Filter device and analysis device using same

Patent metadata

Field	Value
Publication number	US-9533245-B2
Application number	US-201414258892-A
Country	US
Kind code	B2
Filing date	Apr 22, 2014
Priority date	Oct 25, 2011
Publication date	Jan 3, 2017
Grant date	Jan 3, 2017

Abstract

A filter device of the present disclosure includes at least a sheet-shaped fiber structure having a plurality of fibers made of amorphous silicon dioxide, wherein the plurality of fibers are tangled and thus connected together to form voids in the sheet-shaped fiber structure. A filter device of the present disclosure corresponds to an analysis device including: a substrate; a flow path formed on the substrate; and a sheet-shaped fiber structure provided on the inner wall of the flow path, wherein the sheet-shaped fiber structure includes a plurality of fibers made of amorphous silicon dioxide, and the plurality of fibers are tangled and thus connected together to form voids in the sheet-shaped fiber structure.

First claim

What is claimed is:

1. A filter device including at least a sheet-shaped fiber structure having a plurality of fibers made of amorphous silicon dioxide, wherein the plurality of fibers are tangled and thus connected together to form voids in the sheet-shaped fiber structure, and
at least a surface part of each of the fibers is doped with a nitrogen atom.

2. The filter device according to claim 1 , wherein the sheet-shaped fiber structure has connection sites formed by partially bonded fibers, and the fibers are partially bonded together at partially fused fibers.

3. The filter device according to claim 1 , wherein each of the fibers has a length of 1 μm or more and 500 μm or less.

4. The filter device according to claim 1 , wherein a maximum distance between the fibers adjacent to each other is 1 μm or more and 50 μm or less.

5. The filter device according to claim 1 , wherein each of the fibers has a diameter of 0.01 μm or more and 1 μm or less.

6. The filter device according to claim 1 , wherein each of the fibers has a surface modified with a water-repellent film.

7. The filter device according to claim 1 , wherein the concentration of the nitrogen atom dopant is the highest at the surface part and decreases as it goes to a central part of each of the fibers, and the nitrogen atom is absent at least at and near a most central part of each of the fibers.

8. An analysis device comprising:
a flow path;
a filter device provided in the flow path, wherein the filter device including at least a sheet-shaped fiber structure having a plurality of fibers made of amorphous silicon dioxide, wherein the plurality of fibers are tangled and thus connected together to form voids in the sheet-shaped fiber structure; and
a plurality of the sheet-shaped fiber structures,
wherein
the plurality of the sheet-shaped fiber structures include:
a first sheet-shaped fiber structure coated hydrophilically; and
a second sheet-shaped fiber structure coated hydrophobically, and

the first and second sheet-shaped fiber structures are alternately stacked.

9. The analysis device according to claim 8 , wherein
the sheet-shaped fiber structure has a functional group formed on a surface thereof, and
the functional group is selected from a group of an octyl group, an octadecyl group, a docosyl group, and a triacontyl group.

10. The analysis device according to claim 8 , wherein the flow path has a diameter of 10 μm to 1,000 μm.

11. The analysis device according to claim 8 , wherein the flow path has a flow inlet provided with a fluid control mechanism.

12. The analysis device according to claim 8 , wherein the flow path has an end part provided with an optical path for optical analysis.

Assignees

• Panasonic Corp

Inventors

• Nakatani Masaya
• Oka Hiroaki
• Yazbeck Daniel
• Yamamoto Takeki
• Nogami Takahiro

Classifications

• B01J20/286

  Phases chemically bonded to a substrate, e.g. to silica or to polymers · CPC title

• G01N33/491

  by separating the blood components (G01N15/05 takes precedence) · CPC title

• B01L3/5635

  connecting two containers face to face, e.g. comprising a filter · CPC title

• B01J20/283

  based on silica · CPC title

• G01N2001/4088

  filtration · CPC title