Finding capabilities of 4D Printing and Characterzation of wood PLA composites

Abstract

newline The technique of 3D printing in Additive Manufacturing field has made a significant remark in newlinemodernization and growth of the Industrial revolution since 1980. In 2013, the researchers atMIT added a fourth dimension to the 3D printing technology that is time. This is achieved by using suchmaterials for 3D printed products, which show a change or transformation in in their basic configuration with respect to time as they interact with their surroundings. The transformation of the products may be driven by any one of the stimuli, i.e., heat, light, stress, pressure, water, magnetic force etc., designed in a certain fashion to get a predicted shape. This technology newlineinvolving time as the fourth dimension is named 4D printing, which is relatively new and in its growing phase. The process of 4D printing is carried out by the employment of smarts materials which exhibit various changes in their functions, such as shape and color transformation, selfassembly, self-repair etc., through some interaction mechanism based on response time of certain parameters. However, the fabrication of such materials is a different challenge. A number of newlinemanufacturing techniques have been developed to fabricate various response based smart materials.The current research focuses on the production as well as characterization of polylactic acid wood composites made through 4D printing fused filament technology. Experimental methods used to examine the impact of nanosilica as well as nanoalumina involve shape recovery, hardness as well newlineas compressive strength testing along with dynamic mechanical properties testing as well as thermo-gravimetric analysis. It has been found that increasing the nanosilica content in the Wood- PLA resulted in improvement of the physical and thermo-mechanical properties. Experimentally, adding 2% nanoalumina increased hardness, compressive strength, as well as flexural strength by 40 %, 25 %., as well as 33%, respectively. However, the addition of 2 weight percent nanosilica increased flexural...