Preparation of high-performance graphene nanoplate incorporated polyether block amide membrane and application for seawater desalination


Nigiz F.

DESALINATION, cilt.433, ss.164-171, 2018 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 433
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1016/j.desal.2017.08.025
  • Dergi Adı: DESALINATION
  • Sayfa Sayıları: ss.164-171

Özet

In this study, a novel graphene nanoplates (GNPs) incorporated polyether block amide (PEBA) membrane was successfully prepared to be used for seawater desalination. Pervaporative desalination performances were performed in a temperature range of 35-65 degrees C. Effects of GNPs content in PEBA, membrane thickness, and temperature were evaluated in terms of the flux and total salt rejection. The long-term stabilities of the membranes were experimented. Incorporating graphene nanoplate into PEBA matrix enhanced flux and ion rejections simultaneously. Experimental stability of the membrane was improved by GNPs incorporation. Graphene incorporated membranes showed excellent seawater desalination performance with the salt rejection of > 99.89% and flux of > 2.58 kg/m(2).h. Based on the flux and rejection results, optimum GNPs contents in PEBA matrix were observed as 2 wt% GNPs and 3 wt% GNPs. Increasing temperatures improved the water flux and did not significantly affect the salt rejection. The highest salt rejection was obtained as 99.94% with a flux of 2.58 kg/m(2).h at 35 degrees C when the 3 wt% GNPs incorporated membrane was used. The nanohybrid membrane preserved 99.8% of its performance during 60 h, while the rejection performance of the pristine membrane decreased to 96.8%.