【摘要】 用杨梅单宁改性皮胶原纤维膜,制备出了新型膜分离材料,并研究了这种膜材料用于油水分离的效果。扫描电镜分析表明,这种膜材料呈纤维网状结构,其通道呈"之"字型,并存在大量微细短纤维束,这使乳液易于破乳而聚集。以邻苯二甲酸二丁酯为油组份,系统研究了单宁改性胶原纤维膜的油水(O/W)分离特性。结果表明:使用单层膜和多层膜对油的截留率几乎没有影响,其截留率为80%左右,但使用多层膜时膜的水通量将明显下降。油浓度升高,截留率升高,膜的水通量下降。升高pH,截留率升高,但膜的水通量下降。如果在膜的表面施加搅拌,则膜对油的截留率下降,但水通量提高。膜重复使用三次,其截留率及水通量基本不变。上述研究结果表明,单宁改性皮胶原纤维膜具有良好的油水分离性质。更多还原

【Abstract】 A novel membrane was prepared by bayberry tannin modified collagen fiber, and the separation effect of the prepared membrane for separating the oil from oil-water emulsion was studied by using the dibutyl o-phthalate as oil model. The photo of SEEM (scanning electron microscope) shows that the prepared membrane is in the form of fiber-network with zigzag pathway, and this kind of micro-fibrous structure distributes on the surface of the membrane, which benefits the breakage of emulsion. The experiments show that the retention extent of oil is about 80% no matter single membrane or multi-layer membrane is used, while the water flux reduces significantly when multi-layer membrane is used. For the prepared membrane, the retention of oil increases with the increases of oil concentration and of pH, meanwhile the water flux decreases. Comparing with static filtration, the filtration with stirring will cause the retention extent of oil to decrease and the water flux to increase. The retention extent and water flux of the prepared membrane almost keep unchanging during repeatedly using it for three times. The study shows that the novel membrane proposed has the prospects of being used for the separation of the oil from oil-water emulsion.更多还原