阻隔法制备高渗透通量陶瓷微滤膜

Preparation of High Permeability Ceramic Microfiltration Membrane with Blocking Method

利用阻隔法制备了无中间过渡层的高渗透通量氧化铝微滤膜。在大孔氧化铝支撑体表面包覆一层PVB薄膜,再通过浸渍涂膜法在PVB薄膜上包覆一层氧化铝膜前驱体,经过煅烧后,PVB薄膜被氧化分解,在支撑体表面形成了无中间过渡层的氧化铝微滤膜。该氧化铝膜的平均孔径为0.26μm,纯水通量为(1468±81)L·m^(-2)·h^(-1)·bar^(-1),显著高于其他工艺所制备的陶瓷膜。氧化铝微滤膜的高纯水通量主要得益于陶瓷膜没有中间过渡层的存在,支撑体大孔较少被成膜颗粒堵塞,过滤阻力显著减小。

High permeability ceramic microfiltration membranes without intermediate buffer layer were prepared by using a blocking method.Al_(2)O_(3) support with large pores was coated with a PVB film,on top of which Al_(2)O_(3) precursor was coated.After calcination,the PVB film was decomposed,thus leaving Al_(2)O_(3) membranes without intermediate layers.The membranes had an average pore size of 0.26μm and pure water permeance of(1468±81)L·m^(-2)·h^(-1)·bar^(-1).The high water permeability is attributed to the absence of intermediate layers and reduced blocking effect particles.