聚合物刷负载杂多酸催化剂的制备和表征

Polymer Brushes Supported Heteropolyacid Catalyst:Synthesis and Characterization

杂多酸具有许多优点,在诸多领域展现出广阔的应用前景,聚合物刷载体具有提高催化剂比表面积和反应活性的作用,有望在柴油脱硫等领域得到潜在的应用。本文通过原子转移活性自由基聚合(ATRP)方法制备了二氧化硅/聚甲基丙烯酸二甲氨基乙酯(SiO_2-PDMAEMA)聚合物刷,利用聚合物刷侧链上二甲氨基与磷钼酸的酸碱中和及静电相互作用负载磷钼酸,制备了SiO_2-PDMAEMA-PMoO_(40)催化剂;通过FT-IR、TGA、XRD、TEM对聚合物刷和催化剂的结构、形貌进行了表征,结果表明,制备的催化剂具有高负载、高分散的特点;采用电感耦合等离子发射光谱仪(ICP-OES)测定催化剂磷钼酸的负载量高达52.1%。

SiO_2-PDMAEMA polymer brushes was prepared by Atom Transfer Radical Polymerization（ATRP）.and phosphomo lybdic acid was immobilized in polymer brushes with dimethylamino groups on side chains to synthesize catalyst SiO_2-PDMAEMA -PM0O40.via acid-base neutralization reaction and electrostatic interactions.Structure and morphology of the polymer brushes and catalyst were characterized by FT-IR,TGA,XRD and TEM.The phosphomolybdic acid loading content reached 52.1%. which was determined by ICP-OES.The catalyst prepared in this experiment displays high loading and high dispersion property, and has potential applications in diesel desulfurization field.