Filter

Patent metadata

Field	Value
Publication number	US-10189335-B2
Application number	US-201514872631-A
Country	US
Kind code	B2
Filing date	Oct 1, 2015
Priority date	Oct 1, 2015
Publication date	Jan 29, 2019
Grant date	Jan 29, 2019

Abstract

A filtration material is disclosed that may include a first layer comprising a first three-dimensional network of fibers including a first plurality of cells, including an extracellular matrix comprising α-glucan and chitin. The filtration material may include a second layer fluidly downstream of the first layer comprising a second three-dimensional network of fibers including a second plurality of cells, including an extracellular matrix including α-glucan and chitin and the second layer may be adhered to the first layer. The first layer and the second layer may be coated with a polymer mixture including a polymer configured to mitigate exposure of the first and second three-dimensional network of fibers to glucanases and chitanases and further resist thermal degradation below a predetermined temperature. The polymer mixture may further include an antioxidant at an amount sufficient to mitigate the polymer from thermally degrading below the predetermined temperature.

First claim

What is claimed is:

1. A filtration material for filtering a contaminated air stream, comprising:
a first layer comprising a first three-dimensional network of mycelium fibers including a first plurality of cells, the first plurality of cells including an extracellular matrix comprising α-glucan and chitin, the first layer configured to preclude passage of solid materials of the contaminated air stream;
a second layer fluidly downstream of the first layer comprising a second three-dimensional network of mycelium fibers including a second plurality of cells, the second plurality of cells including an extracellular matrix including α-glucan and chitin, the second layer configured to preclude passage of solid materials of the contaminated air stream, the second layer being adhered to the first layer; and
a polymer mixture coating the first layer and the second layer, the polymer mixture including a polymer and an antioxidant, the polymer configured to mitigate exposure of the first three-dimensional network of mycelium fibers and the second three-dimensional network of mycelium fibers to glucanases and chitaneses, the polymer further configured to begin thermally degrading at or above a predetermined temperature, the antioxidant being included at an amount sufficient to mitigate the polymer from thermally degrading below the predetermined temperature.

2. The filtration material according to claim 1 , the second layer being adhered to the first layer by the α-glucan of the first plurality of cells or the second plurality of cells.

3. The filtration material according to claim 1 , wherein the first plurality of cells including an extracellular matrix comprising α-glucan and chitin includes a first plurality of mycelium cells, the first plurality of mycelium cells including an extracellular matrix comprising α-glucan and chitin.

4. The filtration material according to claim 3 , wherein the second plurality of cells including an extracellular matrix comprising α-glucan and chitin includes a second plurality of mycelium cells, the second plurality of mycelium cells including an extracellular matrix comprising α-glucan and chitin.

5. The filtration material according to claim 1 , the first layer having a first porosity and the second layer having a second porosity, and wherein the second layer is further configured to preclude passage of solid materials of a filtrate stream of the first layer.

6. The filtration material according to claim 1 , the first layer defining a first plane, the second layer defining a second plane, further including an axis of rotation extending through the first plane and the second plane, the second plane being rotated by about forty five degrees with respect to the first plane about the axis of rotation, and wherein the second layer is further configured to preclude passage of solid materials of a filtrate stream of the first layer.

7. The filtration material according to claim 1 , the contaminated air stream including a gaseous contaminant, the first layer further including an adsorbent material configured to preferentially adsorb the gaseous contaminant.

8. The filtration material according to claim 7 , the second layer further including the adsorbent material configured to preferentially adsorb the gaseous contaminant, and wherein the second layer is configured to preferentially adsorb the gaseous contaminant from a filtrate stream of the first layer.

9. A filter assembly for filtering a contaminated air stream, comprising:
a first layer of filtration material comprising a first perimeter and first three-dimensional network of mycelium fibers including a first plurality of cells, the first plurality of cells including an extracellular matrix comprising α-glucan and chitin, the first layer of filtration material configured to preclude passage of solid materials of the contaminated air stream;
a second layer of filtration material fluidly downstream of the first layer comprising a second perimeter and a second three-dimensional network of mycelium fibers including a second plurality of cells, the second plurality of cells including an extracellular matrix including α-glucan and chitin, the second layer of filtration material configured to preclude passage of solid materials of the contaminated air stream, the second layer of filtration material being adhered to the first layer of filtration material;
a frame surrounding the first perimeter and the second perimeter including a plurality of cellulosic fibers having a length to diameter ratio of at least ten to one, the frame further including a third three-dimensional network of fibers including a third plurality of cells, the third plurality of cells including an extracellular matrix comprising α-glucan and chitin, the third plurality of cells enveloping the plurality of cellulosic fibers, the frame being configured to retain the first layer of filtration material and the second layer of filtration material; and
a polymer mixture coating the first three-dimensional network of mycelium fibers, the second three-dimensional network of mycelium fibers and the third three-dimensional network of fibers, the polymer mixture including a polymer and an antioxidant, the polymer configured to mitigate exposure of the first three-dimensional network of mycelium fibers, the second three-dimensional network of mycelium fibers and the third three-dimensional network of fibers to glucanases and chitaneses, the polymer further configured to begin thermally degrading at or above a predetermined temperature, the antioxidant being included at an amount sufficient to mitigate the polymer from thermally degrading below the predetermined temperature.

10. The filter assembly according to claim 9 , the second layer of filtration material being adhered to the first layer of filtration material by the α-glucan of the first plurality of cells or the second plurality of cells.

11. The filter assembly according to claim 9 , wherein the first plurality of cells including an extracellular matrix comprising α-glucan and chitin includes a first plurality of mycelium cells, the first plurality of mycelium cells including an extracellular matrix comprising α-glucan and chitin.

12. The filter assembly according to claim 9 , wherein the second plurality of cells including an extracellular matrix comprising α-glucan and chitin includes a second plurality of mycelium cells, the second plurality of mycelium cells including an extracellular matrix comprising α-glucan and chitin.

13. The filter assembly according to claim 9 , the third three-dimensional network of fibers including a third plurality of cells, the third plurality of cells including an extracellular matrix comprising α-glucan and chitin being a third three-dimensional network of mycelium fibers including a third plurality of mycelium cells, the third plurality of mycelium cells including an extracellular matrix comprising α-glucan and chitin.

14. The filter assembly according to claim 9 , the first layer of filtration material having a first porosity and the second layer of filtration material having a second porosity, and wherein the second layer is further configured to preclude passage of solid materials of a filtrate stream of the first layer of filtration material.

15. The filter assembly according to claim 9 , the first layer of filtration material defining a first plane, the second layer of filtration material defining a second plane, further including an axis of rotation extending through the first plane and the second plane, the second plane being rotated by about forty five degrees with respect to the first plane about the axis of

Assignees

• Caterpillar Inc

Inventors

• Stonecipher Kenneth

Classifications

• B01D2239/0478

  on a layer of the filter · CPC title

• C12N1/14

  Fungi (culture of mushrooms A01G18/00; as new plants A01H15/00); Culture media therefor · CPC title

• B01D2239/065

  More than one layer present in the filtering material · CPC title

• B01D2239/0407

  comprising particulate additives, e.g. adsorbents · CPC title

• C12N13/00 Primary

  Treatment of microorganisms or enzymes with electrical or wave energy, e.g. magnetism, sonic waves · CPC title