Variable Responsive Wettability Films via Electrospinning Induced by Solvents
Figure 3
Photographs of water-droplet shape on the PNIPAAm/PS composite films at 20°C and 50°C. (a), (b), and (c) correspond to films IV, V, and VI in which the solvent of precursor solution is DMF, CH2Cl2, and THF, respectively. The wettability of PNIPAAm/PS composite films prepared from different precursor solutions is completely distinct when increasing the temperature. The wettability of the PNIPAAm/PS films is both superhydrophilic and superhydrophobic and switches from superhydrophilic to superhydrophobic according to the change in the temperature when the solvents are DMF, CH2Cl2, and THF, respectively.
