Filter element for disc drive enclosure
A recirculation filter element for a disc drive enclosure. The filter element has a body having a surface area to volume ratio of at least 100/m and a self-assembled monolayer. The self-assembled monolayer may adsorb volatile contaminants from the enclosure or may have a chemical affinity to particulates, to accumulate and sequester particles on the body.
1. A recirculation filter element for a disc drive enclosure, the filter element comprising an adsorbent or absorbent structural body having a surface area to volume ratio of at least 100 m 2 /m 3 and a self-assembled monolayer to adsorb volatile contaminants on the body.
2. The filter element of claim 1 wherein the body comprises activated carbon, silica gel, an aerogel, activated alumina, zeolite, clinoptilolite, clay, iron oxide, magnesium percarbonate, or ion exchange resin.
3. The filter element of claim 2 wherein the body comprises a zeolite.
4. The filter element of claim 2 wherein the body comprises a plurality of particles molded to form the body.
5. The filter element of claim 4 wherein the body further comprises a resin binder.
6. The filter element of claim 1 wherein the self-assembled monolayer comprises reactive organo-silane or reactive mercapto compounds.
7. The filter element of claim 1 wherein the self-assembled monolayer comprises a terminal hydrocarbon, terminal ketone, terminal alcohol, terminal amine, or a terminal sulfur functional group.
8. The filter element of claim 7 wherein the self-assembled monolayer comprises a plurality of different terminal functional groups.
9. The filter element of claim 1 wherein the self-assembled monolayer comprises a fluorinated silane.
10. The filter element of claim 1 wherein the body has a surface area to volume ratio of at least 250 m 2 /m 3 .
11. The filter element of claim 1 wherein the self-assembled monolayer further accumulates and/or sequesters particles on the body.
12. The filter element of claim 1 wherein the self-assembled monolayer is oleophilic.
13. The filter element of claim 1 wherein the self-assembled monolayer comprises reactive organo-silane or reactive mercapto compounds.
14. A recirculation filter element for a disc drive enclosure, the filter element comprising an adsorbent or absorbent structural body having a surface area to volume ratio of at least 600 m 2 /m 3 and an oleophilic self-assembled monolayer.
15. The filter element of claim 14 wherein self-assembled monolayer comprises a plurality of terminal functional groups selected from the group consisting of hydrocarbon, ketone, alcohol, amine, and sulfur.
16. The filter element of claim 15 wherein the self-assembled monolayer has a chemical affinity to particulate.
17. The filter element of claim 14 wherein the self-assembled monolayer comprises a fluorinated silane, a reactive organo-silane or a reactive mercapto compound.
18. The filter element of claim 14 wherein the body comprises activated carbon, silica gel, an aerogel, activated alumina, zeolite, clinoptilolite, clay, iron oxide, magnesium percarbonate, or ion exchange resin.
19. A recirculation filter element for a disc drive enclosure, the filter element consisting of a structural body comprising an adsorbent or absorbent material and having a surface area to volume ratio of at least 100 m 2 /m 3 , and a self-assembled monolayer on the body, and optionally a fibrous enclosure around the structure body and the self-assembled monolayer.