Self-Propelling Hybrid Gels Incorporating an Active Self-Assembled, Low-Molecular-Weight Gelator.
Self-Propelling Hybrid Gels Incorporating an Active Self-Assembled, Low-Molecular-Weight Gelator.
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DOI：
10.1002/chem.202102472
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发表时间：
2021-10-19
期刊：
影响因子：
--
通讯作者：
Smith DK
中科院分区：
文献类型：
--
作者：
Piras CC;Smith DK
基于低分子量凝胶（LMWG）和聚合物凝胶（PG）的混合凝胶珠在水中表现出增强的自推进能力，其中LMWG发挥了积极作用。混合凝胶珠载有乙醇，由于马兰戈尼效应（由乙醇排出引起的表面张力变化）而在水中移动，小珠比大珠移动得更远更快。混合凝胶的平面形状是用“图章”切割出来的——圆圈移动得最远，而星形则在它们自己的轴上显示出更多的旋转。将混合LMWG/PG凝胶珠与纯PG凝胶珠进行比较，表明LMWG加速了凝胶珠的速度，提高了自推进速率。LMWG自组装成“固体样”网络，防止其从凝胶中浸出。LMWG还保留了自己独特的功能-具体来说，由于非共价相互作用，从碱性水中修复亚甲基蓝污染染料。可移动的杂交珠比纯PG珠更有效地积累这种染料。自推进凝胶珠在环境或生物环境中去除/递送活性剂方面具有潜在的应用。自组装lmwg增强机动性和控制移除/输送的能力表明，将它们添加到自推进系统中可以增加显著的价值。动作捕捉：据报道，将自组装的低分子量凝胶（LMWG）纳入琼脂糖聚合物凝胶颗粒的凝胶珠；当装载乙醇并置于水中时，由于马兰戈尼效应，它们会自我推进。LMWG的存在显著提高了它们的迁移率，并赋予它们独特的功能，例如增强了对污染物染料的吸附能力。
Hybrid gel beads based on combining a low‐molecular‐weight gelator (LMWG) with a polymer gelator (PG) demonstrate an enhanced ability to self‐propel in water, with the LMWG playing an active role. Hybrid gel beads were loaded with ethanol and shown to move in water owing to the Marangoni effect changes in surface tension caused by the expulsion of ethanol – smaller beads move farther and faster than larger beads. Flat shapes of the hybrid gel were cut using a “stamp” – circles moved the furthest, whereas stars showed more rotation on their own axes. Comparing hybrid LMWG/PG gel beads with PG‐only beads demonstrated that the LMWG speeds up the beads, enhancing the rate of self‐propulsion. Self‐assembly of the LMWG into a “solid‐like” network prevents its leaching from the gel. The LMWG also retains its own unique function – specifically, remediating methylene blue pollutant dye from basic water as a result of noncovalent interactions. The mobile hybrid beads accumulate this dye more effectively than PG‐only beads. Self‐propelling gel beads have potential applications in removal/delivery of active agents in environmental or biological settings. The ability of self‐assembling LMWGs to enhance mobility and control removal/delivery suggests that adding them to self‐propelling systems can add significant value. Motion capture: Gel beads that incorporate a self‐assembled low‐molecular‐weight gelator (LMWG) into an agarose polymer gel particle are reported; when loaded with ethanol and placed in water, they self‐propel as a result of the Marangoni effect. The presence of the LMWG significantly increases their mobility and endows them with unique functions, such as enhanced ability to adsorb a pollutant dye.
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影响因子：
4.9
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