Titanium Dioxide yog dab tsi?
Titanium dioxide yog cov ntxhia tshwm sim uas tau siv dav los ua cov xim dawb. Nws feem ntau pom muaj nyob rau hauv cov khoom xws li tshuaj pleev thaiv hnub, tshuaj pleev ib ce, xim, thiab yas vim nws qhov tshwj xeeb ci ci thiab opacity.
Hauv kev lag luam thiab kev siv tshuaj pleev ib ce, xim xim - qib titanium dioxide kuj hu uatitanium dawb, Pigment White 6 (PW6), lossis CI 77891. Nws yog suav hais tias yog cov xim dawb tshaj plaws thiab ci tshaj plaws tam sim no paub. Vim nws lub peev xwm zoo heev los nqus thiab tawg lub teeb, titanium dioxide muaj txiaj ntsig zoo ntawm kev txhim kho thiab ci xim.
Hauv cov khoom noj thiab tshuaj, titanium dioxide yog cais raws li cov khoom noj ntxivE171. Nws pab ua kom cov xim pom tseeb thiab pom tseeb dua thiab tuaj yeem tiv thaiv cov ntaub ntawv los ntawm kev puas tsuaj los ntawm lub teeb raug, xws li tawg lossis tawg.
Cov kev tshawb fawb pom tau tias cov neeg siv khoom muaj feem yuav yuav thiab haus cov khoom noj uas muaj xim zoo nkauj, ntxim nyiam dua. Titanium dioxide yog ib txoj hauv kev uas cov tuam txhab ua tiav cov txiaj ntsig no, uas yog vim li cas nws feem ntau pom nyob rau hauv cov khoom xws li khoom qab zib, kas fes creamers, ci khoom, ncuav mog qab zib decorations, thiab cov kua ntses dawb.
Titanium Dioxide ua li cas?
Titanium yog ib qho tshwm sim ntawm cov hlau uas muaj nyob hauv ib puag ncig. Thaum titanium raug oxygen nyob rau hauv cov huab cua, nws tsim titanium oxide, uas muaj nyob rau hauv ntau yam minerals, xuab zeb, av, thiab hmoov av.
Manufacturers extract titanium dioxide los ntawm cov zaub mov xws liilmenite, rutile, thiab anatase. Cov ntaub ntawv rho tawm tau ua tiav rau hauv cov hmoov zoo thiab ua kom zoo ntxiv kom ua tau raws li cov qauv kev nyab xeeb thiab kev coj dawb huv uas xav tau rau cov khoom noj, tshuaj, lossis kev siv lag luam.
Kev siv cov titanium dioxide
Titanium dioxide yog dav siv nyob rau hauv ob qho tib si kev lag luam thiab cov neeg siv khoom. Nws tuaj yeem:
- Ua kom daim ntawv tshwm dawb thiab ci dua
- Pab cov yas thiab roj hmab nyob twj ywm thiab ruaj khov
- Txo cov teeb meem emissions hauv automotive exhaust systems
Hauv kev lag luam kws tshuaj, titanium dioxide yog ib feem tseem ceeb ntawmntsiav tshuaj coatings thiab capsules, qhov twg nws pab tiv thaiv cov khoom xyaw nquag los ntawm kev puas tsuaj los ntawm lub teeb raug thiab txhim kho cov khoom ruaj khov.
Titanium Dioxide hauv Khoom Noj
Hauv cov khoom noj-txog kev siv, titanium dioxide yog siv ntau txoj hauv kev:
- Hauvntim khoom noj, los pab tiv thaiv cov khoom los ntawm tshav ntuj
- Txhawm rau inhibit cov kab mob loj hlob
- Txhawm rau rhuav tshem qee cov pa phem tso tawm los ntawm cov txiv hmab txiv ntoo thiab zaub, ua kom cov txheej txheem ripening qeeb thiab ua rau lub neej ntev.
Titanium dioxide kuj tseem tuaj yeem yogncaj qha ntxiv rau zaub mov, feem ntau raws li tus neeg saib xyuas xim. Tsis tas li ntawd, nws tuaj yeem ua haujlwm ua cov thickener thiab pab tiv thaiv cov khoom noj hmoov, xws li hmoov qab zib, los ntawm clumping.
Titanium dioxide feem ntau pom nyob rau hauv:
- Mis
- Kas fes creamers
- Zaub xam lav
- Khoom qab zib thiab khoom qab zib
- Chocolate
- Noj cov pos hniav
- Khoom noj txom ncauj
- Cov ntses
- Cov vitamins ntxiv
Yog tias koj xav paub seb puas muaj cov khoom noj muaj titanium dioxide, xyuas cov khoom xyaw. Txawm li cas los xij, US Food and Drug Administration (FDA) tsis xav kom cov tuam txhab sau npe los ntawm nws lub npe tshuaj. Hloov chaw, nws yuav tshwm sim raws li cov ntsiab lus dav dav xws li:
- Artificial xim
- Ntxiv cov xim xim
- Xim ntxiv
FDA tso cai rau qhov kev zam no rau ntau qhov kev pom zoo xim ntxiv.
Titanium Dioxide nyob rau hauv cov tshuaj pleev thaiv hnub thiab cov khoom kho tus kheej
Titanium dioxide kuj tau siv dav hauv cov khoom tu tus kheej, nrog rau cov tshuaj txhuam hniav thiab tshuaj pleev ib ce, qhov chaw uas nws ua haujlwm kom dawb, ci xim, thiab txhim kho opacity.
Nyob rau hauv cov tshuaj pleev thaiv hnub, titanium dioxide ua raws li ib tugLub cev UV lim, tsim ib qho kev tiv thaiv ntawm daim tawv nqaij uas muaj kev cuam tshuam thiab absorbs ultraviolet hluav taws xob. Rau lub hom phiaj no, nws tau ua tiav rau hauv ntau cov khoom me me hu uananoparticles.
Nyob rau hauv daim ntawv nanoparticle, titanium dioxide yuav luag pob tshab ntawm daim tawv nqaij thaum tseem muaj txiaj ntsig zoo ntawm thaiv UV rays, tiv thaiv lawv los ntawm kev nkag mus rau ntawm daim tawv nqaij.
Puas yog Titanium Dioxide Safe?
Cov koom haum tswj hwm thoob ntiaj teb tau soj ntsuam kev nyab xeeb ntawm titanium dioxide raws li cov pov thawj tshawb fawb muaj.
- CovUS FDAthiab ntau lwm tus tub ceev xwm txiav txim siab titanium dioxide muaj kev nyab xeeb rau kev siv hauv cov khoom noj thiab cov khoom tu tus kheej thaum siv nyob rau hauv kev txwv. FDA nruj me ntsis txwv nws cov concentration hauv cov zaub mov rautsis ntau tshaj 1%.
- Txawm li cas los xij, tsis yog txhua lub koom haum tswj hwm pom zoo. CovEuropean Commission txwv tsis pub siv titanium dioxide ua cov khoom noj ntxiv hauv 2022.
Qhov kev txiav txim siab no tau ua raws li 2021 lub tswv yim los ntawm European Food Safety Authority (EFSA), uas tau tshuaj xyuas cov ntaub ntawv muaj kev nyab xeeb thiab txiav txim siab tias nws tsis tuaj yeem txiav txim siab txog kev puas tsuaj DNA. Lub vaj huam sib luag kuj tau hais txog kev txhawj xeeb txog cov teebmeem carcinogenic, nco ntsoov tias thaum tsuas yog me me tuaj yeem nqus tau tom qab noj, kev noj txuas ntxiv tuaj yeem ua rau muaj cov khoom titanium dioxide hauv lub cev ntau dhau sijhawm.
Tseem muaj pov thawj tiasKev nqus pa ntawm cov titanium dioxide tuaj yeem tsim teeb meem, tshwj xeeb tshaj yog rau cov neeg ua haujlwm hauv kev tsim khoom lossis kev ua haujlwm ib puag ncig uas muaj plua plav tuaj yeem ua tau. Raws li qhov tshwm sim, US Occupational Safety and Health Administration (OSHA) tau tsim cov kev txwv tsis pub tshaj tawm uas cov tuam txhab lag luam yuav tsum ua raws.
Yog tias koj xav kom tsis txhob haus cov titanium dioxide, ua tib zoo nyeem cov ntawv qhia zaub mov thiab xaiv cov khoom noj tsawg kawg nkaus, tag nrho cov zaub mov thaum twg los tau.
Puas yog Titanium Dioxide ua rau mob qog noj ntshav?
Kev txhawj xeeb txog titanium dioxide thiab mob qog noj ntshav feem ntau nyob ntawmCov tshuaj siv li cas thiab qhov tshwm sim tshwm sim li cas.
Lub Koom Haum Thoob Ntiaj Teb rau Kev Tshawb Fawb Txog Kev Kho Mob (IARC) tau faib cov titanium dioxide li"tej zaum carcinogenic rau tib neeg", raws li kev tshawb fawb qhia txog qhov tshwm sim ntawm cov qog nqaij hlav hauv lub ntsws hauv cov nas uas raug titanium dioxide los ntawm kev nqus pa.
Qhov tseem ceeb, qhov kev faib tawm no feem ntau cuam tshuam nroginhalation raug, tsis raug kev noj haus.
Ntsiab Cai
Titanium dioxide yog cov ntxhia uas tshwm sim feem ntau siv hauv cov hmoov ua kom tawv nqaij thiab ci ntsa iab ntau yam khoom. Thaum nws tau raug txwv tsis pub ua zaub mov ntxiv hauv European Union, US FDA tswj hwm tias titanium dioxide muaj kev nyab xeeb rau kev siv khoom noj, tshuaj pleev ib ce, thiab tshuaj pleev thaiv hnub thaum siv nyob rau hauv kev txwv.