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研究了PS微球合成中单体、引发剂和乳化剂浓度以及聚合温度对粒径及分布的影响。采用高速离心沉淀法、恒温加热蒸发诱导法和自然沉降法对单分散PS微球进行了组装,得PS胶体晶体模板,并以其为模板制备了锂离子筛前驱体Li4Mn5O12。用纳米粒度及ZETA电位分析仪、扫描电子显微镜(SEM)、饱和交换容量等表征了材料的粒径及分布、形貌、结构和离子交换性能。结果表明:通过控制反应条件可以在一定范围内制得粒径均一、单分散性好、表面规整光滑的PS微球;PS胶体晶体模板三维有序,排列规整;酸改性后的离子筛前驱体对Li+饱和交换容量为7.49mol/g锂离子筛。
The effects of monomer, initiator and emulsifier concentration and polymerization temperature on the particle size and distribution of PS microspheres were investigated. The monodisperse PS microspheres were assembled by high-speed centrifugal precipitation method, constant temperature heating evaporation induction method and natural sedimentation method to obtain PS colloidal crystal template, and Li4Mn5O12 as a lithium ion sieve precursor was prepared. The particle size, distribution, morphology, structure and ion exchange performance of the materials were characterized by nano-particle size and Zeta potential analyzer, scanning electron microscopy (SEM), saturated exchange capacity and so on. The results show that the PS microspheres with uniform size, monodispersity and smooth surface can be prepared within a certain range by controlling the reaction conditions. The PS colloidal crystal template is three-dimensionally ordered and arranged regularly. The acid-modified ion sieve precursor Body Li + saturation exchange capacity of 7.49mol / g lithium ion sieve.