Method for the production of high internal phase emulsion foams
US-2015353699-A1 · Dec 10, 2015 · US
Method for producing porous silk fibroin material
US9328135B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9328135-B2 |
| Application number | US-201313735975-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 7, 2013 |
| Priority date | Apr 6, 2009 |
| Publication date | May 3, 2016 |
| Grant date | May 3, 2016 |
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Abstract
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A method for producing a porous silk fibroin material, containing steps of: freezing a silk fibroin solution containing a silk fibroin aqueous solution having an aliphatic carboxylic acid added thereto; and then melting the frozen solution, thereby providing a porous material. A method for producing a porous silk fibroin material having excellent mechanical characteristics may be provided.
First claim
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The invention claimed is: 1. A method for producing a porous silk fibroin material, comprising steps of: freezing a silk fibroin solution containing a silk fibroin aqueous solution having an aliphatic carboxylic acid added thereto, without gelling the silk fibroin; and then melting the frozen solution, thereby providing a porous material. 2. The method for producing a porous silk fibroin material according to claim 1 , wherein the method further comprises a step of removing the aliphatic carboxylic acid by immersing the porous material obtained after melting in pure water, or a step of removing the aliphatic carboxylic acid by freeze-drying the porous material. 3. The method for producing a porous silk fibroin material according to claim 1 , wherein the silk fibroin solution having an aliphatic carboxylic acid added thereto is maintained in a supercooled state for a prescribed period of time before freezing. 4. The method for producing a porous silk fibroin material according to claim 1 , wherein an amount of the aliphatic carboxylic acid added is from 0.01 to 18.0% by mass in the silk fibroin solution. 5. The method for producing a porous silk fibroin material according to claim 1 , wherein a concentration of the silk fibroin is from 0.1 to 40% by mass in the silk fibroin solution having an aliphatic carboxylic acid added thereto. 6. The method for producing a porous silk fibroin material according to claim 1 , wherein the aliphatic carboxylic acid is at least one selected from the group consisting of saturated or unsaturated, monocarboxylic, dicarboxylic or tricarboxylic acids having from 1 to 6 carbon atoms. 7. The method for producing a porous silk fibroin material according to claim 6 , wherein the aliphatic carboxylic acid is at least one selected from the group consisting of formic acid, acetic acid, propionic acid, butyric acid, succinic acid, lactic acid, acrylic acid, 2-butenoic acid and 3-butenoic acid. 8. The method for producing a porous silk fibroin material according to claim 2 , wherein the silk fibroin solution having an aliphatic carboxylic acid added thereto is maintained in a supercooled state for a prescribed period of time before freezing. 9. The method for producing a porous silk fibroin material according to claim 8 , wherein the aliphatic carboxylic acid is at least one selected from the group consisting of saturated or unsaturated, monocarboxylic, dicarboxylic or tricarboxylic acids having from 1 to 6 carbon atoms. 10. The method for producing a porous silk fibroin material according to claim 8 , wherein an amount of the aliphatic carboxylic acid added is from 0.01 to 18.0% by mass in the silk fibroin solution. 11. The method for producing a porous silk fibroin material according to claim 8 , wherein a concentration of the silk fibroin is from 0.1 to 40% by mass in the silk fibroin solution having an aliphatic carboxylic acid added thereto. 12. The method for producing a porous silk fibroin material according to claim 3 , wherein the aliphatic carboxylic acid is at least one selected from the group consisting of saturated or unsaturated, monocarboxylic, dicarboxylic or tricarboxylic acids having from 1 to 6 carbon atoms. 13. The method for producing a porous silk fibroin material according to claim 3 , wherein an amount of the aliphatic carboxylic acid added is from 0.01 to 18.0% by mass in the silk fibroin solution.
Assignees
Inventors
Classifications
- C08J9/28Primary
by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum · CPC title
the liquid phase being aqueous · CPC title
Characterised by the use of proteins; Derivatives thereof · CPC title
- C07K1/02Primary
in solution {(C07K1/003, C07K1/006 take precedence)} · CPC title
- C07K14/43586Primary
from silkworms · CPC title
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- What does patent US9328135B2 cover?
- A method for producing a porous silk fibroin material, containing steps of: freezing a silk fibroin solution containing a silk fibroin aqueous solution having an aliphatic carboxylic acid added thereto; and then melting the frozen solution, thereby providing a porous material. A method for producing a porous silk fibroin material having excellent mechanical characteristics may be provided.
- Who is the assignee on this patent?
- Hitachi Chemical Co Ltd, Nat Inst Of Agrobio Sciences
- What technology area does this patent fall under?
- Primary CPC classification C08J9/28. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 03 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).