Explosive microporous coordination polymers
View Patent ↗Employing non-energetic MCPs as hosts (fuel) for the adsorption of oxidant molecules enables the intimate and molecular scale mixing of fuel and oxidizer on a level that is not commonly achievable in traditional energetic mixtures. The adsorption of the oxidants into MOF-5 resulted in increased heat released upon decomposition, which shows potential for utilization of this method as a platform to develop high-performance primary energetic materials.
1. An energetic composition comprising:
a first component comprising a nanostructured sorbent being a crystalline porous coordination polymer consisting of at least one metal node or cluster which is coordinated to an organic linker forming at least one porous framework; and
a second component comprising an oxidant infiltrated into pores of the at least one porous framework of the nanostructured sorbent,
wherein the second component is present in an amount such that the oxidant is at least 10% of the weight of the energetic composition;
a combination of the nanostructured sorbent and the oxidant resulting in the energetic composition material which is more sensitive to detonation by impact, friction, spark, or thermal stimulus than the oxidant alone.
2. The composition according to claim 1 where the ratio of oxidant to nanostructured sorbent is such that the value of the oxygen balance of the composition is closer to zero than the value of the oxygen balance of either of the components.
3. The composition according to claim 2 where the oxygen balance is less than 35% and more than −35%.
4. The composition according to claim 2 where the oxygen balance is less than 10% and more than −10%.
5. The composition according to claim 1 where the energetic composition has an impact sensitivity that is greater than that of pentaerythritol tetranitrate (PETN).
6. The composition according to claim 1 where the oxidizer is a liquid.
7. The composition according to claim 1 where the oxidizer is a solid.
8. The system according to claim 1 wherein said oxidant comprises tetranitromethane or hexanitroethane.
9. A method for producing the composition according to claim 1 comprising infiltrating the oxidant into pores of the porous network by diffusion in the vapor phase.
10. A method for producing the composition according to claim 1 comprising infiltrating the oxidant into pores of the porous network by melt infiltration.
11. A method for producing the composition according to claim 1 comprising infiltrating the oxidant into pores of the porous network by solution infiltration.
12. The composition according to claim 1 wherein the adsorption of oxidant into the nanostructured sorbent results in the energetic composition, which displays greater heat released upon decomposition than would be expected for decomposition of an equivalent quantity of the pure components.
13. The composition according to claim 1 wherein said organic linker is any carboxylate based organic molecule.
14. The composition according to claim 1 wherein said organic linker is any nitrogen-containing molecule.
15. The composition according to claim 1 wherein the at least one porous framework is a zeolitic imidazolate framework.