包覆低共熔溶剂的聚苯乙烯微胶囊吸附Li^(+)的性能研究

Study on Li^(+)adsorption performance of polystyrene microcapsules containing deep eutectic solvents

为实现绿色、低成本从海水中提锂的目标,采用同轴共流微流体技术结合溶剂挥发法制备包覆有低共熔溶剂(甲基三辛基氯化铵/癸酸)的聚苯乙烯微胶囊。所制备的微胶囊颗粒呈均一的球形。将该微胶囊用作萃取Li^(+)吸附剂,系统研究了吸附时间、吸附温度、溶液pH、初始锂浓度和固液比对Li^(+)吸附量和萃取率的影响。结果表明在吸附Li^(+)水溶液时,微胶囊对Li^(+)的最大吸附量为32 mg·g^(-1)。碱性条件时微胶囊对模拟海水中的Li^(+)吸附分配比为10.22 L·g^(-1)。

To achieve environment friendly and low-cost lithium extraction from seawater,a co-axial microfluidic technology combined with a solvent evaporation method was employed to prepare polystyrene microcapsules coating a deep eutectic solvent(methyl trioctyl ammonium chloride/decanoic acid).The resulting microcapsules exhibits uniform spherical morphology.These microcapsules were employed as Li^(+)adsorbents,and a systematic investigation was conducted to study the effects of adsorption time,temperature,solution pH,initial Li^(+)concentration,and solid-liquid ratio on Li^(+)adsorption capacity and extraction efficiency.The results demonstrate a maximum Li^(+)adsorption capacity of 32 mg·g^(-1) when adsorbing Li^(+)from aqueous solutions.Furthermore,the distribution ratio of Li^(+)from simulated seawater by microcapsules is 10.22 L·g^(-1) under alkaline conditions.