硅基高交联磺化PS-DVB离子交换剂的研究

Preparation of a Silica-based Sulfonated Hypercrosslinked Polystyrene- Divinylbenzene Strong Cation-exchanger

采用活化硅小球与双乙烯基封头剂反应制得乙烯基硅烷键合相,在过氧化苯甲酰诱发下,乙烯基硅烷键合相进一步与苯乙烯(PS)以及二乙烯基苯(DVB)混合单体共聚制得硅基PS-DVB,该硅基PS-DVB共聚物在冰水浴中用氯磺酸磺化制得一种硅基高交联磺化PS-DVB离子交换剂。用红外光谱表征磺化前后及经强碱处理过的离子交换剂,结果发现苯环特征吸收峰的相对强度无明显降低,表明该硅基离子交换剂具有很好的耐酸碱稳定性。用该离子交换剂分离碱性化合物,获得了较好的分离效果。

Preparation of a silica-based sulfonated hypercrosslinked polystyrene- divinylbenzene strong cation-exchanger was reported. Silica beads of an average particle size of approximately 5 μm were first reacted with divinyltetramethyl disiloxane to prepare the vinylated silica phase. The vinylated silica phase was then copolymerized with a monomer mixture of styrene- divinylbenzene（ 2 ∶ 1）,and the hypercrosslinked polystyrene- divinylbenzene（ HCL PS- DVB） derivated silica phase was prepared. And at last,the HCL PS- DVB silica phase was sulfonated to prepare the cation-exchanger in an ice water bath. The strong cation-exchanger was characterized using infrared spectra. The cation-exchanger was proved to be stable in extreme acidic and in extreme basic solutions. The strong cation-exchanger was applied in the separation of basic organics with a good separation result.