以醋酸纤维素（CA）作为成膜材料,以聚酯筛网作为支撑材料,利用相转化法制备正渗透膜,考察了正渗透膜制备过程中的影响因素,包括铸膜液中聚合物浓度以及制膜过程中环境湿度、凝胶浴温度及热处理温度对正渗透膜性能（水通量和截盐率）的影响规律。并利用SEM表征了膜表面和断面的形貌。结果表明,在原料液为0.1mol/L NaCl,汲取液为4mol/L葡萄糖,原料液面向分离层,室温的测试条件下,当聚合物浓度为10.4%、在60℃下热处理、凝胶浴温度为15℃、环境湿度为90%时所制备的正渗透膜通量为9.7～10.3L/（m2.h）,截盐率在93%以上。
Forward osmosis membrane was fabricated by phase inversion method, with cellulose acetate （CA） as membrane material and polyester mesh as support. The effects of polymer content in polymer solution, humidi-ty, and the temperature of coagulate bath and annealing on the membrane performance （the water flux and the rejection for NaCI ） were investigated. The results show that the above factors play an important role on the performance of the FO membrane. When the CA concentration is 10.4%, with annealing temperature 60℃, gel bath temperature 15℃ and humidity 90%, the water flux of the fabricated FO membrane was between 9.7 and10.3L/（m2·h） and the rejection for NaCl was more than 93%, using 0. lmol/L NaCl as the feed solution and 4mol/L glucose as the draw solution.
参考文献
| [1] | He, Y.;Li, G.-M.;Wang, H.;Jiang, Z.-W.;Zhao, J.-F.;Su, H.-X.;Huang, Q.-Y. .Experimental study on the rejection of salt and dye with cellulose acetate nanofiltration membrane[J].Journal of the Taiwan Institute of Chemical Engineers,2009(3):289-295. |
| [2] | Idris A.;Ismail AF.;Noordin MY.;Shilton SJ. .Optimization of cellulose acetate hollow fiber reverse osmosis membrane production using Taguchi method[J].Journal of Membrane Science,2002(1/2):223-237. |
| [3] | 孙本惠.热力学及动力学因素对L-S相转化法制备非对称膜结构与性能的影响[J].膜科学与技术,2011(01):1-11. |
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