FUNCTIONAL MESOPOROUS POLYMER MONOLITH FOR APPLICATION IN ION-EXCHANGE AND CATALYSIS
FUNCTIONAL MESOPOROUS POLYMER MONOLITH FOR APPLICATION IN ION-EXCHANGE AND CATALYSIS
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DOI：
10.1142/s1793604711002317
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发表时间：
2011-12
影响因子：
1.3
通讯作者：
Mahasweta Nandi;K. Okada;H. Uyama
中科院分区：
文献类型：
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作者：
Mahasweta Nandi;K. Okada;H. Uyama
利用 PAN 对水/二甲基亚砜 (DMSO) 混合物的独特亲和力，通过热致相分离技术 (TIPS) 制备了介孔聚丙烯腈 (PAN) 整体材料。通过优化聚合物浓度、水和 DMSO 的比例以及冷却温度来控制聚合物整体的整体微观结构、孔隙率和骨架尺寸。该整体材料通过甲醇羟胺中的-CN官能团的偕胺肟化而被功能化。偕胺肟化PAN整体材料可用作有效的离子交换剂，用于分离不同的金属离子。另一方面，铜(II)交换的偕胺肟化整料可用作在液相条件下使用温和氧化剂叔丁基过氧化氢(TBHP)氧化环烷烃和甲苯的催化剂。
Mesoporous polyacrylonitrile (PAN) monoliths have been prepared by thermally induced phase separation technique (TIPS) using the unique affinity of PAN towards a mixture of water/dimethyl sulphoxide (DMSO). The overall microstructure, porosity and skeleton size of the polymer monoliths are controlled by optimizing the concentration of the polymer, ratio of water and DMSO, and the cooling temperature. The monoliths have been functionalized by amidoximation of the –CN functional groups in methanolic hydroxyl amine. The amidoximated PAN monoliths can be used as efficient ion-exchangers for the separation of different metal ions. On the other hand, the copper(II)-exchanged amidoximated monolith can be used as catalyst for oxidation of cycloalkanes and toluene under liquid-phase condition using mild oxidizing agent, tert-butyl hydroperoxide (TBHP).