| 초록 |
At present, the reverse osmosis (RO) membrane is commercially made from polyamide (PA) and its derivative. However, there are a few limitations in permeability, durability, bio-fouling, etc. In this work, we design a new types of polyelectrolyte (PE) based RO membranes which can overcome such problems. Our approach is based on layer-by-layer (LbL) assembly method, and various PEs such as poly(allylamine hydrochloride) and several functionalized polymers. Also, we introduce carbon nanotube (CNT) to fabricate the nanocomposite membranes, which can further improve the mechanical stability of RO membrane. Layer thickness of membrane was simply controlled by deposition number and pH condition. The resulting membranes were then thermally annealed to induce the covalent crosslinking between the electrolytes. Consequently, the desalination performance of these membranes was tested using a homemade RO system operating at high pressure (~20bar) with 2000 ppm NaCl in water as a feed solution. |
