In 2022,Liu, Binghui; Duan, Yuting; Li, Tingting; Li, Jialin; Zhang, Haiqiu; Zhao, Chengji published an article in Separation and Purification Technology. The title of the article was 《Nanostructured anion exchange membranes based on poly(arylene piperidinium) with bis-cation strings for diffusion dialysis in acid recovery》.Category: piperidines The author mentioned the following in the article:
A series of anion exchange membranes (AEMs) based on poly(arylene piperidinium) with bis-cation strings were prepared by a simple synthetic method for diffusion dialysis (DD). Through Menshutkin reaction, 1-(6-bromohexyl)-1-methylpiperidinium bromide was grafted onto the hydrophobic poly(arylene piperidine) backbone to produce side-chain-type AEMs with bis-piperidinium strings (QPBPipXAc). The self-assembled nanostructure of these AEMs was verified by SAXS and AFM images. The properties and DD performance of QPBPipXAc AEMs with different contents of bis-piperidinium ionic groups were systematically studied, including mech. properties, ionic conductivity, thermal stability. The prepared AEMs demonstrated favorable overall properties due to the formation of self-assembled nanostructured hydrophilic-hydrophobic phase separation morphol. The hydrophilic domains provide more efficient ion transport channels for high acid flux, whereas the hydrophobic domains restrict the AEMs swelling and Fe2+ ion transport. The prepared QPBPipXAc AEMs displayed high H+ dialysis coefficients (UH+, 10 x 10-3 – 65 x 10-3 m/h) and separation coefficients (S, 15.67-25.38). Compared with the com. membrane DF-120 (UH+ = 9 x 10-3 m/h, S = 18.5), the prepared AEMs have better diffusion dialysis performance, indicating that they could be the potential candidates for application for acid recovery. In the experimental materials used by the author, we found 1-Methyl-4-piperidone(cas: 1445-73-4Category: piperidines)
1-Methyl-4-piperidone(cas: 1445-73-4) is a member of piperidine. Piperidine is a key saturated heterocyclic scaffold found in several of the top-selling small molecule pharmaceuticals and natural alkaloids, with a diverse range of biological activities. Hence, continuous efforts have been made to develop convenient methods to prepare piperidine derivatives.Category: piperidines
Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem