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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

具有优异的化学稳定性的三维有序纳米多孔无机膜在某些领域中是令人感兴趣的，因为它们在纳米过滤、尺寸和形状选择性分离以及催化方面具有广泛的应用。溶胶-凝胶法已被广泛应用于制备纳米多孔无机膜，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，无机膜非常脆且易碎，并且它们需要更小心地处理。另外，由于无机膜的机械性能差，很难制备薄的无机膜或大的膜面积。因此，通过无机膜的传质不是很高。在这里，我们报告了一个尝试，以制造一种新型的有机-无机纳米多孔膜。我们制作了一个不对称的聚酰亚胺膜与薄的部分纳米多孔层。我们首先制备了不对称聚酰亚胺膜 ...更多信息的，包括一个无缺陷的，薄的皮肤层支撑的多孔子结构，如以前的文件中所报道的，然后，我们照射的皮肤层上的离子和处理的离子照射层与等离子体，以形成纳米孔的层。我们报告的水渗透性，蔗糖和葡萄糖的截留性能腐殖酸作为污垢剂的污垢性能，结合离子辐照和等离子体处理。我们首先制备了具有无缺陷的薄皮层的不对称聚酰亚胺膜，然后在皮层上照射离子，并通过等离子体处理离子照射层以在层中形成纳米孔。用50 keV He以1 × 1015 ions/cm 2辐照具有无缺陷表层的非对称聚酰亚胺膜，并通过Ar辉光放电处理辐照的聚酰亚胺表面。与市售的NTR 7250相比，多孔聚酰亚胺膜显示出高的水通量和优异的截留性能和耐污染性。这些发现表明，等离子体处理时间和皮层厚度有效地控制了多孔聚酰亚胺膜上形成的孔径。少