交联剂对甲基丙烯酸和4-乙烯基吡啶分子印迹聚合物在水介质中的电化学和构象行为的影响

T. Jumadilov, R. Kondaurov, A. Imangazy, Khuangul Khimersen
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引用次数: 0

摘要

合成了基于甲基丙烯酸(MAA)和4-乙烯基吡啶(4VP)两种类型的分子印迹聚合物(MIPs)(类型的不同是基于使用乙二醇二甲基丙烯酸酯(EGDMA)和二乙二醇二甲基丙烯酸酯(DEGDMA)作为交联剂)。以铈盐、镨盐、钕盐、钐盐和铕盐为模板进行合成。还合成了分子印迹聚合物的对照样品(以完全相同的方式合成的样品,但没有模板)。研究了合成结构在水介质中的电化学和构象行为。由于交联紧密,分子印迹聚合物容易发生溶胀和电离,而需要注意的是,高程度的交联会导致大分子结构的高机械强度。将含有模板的分子印迹聚合物的测量参数(电导率,pH值)与MIP对照样品进行比较,表明存在与模板(稀土金属离子)互补的空腔。与在DEGDMA (MIP-2)存在下合成的MIP相比,在EGDMA (MIP-1)存在下合成的MIP由于交联不紧密而具有更高的电导率和pH值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
INFLUENCEOFCROSSLINKINGAGENTON ELECTROCHEMICAL AND CONFORMATIONAL BEHAVIOR OF MOLECULARLY IMPRINTED POLYMERS BASED ON METHACRYLIC ACID AND 4-VINYLPYRIDINE IN AN AQUEOUS MEDIUM
Molecularly imprinted polymers (MIPs) based on methacrylic acid (MAA) and 4-vinylpyridine (4VP) of two types have been synthesized (the difference in types is based on the use of ethylene glycol dimethacrylate (EGDMA) and diethylene glycol dimethacrylate (DEGDMA) as a crosslinking agent). Salts of cerium, praseodymium, neodymium, samarium, and europium were used as templates for the synthesis. Control samples of Molecularly imprinted polymers were also synthesized (samples synthesized in exactly the same way, but without the templates).Electrochemical and conformational behavior of the synthesized structures in an aqueous medium was studied. Molecularly imprinted polymers are weakly exposed to swelling and ionization due to tight crosslinking, while it should be noted that a high degree of crosslinking leads to high mechanical strength of macromolecular structures.Comparison of the measured parameters (electrical conductivity, pH) of molecularly imprinted polymers containing a template with control samples of MIP indicate the presence of cavities complementary to the template (rare-earth metal ion) used in their synthesis. In the presence of MIP synthesized in the presence of EGDMA (MIP-1) higher values of electrical conductivity and pH are observed as compared to MIP synthesized in the presence of DEGDMA (MIP-2) due to less tight crosslinking.
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