What is the effect of deep eutectic solvent (DES) viscosity on monomer diffusion and polyamide (PA) layer formation during interfacial polymerization?

Label:chem

Topic
The rate at which trimesoyl chloride (TMC) diffuses into the reaction zone at the interface is directly influenced by the viscosity of the organic solvent used. The DES system, composed of DL-menthol and lauric acid, has a higher viscosity compared to hexane.
Answer
The higher viscosity of the deep eutectic solvent (DES) system results in a slower diffusion rate for monomers compared to hexane. This slower, more controlled diffusion facilitates a more uniform and highly cross-linked polyamide (PA) layer formation during the interfacial polymerization process, leading to improved membrane performance, such as higher dye rejection.
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