摘要：
The package comprises a functionalised graphene layer 106 between a polymeric substrate 102 and a printable substrate 104. The graphene may be functionalised or graphite flakes. The preferred polymeric substrate 102 includes alginate. The preferred printable substrate 104 comprises paper, cardboard, wood, cellulose or plastic. Production of the pack is also claimed. Preferably the polymeric substrate 102 is made by stirring 1-5 mg/ml aqueous graphene oxide dispersion, 2-4 % w/w alginate solution, 1-5 mg/ml organic compound, 20-40 % w/w inorganic nanoparticles and 5-10 % w/w polymer for 2-3 hours. The middle layer 106 is preferably made by sonicating graphene nanoparticles in an organic solvent and adding stabilising agent.
权利要求：
Claims:
1. A biodegradable packaging material (100) comprising:
an inner layer (102) comprising an enhanced polymeric substrate;
an outer layer (104) comprising a printable substrate; and
a middle layer (106), arranged between the inner layer and the outer layer, comprising at least one functionalized graphene layer,
wherein the biodegradable packaging material is suitable for an anaerobic digestion, when disposed.
2. A biodegradable packaging material (100) according to claim 1, wherein the enhanced polymeric substrate comprises an alginate enhanced using at least one of: a functionalized graphene nanoplatelets, an organic compound, an inorganic nanoparticle, and at least one polymeric substrate. 3. A biodegradable packaging material (100) according to claim 1 or 2, wherein the graphene nanoplatelets comprises at least one of: graphene, functionalized graphene, doped graphene, graphene oxide, partially reduced graphene oxide, graphite flakes.
4. A biodegradable packaging material (100) according to any of the preceding claims, wherein the inner layer (102) having a thickness ranging from 10 ym to 100 pm.
5. A biodegradable packaging material (100) according to any of the preceding claims, wherein the middle layer (106) having a thickness ranging from 10 nm to 100 nm.
6. A biodegradable packaging material (100) according to any of the preceding claims, wherein the printable substrate is at least one of: paper, cellulose, wood, cardboard, biodegradable plastic.
7. A biodegradable packaging material (100) according to any of the preceding claims, wherein the biodegradable packaging material is fabricated using a coextrusion technique, a lamination technique, a co-injection technique and a coating technique.
8. Use of the biodegradable packaging material (100) according to claim 1 to 7, as a non-food packaging or a dry-food packaging.
9. Use according to claim 8, wherein the non-food packaging or a dry-food packaging is implemented as a bag, a container, a pouch or a laminate. 10. A method for manufacturing the biodegradable packaging material (100) according to claims 1-9, the method comprising:
manufacturing an inner layer (102) comprising an enhanced polymeric substrate;
manufacturing a middle layer (106) comprising at least one functionalized graphene layer;
manufacturing an outer layer (104) comprising a printable substrate; and
assembling the inner layer, the middle layer and the outer layer such that the middle layer is arranged between the inner layer and the outer layer, wherein the biodegradable packaging material is suitable for an anaerobic digestion, when disposed.
11. A method according to claim 10, wherein the step of manufacturing the inner layer (102) comprises
obtaining a graphene oxide aqueous dispersion solution;
mixing an alginate solution and an organic compound with the graphene oxide aqueous dispersion solution;
adding an inorganic nanoparticle and at least one polymeric substrates to the functionalized alginate solution to obtain the enhanced polymeric substrate: and
stirring the enhanced polymeric substrate for around 2-3 hours. 12. A method according to claim 11, wherein a concentration of the graphene oxide aqueous dispersion solution is in a range of 1-5 mg/ml, a concentration of the organic compound is in a range of 1-5 mg/ml, a concentration of the alginate solution is in a range of 2-4 %w/w, a concentration of the inorganic nanoparticle is in a range of 20-40 %w/w of the alginate solution and a concentration of the polymeric substrates is in a range of 5-10 %w/w of the alginate solution.
13. A method according to claim 11 to 12, wherein the step of manufacturing the middle layer (106) comprises
dispersing graphene nanoplatelets in an organic solvent by sonicating for 20-40 hours; and
adding a stabilizing agent to the graphene nanoplatelets dispersion solution, and sonicating the resultant mixture for 1-2 hours to obtain a stable graphene ink dispersion.
14. A method according to claim 11 to 13, wherein the step of manufacturing the outer layer (104) comprises
obtaining a printable substrate; and
applying at least one layer of the graphene ink dispersion on the printable substrate, wherein a subsequent layer of the graphene ink dispersion is applied when a previous layer of the graphene ink dispersion is set. 15. A method according to claim 14, wherein the step of applying at least one layer of the graphene ink dispersion on the printable substrate is achieved
by any one of: brush painting, ink-jet printing, spread coating, dip-coating, vacuum filtration, or a combination thereof.
16. A method according to claim 11 to 15, wherein the step of assembling the inner layer (102), the middle layer (106) and the outer layer (104) comprises
applying the enhanced polymeric substrate on the graphene ink dispersion layered printable substrate to obtain a printed enhanced polymeric substrate film;
spraying an aqueous solution of a crosslinking agent onto the printed enhanced polymeric substrate film; and
rinsing and drying at room temperature the coated printed enhanced polymeric substrate film to obtain the biodegradable packaging material (100).
17. A method according to claim 16, wherein the step of applying the enhanced polymeric substrate on the graphene ink dispersion layered printable substrate is achieved by any one of: rod-coating, dip-coating, spin- coating, spread-coating, or a combination thereof.
18. A method according to claims 11 to 17, wherein the method comprises fabricating the biodegradable packaging material (100) using a coextrusion technique, a lamination technique, a co-injection technique and a coating technique.