Water based thermal cooling gels comprising a viscosity modifier and ice nucleating protein
Thermal cooling gel and cold packs enclosing such thermal cooling gel have an aqueous gel of 1% to 10% wt/wt of cellulose, 0.5 g/L to 2 g/L of an ice nucleating protein, and a biocide. The enthalpy of the thermal cooling gel is in a range of 250 J/g to 330 J/g.
1. A thermal cooling gel comprising:
an aqueous gel comprising 1% to 10% wt/wt of cellulose;
0.5 g/L to 2 g/L of the aqueous gel comprises an ice nucleating protein; and
a biocide;
wherein the enthalpy of the thermal cooling gel is in a range of 250 J/g to 330 J/g.
2. The thermal cooling gel of claim 1 , wherein the cellulose is selected from the group comprising sodium carboxymethylcellulose, hydroxypropyl cellulose, methylcellulose, methyl hydroxyethyl cellulose, methyl hydroxypropyl cellulose, hydroxyethyl cellulose, carboxymethyl methylcellulose, cellulose ethers, mixed cellulose ethers, and combinations thereof.
3. The thermal cooling gel of claim 2 , wherein the cellulose comprises methylcellulose.
4. The thermal cooling gel of claim 2 , wherein the cellulose comprises methyl cellulose and methyl hydroxyethyl cellulose.
5. The thermal cooling gel of claim 2 , wherein the cellulose comprises methyl cellulose, methyl hydroxyethyl cellulose, and methyl hydroxypropyl cellulose.
6. The thermal cooling gel of claim 1 , wherein the aqueous gel comprises 1% to 5% wt/wt cellulose and has an enthalpy in a range of 300 J/g to 330 J/g.
7. The thermal cooling gel of claim 6 , wherein the aqueous gel has a viscosity of 25 cps to 7,000 cps.
8. The thermal cooling gel of claim 1 , wherein the aqueous gel comprises 5% to 10% wt/wt cellulose, and has an enthalpy in a range of 250 J/g to 300 J/g.
9. The thermal cooling gel of claim 6 , wherein the aqueous gel has a viscosity of 7,000 cps to 65,000 cps.
10. The thermal cooling gel of claim 1 , wherein the ice nucleating protein is selected from the group consisting of pseudomonas syringae, pseudomonas fluorescens, Erwinaia herbicola, and combinations thereof.
11. The thermal cooling gel of claim 1 , wherein the biocide is selected from the group consisting of silver nanoparticles, an herb extract of thyme, and combinations thereof.
12. The thermal cooling gel of claim 1 , wherein the biocide is 0.001% to 1% wt/wt of the aqueous gel.
13. A cold pack comprising:
a container;
a thermal cooling gel enclosed within the container, wherein the thermal cooling gel comprises:
an aqueous gel comprising 1% to 10% wt/wt of cellulose;
0.5 g/L to 2 g/L of the aqueous gel comprises an ice nucleating protein; and
a biocide;
wherein the enthalpy of the thermal cooling gel is in the range of 250 J/g to 330 J/g.
14. The cold pack of claim 13 , wherein the container permanently encloses the thermal cooling gel.
15. The cold pack of claim 13 , wherein the container is a rigid container that retains a preselected shape and configuration.
16. The cold pack of claim 13 , wherein the container is a flexible container that is conformable to a surface against which the flexible container is seated.
17. The thermal cooling gel of claim 13 , wherein the cellulose is selected from the group comprising sodium carboxymethylcellulose, hydroxypropyl cellulose, methylcellulose, methyl hydroxyethyl cellulose, methyl hydroxypropyl cellulose, hydroxyethyl cellulose, carboxymethyl methylcellulose, cellulose ethers, mixed cellulose ethers, and combinations thereof.
18. The thermal cooling gel of claim 13 , wherein the aqueous gel comprises 1% to 5% wt/wt cellulose and has an enthalpy in a range of 300 J/g to 330 J/g and has a viscosity of 25 cps to 7,000 cps.
19. The thermal cooling gel of claim 13 , wherein the aqueous gel comprises 5% to 10% wt/wt cellulose and has an enthalpy in a range of 250 J/g to 300 J/g and has a viscosity of 7,000 cps to 65,000 cps.
20. The thermal cooling gel of claim 13 , wherein the ice nucleating protein is selected from the group consisting of pseudomonas syringae, pseudomonas fluorescens, Erwinaia herbicola, and combinations thereof.
21. The thermal cooling gel of claim 13 , wherein the biocide is selected from the group consisting of silver nanoparticles, an herb extract of thyme, and combinations thereof.
22. The thermal cooling gel of claim 13 , wherein the biocide is 0.001% to 1% wt/wt of the aqueous gel.