Cov pa oxygen absorbents yog cov tshuaj lom neeg uas ua rau txo qis oxygen concentration hauv cov cheeb tsam uas nyob ib puag ncig, thiab lawv muaj cov ntawv thov tseem ceeb hauv kev khaws zaub mov, chaw muag tshuaj, thiab kev tiv thaiv kab lis kev cai. Ntau hom pa oxygen absorbents sib txawv hauv kev muaj pes tsawg leeg, cov tshuaj tiv thaiv mechanism, ib puag ncig siv tau, thiab kev ua tau zoo. Kev nkag siab txog qhov sib txawv no pab xaiv cov khoom tsim nyog raws li qhov xav tau tiag tiag.
Qhov sib txawv ntawm cov tshuaj muaj pes tsawg leeg thiab cov tshuaj tiv thaiv txheej txheem
Cov pa oxygen absorbents feem ntau tau muab faib ua ntau pawg, suav nrog cov hlau -raws li, sulfite-raws li, organic, thiab hom photosensitive. Hlau- cov pa oxygen absorbents feem ntau yog. Lawv haus cov pa oxygen los ntawm cov tshuaj tiv thaiv oxidation ntawm hlau hmoov thiab oxygen (4Fe + 3O₂ → 2Fe₂O₃). Cov tshuaj tiv thaiv yog ceev thiab ua tau zoo, haum rau feem ntau ambient kub ib puag ncig. Nws qhov tsis zoo yog tias nws nyob ntawm cov av noo thiab feem ntau yuav tsum tau siv ua ke nrog lub desiccant.
Sulfite-raws li absorbents (xws li sodium metabisulfite) ua ke nrog oxygen los ntawm cov tshuaj tiv thaiv los tsim sulfates. Lawv haum rau ib puag ncig rhiab rau hlau corrosion, tab sis lawv cov tshuaj tiv thaiv kev ua tau zoo yog qis dua hlau -raws li absorbents, thiab lawv tuaj yeem tso cov tshuaj sulfur dioxide ntau npaum li cas, yuav tsum tau tswj cov tshuaj.
Organic oxygen absorbents (xws li vitamin C thiab enzyme npaj) muaj cov tshuaj tiv thaiv me me thiab tsim nyog rau cov zaub mov, tshwj xeeb tshaj yog cov khoom lag luam rhiab heev, tab sis lawv kim dua thiab muaj peev xwm nqus tau tsawg. Photosensitive absorbents cia siab rau lub teeb kom ua rau cov tshuaj tiv thaiv thiab feem ntau yog siv rau hauv cov xwm txheej tshwj xeeb, xws li khaws cia cov khoom pov thawj hauv tsev cia puav pheej.
Qhov sib txawv ntawm Kev Siv Ib puag ncig thiab kev ua tau zoo
Hlau -raws li absorbents ua tau zoo tshaj plaws nyob rau hauv ib txwm kub thiab av noo tej yam kev mob thiab yog dav siv nyob rau hauv lub tshuab nqus tsev ntim khoom noj, xws li kas fes thiab txiv ntseej. Sulfite-raws li absorbents yog tsim nyog rau kev ntim tshuaj los yog precision ntsuas vim lawv qis corrosiveness rau hlau qhov chaw. Organic absorbents feem ntau yog siv rau hauv cov chaw muag tshuaj, cov khoom noj qab haus huv, thiab cov khoom noj siab - kawg vim lawv muaj kev nyab xeeb siab.
Tsis tas li ntawd, sib txawv absorbents muaj cov tshuaj tiv thaiv sib txawv thiab muaj peev xwm. Hlau -raws li absorbents feem ntau nqus tau ntau pua zaus lawv tus kheej qhov hnyav hauv oxygen, thaum sulfite-raws li thiab cov organic absorbents muaj peev xwm nqus tau qis dua. Yog li ntawd, hlau -raws li absorbents yog ntau txhim khu kev qha nyob rau hauv daim ntawv thov uas yuav tsum tau ntev -lub sij hawm oxygen- ib puag ncig dawb.
Cov ntsiab lus
Kev xaiv cov pa oxygen absorbents yuav tsum tau xav txog txhua yam ntawm ib puag ncig, lub hom phiaj oxygen concentration, thiab cov khoom siv sib xws. Hlau-raws li absorbents tau dhau los ua qhov tseem ceeb vim lawv cov kev ua haujlwm siab thiab kev lag luam, thaum sulfite-raws li thiab cov organic absorbents muaj qhov zoo hauv cov haujlwm tshwj xeeb. Xaiv qhov zoo oxygen absorbent tuaj yeem ua kom ntev lub neej txee ntawm cov khoom thiab txo oxidation poob.
