Abstract Nowadays, ceramic membranes occupy small share in filter membranes due to their high preparation costs and complex manufacturing processes. In this account, a super-fast and one step molding method was developed for preparing alumina ultra-filtration membranes. The procedure is based on camphene freeze-casting process with airflow treatment on the surface, where a thin separation layer and its macroporous support could naturally form. The results confirmed formation of an upper separation layer due to the rapid camphene evaporation controlled by airflow treatment on its surface. The membrane optimized by calcination at 1150 °C yielded most frequent pore size of 33.0 nm, pure water flux of 458.0 L m −2 h −1 bar −1 , and bending strength of 36.5 MPa. Also, the membrane possessed high rejection rate of 99.6% towards Direct Red 80 solutions with permeate flux of 230.3 L m −2 h −1 at applied pressure of 2 bar. This method may render preparation processes simple and efficient, making it very promising for large-scale applications.

中文翻译：

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具有良好阴离子染料分离性能的氧化铝超滤膜的冻铸

摘要 目前，陶瓷膜由于制备成本高、制造工艺复杂，在过滤膜中所占的份额很小。在这个帐户中，开发了一种超快速和一步成型的方法来制备氧化铝超滤膜。该程序基于莰烯冷冻铸造工艺，表面进行气流处理，可以自然形成薄的分离层及其大孔支撑。结果证实，由于其表面上的气流处理控制了莰烯的快速蒸发，形成了上层分离层。通过在 1150°C 下煅烧优化的膜产生最常见的孔径为 33.0 nm、纯水通量为 458.0 L m -2 h -1 bar -1 和弯曲强度为 36.5 MPa。此外，该膜具有 99 的高截留率。6% 的直接红 80 溶液在 2 bar 的施加压力下具有 230.3 L m -2 h -1 的渗透通量。这种方法可以使制备过程简单高效，使其非常有利于大规模应用。