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Investigation on polyvinyl-alcohol-based rapidly gelling hydrogels for containment of hazardous chemicals

机译：对危险化学品遏制的聚乙烯醇型快速胶凝水凝胶的研究

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摘要

The specific problem that is of concern here is to stop or at least significantly retard the diffusion of hazardous chemicals which are accidentally released into public places. The solution proposed is to employ rapidly gelling hydrogels that display an effective barrier property to cover the hazardous chemicals. Rapidly gelling hydrogels were prepared by blending a solution of polyvinyl alcohol (PVA) and borax. Sodium alginate (SA) was incorporated so as to improve the stretchability of the PVA-borax crosslinked system. The PVA-SA-borax hydrogels with PVA contents of 15 wt%, SA contents of 0.6 wt%, and borax : PVA ratios of 1 : 25 can be formed within 1 minute, which exhibited self-healing capability and favorable thermal adaptability. The barrier properties of the PVA-SA-borax hydrogels to sodium cyanide, dichlorvos and phorate were investigated, and more than 99% of the sodium cyanide, dichlorvos and phorate can be confined for 24 h by using 10 mm thick hydrogels.
机译：这里令人担忧的具体问题是停止或至少显着延迟危险化学品的扩散，这些化学品意外地释放到公共场所。 提出的解决方案是采用快速胶凝水凝胶，其显示有效的阻隔性以覆盖危险化学品。 通过将聚乙烯醇（PVA）和硼砂溶液混合来制备快速胶凝水凝胶。 掺入藻酸钠（SA），以提高PVA-硼砂交联体系的拉伸性。 PVA-SA-硼砂水凝胶具有PVA含量为15wt％，SA含量为0.6wt％，硼肟：PVA比为1：25，可以在1分钟内形成，其表现出自愈合能力和有利的热适应性。 研究了PVA-SA-硼酸盐水凝胶的阻隔性，氰化钠，二氯硅酸钠和电池钠，含量超过99％的氰化钠，二氯硅酸钠，通过使用10mM厚的水凝胶将局限于24小时。

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  • 来源
    《RSC Advances》 |2016年第75期|共6页
  • 作者

    Yuan Le; Ren Lijun; Tian Xingtao; Huang Zhiping; Xiao YanHua; Wei Sichen; Wang Zhihua;

  • 作者单位

    Beijing Univ Chem Technol State Key Lab Chem Resource Engn Beijing 100029 Peoples R China;

    Inst Chem Def Beijing 102205 Peoples R China;

    Inst Chem Def Beijing 102205 Peoples R China;

    Inst Chem Def Beijing 102205 Peoples R China;

    Inst Chem Def Beijing 102205 Peoples R China;

    Beijing Univ Chem Technol State Key Lab Chem Resource Engn Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol State Key Lab Chem Resource Engn Beijing 100029 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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