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首页> 外文期刊>Lab on a chip >Fabrication of monolayers of uniform polymeric particles by inkjet printing of monodisperse emulsions produced by microfluidics
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Fabrication of monolayers of uniform polymeric particles by inkjet printing of monodisperse emulsions produced by microfluidics

机译：通过微流体产生的单分散乳液的喷墨印刷制备均匀聚合物颗粒的单层

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Emulsion solvent evaporation is a well-established method for generating microparticles from solutions of polymers in volatile organic solvents dispersed in an aqueous medium. Previous work has shown that this approach can also be used to deposit particles by inkjet printing where the particles are formed during the drying of a liquid ink on a substrate. The particle size distribution, however, was very broad. Here we demonstrate that inkjet printing of oil-in-water emulsions produced by microfluidics can generate micron-sized particles with a narrow size distribution (coefficient of variation <6%) and that these particles can self-assemble into ordered arrays with hexagonal packing. The conditions under which drops can be printed with a minimum of break up and coalescence of the oil droplets in the emulsion are explored. Factors affecting the size of the particles and the morphology of the deposit are described. This study uses polystyrene in dichloromethane as a model system, but the approach can be generalized to the production of structured and functional particles.
机译：乳液溶剂蒸发是一种良好的方法，用于从分散在水性介质中的挥发性有机溶剂中产生微粒的微粒。以前的工作表明，这种方法还可用于通过喷墨印刷沉积颗粒，其中颗粒在液体墨水的干燥过程中形成。然而，粒度分布非常宽。在这里，我们证明了通过微流体产生的水包油乳液的喷墨印刷可以产生具有窄尺寸分布（变异系数<6％）的微米尺寸颗粒，并且这些颗粒可以用六边形包装自组装成有序阵列。探讨了液滴印刷下降的条件，并探讨了乳液中的油滴中的油滴的聚结。描述了影响粒子尺寸和沉积物形态的因素。该研究使用二氯甲烷中的聚苯乙烯作为模型系统，但该方法可以推广到结构化和功能颗粒的产生。

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