| Summary: | 碩士 === 國立臺灣科技大學 === 材料科學與工程系 === 105 === In this study, a three-layer asymmetric composite fiber membrane with oil-water separation was developed. Recycle cellulose triacetate (rTAC), titanium dioxide (TiO2) and graphene oxide had been used. The experiment was divided into three parts. First, TiO2 was prepared and confirmed to be anatase by XRD. rTAC was electrospun onto a commercially available nonwoven substrate. Nonwovens mainly increase the strength and support of the filter. rTAC provides the pore so that the filtrate can pass smoothly. The second part is the electrophoretic deposition of GO , not only introduce the hydrophilic function on the rTAC to achieve the hydrophilic effect, but also increase the rTAC flattening, which will make electrophoretic deposition of TiO2 more easily. When the titanium dioxide is irradiated with violet light, it will be defeat on TiO2 surface. which can be introduce water vapor so that the contact angle is reduced to 5 degrees or less, and the hydrophilicity of the hydrophilic layer is more effectively promoted. The third part of the experiment is oil and water separation experiment, when the oil and water emulsion through the three layers of asymmetric composite fiber membrane, the first layer of hydrophilic layer can effectively block the oil, the second layer of hydrophobic fiber network can increase the speed of filtrate flow, Increase the water flux of oil and water emulsion. And the permeate carbon concentration in the water was analyzed using a total organic carbon analyzer (TOC). In this study, a three-layer asymmetric composite fiber membrane with oil-water separation was developed. Recycle cellulose triacetate (rTAC), titanium dioxide (TiO2) and graphene oxide had been used. The experiment was divided into three parts. First, TiO2 was prepared and confirmed to be anatase by XRD. rTAC was electrospun onto a commercially available nonwoven substrate. Nonwovens mainly increase the strength and support of the filter. rTAC provides the pore so that the filtrate can pass smoothly. The second part is the electrophoretic deposition of GO , not only introduce the hydrophilic function on the rTAC to achieve the hydrophilic effect, but also increase the rTAC flattening, which will make electrophoretic deposition of TiO2 more easily. When the titanium dioxide is irradiated with violet light, it will be defeat on TiO2 surface. which can be introduce water vapor so that the contact angle is reduced to 5 degrees or less, and the hydrophilicity of the hydrophilic layer is more effectively promoted. The third part of the experiment is oil and water separation experiment, when the oil and water emulsion through the three layers of asymmetric composite fiber membrane, the first layer of hydrophilic layer can effectively block the oil, the second layer of hydrophobic fiber network can increase the speed of filtrate flow, Increase the water flux of oil and water emulsion. And the permeate carbon concentration in the water was analyzed using a total organic carbon analyzer (TOC).
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