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交联聚苯乙烯氯甲基化后,将氯转化为羟基、氨基、甲氧基、苯氧基、4-羟基苯氧基和4-乙酰苯氧基,合成了不同极性的吸附树脂Ⅰ—Ⅵ。同时由交联聚苯乙烯经Friedel-Crafts酰化反应在其苯环上引入乙酰基,制备了树指Ⅶ。用物理技术和化学方法表征树脂Ⅰ—Ⅶ的结构,然后测定了它们对天然皂甙如甜菊甙和绞股蓝皂甙的吸附量。结果说明,这些树脂亲水性较好,均能吸附天然皂甙,但只有中极性的酮基树脂Ⅵ和Ⅶ的吸附量较大。
After chloromethylation of crosslinked polystyrene, the chlorine was converted into hydroxyl, amino, methoxy, phenoxy, 4-hydroxyphenoxy and 4-acetylalkoxy groups, and the adsorption resins Ⅰ -VI. At the same time by the cross-linked polystyrene by Friedel-Crafts acylation in the benzene ring on the introduction of acetyl, prepared finger Ⅶ. The structures of resins I-VII were characterized by both physical and chemical methods and their amounts of adsorption to natural saponins such as stevioside and gypenoside were determined. The results show that these resins are better hydrophilic, can absorb natural saponins, but only the polar ketone resin Ⅵ and Ⅶ adsorption capacity larger.