A Study of Nanosilver Colloid Prepared by EDM and its Microbial Control Benefits
| Autor: | Juei-Long Chiu, 邱瑞隆 |
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| Rok vydání: | 2016 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 104 The key points of this dissertation is to build a discharge energy and success rate monitoring system to replace the traditional oscillograph observation method and dissert the microbial control test for the nanosilver colloid. The advantage of this system is that the discharge condition can be observed instantly, in order to record experiments and optimize discharge parameter settings. The experimental results show that, in the preparation of nanosilver colloid, the cost performance is the best when the Duty Cycle (Ton-Toff) of the EDM (Electrical Discharge Machine) discharge parameters is from 10μs-100μs. In addition, the monitoring system can use the arcing rate to control the energy consumption of electrodes to standardize the product. The results show that the arcing rate, electrode weight loss, and absorption peak wavelength are very accurate. The arcing rate monitoring system is an innovative method, the EDM condition can be mastered, and the quality of a product is optimized, thus, it is an efficient instrument for process in the future. The microbial control test for the nanosilver colloid, including Penicillium, Yeast, Aspergillius niger, and Aspergillus flavus. The effectiveness is compared with the standard silver ion solution at the same concentration as the experimental process. This dissertation provides objective data as a reference frame. The nanosilver colloid, as prepared by EDM, is free of any chemical additive, and in comparison to other preparation methods, it is more applicable to biotechnology, even to the human body. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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