Molecular imprinted polymers for the controlled uptake of sinapic acid from aqueous media.,Food & Function

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Molecular imprinted polymers for the controlled uptake of sinapic acid from aqueous media.
Food & Function ( IF 5.1 ) Pub Date : 2020-01-16 , DOI: 10.1039/c9fo01598a
Roya Fathi Til ₁ , Mohammad Alizadeh-Khaledabad , Reza Mohammadi , Sajad Pirsa , Lee D Wilson

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Several unique molecularly imprinted polymers (MIPs) were synthesized via a precipitation polymerization technique using 4-vinylpyridine as a functional monomer and ethylene glycol dimethacrylate as a cross-linker for selective separation of sinapic acid from aqueous solution. Three sets of MIPs with different functional monomer : cross-linker molar ratios at 4 : 20; 8 : 20 and 8 : 32 were prepared along with the corresponding non-templated polymers (NIPs). The MIPs and NIPs were characterized by scanning electron microscopy, dynamic light scattering, N2 adsorption analysis, thermogravimetry, and FT-IR/solids 13C NMR spectroscopy. Batch rebinding and selectivity experiments were carried out to evaluate their adsorption performance, where the MIP prepared with a 4 : 20 monomer : cross-linker mole ratio had significantly higher affinity toward sinapic acid. Notably, all MIPs displayed greater molecular recognition with sinapic acid relative to the NIPs. Therefore, MIPs prepared by this approach represent promising advanced materials for the pre-concentration, isolation and enrichment of sinapic acid from complex food matrices or controlled removal from agricultural waste streams.

中文翻译：

分子印迹聚合物可控制从水性介质中摄取芥子酸。

通过沉淀聚合技术，使用4-乙烯基吡啶作为功能单体，并使用乙二醇二甲基丙烯酸酯作为交联剂，从水溶液中选择性分离芥子酸，合成了几种独特的分子印迹聚合物（MIP）。三套具有不同功能单体的MIP：交联剂摩尔比为4:20；制备了8:20和8:32以及相应的非模板聚合物（NIP）。通过扫描电子显微镜，动态光散射，N2吸附分析，热重分析和FT-IR /固体13C NMR光谱对MIP和NIP进行表征。进行了批次重新结合和选择性实验，以评估其吸附性能，其中MIP用4:20单体制备：交联剂摩尔比对芥子酸具有显着更高的亲和力。值得注意的是，相对于NIP，所有芥子酸都显示出更多的芥子酸分子识别能力。因此，通过这种方法制备的MIP代表了从复杂食品基质中预浓缩，分离和富集芥子酸或从农业废物流中进行有控制的去除的有前途的先进材料。

更新日期：2020-02-13

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