Uporaba lesno-plastičnih kompozitov v tehnologiji 4D tiska

Three-dimensional (3D) printing with wood-plastic composites is already well known, and the use of wood in four-dimensional (4D) being increasingly explored. 4D an evolving area additive technologies where, appropriate design 3D materials, we can create products that change shape form dynamic structures when triggered externally. In printing, hygroscopicity – usually considered a disadvantage be used as positive property to their according climatic conditions, especially humidity.
 this research, FDM (fused deposition modelling) technology PLA (polylactic acid) (wood-PLA) produce specimens different material proportions, whose response changing conditions monitored. To monitor shape, or curvature, fabricated composite test using bimetal principle (actuators), which for passive layer wood-PLA active thickness ratios exposed them laboratory external conditions.
 The results showed content leads dimensional changes climate, resulting designed actuators. depends on ratio layers two-layer actuator, sorption water vapor, used.