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

三维有序纳米孔有机-无机超薄膜的制备

基本信息

批准号：
17310049
负责人：
KAWAKAMI Hiroyoshi
金额：
$ 9.09万
依托单位：
Tokyo Metropolitan University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

项目摘要

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

具有出色化学稳定性的三维有序纳米多孔无机膜在某些地区引起了人们的关注，因为它们在纳米滤过，尺寸和形状选择性分离以及催化剂方面具有广泛的应用。 Sol-Gel方法已被广泛应用于制造纳米多孔的无机膜，以及氧化铝，钛，氧化锆和二氧化硅 - 已成功用于制造纳米孔无机膜。但是，无机膜非常脆和脆弱，需要更仔细的处理。此外，由于其机械性能较差，因此很难制备薄薄的无机膜或大膜区域。因此，通过无机膜的传质不是很高。在这里，我们报告了一项试验，以制造一种新型的有机无机纳米孔膜。我们用薄的部分碳化纳米孔层制造了一种不对称的聚酰亚胺膜。我们首先准备了不对称的聚酰亚胺膜……更多的是由无缺陷的，薄的皮肤层组成，由以前的论文中报道的多孔下结构支撑，然后，我们在皮肤层上辐射离子，并用等离子体处理离子辐射层的层，并在层中形成纳米的含量，我们的渗透率是渗透性的，并构成了水的特性。通过将离子辐照和血浆处理结合制成的新型多孔氟化聚酰亚胺膜的污垢。我们首先准备了具有无缺陷和薄的皮肤层的非对称聚酰亚胺膜，然后在皮肤层上照射离子，并通过血浆处理了离子辐射层以在层中形成纳米孔。在1x1015离子/cm2处用50 keV辐照具有无缺陷皮肤层的非对称聚酰亚胺膜，并通过AR Glow放电处理受照射的聚酰亚胺表面。与NTR 7250相比，多孔的聚酰亚胺膜显示出很高的水通量和出色的排斥性能和污染性，这是可商购的。这些发现表明，在多孔聚酰亚胺膜上形成的孔径由血浆处理时间和皮肤层厚度有效控制。较少的