Riaz, Fahad <br/><br/>
Effects of graphene oxide dispersions on the properties of 3D printed polymer nanocomposites / 
Fahad Riaz 
 - 70p.  Soft Copy  30cm 
<br/><br/> This study reports on the synthesis of polyethylene glycol diacrylate (PEGDA)-<br/>graphene oxide nanocomposites for 3D printing applications. PEGDA-graphene nanocomposites were synthesized by the solution casting method. Herein, we report a facile<br/>approach of probe sonication for better dispersion of graphene within the polymer matrix. Moreover, the effect of the dispersion of GO on the mechanical properties of 3D<br/>printed nanocomposites samples of tensile (ASTM D638 type IV) and compression<br/>(ASTM D695) was studied with different dispersion parameters following the Taguchibased design of experiment. Testing and microscopic analysis indicate that the optimum<br/>concentration of GO, sonication time, and sonication amplitude is (0.05%wt, 30min,<br/>70%). Tensile strength increases 60% while the compression strength increases to 62%.<br/>The young’s modulus increased from 1.47 MPa to 7.0 MPa. Both the tensile and compression strength first increase and then decrease gradually with different dispersion<br/>parameters and also decreased by increasing GO concentration. The results are further<br/>supported by microscopic analysis and tested samples. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MS Design and Manufacturing Engineering  
<br/><br/><label>Dewey Class. No.: </label>670