3.2.7. RGO Loading

Figure 1g shows the influence of RGO loading on the swelling of GT-cl-poly(DMA) hydrogel. The rise in the amount of RGO from 0.005 g to 0.020 g was attributed to an increase in swelling percentage. This was due to an increase in hydrophilic group and surface area of GT-cl-poly(DMA) on the incorporation of RGO. Any further increase in RGO loading (> 0.020 g) was found to decrease the swelling percentage of GT-cl-poly(DMA) hydrogel. This might be attributed to the increased cross-linking density of composite hydrogel networks and the aggregations of excessive RGO in the hydrogel matrix.
