| 초록 |
Poly (vinylidene fluoride) (PVDF), with the parameters: Mw is 275.000 and The solvent is N, N-dimethylacetamide (DMAC), with the parameters: mp is -20 ℃. The PVDF solutions were made with the concentrations of 10%, 13%, 15%, 20%, and 25% respectively at the temperature of 30 ℃. In this experiment using the spin coater to make the multilayer films. The procedure is: first, made a single PVDF film with the best parameters of the highest ß-phase, and then putted it into the oven for drying. After that putted the finished film on the spin coater wafer again as the substrate, putted the same solution onto it and spanned for the 2-layers PVDF film. The process parameters were all the same. And be dried again. All the multilayer films were produced by this way. In this experiment, according to the theory, made five films, they were from 1-layer film to 5-layers film respectively. The spin time was 70s; the spin rate was 1260 rpm, the dry temperature was 100 ℃, the dry time was 30 mins. |
