Cornelis, Kjell (2022) Incorporation of terpyridine crosslinks in complex coacervate fibers. Master's Thesis / Essay, Chemistry.
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Abstract
The application of complex coacervates is promising in the production of materials. Namely, the physical properties of coacervates can easily be modified by the introduction of salt to the system. Fibers are one of the materials that can be made by complex coacervates. For better application of complex coacervates in this area, a good understanding of their behavior is required. The coacervate fibers can be strengthened by giving the system a fixed orientation so the polymer chains are aligned, which is obtained by stretching of the fibers, but this is often lost by relaxation. This alignment is theorized to be permanent by addition of crosslinks. To achieve the permanently aligned system, we functionalized the polyelectrolytes, pAA and pDMAPMAA, with terpyridines, which can form transient crosslinks by complexation with metals. By estimation of the stretchability it was observed that systems where only pAA was terpyrilated were most suited for making fibers. An increase of viscosity and work of adhesion was observed when metals were introduced to the functionalized system. Even though an increase in fiber strength was measured with tensile tests, no increased alignment of the functionalized fibers were observed with Polarized Optical Microscopy or Wide Angle X-ray Scattering after straining the fibers. The mechanism of crosslinking requires further investigation before it can be utilized optimally for fiber spinning.
| Item Type: | Thesis (Master's Thesis / Essay) |
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| Supervisor name: | Kamperman, M.M.G. and Monreal Santiago, G. and Sun, J. |
| Degree programme: | Chemistry |
| Thesis type: | Master's Thesis / Essay |
| Language: | English |
| Date Deposited: | 09 Feb 2022 10:42 |
| Last Modified: | 09 Feb 2022 10:42 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/26577 |
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