Preparation of organic-inorganic ultrathin membrane with three-dimensionally ordered nanopore

具有良好化学稳定性的三维有序纳米多孔无机膜因其在纳滤、尺寸和形状选择分离以及催化等方面的广泛应用而受到人们的关注。溶胶-凝胶法已被广泛应用于纳米多孔无机膜的制备，氧化铝、二氧化钛、氧化锆和二氧化硅-氧化锆已被成功地用于制备纳米多孔无机膜。然而，无机膜非常脆和脆弱，它们需要更小心地处理。此外，由于其力学性能较差，很难制备薄的无机膜或较大的膜面积。因此，通过无机膜的传质不是很高。在这里，我们报道了一种新型的有机-无机纳米孔膜的制备。我们制备了一种具有部分碳化纳米孔层的不对称聚酰亚胺薄膜。我们首先制备了不对称聚酰亚胺膜…本文报道了一种新型的含氟聚酰亚胺多孔膜的透水性能、对蔗糖和葡萄糖的截留性能以及腐植酸对膜的污染性能。我们首先制备了无缺陷的薄皮非对称聚酰亚胺薄膜，然后将离子照射到皮肤层上，并用等离子体处理离子辐照的层，在层中形成纳米孔。用50keV的氦气以1×1015离子/cm~2的功率辐照不对称聚酰亚胺薄膜，并对辐照后的聚酰亚胺表面进行Ar辉光放电处理。与NTR 7250相比，聚酰亚胺多孔膜具有较高的水通量、优良的截留性能和耐污染性能。这些结果表明，等离子体处理时间和皮肤厚度有效地控制了多孔聚酰亚胺膜上形成的孔径。较少

Three-dimensionally ordered nanoporous inorganic membranes having excellent chemical stability are of interest in certain areas because of their wide applications for nanofiltration, size- and shape-selective separations, and catalysis. Sol-gel methods have been widely applied to fabricate nanoporous inorganic membranes, and alumina, titania, zirconia and silica- zirconia have been successfully utilized to fabricate nanoporous inorganic membranes. However, the inorganic membranes are very brittle and fragile, and they require more careful handling. Additionally, it is very difficult to prepare a thin inorganic membrane or the large membrane area due to its poor mechanical properties. Therefore, mass transfer through the inorganic membrane was not very high.Here, we report a trial to fabricate a novel organic-inorganic nanoporous membrane. We fabricated an asymmetric polyimide membrane with a thin partially carbonized nanoporous layer. We first prepared the asymmetric polyimide membrane … More s that consisted of a defect-free, thin skin layer supported by a porous substructure as reported in previous papers, and then, we irradiated ions on the skin layer and treated the ion-irradiated layer with plasma to form the nanopores in the layer.We report the water permeability, the rejection property of sucrose and glucose the fouling property of humic acid as the foulant for a novel porous fluorinated polyimide membrane made by combining the ion irradiation and plasma treatment. We first prepared the asymmetric polyimide membranes with a defect-free and thin skin layer, then we irradiated ions on the skin layer and treated the ion-irradiated layer by plasma to form nanopores in the layer. The asymmetric polyimide membranes with a defect-free skin layer were irradiated with 50 keV He at 1x1015 ions/cm2, and the irradiated polyimide surfaces were treated by Ar glow discharge. The porous polyimide membrane showed a high water flux and excellent rejection properties and fouling resistance when compared with NTR 7250, which is commercially available. These findings indicated that the pore size formed on the porous polyimide membrane was effectively controlled by the plasma treatment time and the skin layer thickness. Less