摘要:
A hollow fiber membrane that is a hollow fiber type semipermeable membrane, wherein a Raman value is 70% or more, and the Raman value is a ratio of a minimum value to a maximum value of peak intensities, which are intensities of maximum peaks in each of multiple Raman spectra obtained by Raman spectroscopy at multiple points in a membrane thickness direction of a transverse cross-section of the hollow fiber membrane in a state of being swollen with water.
摘要:
In one embodiment is provided a polymer blend of poly(vinyl acetate) (PVAc) and poly(acrylic acid) (PAA), wherein the poly(vinylacetate) is present in an amount ranging between about 20 wt % and about 80 wt %, and poly(acrylic acid) is present in an amount ranging between about 80 wt % and about 20 wt %, based on the total weight of the blend. In another embodiment is provided a fiber produced from this polymer blend, and which has cells therein. In another embodiment is provided a flavorant release material comprising the porous fiber disclosed herein, and one or more flavorants disposed in a longitudinally extending core within the fiber. In another embodiment is provided a polymer fiber membrane containing a hollow, porous fiber formed from the polymer blend disclosed herein. In another embodiment is provided a filter containing the fiber described herein. In another embodiment is provided a process for producing the fibers disclosed herein by addition of the polymers to an extruder or blender, and extruding or melt spinning the mixture into a fiber containing cells therein.
摘要:
Disclosed is a charged hollow fiber membrane having hexagonal voids for use in high throughput applications. The membrane includes: (i) an inner surface; (ii) an outer surface; (iii) a porous bulk disposed therebetween, wherein the porous bulk comprises at least a first region including: a) a first set of pores having a controlled pore size and having outer rims; b) a second set of pores connecting the outer rims of the first set of pores, wherein the pore size of the first set of pores is greater than the pore size of the second set of pores; and c) a polymer matrix supporting the first set of pores; and (iv) at least one charged zone disposed on the inner surface, on the outer surface, and/or in the porous bulk hollow fiber membrane. Also disclosed is a method for preparing such hollow fiber membranes, which involves coating a filament with a coating composition that includes a membrane-forming polymer, a charged polymer, and dissolvable nanoparticles, followed by phase invention, dissolving of the nanoparticles, and removal of the filament.
摘要:
The invention resides in an apparatus for treatment of a substance. The apparatus has a substance tube for enabling a substance to be treated to pass in to the substance tube via the substance-inlet and out of the substance tube through the substance-outlet. The apparatus also has a cleaning chamber, wherein the substance tube is configured in fluid communication with the cleaning chamber to enable a substance to diffuse the permeable membrane between the substance tube and the cleaning chamber such that a substance can be substantially cleaned by a cleaner, the substance comprising blood or plasma and the cleaner comprising a cell culture. The substance tube is removably connectable with the cleaning chamber for inter-changeability or serviceability. The apparatus can further comprise a support compartment configured to connect to, or enclosing, the cleaning chamber, which functions to carry a fluid to substantially maintain the functionality of the cleaner.
摘要:
The present invention is aimed to fabricate nanoporous anodic oxide ceramic membrane tubes with excellent pore characteristics by anodizing metal tubes located in a cylindrical symmetry with respect to a cathode which itself has a cylindrical symmetry. The membrane tubes may have protruded portions acting as supports and joints. The present invention also deals with stacks and bundles consisted of numbers of the anodic oxide ceramic tubes for filter and dialysis applications.
摘要:
The present invention is aimed to fabricate nanoporous anodic oxide ceramic membrane tubes with excellent pore characteristics by anodizing metal tubes located in a cylindrical symmetry with respect to a cathode which itself has a cylindrical symmetry. The membrane tubes may have protruded portions acting as supports and joints. The present invention also deals with stacks and bundles consisted of numbers of the anodic oxide ceramic tubes for filter and dialysis applications.
摘要:
Antisolvent crystallization systems and methods are provided that employ porous hollow fiber membranes. The porous hollow fiber membrane includes a plurality of porous hollow fibers positioned within a shell, each porous hollow fiber defining a lumen side and shell side. A crystallizing solution is introduced to one side of the hollow fibers and an antisolvent is introduced to the other side of the fibers, in either cocurrent or countercurrent flow. One of the antisolvent and the crystallizing solution permeates in part through the porous hollow fiber membrane to the other side and crystals are formed thereby. Permeation of the antisolvent or the crystallizing solution establishes advantageous radial mixing that facilitates crystal formation of a desired size distribution. Downstream mixing, e.g., a completely stirred tank or a static mixer, may be employed to further improve crystallization operations.
摘要:
A dialysis membrane is made of a regenerated cellulose polymer in the form of a hollow fiber with a continuous internal cavity filled essentially with a gas. The hollow fiber has a porous inner and an outer surface. The outer surface of the hollow fiber is formed by a thin skin which has fine lengthwise grooves. The inner surface of the hollow fiber is positively modified by physical and/or chemical means.The invention also includes a method for manufacturing such a dialysis membrane.
摘要:
A hollow fibre membrane having a coiled, a hemihelix, a helical or an undulated native form, in which the membrane can be stretched by up to 4-times its original length with no plastic deformation, and wherein the native form of the membrane is produced by the asymmetric flow of liquid polymer through an opening of a die or nozzle.
摘要:
The present disclosure provides a multi-channel hollow fiber including a tubular matrix having a first end and a second end, and a plurality of channels formed through the tubular matrix and extending between the first end and the second end. The multi-channel hollow fiber of the present disclosure provides enhanced adsorption or separation efficiency for gas and liquid. Meanwhile, the content of an adsorption material in the multi-channel hollow fiber can be increased to 95 wt %, and the multi-channel hollow fiber has good mechanical strength.