pH值触发水池中液体弹珠的可调节爆裂,Journal of Materials Chemistry A

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pH值触发水池中液体弹珠的可调节爆裂
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2023-12-20 , DOI: 10.1039/d3ta06238d
Saurav Kumar ₁ , Nishanta Barman ₁ , Angana Borbora ₁ , Priyam Mondal ₂ , Mizuki Tenjimbayashi ₃ , Uttam Manna _{1,

2,

4}

Affiliation

包裹有微米/亚微米尺寸的疏液固体颗粒和聚集体的不粘毫米级液滴被认为是液体弹珠（LM）。LM 的行为类似于非润湿固体，可以在固体表面和液池上实现零损失传输。挑战在于控制液体释放行为，尤其是在液体池中。例如，尚未实现在指定时间释放LM内部液体以适应液池条件。过去，人们引入了不同的方法来证明在存在特定刺激的情况下内部液体的即时释放，但在文献中关于在存在刺激的情况下控制浮动LM寿命的报道极为罕见。在这种情况下，固有的多孔和结晶纳米材料，即金属有机框架（MOF），被合理地转化为化学反应性纳米材料，用于通过1结合（a）双pH响应性疏水性和（b）非响应性超疏水性。,4-共轭加成反应。此外，应用 Kang-Jacobi 润湿性模型来研究改性 MOF 在不同 pH 下的润湿性转变。疏水性 MOF 产生的 LM 能够在预定时间自动释放内部液体，无需外部干预。此外，质子化胺、不稳定配位键和定制疏水性的战略关联归因于水池中LM的双重（酸性/碱性）刺激响应可调寿命。此类 LM 用于演示 (1) 可调节药物释放，(2) 按需释放反应物以进行化学反应，以及 (3) NO ₂^-的快速光极检测。

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pH-triggered adjustable bursting of liquid marbles in water pools

Non-sticking millimetric droplets wrapped with micron/submicron-sized liquid-repellent solid particles and aggregates are recognized as liquid marbles (LMs). LMs behave like a non-wetting solid, which enables zero-loss transportation on solid surfaces and liquid pools. The challenge is controlling the liquid-releasing behavior, especially in a liquid pool. For example, releasing the inner liquid of LMs at a specified time in adaptation to liquid pool conditions has not been achieved. In the past, different approaches were introduced to demonstrate the instant release of inner liquid in the presence of a specific stimulus, but reports on controlling the lifetime of floating LMs in the presence of a stimulus are extremely rare in the literature. In this context, an inherently porous and crystalline nanomaterial, i.e., metal organic frameworks (MOFs), is rationally transformed into a chemically reactive nanomaterial for associating both (a) dual pH-responsive hydrophobicity and (b) non-responsive superhydrophobicity via a 1,4-conjugate addition reaction. Further, the Kang–Jacobi wettability model was applied to examine the wettability transition of the modified MOFs at different pH. Hydrophobic MOFs yielded LMs with the ability to automatically release inner liquid at a pre-defined time without requiring external intervention. Furthermore, the strategic association of protonizable amines, labile coordination bonds, and the tailored hydrophobicity attributed to the dual (acidic/alkaline) stimulus-responsive adjustable lifetime of LMs in the water pool. Such LMs were utilized for demonstrating an (1) adjustable drug release, (2) on-demand release of the reactants to perform chemical reactions, and (3) rapid optode detection of NO₂⁻.

更新日期：2023-12-20

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