| 초록 |
Environmentally friendly waterborne polyurethane dispersions (WPUs) are widely used in many application such as biodevices, optoelectronics, coatings and adhesive due to excellent chemical resistance, water resistance and strength. WPUs can exhibit various physical properties depending on the types of the polyol, diisocyanate, and chain extender. Recently, graphene oxide (GO) was employed in many industry which is well dispersed in water and organic solvents because it has an oxygen functional group. In this study, carbonate type (C-WPU) and ether type (E-WPU) WPUs were prepared by using polycarbonate diol and poly(tetramethylene ether)glycol, and blend type (B-WPU) was made by mixing both type of WPU. The physical properties and morphology of WPU/GO nanocomposites were investigated using Thermogravimetry/Differential Thermal Analysis (TG/DTG), Dynamic mechanical analyzer (DMA), Transmission electron microscopy (TEM). |
