论文部分内容阅读
Composite polyurethane(PU)-SiO_2 hollow fiber membranes were successfully prepared via optimizing thetechnique of dry-jet wet spinning,and their pressure-responsibilities were confirmed by the relationships of pure water flux-transmembrane pressure(PWF-TP)for the first time.The origin for this phenomenon was analyzed on the basis of membranestructure and material characteristics.The effects of SiO_2 content on the structure and properties of membrane wereinvestigated.The experimental results indicated that SiO_2 in membrane created a great many interfacial micro-voids andplayed an important role in pressure-responsibility,PWF and rejection of membrane:with the increase of SiO_2 content,theability of membrane recovery weakened,PWF increased,and rejection decreased slightly.
Composite polyurethane (PU) -SiO 2 hollow fiber membranes were successfully prepared via optimizing the technology of dry-jet wet spinning, and their pressure-values were confirmed by the relationships of pure water flux-transmembrane pressure (PWF-TP) for the first time. The origin for this phenomenon was analyzed on the basis of membranestructure and material characteristics.The effects of SiO 2 content on the structure and properties of membranes were investigated. The experimental results indicated that SiO_2 in membrane created a great many interfacial micro-voids and played an important role in pressure-responsibility, PWF and rejection of membrane: with the increase of SiO 2 content, theability of membrane recovery weakened, PWF increased, and rejection decreased slightly.