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Preparation and characterization of self-assembly hydrogels with exfoliated montmorillonite nanosheets and chitosan

机译：用剥落的蒙脱石纳米液和壳聚糖的自组装水凝胶的制备与表征

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摘要

Novel montmorillonite-nanosheet/chitosan (MMTNS/CS) hydrogels fabricated via the self-assembly of exfoliated MMTNS and CS chains were investigated. The exfoliation of MMTNS, self-assembly mechanism and structure of MMTNS/CS hydrogels were characterized by an atomic force microscope, scanning electron microscope, transmission electron microscope, Fourier transform infrared spectroscope, energy-dispersive x-ray spectroscope and Brunauer-Emmett-Teller analyzer, respectively. The results indicated that MMT could be easily exfoliated to nanosheets with a thickness of 1 similar to 5 nm in aqueous solution by an ultrasonic base upon interlayer hydration. The formation mechanism of the self-assembly hydrogels was due to the hydrogen bond (-OH center dot center dot center dot +NH3-) and electrostatic interaction between the MMTNS and CS. The MMTNSs were connected consecutively by CS in-plane to form a huge slice. The porous structure of the hydrogels was controllable by adjusting the MMTNS/CS mass ratio. The hydrogels could be used as adsorbents for sewage treatments, carriers for drugs, microorganisms and catalyzers due to their controllable porous structure and tremendous specific surface area which were derived from the completely exfoliated MMTNS.
机译：研究了通过剥离MMTNS和CS链的自组装制造的新型Montmorillonite-Nanosh / Chitosan（MMTNS / CS）水凝胶。通过原子力显微镜，扫描电子显微镜，透射电子显微镜，傅里叶变换红外分光镜，能量分散X射线分光镜和Brunauer-emmett-excharer，以MMTNS，自组装机理和MMTNS / CS水凝胶结构的剥离。分析仪分别。结果表明，通过在层间水合的超声波碱基通过超声波碱基在水溶液中容易地将MMT容易地剥离至厚度1的纳米片。自组装水凝胶的形成机制是由于氢键（-OH中心点中心点中心点+ NH3-）和MMTNS和CS之间的静电相互作用。 MMTNSS通过CS在平面内连续连接，形成巨大的切片。通过调节MMTNS / Cs质量比来控制水凝胶的多孔结构。水凝胶可用作污水处理的吸附剂，药物，微生物和催化剂由于其可控制的多孔结构和巨大的特异性表面积，其衍生自完全剥离的MMTNS。

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  • 来源
    《Nanotechnology》 |2018年第2期|共11页
  • 作者

    Wang Wei; Zhao Yunliang; Yi Hao; Chen Tianxing; Kang Shichang; Li Hongqiang; Song Shaoxian;

  • 作者单位

    Wuhan Univ Technol Sch Resources &

    Environm Engn Luoshi Rd 122 Wuhan 430070 Hubei Peoples R China;

    Wuhan Univ Technol Sch Resources &

    Environm Engn Luoshi Rd 122 Wuhan 430070 Hubei Peoples R China;

    Wuhan Univ Technol Sch Resources &

    Environm Engn Luoshi Rd 122 Wuhan 430070 Hubei Peoples R China;

    Wuhan Univ Technol Sch Resources &

    Environm Engn Luoshi Rd 122 Wuhan 430070 Hubei Peoples R China;

    Wuhan Univ Technol Sch Resources &

    Environm Engn Luoshi Rd 122 Wuhan 430070 Hubei Peoples R China;

    Wuhan Inst Technol Sch Resources &

    Civil Engn Wuhan 430073 Hubei Peoples R China;

    Wuhan Univ Technol Sch Resources &

    Environm Engn Luoshi Rd 122 Wuhan 430070 Hubei Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;
  • 关键词

    montmorillonite; exfoliation; ultrasonic; self-assembly; hydrogels; porous structure;

    机译：蒙脱石;去角质;超声波;自组装;水凝胶;多孔结构;

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