Additive coated particles for low cost high performance materials
Existing methods of extrusion and other techniques to compound host and additives material uniformly disperse the additive in the host. This innovation uses ball milling to a coat a host particle with an additive dramatically reducing the additive required to achieve a percolative network in the host.
1. A method of making an additive-coated host particle for making a composite material, comprising:
providing a powdered host;
providing graphene oxide as a powdered additive with a softening or melting temperature higher than a melting point of the powdered host;
inputting the powdered host and the graphene oxide to a ball mill;
milling the powdered host and the graphene oxide for a milling time to sufficiently mix the powdered host and the graphene oxide but not melt the host particle to coat the powdered host with the graphene oxide; and
lowering a viscosity of the powdered host coated with the graphene oxide by dry blending a neat polymer powder with the powdered host coated with the graphene oxide.
2. The method of claim 1 , wherein the powdered host comprises a resin powder.
3. The method of claim 1 , wherein the powdered host is a powder from a metal.
4. The method of claim 1 , wherein the powdered host is a powder from a ceramic.
5. The method of claim 1 , wherein the powdered additive is a powder to alter physical properties of the powdered host, including thermal, electrical, optical or mechanical properties.
6. The method of claim 1 , wherein the milling is in a ball mill, and wherein the ball mill uses stainless steel balls weighing at least 1 g each.
7. The method of claim 1 , wherein the milling is in a closed chamber for 10 to 100 minutes at 1,000 RPM or less.
8. The method of claim 1 , wherein the milling is in a sand, bead, and horizontal mill at an rpm of 100-1000.
9. The method of claim 1 , wherein the milling is in an attrition mill that directly agitates media to achieve grinding.
10. The method of claim 1 , wherein the powdered host is a polymer, and wherein the neat polymer powder is the same polymer as the powdered host.
11. The method of claim 1 , wherein the powdered host is a polymer, and wherein the neat polymer powder is a different polymer than the powdered host.
12. The method of claim 11 , wherein the neat polymer powder is non-flowable polytetrafluoroethylene (PTFE) and the powdered host is polyvinylidene difluoride (PVDF).
13. A method of coating a host particle for making a composite material, comprising:
providing a powdered host;
providing graphene oxide as a powdered additive with a softening or melting temperature higher than a melting point of the powdered host;
inputting the powdered host and the graphene oxide into a mill to coat the powdered host with the graphene oxide;
coating the powdered host with the graphene oxide in the mill for a milling time to sufficiently mix but not melt the host particle, wherein the coating reduces the graphene oxide required to achieve a percolative network in the host; and
lowering a viscosity of the powdered host coated with the graphene oxide by dry blending a neat polymer powder with the powdered host coated with the graphene oxide.
14. The method of claim 13 , wherein the powdered host comprises a resin powder.
15. The method of claim 13 wherein the powdered host is a metal powder.
16. The method of claim 13 , wherein the powdered host is a ceramic powder.
17. The method of claim 13 , wherein the powdered additive is selected to alter at least one physical property of the powdered host selected from thermal, electrical, optical, or mechanical properties.
18. The method of claim 13 , wherein the mill is a ball mill, and wherein the ball mill uses stainless steel balls weighing at least 1 g each.
19. The method of claim 13 , wherein the milling is in a closed chamber for 10 to 100 minutes at 1,000 RPM or less.
20. The method of claim 13 , wherein the coating is in a sand, bead, and horizontal mill at an rpm of 100-1000.
21. The method of claim 13 , wherein the mill is an attrition mill that directly agitates media to achieve grinding.
22. The method of claim 13 , wherein the powdered host is a polymer, and wherein the neat polymer powder is the same polymer as the powdered host.
23. The method of claim 13 , wherein the powdered host is a polymer, and wherein the neat polymer powder is a different polymer than the powdered host.
24. The method of claim 23 , wherein the neat polymer powder is non-flowable polytetrafluoroethylene (PTFE) and the powdered host is polyvinylidene difluoride (PVDF).