Abstract
Separation performance of polyamide composite membranes is affected by several parameters during formation of thin upper layer via interfacial polymerization. We investigated the effect of various polyamide synthesis conditions on the performance of organic solvent resistant polyamide composite membranes through the model equations designed by 2-level fractional factorial design. The dewaxing solvent recovery was selected as separation process. Five factors were changed in two level includin; TMC concentration (0.05–0.1%), MPD concentration (1–2%), support immersion time in organic solution (2–4 min), support immersion time in aqueous solution (1–2 min), and curing temperature (70–80 °C). The resultant equations showed 93.48% and 94.82% of the variability (R 2 adj ) in data used to fit oil rejection and permeate flux models, respectively. The analysis of variance revealed that both models were high significant. It was also observed that TMC concentration, MPD concentration and immersion time in TMC have more pronounced effect on the oil rejection and permeate flux than other factors and interactions. Optimal polyamide preparation conditions were obtained using multiple response method for 94% oil rejection as target value. According to the results, the best value of permeate flux (8.86 l/(m2·h)) was found at TMC concentration of 0.1%, MPD concentration of 1.94%, immersion time in TMC of 3.88 min, immersion time in MPD of 1.95 min and curing temperature of 71.96 °C with desirability factor of 1.
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Namvar-Mahboub, M., Pakizeh, M. Optimization of preparation conditions of polyamide thin film composite membrane for organic solvent nanofiltration. Korean J. Chem. Eng. 31, 327–337 (2014). https://doi.org/10.1007/s11814-013-0213-6
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DOI: https://doi.org/10.1007/s11814-013-0213-6