Hello, my name is Chiaki Fujita. Because I was born in the fall, my name includes aki. I'm from Fukui and I am a graduate student of Fukui university. I am cheerful and rough character. I love sweet things, so I often go to eat ice cream and cakes with my friends. I especially like ice cream with a strawberry taste. My hobby is calligraphy. I started calligraphy since I was 6 years old, and belonged to the calligraphy club at high school and university. Calligraphy is difficult, but I glad that my skill of calligraphy improves by practicing. I have two dogs, and their name are Kokoro and Ribon. They are very cute and always make me happy. I take a walk with them near my house on holiday. I am working part-time as a cram school instructor. This work is very hard, but it is a rewarding job. I belong to analytical chemistry Laboratory now. Students belonging to this laboratory are develop new analysis methods. I plan to develop a direct analysis method of microcapsules. Microcapsules are applied in wide fields, and the evaluation methods are more important in the future. Currently, I am studying how to make microcapsules.
My research theme A microcapsule is a small container protecting encapsulated substances having a diameter of about several μm to several hundred μm. The substance contained in this container is called core substance. Depending on the material and thickness used for the wall of the container, the timing, place, and speed at which the core material is released to the external environment can be freely adjusted. Capsules are made from a number of various materials, among which polymeric materials are mainly used. Encapsulation technology has been applied to many industrial products such as protection of food ingredients, release of Flavoring agents and drugs, separation of solvents, etc. The use of microcapsules has increased in recent years. Therefore, I think that evaluation methods of microcapsules will be more important to more effectively utilize microcapsules in the future. Therefore, in this study, I analyze and evaluate microcapsules directly by Multiphoton Ionization Time-of-Flight Mass Spectrometry (MPI-TOFMS). Since MPI can selectively ionize only specific components, sample pretreatment is unnecessary. So, direct measurement is possible without changing the state of the sample. Also, TOFMS can be easily removed even if it is contaminated because it has a simple structure. Thus, samples containing microcapsules can be directly measured. I want to measure microcapsules containing fragrance components with MPI - TOFMS. I think that the results obtained by this will be one of the indicators to evaluate the strength and sustainability of scents. I intend to prepare microcapsules using interfacial polymerization method in this study. Two kinds of solutions use in the interfacial polymerization method. By contact between these two kinds of solutions, a polycondensation reaction occurs in the vicinity of the interface of the liquid phase. The polymer produced by the polycondensation reaction becomes walls. The wall film thickness of the microcapsules prepared by the interfacial polymerization method is thinner than that of the other methods. After making microcapsules, I observe with an optical microscope. After observation, measure it by introducing microcapsules into TOFMS. If this research is achieved, I think that I can contribute to research on products using microcapsules. So, I work hard on my research in the future.