Preparation and Application of Microporous TPX Composite Membranes

• Main Authors: Yung-Hsin Lee, 李雍信
• Other Authors: Da-Ming Wang
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/23151283281301803145

碩士 === 國立臺灣大學 === 化學工程學研究所 === 92 === Poly(4-methyl-1-pentene) (TPX) composite membranes for the application of osmotic distillation are prepared in this study. Due to the weak mechanical strength, the preparation and application of the TPX hydrophobic particulate membranes prepared by wet-phase inversion are restricted. The TPX composite membranes are prepared by medium molecular weight TPX and filter paper. The results show that the mechanical strength can be improved successfully. However, the flux of TPX composite membranes is smaller than that of TPX particulate membranes. It shows that the porosity of the substrate is the main factors about the flux. The TPX composite membranes are also compared with commercial PTFE membranes in the application of osmotic distillation. The results show that the fluxes of prepared membranes and commercial PTFE membranes are fairly identical. Finally, comparison between the dead-end filtration by using commercial membranes and the osmotic distillation by using TPX prepared composite membranes was investigated. The results show that the fluxes or retentions of osmotic distillation are better. Because there is no fouling in osmotic distillation, the flux is almost constant.