Synthesis, characterization and desalination study of novel PSAB and mPSAB blend membranes with Polysulfone (PSf) was written by Padaki, Mahesh;Isloor, Arun M.;Ismail, Ahmad Fauzi;Abdullah, M. S.. And the article was included in Desalination in 2012.Synthetic Route of C7H10N2O2S This article mentions the following:
The present paper describes the synthesis of poly sulfonyl amino benzamide (PSAB) and methyalated poly sulfonyl amino benzamide (mPSAB) polymer, using terephthalic acid chloride and substituted 4-amino-1-benzensulfonmide in N-methyl-2-pyrrolidone. Polymers were characterized by FT-IR, NMR and GPC. Polysulfone composite membranes were prepared using these novel polymers by DIPS (Diffusion Induced Phase Separation) method. These composite membranes are useful for water purification with special emphasis on sea water desalination. Newly prepared membranes were studied for salt rejection, water flux, mol. weight cut off by PEG solution, effect of the pH on water swelling and salt rejection and flux decline was also studied. 30 to 70% of the salt rejection was observed in all membranes. Effect of the dilution on salt rejection was studied using different concentration of NaCl solution varying from 1000 ppm to 3500 ppm. All the membranes showed 80% rejection for PEG having 1000 Da mol. weight Contact angle and water swelling was measured to determine hydrophilicity of the membrane. Water swelling and salt rejection in different pH was also studied. In the experiment, the researchers used many compounds, for example, 4-Amino-3-methylbenzenesulfonamide (cas: 53297-70-4Synthetic Route of C7H10N2O2S).
4-Amino-3-methylbenzenesulfonamide (cas: 53297-70-4) belongs to amides. Because of the greater electronegativity of oxygen, the carbonyl (C=O) is a stronger dipole than the N–C dipole. The presence of a C=O dipole and, to a lesser extent a N–C dipole, allows amides to act as H-bond acceptors. In simple aromatic amides, fragmentation occurs on both sides of the carbonyl group. If a hydrogen is available in N-substituted aromatic amides, it tends to migrate and form an aromatic amine and the loss of a ketene.Synthetic Route of C7H10N2O2S
Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics