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Ionic liquid functionalization - an effective way to tune carbon dioxide adsorption properties of carbon nanotubes

机译：离子液体功能化-调整碳纳米管对二氧化碳吸附性能的有效方法

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In this research, the influence of non-covalent functionalization by ionic liquids on carbon dioxide (CO2) adsorption-desorption properties of multi-walled carbon nanotubes (MWNTs) and partially exfoliated MWNTs (PEMWNTs) has been studied. In addition, the effect of polymerization of the ionic liquid on CO2 adsorption-desorption properties has also been studied at low pressures (<100 kPa) and at different temperatures. The thermodynamic parameters were also determined. It was found that ionic liquid functionalization significantly improved the adsorption capacity through weak CO2 complex formation with the substituted nitrogen of the imidazolium cation. Furthermore, the adsorption isotherm analysis suggested that the residual functional groups were more affine compared to the ionic liquid moieties. The heat of adsorption behaves differently upon polymerization of the ionic liquid on both substrates. The influence of polymerization on the entropy change was much more significant with the MWNTs substrate, whereas it was negligible with PEMWNTs.
机译：在这项研究中，研究了离子液体的非共价官能化对多壁碳纳米管（MWNTs）和部分剥离的MWNTs（PEMWNTs）的二氧化碳（CO2）吸附-解吸性能的影响。此外，还研究了在低压（<100 kPa）和不同温度下离子液体聚合对CO2吸附-脱附性能的影响。还确定了热力学参数。已经发现，通过用咪唑鎓阳离子的取代氮形成弱的CO 2络合物，离子液体官能化显着提高了吸附能力。此外，吸附等温线分析表明，与离子液体部分相比，残留官能团的亲和力更高。离子液体在两个基材上聚合后，吸附热的行为会有所不同。在MWNTs底物上，聚合对熵变的影响要大得多，而对于PEMWNTs，其影响可忽略不计。

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