Basalt fiber was treated with concentration of 0. 8wt% and 1. 0wt% of KH550 silane coupling agent
respectively, and basalt fiber鄄reinforced phenolic resin (basalt fiber reinforced phenolic resin, BFR鄄phenolic) was
made. After mechanical testing and SEM analysis, we found that the mechanical properties of 0. 8wt% group was
slightly higher than 1. 0wt% group. also the resin layer of 0. 8wt% group is thick and evenly distributed,the resin atta鄄
ched to the surface of a single fiber is more than others; FTIR test had determined the formation of the new chemical
bonds may be C—N—C, C—O—Si; formation of C—N—C bond between phenol and amino on the composite inter鄄
face,and formation of C—O—Si bond between phenol and silanol. XPS tests confirmed that the 0郾8wt% group
formed more C—O—Si bonds,which made it better composite interface.