Full
LI Xiaojian (1995-), male, Master. E-mail: 1711790893@qq.com
Outline
An efficient and eco-friendly oil-water separation strategy is urgently needed to solve the problem of oily sewage due to the frequent occurrence of oil leakage accidents. Diatomite porous ceramics were firstly prepared by a foaming-gelcasting method, and then superhydrophilic-oleophobic diatomite porous ceramics were prepared by a simple vacuum impregnation method with the diatomite porous ceramics as a matrix and fluorine-containing polymer (Capstone FS-50) as a modifier. The effect of sintering temperature on the phase composition, microscopic morphology and physical properties of porous diatomite ceramics was investigated and the influence of CS-50 concentration on the oil contact angle and chemical stability of the surface of modified diatomite porous ceramics was also analyzed. The mesopore structure of disk-like diatomite becomes more and more blocked, the porosity of the porous samples decreases from 84.3% to 81.6% and the compressive strength increases from 0.93 MPa to 2.01 MPa as the sintering temperature increases from 1 100 to 1 200℃. The oil contact angle of the prepared modified diatomite porous ceramics firstly increases and then becomes stable with increasing Capstone FS-50 concentration. At the concentration of Capstone FS-50 of 5%, the oil contact angle of the porous ceramic is high up to 138°, and whose water contact angle is about 0°. In addition, the modified diatomite porous ceramics still maintain hydrophilic and oleophobic after soaking in acid, alkali and salt solutions, thus exhibiting superior chemical corrosion resistance.
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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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