On the Influence of Different Loading Model and Inner Diameter to the Damping of Hollow Fibers

In this study, using the method of dry-wet phase inversion, we had spun the hollow fiber membrane with the same size as that of the spinning head successfully, by adjusting the spinning parameters(inner liquid flow; extrusion speed; revolving speed)with the different inner diameter same film thickness spinning head. The samples were tested by three different fixtures (shear, tensile, single cantilever beam) of dynamic thermal mechanical analyzer (DMA), and study the effect of inner diameter on damping capacity of hollow fiber membrane. The results show that when the film thickness is the same, the bigger the inner diameter is, the better the damping performance is (the hollow fiber membrane is naturally supported), and the results all follow this rule, indicating that hollow balloon does have additional effects to the structure damping of materials. When compare the results of different loading model for same sample, found that the damping peak appears shear > tensile > single cantilever beam, and the glass transition temperature shifted to lower temperature sequentially.