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首页> 外文期刊>RSC Advances >Synthesis, structure and thermal properties of montmorillonite/ionic liquid ionogels
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Synthesis, structure and thermal properties of montmorillonite/ionic liquid ionogels

机译：蒙脱石/离子液体离子凝胶的合成，结构和热性能

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摘要

Sodium montmorillonite (Na-MMT) was synthesized as a result of two-stage processing of natural bentonite (Bent), and its particle-size distribution, structure and morphology were studied. It was found that the two-stage processing of the original clay resulted in a significant increase in the specific surface area (from 72 to 120 m ~(2) g ~(?1) ). The prepared Na-MMT powder was modified by two ionic liquids (ILs), namely, 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMImNTf _(2) ) and 1-butyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl)imide (BMImNTf _(2) ). Several methods, such as SEM, XRD, TG, DSC, FTIR spectroscopy were used to study the structure and thermal behavior of the produced ionogels. The effects of the IL cation on thermal characteristics of the Na-MMT/IL ionogels were studied. Using the DSC, characteristic temperatures of glass transition, crystallization and melting were determined for Na-MMT/IL composites. Taking into account the literature data and using the method of thermogravimetric analysis, it was shown that ionogel formation was accompanied by a decrease in the thermal stability of the IL.
机译：作为天然膨润土（弯曲）的两阶段加工，合成了蒙脱石（NA-MMT），研究了其粒度分布，结构和形态。发现原始粘土的两级加工导致比表面积显着增加（从72-120m〜（2）g〜（β1））。制备的Na-MMT粉末通过两个离子液体（ILS），即1-乙基-3-甲基咪唑酰亚胺（三氟甲基磺酰基）酰亚胺（ImimnTF _（2））和1-丁基-3-甲基 - 咪唑鎓双（三氟甲基磺酰基）IMIDE（BMIMNTF _（2））。使用诸如SEM，XRD，TG，DSC，FTIR光谱，FTIR光谱的几种方法用于研究所产生的IONOGEL的结构和热行为。研究了IL阳离子对Na-MMT / IL离子凝胶的热特性的影响。使用DSC，针对Na-MMT / IL复合物测定玻璃化转变，结晶和熔化的特征温度。考虑到文献数据并使用热重分析方法，显示了离子凝胶形成伴随着IL的热稳定性的降低。

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