The present paper reports a continuous microfluidic approach for the preparation of microcapsules (MCs), by interfacial polymerization, with a polyurea/polyurethane (PUa/PU) shell containing isophorone diisocyanate (IPDI). The microfluidic system enables the formation of a monodisperse oil-in-water (O/W) emulsion by a separate flow of the reagents along the tubing system, which posteriorly meet at a cross-junction, resulting in the precise formation of one emulsion droplet at a time. The developed MCs are intended to be part of a new monocomponent, autoreactive and ecological adhesive, as cross-linking agents. Critical operational parameters in the microfluidic process were investigated, namely the flow rate of the emulsion phases, the cross-junction’s configuration and its correlation with the MCs’ morphology, average diameter, size distribution and amount of encapsulated isocyanate. The advances achieved in the current study represent a contribution to the development of new sustainable and eco-friendly products, where the employment of monodisperse MCs is an advantage.

本论文报道了一种连续微流体方法，该方法通过界面聚合，使用含有异佛尔酮二异氰酸酯（IPDI）的聚脲/聚氨酯（PUa / PU）壳，制备微胶囊（MC）。微流体系统通过试剂沿着管道系统的单独流动而形成单分散的水包油（O / W）乳剂，该乳剂在后交叉点相遇，从而精确地形成了一个乳剂液滴一次。研发的MC有望成为新型单组分，自反应性和生态胶粘剂的一部分，作为交联剂。研究了微流体过程中的关键操作参数，即乳液相的流速，交叉结的构型及其与MC形态，平均直径，尺寸分布和包封的异氰酸酯的量。本研究取得的进展代表了对开发新型可持续性和生态友好型产品的贡献，在这些产品中，使用单分散型多聚羧甲基纤维素是一个优势。