| Summary: | 碩士 === 龍華科技大學 === 化工與材料工程系碩士班 === 106 === In this study, we have used Atmospheric Pressure Plasma Jet (APPJ) with rotating nozzle to expand the processing area of the carbon fiber surfaces and have made the reinforced polymer composite material test specimens from these carbon fiber for evaluation of the potential effects resulting from various combination of the process parameters, such as the distance between plasma and sample, the number of times of plasma treatment and the substrate moving speed.
In order to examine the process parametric effects on carbon fiber surface properties, we have used contact angle meter, Scanning Electron Microscopy (SEM), Energy Dispersive X-ray spectrometer (EDX) and Fourier Transform Infrared Spectrometer (FTIR) to examine respectively the test specimen's water contact angles, surface topography and oxygen-to-carbon elemental ratio under different processing parameters.
To further explore the mechanical strength of these carbon fiber reinforced polymer composites we have used universal testing machine to analyze tensile strength and flexural strength of each test specimens. We find that the tensile strength of carbon fiber treated by atmospheric pressure plasma was increased from 43.3 MPa to 56.1 MPa, and the flexural strength was increased from 101.9 MPa to 122.8 MPa.
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