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首页> 外文期刊>ACS applied materials & interfaces >Highly Porous Acrylonitrile-Based Submicron Particles for UI2~(2+) Absorption in an Immunosensor Assay
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Highly Porous Acrylonitrile-Based Submicron Particles for UI2~(2+) Absorption in an Immunosensor Assay

机译：高度多孔的基于丙烯腈的亚微米颗粒用于免疫传感器测定中的UI2〜（2+）吸收

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Our laboratory has previously reported an antibody-based assay for hexavalent uranium (UO2~(2+)) that could be used on-site to rapidly assess uranium contamination in environmental water samples (Melton, S. J.; et al. Environ. Sci. Technol. 2009, 43, 6703-6709). To extend the utility of this assay to less-characterized sites of uranium contamination, we required a uranium-specific adsorbent that would rapidly remove the uranium from groundwater samples, while leaving the concentrations of other ions in the groundwater relatively unaltered. This study describes the development of hydrogel particlescontaining amidoxime groups that can rapidly and selectively facilitate the uptake of uranyl ions. A miniemulsion polymerization technique using SDS micelles was employed for the preparation of the hydrogel as linked submicrometer particles. In polymerization, acrylonitrile was used as the initial monomer, ethylene glycol dimethacrylate as the crosslinker and 2-hydroxymethacrylate, l-vinyl-2-pyrrolidone, acrylic acid, or methacrylic acid were added as co-monomers after the initial seed polymerization of acrylonitrle. The particles were characterized by transmission electron spectroscopy, scanning electron microscopy (SEM) and cryo-SEM. The amidoximated particles were superior to a commercially available resin in their ability to rapidly remove dissolved UO2~(2+) from spiked groundwater samples.
机译：我们的实验室以前曾报告过一种基于抗体的六价铀（UO2〜（2+））检测方法，可用于现场快速评估环境水样品中的铀污染（Melton，SJ; et al。Environ。Sci。Technol 2009，43，6703-6709）。为了将这种测定法的实用性扩展到特征较少的铀污染场所，我们需要一种铀特异性吸附剂，该吸附剂可以快速从地下水样品中去除铀，同时保持地下水中其他离子的浓度相对不变。这项研究描述了含有a胺肟基的水凝胶颗粒的发展，该胺基肟基可以快速，选择性地促进铀酰离子的吸收。使用SDS胶束的细乳液聚合技术用于制备水凝胶，作为连接的亚微米颗粒。在聚合中，丙烯腈的初始种子聚合后，使用丙烯腈作为初始单体，使用乙二醇二甲基丙烯酸酯作为交联剂，并添加2-羟基甲基丙烯酸酯，1-乙烯基-2-吡咯烷酮，丙烯酸或甲基丙烯酸作为共聚单体。通过透射电子光谱，扫描电子显微镜（SEM）和低温SEM来表征颗粒。酰胺化的粒子在从加标的地下水样品中快速去除溶解的UO2〜（2+）的能力优于市售的树脂。

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