Study of coupling agent modification of cotton stalk bast fibres reinforced polylactic acid flame-retardant composites

摘要

In this experiment, cotton stalk bast fibre was modified, respectively, with A-171, KH-550 and TC-114 coupling agent, to improve the mechanical properties of fibre board. After testing the modified fibre board for its mechanical properties and analysing coupled fibre with FT-IR, it is proved that there were some new groups introduced into the fibre. Experimental results showed that adding A-171 and KH-550 type of silane coupling agent improves the mechanics properties of the material increasingly. A-171-type silane coupling agent was better for tensile strength and bending strength of the fibre board, increased by 31 and 65%, respectively, and the notched impact strength of fibre board KH-550 silane coupling agent was larger, and could be increased by 52.2%.