Characterization of amine-containing thin films prepared by continuous and pulsed plasma polymerization
| Autor: | Ching-chuan Chang, 張慶全 |
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| Rok vydání: | 2008 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 96 The goal of this research work is to prepare amine-containing polymer thin films by both continuous and pulsed plasma polymerization methods. Three monomers containing various unsaturated structures (propylamine, allylamine, propargylamine) are chosen to provide amine functionalities. The effects of operational parameters such as deposition time, applied power and duty cycle on the physical-chemical properties of polymerized thin films were evaluated by studying their chemical compositions, deposition rates, surface morphology and functionalities. For both continuous and pulsed plasma polymerizations, the deposition rates were found to be independent of deposition time and proportional to the applied power for three monomers. The surface morphology obtained by AFM showed island structures with nearly constant roughness. This indicates that the surfaces of the thin films prepared by plasma are very uniform. For lower applied power, there exist higher deposition rates for allylamine and propargylamine monomers due to the unsaturated structures. The FTIR and XPS results demonstrated that the amine functional groups have been successfully incorporated onto the thin films for three monomers. The amine derivatization experiments were used to quantify the amine functionalities. The results showed that higher amine concentration can be created at the condition of lower power for both continuous and pulsed plasma polymerization processes. For pulsed plasma polymerization processes, the deposition rate is proportional to the duty cycle. In order to examine the biocompatibility of amine-containing thin films prepared by plasma polymerizations, the cell behaviors of fibroblasts on these films were monitored. The cell morphology observed by SEM showed that the amine-containing thin films can effectively assist cell spreading. The cell viability was quantified by MTT tests and the results showed that thin films prepared by all these three monomers can enhance cell viability up to 2.3 folds comparing with the control sample. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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