可逆加成-断裂链转移沉淀聚合法制备木犀草素分子印迹聚合物及其表征
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摘要
本文以二苄基三硫代酯(DBTTC)作为可逆加成-断裂链转移(RAFT)试剂,木犀草素为模板分子,丙烯酰胺为功能单体,采用可逆加成-断裂链转移自由基聚合结合沉淀聚合法(RAFTPP)制备分子印迹聚合物。对该条件下制备的印迹聚合物(R-MIPs)与传统沉淀法制备的印迹聚合物(T-MIPs)进行吸附实验和吸附模型分析,测得吸附容量QR-MIPs为32.60mg/g,QT-MIPs为29.06mg/g。印迹聚合物主要形成二种结合位点,吸附行为符合Scatchard模型。将R-MIPs作为固相萃取填料,可用于花生壳中木犀草素的提取,效果良好。
In this paper,molecularly imprinted polymers were prepared with dibenzyl trithioester(DBTTC)as the reversible addition fragmentation chain transfer(RAFT)reagent,luteolin as the template molecule,acrylamide as the functional monomer,using of reversible addition-fragmentation chain transfer radical polymerization combined with precipitation polymerization(RAFTPP).Adsorption experiment and adsorption model analysis of the imprinted polymers(R-MIPs)prepared under the above conditions and the imprinted polymers(T-MIPs)prepared by the conventional precipitation method showed that the adsorption capacity QR-MIPs maxwas 32.60mg/g,and QT-MIPs maxwas 29.06mg/g.The imprinted polymer had two kinds of binding sites,and the adsorption behavior was accorded with Scatchard model.The R-MIPs as a solid phase extraction filler,could be used for extraction of luteolin in peanut shells,and the effect was good.
In this paper,molecularly imprinted polymers were prepared with dibenzyl trithioester(DBTTC)as the reversible addition fragmentation chain transfer(RAFT)reagent,luteolin as the template molecule,acrylamide as the functional monomer,using of reversible addition-fragmentation chain transfer radical polymerization combined with precipitation polymerization(RAFTPP).Adsorption experiment and adsorption model analysis of the imprinted polymers(R-MIPs)prepared under the above conditions and the imprinted polymers(T-MIPs)prepared by the conventional precipitation method showed that the adsorption capacity QR-MIPs maxwas 32.60mg/g,and QT-MIPs maxwas 29.06mg/g.The imprinted polymer had two kinds of binding sites,and the adsorption behavior was accorded with Scatchard model.The R-MIPs as a solid phase extraction filler,could be used for extraction of luteolin in peanut shells,and the effect was good.
引文
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