Abstract
Spinnerets are the heart of the entire spinning process to produce hollow fibers with desirable separation performance and properties. To produce hollow fibers with various configurations, distinct separation performance, and superior mechanical properties, spinnerets for single-layer fibers, dual-layer fibers, multibore fibers, and some other forms must be designed properly. One must take the dope reservoir inside the spinneret, the length of annular channels, and the gap distance between each flow channel into consideration when designing a spinneret because the viscous dope is subjected to various stresses that influence the microstructure and separation performance of the fibers. This chapter focuses on the spinneret design. In addition to teach the proper utilization of spinnerets for membrane fabrication, we aim to establish a fundamental understanding of the relationship among polymer structure, dope rheology, spinneret design, process conditions, phase inversion, and hollow fiber performance. An integrated knowledge in spinneret design with other physicochemical factors will not only enhance our ability to produce better hollow fibers, but also boost our capability to design novel hollow fibers from newly developed polymeric materials.
Published Version
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