Abstract: In this paper, low-temperature plasma was used as a method of the basalt fiber surface treatment.Low temperature plasma treatment on fiber surface properties and adsorption capacity of the coupling agent were studied and the fiber surface treatment on basalt fiber reinforced epoxy (BFRP) gluing and mechanical properties of composites were investigated. The results show that: the contact angle of basalt fiber surface with low-temperature plasma treatment decreases from 132.23° to 75.22°, which greatly improves wettability. The adsorption capacity of coupling agent of the fiber surface achieves the maximum at 10 times with low temperature plasma treatment. With the low temperature plasma treatment and coupling agent treatment, tensile properties and rapidly properties of basalt fiber reinforced epoxy resin (BFRP) composites reach maximum at 10 times, and the shear strength increases rapidly from 2 to 10 times and it becomes stable after 10 times.

Key words: basalt fiber, low-temperature plasma, adsorption amount of coupling agent, composite material, mechanical properties