Figure 5
Absorption profiles of all samples.
The water uptake of the PEG shell is calculated as follows: 
(3); where FT and FCS are the equilibrium adsorption capacity of the composite and pristine CuSO4 nanomaterial, respectively (g/100 g), and β is the mass ratio of the CuSO4 matrix in the composite (%). Detailed results are given in (Supporting Information Table 1).
