Commercial polyamide membranes for seawater desalination and water purification have low water permeability because of their relatively thick rejection layers. We report a novel interfacial polymerization method for synthesizing ultrathin polyamide layers with a precisely controllable thickness. Monomer solutions of m-phenylenediamine and trimesoyl chloride were electrosprayed into fine microdroplets. The polymerization reaction between microdroplets of different monomers leads to a fine and controllable amount of deposition. We fabricated smooth polyamide layers from 4 nm to several tens of nanometers in thickness, with a growth rate of approximately 1 nm/min. Our study provides a new dimension for the rational design and preparation of ultrathin polyamide membranes with tunable separation properties.

中文翻译：

---

与电喷雾微滴的界面聚合：向可控和超薄聚酰胺膜。

用于海水淡化和水净化的商业聚酰胺膜由于其相对较厚的排斥层而具有低的水渗透性。我们报告了一种新型的界面聚合方法，用于合成厚度可精确控制的超薄聚酰胺层。的单体溶液米苯二胺和均苯三甲酰氯电喷雾成细小的微滴。不同单体的微滴之间的聚合反应导致精细且可控制的沉积量。我们制造了厚度从4 nm到几十纳米的光滑聚酰胺层，增长率约为1 nm / min。我们的研究为合理设计和制备具有可调分离性能的超薄聚酰胺膜提供了新的思路。