Methods and systems for delivering wood preservatives
View Patent ↗The present application relates to wood preservation, for example, surfactants and phospholipids for improving wood preservation. Included are surfactants and phospholipids containing a 2-amino-N,N-dimethylacetamide. Provided are wood preservative compositions containing these surfactants or phospholipids, methods of applying such wood preservative compositions to wood, and wood products resultant from some such methods. Also provided are wood products containing the wood preservative compositions provided herein.
1. A wood preservative composition comprising:
a micelle or liposome, wherein the micelle or liposome comprises at least one surfactant that comprises a 2-amino-N,N-dimethylacetamide (DMAc) moiety; and
at least one wood preservative compound contained within the micelle or liposome; and
at least one lithium salt.
2. The wood preservative composition of claim 1 , wherein the wood preservative composition is in aqueous dispersion form.
3. The wood preservative composition of claim 2 , wherein the concentration of the wood preservative composition in the aqueous dispersion is about 0.1 μM to about 10 mM.
4. The wood preservative composition of claim 1 , wherein the at least one lithium salt is selected from LiF, LiCl, LiBr, LiI, LiOH, Li 2 CO 3 , LiHCO 3 , Li 2 NO 3 , LiSO 4 , LiHSO 4 , Li 3 PO 4 , Li 2 HPO 4 and LiH 2 PO 4 .
5. The wood preservative composition of claim 1 , wherein the lithium salt is lithium chloride.
6. The wood preservative composition of claim 1 , wherein the total amount of lithium salt present in the composition is about 0.1 μM to about 10 mM.
7. The wood preservative composition of claim 1 , wherein the micelle or liposome further comprises at least one surfactant that does not contain a DMAc moiety.
8. The wood preservative composition of claim 1 , wherein the wood preservative composition comprises micelles.
9. The wood preservative composition of claim 8 , wherein the micelles have a mean diameter of about 10 nm to about 50 nm.
10. The wood preservative composition of claim 8 , wherein the wood preservative compound is lipid, surfactant or soap soluble.
11. The wood preservative composition of claim 10 , wherein the wood preservative compound is sodium dodecyl sulfate, sodium laureth sulfate, cetylpyridinium chloride, polyethoxylated tallow amine, cetyl alcohol, stearyl alcohol or combinations thereof.
12. The wood preservative composition of claim 1 , wherein the wood preservative composition comprises unilamellar liposomes.
13. The wood preservative composition of claim 12 , wherein the unilamellar liposomes have a mean diameter of about 30 nm to about 60 nm.
14. The wood preservative composition of claim 10 , wherein the wood preservative compound is water soluble.
15. The wood preservative composition of claim 14 , wherein the wood preservative compound is phosphatidylcholines, phosphatidylethanolamine, cholesterol, phosphatidylserine, phosphatidylinositol, or combinations thereof.
16. The wood preservative composition of claim 1 , wherein the surfactant that comprises a DMAc moiety further comprises a C 8-50 alkyl moiety.
17. The wood preservative composition of claim 1 , wherein the surfactant that comprises a DMAc moiety further comprises a phosphatidyl serine moiety.
18. The wood preservative composition of claim 1 , wherein the surfactant that comprises a DMAc moiety is stearoyl-2-amino-N,N-dimethylacetamide, lauroyl-2-amino-N,N-dimethylacetamide, or a combination thereof.
19. The wood preservative composition of claim 1 , wherein the amount of surfactant containing a DMAc moiety in the micelle or liposome is about 1% to about 95% (w/w) relative to the total amount of surfactant in the micelle or liposome.
20. The wood preservative composition of claim 1 , wherein the amount of wood preservative compound contained in the wood preservative composition is about 70% to about 99% (w/w) relative to the total amount of the wood preservative composition.
21. A wood preservative composition comprising:
at least one surfactant that comprises a 2-amino-N,N-dimethylacetamide (DMAc) moiety;
at least one wood preservative compound;
an aqueous solvent; and
at least one lithium salt.
22. A preserved wood product comprising a wood product and the wood preservative composition of claim 1 .
23. A method of preserving wood, the method comprising:
providing untreated wood; and
applying to the untreated wood the wood preservative composition of claim 1 .