Patent
US 10,913,825Process for the preparation of graphene dispersions
CATALDI, Pietro
25 January 2018·US
Copyright © 2026 Matter42. All rights reserved.
Patent
Atlas literature
Patent
US 10,913,825Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A process for the preparation of a graphene dispersion comprising the following steps: i) providing cellulose acetate flakes or powders; ii) swelling the cellulose acetate flakes or powders in an alcohol having from 1 to 3 carbon atoms; iii) adding acetic anhydride in a concentration range from 30 to 50 wt% refe rred to the total weight of the mixture; iv) adding graphene nanoplatelets to yield a graphene dispersion. Original
A process according to claim 1, wherein the cellulose acetate of step i) has an acetylation degree of 35% to 60%. Previously presented
A process according to claim 1, wherein the alcohol of step ii) is a linear or branched alkyl alcohol. Previously presented
A process according to claim 1, wherein the alcohol of step ii) is ethyl alcohol. Previously presented
(Cu rr ently Amended) A process according to claim 1, wherein the acetic anhydride of step iii) is added in a concentration range from 1 to 8.5 wt% referred to the total weight of cellulose acetate. Currently amended
A process according to claim 1 wherein the graphene nanoplatelets of step iv) are added in a concentration range from 5 to 30 wt% referred to the cellulose acetate. Previously presented
A process for the preparation of a composite material comprising steps from i) to iv) according to claim 1 further comprising the following step: v) impregnating a porous matrix with the graphene dispersion of step iv). Previously presented
The process according to claim 1, wherein the cellulose acetate of step i) has an acetylation degree of 40%. Previously presented
The process according to claim 1 wherein the alcohol of step ii) is selected from the group consisting of methyl, ethyl, propyl, isopropyl alcohol and mixture thereof. Previously presented
. Canceled
(Cu rr ently Amended) A method for manufacturing flexible electronics with a composite material comprising a porous matrix embedded with a graphene dispersion or dried graphene nanoplatelets,, said method comprising covering said electronic with said composite material; and SVG 16318395.08-10-2020.KDOWRH₅GRXEAPX5.CLM.1.svg 0.16 2.28 Black and white Currently amended
The process according to claim 12, wherein said flexible electronics comprise flexible electrodes or high frequencies Electro Magnetic Interference shields. Previously presented
Embodiments described in the patent, grouped by the materials and process steps they use.
5 materials1 process step
Preparation of graphene dispersion using cellulose acetate swelled in ethanol, followed by acetic anhydride addition and graphene nanoplatelet incorporation; dispersion impregnated into porous cellulose network matrix, cured at temperature between 175-225°C, and wiped to yield composite material. Sheet resistance measured as function of graphene nanoplatelet wt%.
2 materials1 process step
Alternative preparation of graphene dispersion; sheet resistance of samples versus weight percentage of added graphene nanoplatelets reported in Figure 7.
Layer stacks claimed or described, ordered top of device to substrate.
graphene-cellulose composite material
flexible electronics/EMI shield
Materials described outside the worked examples.
alcohol (1-3 carbon atoms)
graphene dispersion
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Sheet resistance vs. graphene nanoplatelet wt% (Example 1) | — | graphene dispersion |
Sheet resistance variation vs. number of folding events (bending test) | — |
Patent
Atlas literature
Patent
US 10,913,825Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A process for the preparation of a graphene dispersion comprising the following steps: i) providing cellulose acetate flakes or powders; ii) swelling the cellulose acetate flakes or powders in an alcohol having from 1 to 3 carbon atoms; iii) adding acetic anhydride in a concentration range from 30 to 50 wt% refe rred to the total weight of the mixture; iv) adding graphene nanoplatelets to yield a graphene dispersion. Original
A process according to claim 1, wherein the cellulose acetate of step i) has an acetylation degree of 35% to 60%. Previously presented
A process according to claim 1, wherein the alcohol of step ii) is a linear or branched alkyl alcohol. Previously presented
A process according to claim 1, wherein the alcohol of step ii) is ethyl alcohol. Previously presented
(Cu rr ently Amended) A process according to claim 1, wherein the acetic anhydride of step iii) is added in a concentration range from 1 to 8.5 wt% referred to the total weight of cellulose acetate. Currently amended
A process according to claim 1 wherein the graphene nanoplatelets of step iv) are added in a concentration range from 5 to 30 wt% referred to the cellulose acetate. Previously presented
A process for the preparation of a composite material comprising steps from i) to iv) according to claim 1 further comprising the following step: v) impregnating a porous matrix with the graphene dispersion of step iv). Previously presented
The process according to claim 1, wherein the cellulose acetate of step i) has an acetylation degree of 40%. Previously presented
The process according to claim 1 wherein the alcohol of step ii) is selected from the group consisting of methyl, ethyl, propyl, isopropyl alcohol and mixture thereof. Previously presented
. Canceled
(Cu rr ently Amended) A method for manufacturing flexible electronics with a composite material comprising a porous matrix embedded with a graphene dispersion or dried graphene nanoplatelets,, said method comprising covering said electronic with said composite material; and SVG 16318395.08-10-2020.KDOWRH₅GRXEAPX5.CLM.1.svg 0.16 2.28 Black and white Currently amended
The process according to claim 12, wherein said flexible electronics comprise flexible electrodes or high frequencies Electro Magnetic Interference shields. Previously presented
Embodiments described in the patent, grouped by the materials and process steps they use.
5 materials1 process step
Preparation of graphene dispersion using cellulose acetate swelled in ethanol, followed by acetic anhydride addition and graphene nanoplatelet incorporation; dispersion impregnated into porous cellulose network matrix, cured at temperature between 175-225°C, and wiped to yield composite material. Sheet resistance measured as function of graphene nanoplatelet wt%.
2 materials1 process step
Alternative preparation of graphene dispersion; sheet resistance of samples versus weight percentage of added graphene nanoplatelets reported in Figure 7.
Layer stacks claimed or described, ordered top of device to substrate.
graphene-cellulose composite material
flexible electronics/EMI shield
Materials described outside the worked examples.
alcohol (1-3 carbon atoms)
graphene dispersion
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Sheet resistance vs. graphene nanoplatelet wt% (Example 1) | — | graphene dispersion |
Sheet resistance variation vs. number of folding events (bending test) | — |
Patent
Atlas literature
Patent
US 10,913,825Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A process for the preparation of a graphene dispersion comprising the following steps: i) providing cellulose acetate flakes or powders; ii) swelling the cellulose acetate flakes or powders in an alcohol having from 1 to 3 carbon atoms; iii) adding acetic anhydride in a concentration range from 30 to 50 wt% refe rred to the total weight of the mixture; iv) adding graphene nanoplatelets to yield a graphene dispersion. Original
A process according to claim 1, wherein the cellulose acetate of step i) has an acetylation degree of 35% to 60%. Previously presented
A process according to claim 1, wherein the alcohol of step ii) is a linear or branched alkyl alcohol. Previously presented
A process according to claim 1, wherein the alcohol of step ii) is ethyl alcohol. Previously presented
(Cu rr ently Amended) A process according to claim 1, wherein the acetic anhydride of step iii) is added in a concentration range from 1 to 8.5 wt% referred to the total weight of cellulose acetate. Currently amended
A process according to claim 1 wherein the graphene nanoplatelets of step iv) are added in a concentration range from 5 to 30 wt% referred to the cellulose acetate. Previously presented
A process for the preparation of a composite material comprising steps from i) to iv) according to claim 1 further comprising the following step: v) impregnating a porous matrix with the graphene dispersion of step iv). Previously presented
The process according to claim 1, wherein the cellulose acetate of step i) has an acetylation degree of 40%. Previously presented
The process according to claim 1 wherein the alcohol of step ii) is selected from the group consisting of methyl, ethyl, propyl, isopropyl alcohol and mixture thereof. Previously presented
. Canceled
(Cu rr ently Amended) A method for manufacturing flexible electronics with a composite material comprising a porous matrix embedded with a graphene dispersion or dried graphene nanoplatelets,, said method comprising covering said electronic with said composite material; and SVG 16318395.08-10-2020.KDOWRH₅GRXEAPX5.CLM.1.svg 0.16 2.28 Black and white Currently amended
The process according to claim 12, wherein said flexible electronics comprise flexible electrodes or high frequencies Electro Magnetic Interference shields. Previously presented
Embodiments described in the patent, grouped by the materials and process steps they use.
5 materials1 process step
Preparation of graphene dispersion using cellulose acetate swelled in ethanol, followed by acetic anhydride addition and graphene nanoplatelet incorporation; dispersion impregnated into porous cellulose network matrix, cured at temperature between 175-225°C, and wiped to yield composite material. Sheet resistance measured as function of graphene nanoplatelet wt%.
2 materials1 process step
Alternative preparation of graphene dispersion; sheet resistance of samples versus weight percentage of added graphene nanoplatelets reported in Figure 7.
Layer stacks claimed or described, ordered top of device to substrate.
graphene-cellulose composite material
flexible electronics/EMI shield
Materials described outside the worked examples.
alcohol (1-3 carbon atoms)
graphene dispersion
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Sheet resistance vs. graphene nanoplatelet wt% (Example 1) | — | graphene dispersion |
Sheet resistance variation vs. number of folding events (bending test) | — |
Patent
Atlas literature
Patent
US 10,913,825Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A process for the preparation of a graphene dispersion comprising the following steps: i) providing cellulose acetate flakes or powders; ii) swelling the cellulose acetate flakes or powders in an alcohol having from 1 to 3 carbon atoms; iii) adding acetic anhydride in a concentration range from 30 to 50 wt% refe rred to the total weight of the mixture; iv) adding graphene nanoplatelets to yield a graphene dispersion. Original
A process according to claim 1, wherein the cellulose acetate of step i) has an acetylation degree of 35% to 60%. Previously presented
A process according to claim 1, wherein the alcohol of step ii) is a linear or branched alkyl alcohol. Previously presented
A process according to claim 1, wherein the alcohol of step ii) is ethyl alcohol. Previously presented
(Cu rr ently Amended) A process according to claim 1, wherein the acetic anhydride of step iii) is added in a concentration range from 1 to 8.5 wt% referred to the total weight of cellulose acetate. Currently amended
A process according to claim 1 wherein the graphene nanoplatelets of step iv) are added in a concentration range from 5 to 30 wt% referred to the cellulose acetate. Previously presented
A process for the preparation of a composite material comprising steps from i) to iv) according to claim 1 further comprising the following step: v) impregnating a porous matrix with the graphene dispersion of step iv). Previously presented
The process according to claim 1, wherein the cellulose acetate of step i) has an acetylation degree of 40%. Previously presented
The process according to claim 1 wherein the alcohol of step ii) is selected from the group consisting of methyl, ethyl, propyl, isopropyl alcohol and mixture thereof. Previously presented
. Canceled
(Cu rr ently Amended) A method for manufacturing flexible electronics with a composite material comprising a porous matrix embedded with a graphene dispersion or dried graphene nanoplatelets,, said method comprising covering said electronic with said composite material; and SVG 16318395.08-10-2020.KDOWRH₅GRXEAPX5.CLM.1.svg 0.16 2.28 Black and white Currently amended
The process according to claim 12, wherein said flexible electronics comprise flexible electrodes or high frequencies Electro Magnetic Interference shields. Previously presented
Embodiments described in the patent, grouped by the materials and process steps they use.
5 materials1 process step
Preparation of graphene dispersion using cellulose acetate swelled in ethanol, followed by acetic anhydride addition and graphene nanoplatelet incorporation; dispersion impregnated into porous cellulose network matrix, cured at temperature between 175-225°C, and wiped to yield composite material. Sheet resistance measured as function of graphene nanoplatelet wt%.
2 materials1 process step
Alternative preparation of graphene dispersion; sheet resistance of samples versus weight percentage of added graphene nanoplatelets reported in Figure 7.
Layer stacks claimed or described, ordered top of device to substrate.
graphene-cellulose composite material
flexible electronics/EMI shield
Materials described outside the worked examples.
alcohol (1-3 carbon atoms)
graphene dispersion
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Sheet resistance vs. graphene nanoplatelet wt% (Example 1) | — | graphene dispersion |
Sheet resistance variation vs. number of folding events (bending test) | — |
Sheet resistance variation vs. number of abrasion cycles (abrasion test) | — | graphene dispersion |
Thickness | ≥ 5 µm | — |
Temperature | 175–225 °C | — |
Sheet resistance variation vs. number of abrasion cycles (abrasion test) | — | graphene dispersion |
Thickness | ≥ 5 µm | — |
Temperature | 175–225 °C | — |
Sheet resistance variation vs. number of abrasion cycles (abrasion test) | — | graphene dispersion |
Thickness | ≥ 5 µm | — |
Temperature | 175–225 °C | — |
Sheet resistance variation vs. number of abrasion cycles (abrasion test) | — | graphene dispersion |
Thickness | ≥ 5 µm | — |
Temperature | 175–225 °C | — |