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In-Situ Injectable Physically and Chemically Gelling NIPAAm-Based Copolymer System for Embolization

机译:用于栓塞的就地可注射物理和化学胶凝NIPAAm基共聚物体系

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摘要

The goal of this work is to make an injectable physically and chemically cross-linking NIPAAm-based copolymer system for endovascular embolization.A copolymer with N-isopropylacrylamide (NIPAAm) and hydroxyethyl methacrylate (HEMA) was synthesized and converted to poly(NIPAAm-co-HEMA-acrylate) functionalized with olefins.When poly(NIPAAm-co-HEMA-acrylate) was mixed with pentaerythritol tetrakis 3-mercaptopropionate (QT) stoichiometrically in a 0.1 N PBS solution of pH 7.4,it formed a temperature-sensitive hydrogel with low swelling through the Michael-type addition reaction and showed improved elastic properties at low frequency compared to physical gelation.This material could be useful for applications requiring water-soluble injection but lower swelling and lower creep properties than available with other soluble in-situ-gelling materials.
机译:这项工作的目标是制造一种可注射的物理和化学交联的基于NIPAAm的共聚物,用于血管内栓塞。合成了具有N-异丙基丙烯酰胺(NIPAAm)和甲基丙烯酸羟乙酯(HEMA)的共聚物,并将其转化为聚(NIPAAm-co -HEMA-丙烯酸酯)用烯烃官能化。当将聚(NIPAAm-co-HEMA-丙烯酸酯)与季戊四醇四巯基3-巯基丙酸酯(QT)按化学计量混合在pH值为7.4的0.1 N PBS溶液中时,与与物理胶凝相比,通过迈克尔型加成反应具有较低的溶胀性,并且在低频下显示出改善的弹性。这种材料可用于需要水溶性注射剂的材料,但其溶胀性和蠕变性能比其他可溶性原位材料低胶凝材料。

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