a sacrificial solid template is used as a mold on the nanoscale. Ideally, the resulting structure is the inverse of the template. However, replication is not always as direct as anticipated, so the influences of the degree of pore filling and of potential restructuring processes after removal of the template need to be considered. These apparent limitations give rise to opportunities in the synthesis of poly(styrene-co-divinylbenzene) (PSD) polymer networks of widely varying porosities (BET surface area=63-562m(2)g(-1); V-tot=0.18-1.05cm(3)g(-1)) by applying a single synthesis methodology. In addition, spatially selective sulfonation on the nanoscale seems possible. Together, nanocasting and sulfonation enable rational catalyst design. The highly porous nanocast and predominantly surface-sulfonated PSD networks approach the activity of the corresponding molecular catalyst, para-toluenesulfonic acid, and exceed those of commercial ion-exchange polymers in the depolymerization of macromolecular inulin.
机译：在多孔材料的生产中，纳米浇铸是一种普遍且广泛应用的方法，在此过程中，牺牲性固体模板被用作纳米级的模具。理想情况下，结果结构是模板的逆结构。然而，复制并不总是如预期的那样直接，因此在去除模板后，应考虑孔填充程度和潜在的重组过程的影响。这些明显的局限性为孔隙率变化很大（BET表面积= 63-562m（2）g（-1）; V-tot = 0.18的聚苯乙烯-二乙烯基苯）（PSD）聚合物网络的合成提供了机会。 -1.05cm（3）g（-1））通过应用单个合成方法。另外，纳米级的空间选择性磺化似乎是可能的。纳米浇铸和磺化在一起可以实现合理的催化剂设计。高度多孔的纳米浇铸和主要是表面磺化的PSD网络接近相应的分子催化剂对甲苯磺酸的活性，在大分子菊粉解聚中超过了商业离子交换聚合物的活性。

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