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首页> 外文期刊>ACS applied materials & interfaces >Deep-Eutectic Solvents as MWCNT Delivery Vehicles in the Synthesis of Functional Poly(HIPE) Nanocomposites for Applications as Selective Sorbents
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Deep-Eutectic Solvents as MWCNT Delivery Vehicles in the Synthesis of Functional Poly(HIPE) Nanocomposites for Applications as Selective Sorbents

机译：用作多功能吸附剂的功能性聚（HIPE）纳米复合材料的合成中的深共溶剂作为MWCNT传递载体

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摘要

We report an alternative green strategy based on deep-eutectic solvents (DES) to deliver multiwalled carbon nanotubes (MWCNTs) for a bottom-up approach that allows for the selective interfacial functionalization of nonaqueous poly(high internal phase emulsions), poly(HIPEs). The formation and polymerization of methacrylic and styrenic HIPEs were possible through stabilization with nitrogen doped carbon nanotube (CNX) and surfactant mixtures using a urea-choline chloride DES as a delivering phase. Subtle changes in CNX concentration (less than 0.2 wt % to the internal phase) produced important changes in the macroporous monolith functionalization, which in turn led to increased monolith hydrophobicity and pore openness. These materials displayed great oleophilicity with water contact angles as high as 140 making them apt for biodiesel, diesel, and gasoline fuel sorption applications. Overall, styrene divinylbenzene (StDvB) based poly(HIPEs) showed hydrophobicity and fuel sorption capacities as high as 4.8 (g/g). Pore hierarchy, namely pore openness, regulated sorption capacity, and sorption times where greater openness resulted in faster sorption and increased sorption capacity. Monoliths were subject to 20 sorption desorption cycles demonstrating recyclability and stable sorption capacity. Finally, CNX/surfactant hybrids made it possible to reduce surfactant requirements for successful RIPE formation and stabilization during polymerization. All poly(HIPEs) retained acceptable conversion as a function of CNX loading nearing 90% or better with thermal stability as high as 283 degrees C.
机译：我们报告了一种基于深共熔溶剂（DES）的替代绿色策略，可提供一种自下而上的多壁碳纳米管（MWCNT），该方法允许对非水性聚（高内相乳液），聚（HIPEs）进行选择性界面功能化。甲基丙烯酸和苯乙烯类HIPE的形成和聚合是可能的，可以通过使用氮掺杂的碳纳米管（CNX）和表面活性剂混合物（使用尿素-氯化胆碱DES作为传递相）进行稳定化。 CNX浓度的细微变化（相对于内相小于0.2 wt％）在大孔整体式官能化中产生了重要变化，进而导致整体式疏水性和开孔性增加。这些材料具有很高的亲油性，与水的接触角高达140°，非常适合生物柴油，柴油和汽油燃料的吸附应用。总体而言，基于苯乙烯二乙烯基苯（StDvB）的聚（HIPEs）的疏水性和燃料吸附能力高达4.8（g / g）。孔的层次结构，即孔的开放性，调节的吸附能力和吸附时间，其中更大的开放性导致更快的吸附和增加的吸附能力。整料经历了20个吸附解吸循环，证明了可回收性和稳定的吸附能力。最后，CNX /表面活性剂杂化物可以降低表面活性剂对成功进行RIPE形成和聚合过程中稳定化的要求。所有聚（HIPE）都保持可接受的转化率，这是CNX负载的函数，接近90％或更高，热稳定性高达283摄氏度。

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