One‐pot route to hyperbranched polyethylenimine‐dictated open cellular monolith as effective and charge‐selective adsorbent

One‐pot route to hyperbranched polyethylenimine‐dictated open cellular monolith as effective and charge‐selective adsorbent
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超支化聚乙烯亚胺的一锅法 - 指定开放式细胞整体作为有效和电荷选择性吸附剂

DOI:
10.1002/app.52722
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发表时间:
2022-06
影响因子:
3
通讯作者:
Decheng Wan
Decheng Wan
中科院分区:
化学3区
文献类型:
--
作者:
Sunkai Xu;Ming Jin;Jiang Du;Decheng Wan

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该研究显示了一种一锅法路线来打开细胞和功能性整料。通过将油滴入微晶纤维素(MC)在支化聚乙烯亚胺(PEI)水溶液中的分散体中,容易形成水包油高或中等内相乳液。交联PEI,然后除去挥发物,得到开放的蜂窝状整料。该策略的关键点在于PEI可以在高pH下充当乳化剂,同时充当反应物,并最终充当吸收组分。结果表明,刚性MC骨架完全覆盖的柔性PEI网络。整体柱的活性胺含量达到3.3 mmol NH/g整体柱。开孔结构源于体积收缩。该多孔单块可以螯合水中的痕量阴离子染料,吸附容量高达440 mg g−1单块,而吸附是高度电荷选择性的。该整料是pH可回收的,并且容易与水分离。
This study shows a one-pot route to open cellular and functional monoliths. An oil-in-water high or medium internal phase emulsion readily forms by dropping oil into a dispersion of microcrystalline cellulose (MC) in aqueous branched polyethylenimine (PEI) solution. Crosslinking of PEI followed by removing the volatile yields an open cellular monolith. The key point of this strategy is that PEI can act as an emulsifier at high pH and simultaneously as reactants and finally as absorbing component. Results show that the rigid MC skeleton is fully covered by the flexible PEI network. The active amine content of the monolith reaches up to 3.3 mmol NH per g monolith. The open-cellular structure stems from volume contraction. The porous monolith can sequester trace anionic dyes in water with an absorbing capacity up to 440 mg g−1 monolith, whereas the adsorption is highly charge-selective. The monolith is pH-recyclable and facilely separable from water.
树枝状两亲物修饰的 PolyHIPE 作为一种高效且可回收的水中微污染物清除剂:拓扑效应
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发表时间: 2002-07-25
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