Fibrous porous ceramics with devisable phenolic resin reinforcing layer

Fibrous porous ceramics with devisable phenolic resin reinforcing layer were fabricated using low cost atmospheric impregnation technology at room temperature. In combination with additional sealing method, phenolic resin reinforcing layer with controllable thickness could be obtained on the surface of fibrous porous ceramics. Typical gradient profile was observed along the thickness direction of impregnation. The effects of the phenolic resin reinforcing layer on mechanical properties and thermal insulation properties were studied. The results revealed that compressive strength increased from 1.70 MPa to 2.61 MPa, tensile strength increased from 0.78 MPa to 0.91 MPa, and flexural strength increased from 9.55 MPa to 10.89 MPa with the phenolic resin layer increasing from 0 mm to 9 mm. Simultaneously, room-temperature thermal conductivity increased from 0.051 W/(m·K) to 0.055 W/(m·K). In addition, the impact resistance of the surface of the material was obviously improved. The contact angel of the surface of the material exceeded 125°, which effectively improved the environmental adaptability.