微反应器中基于溶致液晶模板连续可控制备多形貌银纳米颗粒材料

银纳米颗粒（AgNPs）由于良好的导电、导热、抗菌、光学等特殊性能，已被广泛应用于催化材料、光学材料、生物医疗、新能源以及电子器件等领域。AgNPs的性质和功能取决于其形貌结构、粒径及粒度分布。微反应器具有较大的比表面积和优异的传质传热特性，是一种连续合成粒径均一AgNPs的有效手段，而溶致液晶丰富的相态结构使之成为一种合成各种形貌AgNPs的优良的软模板。本项目拟将二者的优点进行有机结合，在微反应器中基于溶致液晶模板连续可控制备多形貌结构、粒径均一的AgNPs。通过建立微反应器构型与不同表面活性剂/溶剂多元体系的液晶相结构的构效关系，阐明不同操作条件、还原剂类型及浓度与AgNPs沉淀反应、成核、生长及团聚作用机制，旨在为实现对AgNPs形貌结构、粒径及粒度分布的精确控制与连续化合成工艺提供理论依据和技术支撑，并以期将该工艺进一步推广到其他贵金属纳米颗粒材料的合成。

With excellent capacities of thermo/electrical conductivity, antibiosis, optical property and other special properties, silver nanoparticles (AgNPs) have been extensively applied in the fields of catalysis, optics, biomedical, new energy and electronics. The properties and functions of AgNPs highly depend on its morphology, dimension and size distribution. Due to the advantages of high specific surface area and excellent heat/mass transfer abilities, continuous synthesis of AgNPs in microreactor is an efficient way to obtain AgNPs with uniform size, meanwhile, lyotropic liquid crystal is a promising soft template for the synthesis of multiple AgNPs shapes due to its diverse liquid crystalline phases. Combining both advantages of microreactor and lyotropic liquid crystal, this project aims to continuously synthesize AgNPs with controlled morphology and size via lyotropic liquid crystal templates in microreactors. The relationship between the microreactor structures and lyotropic liquid crystalline phase response will be investigated. The effect mechanism of operating conditions, types and concentrations of reducing agent on the Ag precipitation reaction, nucleation, growth and aggregation will be clarified. The upcoming results from this project will provide theoretical and technical supports for precisely synthesis of AgNPs in microreactors, as well as extending this technology to other noble metal nanomaterials.