Storage of corrosive materials on a fiber-based fluidic device and related methods thereof

Patent metadata

Field	Value
Publication number	US-12551885-B2
Application number	US-202117512405-A
Country	US
Kind code	B2
Filing date	Oct 27, 2021
Priority date	Oct 28, 2020
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

Abstract

A fluidic storage device capable of long-term storage of biological, chemical, and biochemical substances, including fluids and solids of a corrosive nature or generally incompatible with traditional reagent storage methods like blister packs. The fluidic device employs a fiber-based substrate which allows the substance to be stored long-term within the structure of the fiber-based substrate through capillary action. The stored substance can be released from the fiber-based substrate and used as needed as a result of active or passive forces incurred on the fluidic device. The storage as described herein will assist in minimizing the hazards associated with performing POI and POC testing by scaling down the required reagent volumes as well as facilitating long-term reagent storage and analysis on a single integrated, portable fluidic device.

First claim

What is claimed is:

1 . A fluidic device, wherein said fluidic device comprises:
a base; a chamber, which is disposed in said base; a capsule, which is disposed in said chamber; a fiber-based substrate, which is disposed in said capsule, wherein said capsule is configured to encapsulate said fiber-based substrate that is disposed in said capsule, wherein said fiber-based substrate includes individual fibers that are themselves are non-porous; said fiber-based substrate is configured to retain, receive, and/or release a substance; wherein said fiber-based substrate is configured in such a manner as to prevent the retained substance thereon from contacting other regions of said fluidic device a) outside said capsule or b) beyond the perimeter of said fiber-based substrate, during retention of said substance on said fiber-based substrate; and wherein said preventing of the retained substance by said fiber-based substrate is provided by capillary action between said non-porous fibers of said fiber-based substrate, wherein said preventing of the retained substance by said fiber-based substrate avoids unintended transfer or movement of the substance from said fiber-based substrate.

2 . The fluidic device of claim 1 , further comprising:
fluidic channels, which are disposed on said base, and wherein said base, chamber, and fluidic channels are made of a material that is incompatible with the substance intended to be retained by, received by, and/or released from said fiber-based substrate.

3 . The fluidic device of claim 2 , wherein said capsule is in fluidic communication with one or more of the following:
a sample preparation chamber disposed in said base; a liquid sample inlet disposed in said base; a vent disposed in said base; an integrated solid phase extraction (SPE) microcolumn disposed in said base; a waste chamber disposed in said base; an optofluidic valve disposed in said base; or a metering chamber disposed in said base.

4 . The fluidic device of claim 2 , wherein said capsule is in fluidic communication with one or more of the following:
a buffer inlet disposed in said base; a buffer chamber vent disposed in said base; an optofluidic valve disposed in said base; a microvent disposed in said base; a sample inlet disposed in said base; or a sample detection chamber disposed in said base.

5 . The fluidic device of claim 1 , said device further comprising:
fluidic channels, which are disposed on said base wherein said fluidic channels are configured to be in fluidic communication with said capsule in a manner to define a fluid flow path; and wherein said fiber-based substrate, disposed within said capsule, is positioned in the defined fluid flow path, wherein said fiber-based substrate is made of a material that is compatible with the substance intended to be retained by, received by, and/or released from said fiber-based substrate.

6 . The fluidic device of claim 5 , wherein said base, chamber, and fluidic channels are made of a material that is incompatible with the substance intended to be retained by, received by, and/or released from said fiber-based substrate.

7 . The fluidic device of claim 5 , wherein said capsule includes one or more ports, including a first port and/or a second port to provide for the fluidic communication with said fluidic channels.

8 . The fluidic device of claim 7 , further comprising:
a barrier disposed in said base adjacent to said first port and/or second port, wherein said barrier is made of a material that is compatible with the substance intended to be retained by, received by, and/or released from said fiber-based substrate, wherein said barrier is positioned to protect said base which is made of material that is incompatible from contact with the fluid flow path at the vicinity of the said first port and/or second port.

9 . The fluidic device of claim 8 , wherein said barrier is a vapor cover.

10 . The fluidic device of claim 8 , wherein said barrier comprises one or more of the following materials: polymer, glass, or metal.

11 . The fluidic device of claim 5 , further comprising:
a vent in fluidic communication with at least one said fluidic channel; and/or a valve in fluidic communication with at least one said fluidic channel.

12 . The fluidic device of claim 5 , wherein:
said device is configured to be subjected to an active force; and wherein any traveling of the substance on the fluid flow path is a result of the active force incurred on said device.

13 . The fluidic device of claim 12 , wherein:
said active force is a centrifugal force, wherein any traveling of the substance on the fluid flow path is a result of the centrifugal force exerted on said device as a result of said device spinning.

14 . The fluidic device of claim 12 , wherein said active force is one or more of the following:
external fluid pressure, external gas pressure, internal hydrodynamic pressure, electrokinetic, dielectrophoretic, magnetic, or optical.

15 . The fluidic device of claim 5 , wherein:
said base is configured to be subjected to a passive force; and wherein any traveling of the substance on the fluid flow path is a result of the passive force incurred on said device.

16 . The fluidic device of claim 15 , wherein said passive force includes one or more of the following: gravity or interfacial surface tension gradients.

17 . The fluidic device of claim 5 , further comprising:
a barrier disposed in said base adjacent to an area wherein said capsule establishes communication with said fluidic channels, wherein said barrier is made of a material that is compatible with the substance intended to be retained by, received by, and/or released from said fiber-based substrate, wherein said barrier is positioned to protect said base which is made of a material that is incompatible from contact with the fluid flow path at the vicinity of the communication area.

18 . The fluidic device of claim 17 , wherein said barrier is a vapor cover.

19 . The fluidic device of claim 17 , wherein said barrier comprises one or more of the following materials: polymer, glass, or metal.

20 . The fluidic device according to claim 7 , further comprising:
a plurality of said capsule; said base provides sufficient volume as to permit an arrangement of said plurality of said capsule in series disposed in said base; and individual capsules of said arrangement of said plurality of said capsule, with said fiber-based substrate disposed therein, are positioned in such a manner that said first port and said second port of said individual capsules of said arrangement of said plurality of said capsule are arranged to enable sequential fluid flow to travel through said arrangement of said plurality of said capsule within said base.

21 . The fluidic device according to claim 20 , wherein:
said arrangement includes a vertical alignment in said base or a stacking in said base.

22 . The fluidic device of claim 20 , wherein said capsule includes one of the following: container, repository, receptacle, or holder.

23 . The fluidic device of claim 1 , wherein said base includes one or more of the following:
one or more material layers, microfluidic chip, nanofluidic chip, disk, housing, container, vessel, platform, or any surface or structure that can retain, hold or house said fiber- based substrate, said chamber and said capsule.

24 . The fluidi

Assignees

• Univ Virginia Patent Foundation
• Univ Of Virgina Patent Foundation

Inventors

• Landers James P
• O'Connell Killian

Classifications

• B01L2200/0642

  Filling fluids into wells by specific techniques · CPC title

• B01L2300/0838

  Capillaries · CPC title

• B01L2200/0684

  Venting, avoiding backpressure, avoid gas bubbles · CPC title

• B01L2200/0647

  Handling flowable solids, e.g. microscopic beads, cells, particles · CPC title

• B01L2400/06

  Valves, specific forms thereof · CPC title