Low cost process for manufacture of form-stable phase change material
The present technology generally relates to phase change material (PCM) pellets consisting essentially of a mixture of paraffin, a polymer, and optionally a thermal conductivity improver, a nucleating agent, an anti-oxidant, or a combination of any two or more thereof; wherein the paraffin is at least about 60 wt % of the PCM pellet; and the polymer is uncrosslinked high density polyethylene (HDPE) that has a melt flow index between about 0.1 g/10 min and about 50 g/10 min.
1. A phase change material (PCM) pellet consisting essentially of
a mixture of
paraffin,
a polymer, and
optionally a thermal conductivity improver, a nucleating agent, an anti-oxidant, or a combination of any two or more thereof;
wherein
the paraffin is at least about 60 wt % of the PCM pellet; and
the polymer is uncrosslinked high density polyethylene (HDPE) that has a melt flow index between about 0.1 g/10 min and about 50 g/10 min.
2. The PCM pellet of claim 1 , wherein the paraffin is from about 60 wt % to about 90 wt % of the PCM pellet.
3. The PCM pellet of claim 1 , wherein the uncrosslinked HDPE has a melt flow index between about 0.1 g/10 min and about 20 g/10 min.
4. The PCM pellet of claim 1 , wherein the nucleating agent is from about 0 wt % to about 10 wt % of the PCM pellet, the thermal conductivity improver is from about 0 wt % to about 2 wt % of the PCM pellet, the anti-oxidant is from about 0 wt % to about 0.1 wt % of the PCM pellet, or combinations of any two or more thereof.
5. The PCM pellet of claim 1 , wherein the mixture is a homogeneous mixture.
6. The PCM pellet of claim 1 , wherein the paraffin includes n-octadecane.
7. The PCM pellet of claim 1 , wherein the paraffin is produced by hydrodeoxygenation of lipids.
8. The PCM pellet of claim 1 , wherein the PCM pellet is between 0.1 millimeter and 5 millimeters in diameter.
9. The PCM pellet of claim 1 , wherein the PCM pellet is between 0.1 millimeter and 2 millimeters in diameter.
10. The PCM pellet of claim 1 , wherein the paraffin has a melt point between about 10° C. and about 50° C.
11. The PCM pellet of claim 1 , wherein the paraffin has a melt point between about 18° C. and about 28° C.
12. The PCM pellet of claim 1 , wherein the paraffin has a heat of fusion between 100 and 240 J/g.
13. A phase change material (PCM) pellet consisting essentially of:
a mixture of
paraffin,
a polymer, and
optionally a thermal conductivity improver, a nucleating agent, an anti-oxidant, or a combination of any two or more thereof;
wherein
the paraffin is from about 60 wt % to about 90 wt % of the PCM pellet;
the paraffin has a melt point between about 18° C. and about 28° C.; and
the polymer is uncrosslinked high density polyethylene (HDPE) that has a melt flow index between about 0.1 g/10 min and about 20 g/10 min.
14. The PCM pellet of claim 13 , wherein the nucleating agent is from about 0 wt % to about 10 wt % of the PCM pellet, the thermal conductivity improver is from about 0 wt % to about 2 wt % of the PCM pellet, the anti-oxidant is from about 0 wt % to about 0.1 wt % of the PCM pellet, or combinations of any two or more thereof.
15. The PCM pellet of claim 13 , wherein the paraffin has a heat of fusion between 100 and 240 J/g.
16. The PCM pellet of claim 13 , wherein the mixture is a homogeneous mixture.
17. The PCM pellet of claim 13 , wherein the paraffin includes n-octadecane.
18. The PCM pellet of claim 13 , wherein the paraffin is produced by hydrodeoxygenation of lipids.
19. The PCM pellet of claim 13 , wherein the PCM pellet is between 0.1 millimeter and 5 millimeters in diameter.
20. The PCM pellet of claim 13 , wherein the PCM pellet is between 0.1 millimeter and 2 millimeters in diameter.
21. A phase change material (PCM) pellet cosisting esstially of
a mixture of
paraffin,
a polymer, and
optionally a thermal conductivity improver, a nucleating agent, an anti-oxidant, or a combination of any two or more thereof
wherein
the paraffin is from 60 wt % to 90 wt % of the PCM pellet;
the paraffin has a melt point from 10° C to 50° C and a heat of fusion from 100 to 240 J/g;
the polymer is uncrosslinked high density polyethylene (HDPE) that has a melt flow index from 0.1 g/10 min to 50 g/10 min.
22. The PCM pellet of claim 21 , wherein the uncrosslinked HDPE has a melt flow index from 0.1 g/10 min to 20 g./10 min.
23. The PCM pellet of claim 21 , wherein the nucleating agent is from 0 wt% to 10 wt% of the PCM pellet, the thermal conductivity improver is from 0 wt% to 2 wt% of the PCM pellet, the anti-oxidant is from 0 wt% to 0.1 wt% of the PCM pellet, or combinations of any two or more thereof.
24. The PCM pellet of claim 21 , wherein the mixture is a homogeneous mixture and the paraffin includes n-octadecane.
25. The PCM pellet of claim 21 , wherein the PCM pellet is from 0.1 millimeter to 5 millimeters in diameter.
26. The PCM pellet of claim 21 , wherein the PCM pellet is from 0.1 millimeter to 2 millimeters in diameter.
27. The PCM pellet of claim 21 , wherein the paraffin has a melt point from 18° C. to 28° C.