Full
LIU Wei (1996-), male, Master candidate. E-mail: 1716632883@qq.com
Outline
Silicon carbide (SiC) microfiltration membranes were fabricated via dip-coating on tubular SiC supports with an average pore size of 1.4 μm with SiC powder (the average particle size of 0.8 μm) as a raw material and PMAA-NH4 as a dispersant. The effects of pH value and dispersant amount on the stability of SiC suspensions, as well as the effects of sintering temperature and atmosphere (i.e., Air, Ar and N2) on the properties of SiC microfiltration membranes were investigated. The results show that the stable slurry can be obtained when pH value is 10 and PMAA-NH4 amount is 0.6% (in mass fraction). The SiC microfiltration membrane sintered in N2 at 1 200 ℃ shows the optimized performance (i.e., the average pore size of 78 nm, the membrane thickness of 10 μm and the pure water permeability of 860 L·m-2·h-1·bar-1).
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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