2,4,6-三氯苯酚分子印迹聚合物的制备及吸附性能研究

Preparation and binding performance of 2,4,6-trichlorophenol molecularly imprinted polymers

以硅胶为载体,2,4,6-三氯苯酚(2,4,6-TCP)为模板分子,4-乙烯吡啶(4-VP)和2-丙烯酰胺-2-甲基丙磺酸(AMPS)为功能单体,三羟甲基丙烷三甲基丙烯酸酯(TRIM)为交联剂,偶氮二异丁腈(AIBN)为引发剂,乙腈为致孔剂,通过分子印迹技术制备了氯代酚纳米印迹聚合物吸附材料(SMIP)。釆用红外光谱法对活化硅胶、SMIP和非印迹聚合物(SNIP)进行表征,采用静态与动态两种方法研究了分子印迹聚合物对2,4,6-TCP的吸附性能。在同样的吸附条件下,通过与其结构类似物2,4-二氯苯酚(2,4-DCP),对特辛基苯酚(POP),壬基酚(NP)及其混合液的吸附对比试验对SMIP的选择性进行了研究。结果表明:SMIP对2,4,6-TCP的最大吸附容量大约为118.77 mg/g,具有良好的选择特异性吸附能力。

In this paper, a surface molecularly imprinted polymer （SMIP） is prepared as the extraction adsorbent, by using silica gel as carrier, 2,4,6 - TCP as template molecule, 4 - vinyl pyridine （4 - VP） and 2 - acryl- amide -2 -methyl propane sulfonie acid （AMPS） as functional monomer, and trimethylol propane trimethacrylate （TRIM） as cross linking agent. The activated silica gel, SMIP and non - molecularly imprinted polymer are characterized by IR spectrometry. The adsorption capacity of SMIP to 2,4,6 -TCP is studied by static and dynamic methods. In addition, the selective adsorption of SMIP is investigated by comparison with its analogs like 2, 4 - dichlorophenol （2,4 -DCP）, special octyl phenol （POP） and nonylphenol （NP）. The results indicate that the maximum adsorption capacity of SMIP to 2,4,6 -TCP is about 118.77 mg/g, and SMIP has a good specific adsorption capacity towards 2, 4, 6 - TCP.