A method called the precursor film firing method is proposed to improve the permeance of ceramic microfiltration membranes by avoiding intermediate layer and dip-coating process, and efficiently control the thickness of the separation layer. In this method a precursor film is prepared independently of the support by a film coating machine. This precursor film consists of two layers: Al2O3/PVA layer made of Al2O3 powder and polyvinyl alcohol (PVA), and polyvinyl butyral (PVB) layer. The precursor film is pasted on the support and fired to obtain membranes. Because the intermediate layer and dip-coating process are avoided in this method, the fabricated membranes show high permeance. For the fabricated membrane with average pore size = 0.18 μm and separation layer thickness = 10.7 μm, the permeance is 3890 L m?2 h?1 bar?1. Also the separation layer thickness can be controlled efficiently. And the precursor film can be used on fabricate curved membranes such as cylindrical membranes.
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机译：提出了一种称为前驱膜烧成法的方法，通过避免中间层和浸涂工艺来提高陶瓷微滤膜的渗透性，并有效地控制分离层的厚度。在该方法中，通过膜涂布机独立于载体制备前体膜。该前体膜由两层组成：Al 2 O 3 /由Al < sub> 2 O 3 粉末和聚乙烯醇（PVA），以及聚乙烯醇缩丁醛（PVB）层。将前体膜粘贴在载体上并烧制以获得膜。因为在该方法中避免了中间层和浸涂工艺，所以制成的膜显示出高渗透性。对于平均孔径为0.18μm，分离层厚度为10.7μm的膜，其渗透率为3890 L m ？2 h ？1 bar ？1 。另外，可以有效地控制分离层的厚度。并且该前体膜可以用于制造弯曲的膜，例如圆柱形膜。
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