| Summary: | 博士 === 國立中正大學 === 化學工程研究所 === 108 === Functional composite materials produced from multicomponent precursor solutions have found widespread applications in our daily lives and play increasingly important role in the industrial innovations nowadays. Compared with the usual, single-component, solution systems, the utilization of a multicomponent solution can help meet various practical requirements through proper combinations of the host (functional) and guest molecules. The use of guest molecules follows two basic principles: (1) to improve the downside of the host molecules, for example, poor dispersion or processing capabilities; (2) to foster favorable (physical) interactions with the host molecule that produce synergetic effects and desirable solution properties. In general, however, it remains a challenging task to forecast optimum conditions (e.g., species, concentration, and blending ratio) that would warrant desirable solution properties and the best performance of the end product. Thus, establishing useful and generalizable guidelines in our continual search for optimized multicomponent solution systems as well as understanding the working physics is of scientific and technological importance.
In this dissertation, in-depth investigations on three distinct multicomponent solution systems are utilized to demonstrate how a comprehensive combination of rheological, optical scattering, microscopic, and dielectric characterizations can help resolve the aggregation state, host-guest molecule interactions, and eventual structure-performance relationship that, together, provide enlightening new insights into the solution optimization scheme of like materials. These studies are described in great detail in the following text under the titles of (1) aggregation properties of MEHPPV/PMMA in solution and thin film, (2) solution properties of amphiphilic polyelectrolyte in pure- and mixed-solvent media, and (3) properties of single-walled aluminosilicate nanotube/poly(vinyl alcohol) aqueous dispersions. Afterwards, future outlooks that stem from the central observations and implications of these studies are provided in the end of this dissertation.
|
|---|
