公开(公告)号：US5139712A

公开(公告)日：1992-08-18

申请号：US644337

申请日：1991-01-22

申请人： Nils Hese ,  Horst Perl ,  Artur Michalski

发明人： Nils Hese ,  Horst Perl ,  Artur Michalski

IPC分类号： B01D67/00 ,  B01D71/56

CPC分类号： B01D71/56 ,  B01D67/0009 ,  B01D71/76 ,  B01D2323/12 ,  B01D71/48 ,  B01D71/60

摘要： A process for the manufacture of microfiltration membranes from aromatic polyamides, of which the pore sizes are between 0.05 and 10 .mu.m. A copolymer of isophthalic acid and m-phenylenediamine is dissolved in a solvent mixture of dimethylacetamide and dimethylformamide in the presence of alkali or alkaline earth chlorides and polyethyleneglycol. This solution is produced without the addition of water and is subsequently poured out onto a smooth surface formed of chemically inert material with the formation of the membranes. The water that is required as the precipitation agent, is only added to the poured-out solution by means of the air humidity. The relative air humidity is increased from 30% to 100% during formation of the membranes.

摘要翻译： 用于从芳族聚酰胺制造微孔膜的方法，其孔径在0.05-10μm之间。 将间苯二甲酸和间苯二胺的共聚物在碱金属或碱土金属氯化物和聚乙二醇的存在下溶于二甲基乙酰胺和二甲基甲酰胺的溶剂混合物中。 该溶液是在不添加水的情况下生产的，随后将其倒入由化学惰性材料形成的光滑表面上形成膜。 作为沉淀剂需要的水仅通过空气湿度添加到倾出的溶液中。 在膜形成过程中相对空气湿度从30％增加到100％。