Effect of silane KH550 on interface of basalt fibers (BFs)/poly (lactic acid) (PLA) composites

The basalt fibers/poly (lactic acid) composites, as a kind of green environment friendly materials, were prepared by vacuum perfusion method. The effect of silane coupling agent KH550 on the interface of BFs/PLA composites was analyzed. We observed the microstructure of the surface of BFs treated by silane KH550 and the interface of the composites, explored the chemical reaction among silane KH550, BFs and PLA. The silane KH550 succeeded in linking BFs and PLA and enhanced the interfacial bonding strength between BFs and PLA matrix. The crystalline properties of KH550-treated BFs/PLA composites were better than untreated BFs/PLA composites. The mechanical test suggested the silane KH550 had good effect on strengthening BFs/PLA composites.