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A series of black polyimide (PI) films were prepared by using 4,4′-diaminodiphenyl ether (ODA) as diamine, pyromellitic dianhydride (PMDA) as dianhydride, and carbon black treated with different types of dispersants as shading filler, respectively, and the effects of dispersants on the surface morphology and properties of the carbon black/PI films were investigated. The results show that the dispersibility of carbon black treated with dispersants in PI matrix and the organic-inorganic interface compatibility are improved, the agglomeration degree of carbon black decreases, and the properties of the films increase. When the carbon black is treated by YK-3 (modified block polymer), the surface morphology and properties of the film are the best, its electric strength, tensile strength, and elongation at break are 145 kV/mm, 146 MPa, and 38%, respectively, and the light transmittance is close to 0.
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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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