Influence of a bark-filler on the properties of PLA biocomposites

Abstract In this study, wood plastic composites (WPC) made of poly(lactic acid) PLA and a bark-filler were manufactured. Two degrees bark comminution (10–35 mesh over 35 mesh) varied content (40, 50 60%) investigated. The studied panels compared with analogically manufactured HDPE boards. manufacture involved two stages: at first, WPC granules the appropriate formulation produced using extruder (temperatures in individual sections 170–180 °C) crushing hammer mill after cooling extruded composite; secondly, obtained granulate was used to produce boards nominal dimensions 300 × 2.5 mm3 by flat pressing mold, single daylight press temperature 200 °C. study proved that comminuted can be applied as filler composites. However, an increase decreased mechanical properties (MOR, MOE) deteriorated humidity resistance (high TS WA) panels. Along content, contact angle composite surfaces decrease total surface energy noted. It also found have higher strength parameters lower moisture same content. Graphical abstract