期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 2, 期 36, 页码 15124-15131出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta01770f
关键词
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资金
- Key Projects in the Science & Technology Pillar Program of China [2011BAZ02490]
- Natural Science Foundation of Shandong Province [ZR2011BZ002]
Novel self-standing gamma-alumina fibrous membranes with good flexibility have been successfully fabricated for the first time using an electrospinning technique. The gamma-alumina membranes were composed of randomly arranged nanofibers with a high aspect ratio and small diameter (ca. 230 nm). The gamma-alumina membranes show high tensile strength (2.98 MPa) and thermal stability (up to 900 degrees C), which favor their applications in high temperature conditions. Furthermore, the gamma-alumina membranes exhibit good filtration performance for 300 nm dioctyl phthalate fine particulate gas filtration. The filtration efficiency is 99.848% and the pressure drop is 239.12 Pa for the membrane calcined at 700 degrees C with a basis weight of 9.28 g m(-2); and the filtration efficiency could be over 99.97% when the basis weight is over 11.36 g m(-2), suggesting that the gamma-alumina fibrous membrane is a promising candidate for high temperature, fine particulate filtration applications. This work also provides a novel insight into the electrospinning of flexible self-standing inorganic membranes for applications in the separations field.
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