Approaches to prepare tfc polyamide membranes by coating diamine during, and/or post formation of asymmetric membranes and their performances

• Autor(a) principal: Joshi,R. N
• Data de Publicação: 2011
• Outros Autores: Singh,K, Bhattacharya,A
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Brazilian Journal of Chemical Engineering
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322011000300011
• topic: Membrane; Thin film composite; 1,3-phenylene diamine; Gelation bath

Thin film composite membranes were prepared by using1,3 - phenylene diamine in the gelation bath as well as in coating conditions. The cross - sectional view of the membranes shows different patterns for membranes prepared in a water - bath (Mem - I) and a diamine - containing water bath (Mem - II). The thin film composite membranes prepared using a diamine bath and coating (Mem - III) had improved salt rejecting ability but low volume flux. The performances of the salt rejection follows the order Na2SO4 > NaCl > MgSO4> MgCl2, as expected. The salt separation performances of the membranes made with higher concentration of 1,3 phenylene diamine follow the order Mem - IIIb > Mem - I > Mem - IIb. For membranes made with low concentration of 1,3 - phenylene diamine, the salt separation follows the same trend, (Mem - IIIa > Mem - IIa).