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化学学报
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化学学报 ›› 2010, Vol. 68 ›› Issue (05): 453-456. 上一篇    下一篇

研究简报

甲氧基修饰的大孔交联树脂对苯酚的吸附机理

王小梅*，赵晨曦，彭霞辉，唐开军   

  1. (长沙学院生物工程与环境科学系 长沙 410003)
  • 投稿日期:2009-04-10 修回日期:2009-09-01 发布日期:2010-03-14
  • 通讯作者: 王小梅 E-mail:wxm@ccsu.cn

Adsorption Mechanism of Methoxy Modified Macroporous Crosslinked Resin for Phenol

Wang Xiaomei* Zhao Chenxi Peng Xiahui Tang Kaijun   

  1. (Department of Bioengineering and Environmental Science, Changsha University, Changsha 410003)
  • Received:2009-04-10 Revised:2009-09-01 Published:2010-03-14

PDF

1095

被引次数

9 | 1

由大孔氯甲基化聚苯乙烯合成了含有悬挂醚键的甲氧基修饰的大孔交联树脂. 通过化学分析(氯含量的测定)、红外光谱和元素分析等手段, 确证甲氧基负载在聚苯乙烯骨架上, 负载量为4.10 mmol/g. 测定了这种树脂对正己烷中苯酚的吸附等温线, 表明其对正己烷中苯酚的吸附是放热的, 随着温度的升高, 吸附量逐渐降低, 且吸附等温线可拟合成直线. 通过吸附焓的计算、不同条件下吸附等温线的比较以及理论计算等方法, 确证氢键是甲氧基修饰的大孔交联树脂吸附正己烷中苯酚的主要驱动力, 树脂骨架上负载的醚氧原子与苯酚的酚羟基氢原子形成了强烈氢键.

关键词: 悬挂醚键, 吸附树脂, 吸附, 苯酚, 氢键

Methoxy modified macroporous crosslinked resin was prepared from macroporous crosslinked chloromethylated polystyrene. Its chemical structure was characterized by chemical analysis (measurement of chlorine content), infrared spectrum and elemental analysis, and it was shown that 4.10 mmol/g of methoxy groups were uploaded onto the skeleton of polystyrene. The adsorption isotherms of the obtained resin for phenol were measured in hexane and it was seen that the adsorption isotherms could be correlated to straight lines and plots of the straight line decreased with increasing of the temperature. According to the calculated adsorption enthalpy, comparison of the adsorption isotherms in different conditions, and theoretical calculation, hydrogen bonding was elucidated to be the principal driving force for the adsorption, and the oxygen atom of ether bond of the prepared resin forms strong hydrogen bonding with the hydrogen atom of phenolic hydroxyl group of phenol.

Key words: pendent ether bond, polymeric adsorbent, adsorption, phenol, hydrogen bonding