Anisotropy Analysis of the Permeation Behavior in Carbon Dioxide-Assisted Polymer Compression Porous Products

The carbon dioxide-assisted polymer compression method is used to create porous products with laminated fiber sheets that are crimped in the presence of dioxide. In this method, fibers oriented sheet-spread direction, and intersections upper lower crimped, leading several within product. This type orientation a material anisotropic. A dye solution was injected via syringe into product made poly(ethylene terephthalate) nonwoven fabric an average diameter 8 μm. anisotropy permeation evaluated using aspect ratio vertical horizontal distances area. decreased monotonically decreasing porosity; it 2.73 for 80-ply porosity 0.63 2.33 160-ply 0.25. three-dimensional structural analysis X-ray computed tomography revealed as increased, fiber-to-fiber connection increased due increase adhesion points, resulting permeation. essential data analyzing sustained release behavior drug-loaded tablets future fabrication.