Printing medium comprising aerogel materials

• US 20030181569A1
• Filed: 03/20/2003
• Published: 09/25/2003
• Est. Priority Date: 08/08/1997
• Status: Active Grant

• Current Assignee: Ruiyun Zhang, Shuang Ji, William M. Risen Jr, Xiangjun Hu
• Original Assignee: Ruiyun Zhang, Shuang Ji, William M. Risen Jr, Xiangjun Hu
• Inventors: Ji, Shuang, Risen, William M. Jr., Hu, Xiangjun, Zhang, Ruiyun
• Granted Patent: US 7,147,701 B2
• Time in Patent Office: Days
• US Class Current: 524/498
• CPC Class Codes: B01J 20/02 comprising inorganic material
• CPC Class Codes: B01J 20/0218 Compounds of Cr, Mo, W
• CPC Class Codes: B01J 20/0222 Compounds of Mn, Re
• CPC Class Codes: B01J 20/0225 Compounds of Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt
• CPC Class Codes: B01J 20/0233 Compounds of Cu, Ag, Au
• CPC Class Codes: B01J 20/0237 Compounds of Cu
• CPC Class Codes: B01J 20/0288 Halides of compounds other than those provided for in B01J20/046
• CPC Class Codes: B01J 20/0296 Nitrates of compounds other than those provided for in B01J20/04
• CPC Class Codes: B01J 20/103 comprising silica
• CPC Class Codes: B01J 20/223 containing metals, e.g. organo-metallic compounds, coordination complexes
• CPC Class Codes: B01J 20/24 Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
• CPC Class Codes: B01J 20/26 Synthetic macromolecular compounds
• CPC Class Codes: B01J 20/28042 Shaped bodies; Monolithic structures
• CPC Class Codes: B01J 20/28047 Gels
• CPC Class Codes: B01J 2220/46 Materials comprising a mixture of inorganic and organic materials materials coated or impregnated on a carrier B01J20/32
• CPC Class Codes: B01J 2220/4825 Polysaccharides or cellulose materials, e.g. starch, chitin, sawdust, wood, straw, cotton
• CPC Class Codes: B41M 5/52 Macromolecular coatings
• CPC Class Codes: B41M 5/5218 characterised by inorganic additives, e.g. pigments, clays
• CPC Class Codes: B41M 5/5236 characterised by the use of natural gums, of proteins, e.g. gelatins, or of macromolecular carbohydrates, e.g. cellulose
• CPC Class Codes: B41M 5/5245 characterised by the use of polymers containing cationic or anionic groups, e.g. mordants
• CPC Class Codes: B41M 5/529 : characterised by the use of fluorine- or silicon-containing organic compounds
• CPC Class Codes: D21H 19/40 : siliceous, e.g. clays
• CPC Class Codes: D21H 19/44 : characterised by the other ingredients, e.g. the binder or dispersing agent
• CPC Class Codes: D21H 19/52 : Cellulose; Derivatives thereof
• CPC Class Codes: Y10T 428/2982 : Particulate matter [e.g., sphere, flake, etc.]
• CPC Class Codes: Y10T 428/2993 : Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]

Abstract

New aerogels are disclosed which comprise silica, at least one organic polymer having polar functional groups, and at least one metal ion. Also disclosed are methods for making such aerogels. The present invention further concerns printable objects comprising these aerogels, specifically when the print media are imaged by the absorption of liquid and the spatial localization of pigments or dyes.

Claims

1. A medium for printing comprising silica, at least one organic polymer with a polar functional group, and at least one metal-ion-containing species, wherein the polar functional group of the organic polymer is selected from the group consisting of amine, carbonyl, acylamine, protonated amine, hydroxyl, and carboxyl groups.

2. The medium for printing of claim 1 wherein the polymer is selected from the group consisting of a chitosan with a deacylation degree 50 to 100%, pectic acid, and alginic acid.

3. The medium for printing of claim 1 wherein the metal is selected from the group consisting of Co, Cu, Fe, Cr, Ni, Mn, Rh, Ru, Ir, Pd, Pt, Yb, Er, Eu, Sm, and Dy.

4. The medium for printing of claim 1 wherein the metal is a metal ion having an oxidation state from one to six.

5. The medium for printing of claim 1 wherein the metal is a metal ion having an oxidation state from one to three.

6. The medium for printing of claim 1 wherein the metal-ion-containing species have oxidation states from zero to six.

7. The medium for printing of claim 1 in the form of a monolithic product which has at least 50% light transmission when a 0.3 mm thick sample of the material is measured at a wavelength between about 2600 and about 300 nanometers.

8. A medium for printing comprising an aerogel which comprises silica and an organic polymer with a polar functional group.

9. The medium for printing of claim 8 further comprising a metal ion containing species.

10. The medium for printing of claim 8, wherein the silica is selected from the group consisting of tetraalkoxy silanes, trialkoxyalkyl silanes, silicic acid, alkali silicates, precipitated silica, silica aerogel, alkaline earth silicates and combinations thereof.

11. A composition adapted for use as a coating for paper, the composition comprising:

silica; and

chitosan.

12. The composition of claim 11 further comprising a metal-ion-containing species.

13. The composition of claim 11 wherein the chitosan has an average molecular weight of from about 35,000 to about 3,000,000.

14. The composition of claim 13 wherein the chitosan has an average molecular weight of from about 150,000 to about 2,500,000.

15. The composition of claim 14 wherein the chitosan has an average molecular weight of from about 300,000 to about 2,100,000.

16. The composition of claim 11 wherein the chitosan has a degree of deacylation of from about 50% to about 100%.

17. The composition of claim 16 wherein the chitosan has a degree of deacylation of from about 70% to about 100%.

18. The composition of claim 17 wherein the chitosan has a degree of deacylation of from about 80% to about 100%.