COMPOSITES COMPRISING POLYMER AND MESOPOROUS SILICATE

• US 20100029832A1
• Filed: 01/07/2008
• Published: 02/04/2010
• Est. Priority Date: 01/05/2007
• Status: Abandoned Application

• Current Assignee: The Board of Trustees of Michigan State University (Michigan State University)
• Original Assignee: The Board of Trustees of Michigan State University (Michigan State University)
• Inventors: Park, In, Xue, Siqi, Pinnavaia, Thomas J.
• Application Number:
  US12/520,960
• Publication Number:
  US 20100029832A1
• Time in Patent Office: Days
• US Class Current: 524/493
• CPC Class Codes: C08K 3/013 Fillers, pigments or reinforcing additives
• CPC Class Codes: C08K 3/34 Silicon-containing compounds
• CPC Class Codes: C08K 3/346 Clay
• CPC Class Codes: C08K 3/36 Silica
• CPC Class Codes: C08K 7/26 Silicon- containing compounds

Abstract

Surfactant-templated mesoporous silicates and mesoporous layered silicate clays having certain porosity parameters are used as reinforcing agents for polymers to make composites. The combination of porosity parameters that allows mesoporous silicates to be competitive with organoclays for the reinforcement of engineering polymers include an average mesopore size of at least 4 nm for surfactant-templated mesoporous silicates and least 2 nm for mesoporous layered silicate clays.

Claims

1. A composite composition comprising an organic engineering polymer and a mesoporous silicate, wherein the mass ratio of polymer to silicate is between about 99:

1 and about 50;

50, and wherein the mesoporous silicate has a surface area of at least 400 meters square per gram, an average mesopore diameter of at least 4 nanometers, and a pore volume of at least 1.0 cubic centimeters per gram, wherein at least 20% of the total pore volume is due to the presence of mesopores 2 to 50 nm in size, wherein the mesoporous silicate is selected from a surfactant templated mesoporous silicate having an average pore diameter of 4 nm or greater and a mesoporous silicate clay having an average pore diameter of 2 nm or greater.

2. A composite according to claim 1, wherein the mesoporous silicate comprises an ordered surfactant-templated mesoporous silicate, a disordered surfactant-templated mesoporous silicate, or a mesoporous layered silicate clay.

3. A composite according to claim 2, wherein the mesoporous silicate is a smectite clay wherein the aggregation of nanolayers is disordered in edge-to-face fashion and lacking ordered face-to-face nanolayers stacking.

4. A composite according to claim 3, wherein inorganic exchange cations on the smectite layers are replaced by organic onium ions.

6. The composite composition of claim 1 wherein the mesoporous silicate is mesostructured.

7. The composite composition of claim 1 wherein the mesoporous silicate is a mesocellular foam structure.

8. The composition of claim 1 wherein the mesoporous silicate is a layered structure.

9. The composition of claim 1 wherein the mesoporous silicate is atomically ordered.

10. The composition of claim 2 wherein the engineering polymer is a thermoplastic polymer.

11. The composition of claim 2 wherein the engineering polymer is a thermoset polymer.

12. The composition of any of claim 1, wherein the surface area is from 400 to 1500 m²/g, the average mesopore diameter is from 4 to 50 nm, and the pore volume is from 1 to 3.5 cm³/g.

13. A method for forming a composite according to claim 1 wherein the polymer is a thermoset polymer, the method comprising:

a) mixing a pre-polymer with the mesoporous silicate, optionally in the presence of a solvent or a dispersing agent to facilitate dispersion,

b) allowing the optional solvent to evaporate, and

c) curing the pre-polymer and mesoporous silicate mixture to form the composite composition.

14. A method for forming a composite according to claim 1 wherein the polymer is a thermoplastic polymer, the method comprising melt blending the polymer and mesoporous silicate.

5. (canceled)

15. A composite composition comprising an engineering polymer and a mesoporous silicate, wherein the mass ratio of polymer to silicate is between about 99:

1 and about 50;

50, and wherein the mesoporous silicate has a surface area of at least 400 meters square per gram, an average mesopore diameter of at least 4 nanometers, and a pore volume of at least 1.0 cubic centimeters per gram, wherein at least 20% of the total pore volume is due to the presence of mesopores 2 to 50 nm in size, wherein the mesoporous silicate comprises an ordered surfactant-templated mesoporous silicate.

16. A composite according to claim 15, wherein the surface area is from 400 to 1500 m²/g, the pore diameter is from 4 to 50 nm, and the pore volume is from 1 to 3.5 cm³/g.

17. A composite according to claim 15, comprising 0.1-12% by weight of the mesoporous silicate.

18. A composite according to claim 15, wherein the polymer comprises a thermoplastic engineering polymer.

19. A composite according to claim 15, wherein the polymer comprises a thermoplastic elastomer.

20. A composite according to claim 15, wherein the polymer comprises a thermoset polymer.

21. A composite composition comprising a thermoplastic engineering polymer and a mesoporous silicate, wherein the mass ratio of polymer to silicate is between about 99:

1 and about 50;

50, and wherein the mesoporous silicate has a surface area of at least 400 meters square per gram, an average mesopore diameter of at least 4 nanometers, and a pore volume of at least 1.0 cubic centimeters per gram, wherein at least 20% of the total pore volume is due to the presence of mesopores 2 to 50 nm in size, wherein the mesoporous silicate comprises a disordered surfactant-templated mesoporous silicate.

22. A composite according to claim 21, wherein the surface area is from 400 to 1500 m²/g, the pore diameter is from 4 to 50 nm, and the pore volume is from 1 to 3.5 cm³/g.

23. A composite according to claim 21, comprising 0.1-12% by weight of the mesoporous silicate.

24. A composite according to claim 21, wherein the polymer comprises a thermoplastic engineering polymer.

25. A composite according to claim 21, wherein the polymer comprises a thermoplastic elastomer.

26. A composite according to claim 21, wherein the polymer comprises a thermoset polymer.

27. A composite composition comprising a thermoplastic engineering polymer and a mesoporous silicate, wherein the mass ratio of polymer to silicate is between about 99:

1 and about 50;

50, and wherein the mesoporous silicate has a surface area of at least 400 meters square per gram, an average mesopore diameter of at least 2 nanometers, and a pore volume of at least 1.0 cubic, centimeters per gram, wherein at least 20% of the total pore volume is due to the presence of mesopores 2 to 50 nm in size, wherein the mesoporous silicate comprises a mesoporous layered silicate clay.

28. A composite according to claim 27, wherein the surface area is from 400 to 1500 m²/g, the pore diameter is from 4 to 50 nm, and the pore volume is from 1 to 3.5 cm³/g.

29. A composite according to claim 27, comprising 0.1-12% by weight of the mesoporous layered silicate clay.

30. A composite according to claim 27, wherein the polymer comprises a thermoplastic engineering polymer.

31. A composite according to claim 27, wherein the polymer comprises a thermoplastic elastomer.

32. A composite according to claim 27, wherein the polymer comprises a thermoset polymer.

33-78. -78. (canceled)