Porous fiber and adsorption column

Patent metadata

Field	Value
Publication number	US-2020376465-A1
Application number	US-201816496633-A
Country	US
Kind code	A1
Filing date	Mar 23, 2018
Priority date	Apr 4, 2017
Publication date	Dec 3, 2020
Grant date	—

Abstract

The present invention provides: a porous fiber that exhibits both improved adsorption capacity, and suppressed exposure and detachment of particulates; an adsorption column filled with said porous fiber; and a blood purification system in which an adsorption column is connected to a water removal column. The porous fiber according to the present invention has a three-dimensional pore structure formed by a solid fiber, and satisfies all of the following conditions. (1) The porous fiber has particulates having a diameter of not more than 200 μm, and the percentage of area occupied by said particulates having a diameter of not more than 200 μm in a horizontal cross section of the three-dimensional pore structure is at least 3.0%. (2) The porous fiber does not contain said particulates having a diameter of not more than 200 μm in the region within 1.0 μm in the depth direction from the outermost surface.

First claim

1 . A porous fiber, comprising a three-dimensional pore structure formed by a fiber having a solid shape, wherein
the porous fiber satisfies all requirements below: (1) having a granular material having a particle diameter of 200 μm or less, and having an area occupancy rate of the granular material having a particle diameter of 200 μm or less, in a cross section of the three-dimensional pore structure, of 3.0% or more; and (2) not having the granular material having a particle diameter of 200 μm or less in a region within 1.0 μm in a depth direction from an outermost surface.

2 . The porous fiber according to claim 1 , wherein the three-dimensional pore structure has an average radius of pores in a range of 0.5 nm or more and 100 nm or less.

3 . The porous fiber according to claim 1 , having a surface porosity in a range of 0.5% or more and 30.0% or less.

4 . The porous fiber according to claim 1 , wherein the three-dimensional pore structure has a specific surface area of pores of 10 m 2 /g or more.

5 . The porous fiber according to claim 1 , having a core-sheath structure or a sea-island structure.

6 . The porous fiber according to claim 1 , wherein the fiber having a solid shape has a yarn diameter in a range of 20 μm or more and 1000 μm or less.

7 . The porous fiber according to claim 1 , wherein the granular material is inorganic particles.

8 . The porous fiber according to claim 1 , wherein the granular material includes at least one selected from the group consisting of active carbon, carbon nanotube, graphene, graphite, and graphene oxide.

9 . The porous fiber according to claim 1 , wherein the granular material selectively adsorbs a low molecular weight compound having a molecular weight of less than 1000 .

10 . The porous fiber according to claim 1 , wherein the granular material is inorganic particles and has phosphorus adsorption capability.

11 . The porous fiber according to claim 1 , wherein a pore in the three-dimensional pore structure selectively adsorbs a high molecular weight compound having a molecular weight of 1000 or more.

12 . The porous fiber according to claim 1 , comprising polymethyl methacrylate.

13 . The porous fiber according to claim 1 , having a pH change of −1 or more and +1 or less.

14 . The porous fiber according to claim 1 , which is used for medical use.

15 . An adsorption column, comprising the porous fiber according to claim 1 packed into the adsorption column.

16 . A blood purification system, comprising:
the adsorption column according to claim 15 ; and a water removal column, wherein the adsorption column and the water removal column are connected.

Assignees

• Toray Industries

Inventors

• Han Aishan
• Fujieda Hiroaki
• Ueno Yoshiyuki

Classifications

• D01F8/10

  with at least one other macromolecular compound obtained by reactions only involving carbon-to-carbon unsaturated bonds as constituent · CPC title

• C01G23/047

  Titanium dioxide · CPC title

• D01F6/52 Primary

  of polymers of unsaturated carboxylic acids or unsaturated esters · CPC title

• B01D15/00

  Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor · CPC title

• D01F1/10

  Other agents for modifying properties · CPC title