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Magnetic thermoresponsive ionic nanogels as novel draw agents in forward osmosis

机译：磁热反应离子纳米凝胶作为前进渗透的新型吸引剂

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Magnetic poly(N-isopropylacrylamide-co-sodium 2-acrylamido-2-methylpropane sulfonate) (denoted as Fe3O4@P(NIPAM-co-AMPS)) nanogels were prepared based on strong ionic monomer AMPS and thermosensitive monomer NIPAM via precipitation polymerization in the presence of Fe3O4 nanoparticles and investigated as draw solutes in forward osmosis (FO). The magnetic nanogels were characterized by Fourier-transform infrared spectroscopy, transmission electron microscopy, dynamic light scattering, X-ray diffraction, and vibrating sample magnetometry, respectively, indicating that they exhibited a core-shell structure, thermosensitivity and superparamagnetic properties. These properties would provide benefits for recovering these nanogels after FO. The water flux yielded by Fe3O4@P(NIPAM-co-AMPS) nanogels in FO was investigated compared with magnetic weak ionic nanogels based on poly(N-isopropylacrylamide-co-acrylic acid) under the same operating conditions. The results show that the water flux yielded by Fe3O4@P(NIPAM-co-AMPS) nanogels is 2.4 times higher than the later. Furthermore, the water flux increases with the increase of nanogel concentration in the draw solution. Especially, due to the existence of thermosensitive poly(N-isopropylacrylamide) segments in Fe3O4@P(NIPAM-co-AMPS) nanogels, these nanogels can be recovered from the diluted draw solution quickly under an external magnetic field combined with a thermal stimulus, resulting in an improvement of the recovery efficiency.
机译：磁聚（N-异丙基丙烯酰胺 - 共钠2-丙烯酰胺-2-甲基丙烷磺酸盐）（表示为FE3O4 @ P（NIPAM-CO-AMPS））纳米粒子，基于强离子单体AMPS和热敏单体NIPAM通过沉淀聚合制备Fe3O4纳米颗粒的存在并研究如前渗透（Fo）的溶质。磁性纳米凝胶的特征在于，傅里叶变换红外光谱，透射电子显微镜，动态光散射，X射线衍射和振动样品磁体，表明它们表现出核心壳结构，热敏感性和超顺磁性。这些性质将提供在佛教之后回收这些纳米凝胶的益处。在相同的操作条件下与基于聚（N-异丙基丙烯酰胺 - 共丙烯酸）的磁弱离子纳米凝胶相比，在FO的Fe3O4 @ P（NIPAM-CO-CO-AMPS）纳米凝胶中产生的水通量。结果表明，Fe3O4 @ P（NIPAM-CO-AMPS）纳米凝胶产生的水通量比后后的2.4倍。此外，随着纳米凝胶浓度的增加，水通量随着纳米凝胶浓度的增加而增加。特别是，由于Fe3O4 @ P（NiPam-Co-AMPS）纳米凝块中的热敏聚（N-异丙基丙烯酰胺）段的存在，可以在与热刺激结合的外部磁场下快速地从稀释的​​拉伸溶液中回收这些纳米凝块，导致改善恢复效率。

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  • 来源
    《RSC Advances》 |2015年第20期|共7页
  • 作者

    Zhou Aijiao; Luo Huayong; Wang Qin; Chen Lin; Zhang Tian C.; Tao Tao;

  • 作者单位

    Huazhong Univ Sci &

    Technol Sch Environm Sci &

    Technol Wuhan 430074 Peoples R China;

    Huazhong Univ Sci &

    Technol Sch Environm Sci &

    Technol Wuhan 430074 Peoples R China;

    Huazhong Univ Sci &

    Technol Sch Chem &

    Chem Engn Wuhan 430074 Peoples R China;

    Huazhong Univ Sci &

    Technol Sch Environm Sci &

    Technol Wuhan 430074 Peoples R China;

    Univ Nebraska Dept Civil Engn Lincoln NE 68588 USA;

    Huazhong Univ Sci &

    Technol Sch Environm Sci &

    Technol Wuhan 430074 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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