Preparation and characterization of nanometre silicon-based ionic liquid micro-particle material
Preparation and characterization of nanometre silicon-based ionic liquid micro-particle material
复制标题
纳米硅基离子液体微粒材料的制备及表征
DOI：
10.1016/j.molliq.2020.113327
复制
发表时间：
2020
影响因子：
6
通讯作者：
Zhang Zhibing
中科院分区：
文献类型：
--
作者：
Li Xinyao;Liu Xiemin;Yu Yansong;Long Chao;Zhang Feng;Zhang Zhibing
具有高比表面积的纳米硅和离子液体基微粒（NS-ILMs）有效地克服了离子液体应用中遇到的高粘度限制。NS-ILM的离子液体核具有几微米的直径，为传质和传热提供了足够的界面，加强了离子液体和气体之间的反应或吸收作用。发现颗粒表面的微孔结构有利于气体的通过，从而允许离子液体核。通过挥发性有机化合物（VOC）捕获来评价离子液体对NS-ILM形成的强化作用。与纯离子液体相比，NS-ILM对丙酮蒸气的捕获速度更快，达到最大捕获量的时间缩短了约10倍。基于热重实验，推导出了NS-ILM捕获丙酮蒸气的动力学模型，表明捕获过程大于内部离子液体的吸收。
The nano-silicon and ionic liquid-based micro-particles (NS-ILMs) with a high specific surface area effectively overcame the limit of high viscosity encountered in the application of ionic liquids. The ionic liquid cores of NS-ILMs, which have diameters of a few microns, provide a sufficient interface for mass and heat transfer, strengthening the action between ionic liquids and gases for reactions or absorption. The microporous structures of the particle surface were found to facilitate the passage of gases, allowing with the ionic liquid core. The intensification of NS-ILM formation on application of the ionic liquid was evaluated by volatile organic compounds (VOC) capture. Acetone vapour capture in NS-ILMs was much faster than that in pure ionic liquids, and the time to reach the maximum trapping capacity was shortened by approximately ten fold. Based on thermogravimetric experiments, a dynamic model for acetone vapour capture by NS-ILMs was derived, indicating that the capture process is greater than the absorption by the internal ionic liquid.