Dehumidifying deoxidizer
A dehumidifying deoxidizer containing oxygen-deficient cerium oxide and a dehumidifier is provided. The oxygen-deficient cerium oxide is preferably doped with an element increasing the oxygen absorption of the cerium oxide. The oxygen absorption sites of the cerium oxide are preferably obstructed by a site obstructing factor. The cerium oxide preferably has a fluorite type superlattice structure. Also provided are a dehumidifying and deoxidizing packet having the dehumidifying deoxidizer sealed in a bag-shaped, gas permeable casing and a dehumidifying and deoxidizing resin composition containing the dehumidifying deoxidizer and a gas permeable resin.
1. A dehumidifying deoxidizer comprising:
oxygen-deficient cerium oxide having a fluorite superlattice structure; and
a dehumidifier,
wherein the dehumidifier is composed of an inorganic material in a form of a powder having an average particle size of from 0.1 μm to 1 mm.
2. The dehumidifying deoxidizer according to claim 1 , wherein the oxygen-deficient cerium oxide is doped with a dopant element which increases the oxygen absorption of the cerium oxide.
3. The dehumidifying deoxidizer according to claim 1 , wherein a proportion of the dehumidifier is 1% to 50%, based upon a total weight of the cerium oxide and the dehumidifier.
4. The dehumidifying deoxidizer according to claim 1 , wherein a proportion of the dehumidifier is 15% to 40%, based upon a total weight of the cerium oxide and the dehumidifier.
5. The dehumidifying deoxidizer according to claim 1 , wherein the cerium oxide and the dehumidifier have an average particle size of 0.1 μm to 100 μm and 0.1 μm to 1 mm, respectively.
6. The dehumidifying deoxidizer according to claim 1 , wherein the inorganic dehumidifier is selected from the group consisting of naturally occurring zeolite, mordenite, clinoptilolite, erionite, synthetic zeolite, molecular sieve, clay minerals, bentonite, montmorillonite, silica gel, alumina, calcium oxide, and hygroscopic salts.
7. A dehumidifying and deoxidizing packet comprising a bag-shaped, gas permeable casing and the dehumidifying deoxidizer according to claim 1 sealed in the casing.
8. A dehumidifying and deoxidizing resin composition comprising the dehumidifying deoxidizer according to claim 1 and a gas permeable resin.
9. The dehumidifying and deoxidizing resin composition according to claim 8 , which has the form of a pellet, film or a tray.
10. A dehumidifying and deoxidizing laminate film comprising a dehumidifying and deoxidizing layer having the dehumidifying and deoxidizing resin composition according to claim 8 , a gas barrier layer which has gas barrier properties and is superposed on one side of the dehumidifying and deoxidizing layer, and a gas permeable layer which has gas permeability and is superposed on the other side of the dehumidifying and deoxidizing layer.
11. The dehumidifying and deoxidizing laminate film according to claim 10 , further comprising a buffer layer having a buffering action against a physical impact between the dehumidifying and deoxidizing layer and the gas barrier layer, and a high gas barrier layer on the outer side of the gas barrier layer, the high gas barrier layer having higher ability to block the penetration of oxygen and moisture than the gas barrier layer.
12. A dehumidifying deoxidizer comprising:
oxygen-deficient cerium oxide; and
a dehumidifier,
wherein the oxygen-deficient cerium oxide has an oxygen absorption site caused by the oxygen vacancy, the oxygen absorption site being releasably obstructed by a site obstructing factor.
13. The dehumidifying deoxidizer according to claim 12 , wherein the oxygen-deficient cerium oxide is doped with a dopant element which increases the oxygen absorption of the cerium oxide.
14. The dehumidifying deoxidizer according to claim 12 , wherein the oxygen-deficient cerium oxide has a fluorite superlattice structure.
15. A dehumidifying and deoxidizing packet comprising a bag-shaped, gas permeable casing and the dehumidifying deoxidizer according to claim 12 sealed in the casing.
16. A dehumidifying and deoxidizing resin composition comprising the dehumidifying deoxidizer according to claim 12 and a gas permeable resin.
17. The dehumidifying and deoxidizing resin composition according to claim 16 , which has the form of a pellet, film or a tray.
18. A dehumidifying and deoxidizing laminate film comprising a dehumidifying and deoxidizing layer having the dehumidifying and deoxidizing resin composition according to claim 16 , a gas barrier layer which has gas barrier properties and is superposed on one side of the dehumidifying and deoxidizing layer, and a gas permeable layer which has gas permeability and is superposed on the other side of the dehumidifying and deoxidizing layer.
19. The dehumidifying and deoxidizing laminate film according to claim 18 , further comprising a buffer layer having a buffering action against a physical impact between the dehumidifying and deoxidizing layer and the gas barrier layer, and a high gas barrier layer on the outer side of the gas barrier layer, the high gas barrier layer having higher ability to block the penetration of oxygen and moisture than the gas barrier layer.