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A new type of ceramifiable intumescent fire protection coating was prepared by using epoxy resin as the matrix, ammonium polyphosphate as the flame retardant, zinc borate as the flux, and raw vermiculite powder and wollastonite as the refractory fillers. The effects of the compound of four fillers on the properties of ceramifiable intumescent fire protection coating were studied by scanning electron microscope (SEM) and fire resistance test. The results show that ammonium polyphosphate can significantly improve the expansion multiplication rate and thermal insulation performance, zinc borate can effectively enhance the strength and density of the charcoal layer, and raw vermiculite powder and wollastonite can enhance the burn-resistant performance of the charcoal layer and increase the fire resistance time limit at high temperature. When the mass ratio of ammonium polyphosphate, raw vermiculite, zinc borate, and wollastonite is 11∶5∶6∶10, the tensile shear strength is 7.8 MPa, the refractory performance is the best, the fire resistance time limit reaches 10 min, the maximum backsheet temperature is 393℃, and the charcoal layer after burning can withstand a voltage of 1.0 kV.
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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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