沉淀聚合法合成拟除虫菊酯类分子印迹聚合物及其吸附性能研究
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摘要
采用沉淀聚合法,以拟除虫菊酯的结构类似物二苯醚-联苯共晶作为替代模板,优化得到最佳的拟除虫菊酯类分子印迹聚合物合成条件:模板分子(二苯醚-联苯共晶)、功能单体(4-乙烯吡啶)、交联剂(乙二醇二甲基丙烯酸酯)的摩尔比为1∶6∶20,反应温度为70℃,引发剂用量为1%。将合成的分子印迹聚合物通过扫描电镜进行表征,并对吸附性能进行测试,其对60μg·mL~(-1)的二苯醚-联苯共晶的最大吸附量为6 041μg·g~(-1),且在7 h后达到吸附平衡。通过选择性实验得到印迹聚合物对毒死蜱、联苯菊酯、甲氰菊酯、氯菊酯、氯氰菊酯、氰戊菊酯的吸附量分别为259、316、311、271、305、298μg·g~(-1),而非印迹聚合物的吸附量则为169、188、181、183、151、142μg·g~(-1),印迹聚合物的选择性能明显高于非印迹聚合物。
Pyrethroids molecular imprinted polymer were synthesized by precipitation polymerization,using phenyl ether-biphenyl,a structural analogue of pyrethroids as the pseudo-template. The optimal conditions for synthesis were as follows: the ratio of template molecule( phenyl ether-biphenyl),functional monomer(4-vinylpyidine) and cross-linker( ethylene dimethacrylate) was 1 : 6 : 20,the reaction temperature was 70 ℃ and the amount of thermal polymerization initiator was 1%. The synthesized molecularly imprinted polymers were characterized by scanning electron microscopy and their adsorption performances were determined. The maximum adsorption capacity of the polymers toward 60 μg·mL~(-1_ diphenyl ether-biphenyl eutectic was 6 041 μg · g~(-1). Results of the adsorption rate showed that the polymers could reach an adsorption equilibrium after 7 h. The absorption amounts of the synthesized polymers toward chlorpyrifos,bifenthrin,fenpropathrin,permethrin,cypermethrin and fenvalerate were 259,316,311,271,305 and 298 μg·g~(-1),while those of the non-imprinted polymers were 169,188,181,183,151 and 142 μg · g~(-1),respectively. The selectivity of the imprinted polymers is higher than that of the non-imprinted polymers.
Pyrethroids molecular imprinted polymer were synthesized by precipitation polymerization,using phenyl ether-biphenyl,a structural analogue of pyrethroids as the pseudo-template. The optimal conditions for synthesis were as follows: the ratio of template molecule( phenyl ether-biphenyl),functional monomer(4-vinylpyidine) and cross-linker( ethylene dimethacrylate) was 1 : 6 : 20,the reaction temperature was 70 ℃ and the amount of thermal polymerization initiator was 1%. The synthesized molecularly imprinted polymers were characterized by scanning electron microscopy and their adsorption performances were determined. The maximum adsorption capacity of the polymers toward 60 μg·mL~(-1_ diphenyl ether-biphenyl eutectic was 6 041 μg · g~(-1). Results of the adsorption rate showed that the polymers could reach an adsorption equilibrium after 7 h. The absorption amounts of the synthesized polymers toward chlorpyrifos,bifenthrin,fenpropathrin,permethrin,cypermethrin and fenvalerate were 259,316,311,271,305 and 298 μg·g~(-1),while those of the non-imprinted polymers were 169,188,181,183,151 and 142 μg · g~(-1),respectively. The selectivity of the imprinted polymers is higher than that of the non-imprinted polymers.
引文
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[3]Kathryn M K,Michelle L H,Christopher G I,Nile E K,Patrick W M,Daniel L C,Lisa H N,Robert J G.Environ.Sci.Technol.,2012,46(8):4297-4303.
[4]Weston D P,Holmes R W,You J,Lydy M J.Environ.Sci.Technol.,2005,39(24):9778-9784.
[5]Lei W,Wang D D,Dou T Y,Hou J,Feng L,Yin H,Luo Q,Sun J,Ge G B,Yang L.Toxicol.Appl.Pharm.,2017,321:48-56.
[6]Maretova E,Maretta M,Legath J.Animal Reprod.Sci.,2017,184:132-138.
[7]Philippe G,Tania S,Morgane F,Chatiline W,Christine M,Sylvaine C,Jean F V,Florent L G,Barbara L B,Cecile C.Environ.Int.,2017,104:76-82.
[8]Chen H,Chen R W,Li S Q.J.Chromatogr.A,2010,1217(8):1244-1248.
[9]Moloney M,Tuck S,Ramkumar A,Furey A,Danaher M.J.Chromatogr.B,2018,1077/1078:60-70.
[10]Suganthi A,Bhuvansewari K,Ramya M.Food Chem.,2018,241:275-280.
[11]Chen Y,Guo Z P,Wang X Y,Qiu C G.J.Chromatogr.A,2008,1184(1/2):191-219.
[12]Li R J,He Q,Hu Z,Zhang S R,Zhang S R,Zhang L J,Chang X J.Anal.Chim.Acta,2012,713:136-144.
[13]Mohammad B,Azam A,Mostafa M A,Ahmad S B,Fariborz O.RSC Adv.,2015,5(84):68500-68509.
[14]Pereira I,Rodrigues M F,Chaves A R,Boniek G V.Talanta,2018,178:507-517.
[15]Esteban A M.Tr AC Trends Anal.Chem.,2013,45:169-181.
[16]Kubo T,Hosoya K,Watabe Y,Ikeqami T,Tanaka N,Sano T,Kaya K.J.Chromatogr.A,2004,1029(1/2):37-41.