Study on property of polylactic acid/wood flour composites

Biodegradable materials,polylactic acid and old eucalyptus wood powder are used as raw material to prepare polylactic acid/wood flour composite(WF/PLA),which provide thought for wood plastic composite completely degradation.FT-IR spectrophotometer,scanning electron microscope and simultaneous thermal analyzer were employed to research the interfacial connection property,thermal properties and crystallization property,together with mechanical property was studied of WF/PLA.The results showed that:alkyl of KH-570was grafted to the WF surface;the heterogeneous nucleation crystallization and thermostability improved with the increase of filling WF.When content of wood flour was 50%,the maximum tensile strength of the composite was 29.9MPa,which was 10MPa higher than pure polylactic acid;when content of wood flour was30%,the maximum bending strength of the composite was 43.2 MPa,which was 7.3 MPa higher than pure polylactic acid.