| Summary: | 碩士 === 國立臺灣師範大學 === 工業教育學系 === 101 === This study use the method of nanofluid vapor phase synthesis to make secondary particle size of copper nanofluids which is developed by our own laboratory. According to previous literature and research data, the researcher identify the impact of nano-particle size and design parameters orthogonal array. After that, the researcher uses SEM, EDS, TEM, particle size analyzer, and Optical spectrometer to analyze the morphology and composition of the experimental products. Eventually, the researcher uses Taguchi method to get the parameters of copper nanofluid optimization, and then the researcher also uses variance analysis to analysize them.
As a result, different products under different parameters lead to clusters phenomenon and the cooling process makes the particles become flake or cube-shaped, however, they all reach the nanometer-sized particles and the composition is indeed the copper. By the spectrometer, L9 gets the maximum parameters of absorption, which indicate that the experimental parameters can get the higher concentration of copper nanofluid effects. Moreover, the researcher obtains the optimal parameters for the collection of fluid temperature at room temperature, amperage 60A, pulse frequency 15Hz, reactive gas flow 1.5Lpm by the Taguchi method. Futhermore, it gets the shortest secondary particle diameter of the nanoparticles. It is about 240 nm. Finally, the reaction gas flow and amperage for the preparation of copper nanofluid are the significant factors.
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