| abstract |
Various hollow structures with unique shapes have been produced by rotational spinning technology. When the mold was rotated around one of its axes, a soluble solution or emulsion phase separation was induced in the filled mold. The difference in density between the phases resulted in settling in the inner lumen of the mold under centrifugal force. After or during settling, gelation of the phase separated particles fixes the morphology of the hollow structure and the solvent remains in the center of the mold. The solvent is removed from the mold to obtain a coating or tube. By controlling the rotation speed and compounding chemicals, the tube dimensions and wall morphology can be manipulated. This technology provides a new means for the production of polymer tubes. It requires only a small amount of starting material, allows tube multilayering, is applicable to a variety of polymers, and can obtain highly diffusive hollow structures while maintaining good mechanical strength. |