Nanotechnology thiab Nanomaterials: Nanometer Titanium Dioxide hauv Sunscetics
Tso lus lus
Txog 5% ntawm cov rays ci los ntawm lub hnub muaj ultraviolet rays nrog nthwv dej ≤400 NM. Ultraviolet Rays nyob rau hauv lub hnub ci tuaj yeem muab faib ua: Ntev-yoj ultraviolet rays nrog lub wavelengd ntawm 320, hu ua a-hom ultraviolet rays (UVA); Nruab Nrab-yoj ultraviolet rays nrog nthwv dej ntawm 290 nm hu ua b-hom ultraviolet rays nrog 290 nm yog hu ua C-hom Ultraviolet Rays.
Vim nws lub suab luv wavelength thiab siab zog, uas muaj zog ua kom puas tsuaj, ua rau cov neeg puas tsuaj loj, ua rau mob qog nqaij tawv. UVB yog qhov tseem ceeb ua rau cov nqaij tawv nqaij thiab tshav kub tshav ntuj.
1. Lub hauv paus ntsiab lus ntawm Shielding Ultraviolet Rays nrog NANO TIO2
TiO _ 2 yog n-hom semiconductor. Lub Crystal Crystal ntawm Nano-TIO _ 2 siv nyob rau hauv ValnScetics tsawg dua 400nm irbidiate tio _ 2, cov hluav taws xob ntawm kev sib tw band tuaj yeem nqus UV rays thiab zoo siab rau Lub conduction band, thiab electron-lub qhov ua khub yog tsim nyob rau tib lub sijhawm, yog li tio _ 2 muaj cov haujlwm ntawm kev nqus UV Rays. Nrog rau cov me me qhov loj me thiab ntau cov feem, qhov no zoo heev nce qhov tshwm sim ntawm kev thaiv lossis cuam tshuam cov roj tsawv ultraviolet.
2. Cov yam ntxwv ntawm Nano-TiO2 hauv Sunscenics
2.1
Siab UV Tiv Thaiv Kev Ua Haujlwm
Ultraviolet tiv thaiv muaj peev xwm ntawm Sunscetics yog qhia los ntawm Lub Hnub Tiv Thaiv Kev Tiv Thaiv (SPF tus nqi), thiab ntau dua SPF tus nqi, qhov zoo dua cov txiaj ntsig tiv thaiv tshav ntuj. Qhov sib piv ntawm lub zog uas yuav tsum tau los tsim cov ntawv qis tshaj plaws uas yog cov tawv nqaij uas yuav tsum tau ua kom cov tawv nqaij ua rau daim tawv nqaij tsis muaj tawv nqaij.
Raws li nano-tio2 nqus thiab scatters ultraviolet rays, nws yog hais tias yog qhov zoo tshaj plaws lub cev tiv thaiv lub tsev thiab txawv teb chaws. Feem ntau, muaj peev xwm ntawm nano-tio2 rau Shield UVB yog 3-4 zaug ntawm nano-zno.
2.2
Tsim nyog qhov loj me me
Ultraviolet tiv thaiv muaj peev xwm ntawm Nano-TiO2 yog txiav txim siab los ntawm nws lub peev xwm nqus tau thiab tawg khoom. Tus me dua thawj qhov me me ntawm nano-tio2, qhov muaj zog ulaviolet kev nqus lub peev xwm. Raws li Rayleigh txoj cai ntawm lub teeb tawg, muaj qhov kev pom zoo thawj zaug rau cov nano-tio2 rau ultraviolet rays nrog wavelengthpeps. Kev sim kuj qhia tau tias ntev dua ntawm ultraviolet rays, lub peev xwm thaiv ntawm nano-tio 2 nyob ntawm nws lub peev xwm tawg; Tus luv luv lub wavelength, qhov ntau nws kev thaiv yog nyob ntawm nws lub peev xwm nqus tau.
2.3
Zoo heev Dispersibility thiab Transparency
Thawj qhov me me ntawm nano-tio2 yog qis dua 100 nm, deb tsawg dua lub wavelength ntawm pom lub teeb. Theoretically, nano-tio2 tuaj yeem xa lub teeb pom thaum nws ua tiav, yog li nws yog pob tshab. Vim hais tias ntawm pob tshab ntawm nano-tio2, nws yuav tsis npog daim tawv nqaij thaum ntxiv rau hauv Sunscetics. Yog li ntawd, nws tuaj yeem qhia cov kev zoo nkauj rau kev zoo nkauj. Ib qho ntawm cov ntsiab tseem ceeb ntawm nano-tio2 hauv Sunscenics. Qhov tseeb, Nano-TIO 2 yog pob tshab tab sis tsis yooj yim rau cov pob tshuaj pleev xim rau Sunmetics, thiab nws yooj yim rau cov kev sib koom tes, yog li cuam tshuam rau qhov tsis sib xws thiab pob tshab ntawm Cov khoom lag luam.
2.4
Cov huab cua zoo tsis kam
Nano-tio 2 rau Sunscenics Tshuaj pleev ib ce yuav tsum muaj cov huab cua tiv (tshwj xeeb yog lub teeb kom tiv taus). Vim tias nano-tio2 muaj cov khoom me me thiab cov khub hluav taws xob ntau ntxiv, thiab qee qhov hluav taws xob rov qab mus rau saum npoo av, thiab hluav taws xob radicals nyob rau hauv cov dej ntws tawm ntawm lub npoo ntawm Nano-tio2, uas muaj cov peev xwm oxidation muaj zog.Nws yuav ua rau tsis txaus siab ntawm cov khoom lag luam thiab tsw vim kev txiav txim siab ntawm cov txuj lom. Yog li ntawd, ib lossis ntau dua pob ntseg sib xyaw ua ke txheej, alumina thiab zirmonia, yuav tsum tau coconia, yuav tsum tau cocon-tio2 kom inhibit nws cov yees duab yees duab.
3. Hom thiab Kev Loj Hlob ntawm Nano-Tio2
3.1
Nano-tio2 hmoov
Nano-Ti2 cov khoom muag tau muag nyob rau hauv daim ntawv ntawm cov hmoov tawv, uas tuaj yeem faib ua hydrophilic hmoov raws cov khoom ntiag tug ntawm nano-tio2. Hydrophilic hmoov yog siv nyob rau hauv cov tshuaj pleev ib ce dej ua ke, thaum cov nqaij npua teb lipophilic yog siv hauv cov tshuaj pleev ib ce roj. Hydrophilic hmoov feem ntau tau txais los ntawm inorganic nto kev kho.MOS ntawm cov hmoov txawv teb chaws nano-tio2 hmoov tshwj xeeb nto kev kho mob tshwj xeeb raws li lawv daim ntawv thov.
3.2
Daim tawv Xim Nano Tio2
Vim tias nano-tio2 hais tau zoo thiab yooj yim rau scatter xiav lub teeb pom kev zoo, thaum ntxiv rau cov tawv nqaij tsom iav, ntawm daim tawv nqaij yuav qhia cov suab xiav thiab zoo li tsis muaj tseeb. Txhawm rau kom phim cov xim tawv nqaij, cov xim liab xws li cov hlau oxide feem ntau yog txuas ntxiv rau cov qauv kom zoo nkauj hauv cov theem thaum ntxov. Txawm li cas los xij, vim qhov sib txawv hauv qhov sib txawv thiab wettity ntawm nano-tio2 _ 2 thiab hlau oxide, ntab cov xim feem ntau tshwm sim.
4. Ntau lawm cov xwm txheej ntawm nano-tio2 hauv Suav teb
Kev tshawb fawb me me ntawm Nano-Tio2 _ 2 nyob rau hauv Suav teb yog nquag, thiab ntau qhov kev tshawb fawb ua tsis tau hloov mus rau cov khoom lag luam. Kev lag luam ntau lawm ntawm nano-tio2 hauv Suav teb pib xyoo 1997, ntau dua 10 xyoo tom qab ntawv Nyij Pooj.
Muaj ob qho laj thawj uas txwv qhov zoo thiab kev sib tw ua lag luam ntawm nano-tio2 cov khoom hauv Suav teb:
① Application Technology Cov Lus Taw Qhia Lag Luam Qab
Daim ntawv thov kev tshawb fawb thev naus laus zis yuav tsum tau los daws cov teeb meem ntawm kev ntxiv cov txheej txheem thiab cov txiaj ntsig nyhuv tshuaj ntawm nano-tio2 hauv kev sib xyaw. Daim ntawv thov kev tshawb fawb ntawm Nano-TiO2 hauv ntau cov teb tsis tau tsim, thiab kev tshawb fawb hauv kev tshawb fawb kom tob dua, Tuam Tshoj lub nano-tio2 _ 2 yam khoom Tsis tuaj yeem tsim cov cim serial kom tau raws li cov kev cai tshwj xeeb ntawm cov teb sib txawv.
② Cov thev naus laus zis saum npoo ntawm Nano-TiO2 xav tau kev kawm ntxiv
Kev kho deg suav nrog kev kho mob hauv cov organic saum npoo av. Cov kev kho hauv cov tshuab yog tsim ntawm cov neeg saib xyuas kev kho mob, kev kho kom thaj av thiab cov khoom siv kho kom zoo.
5. Xaus lus
Cov pob tshab, ultraviolet kev tiv thaiv kev ua tau zoo, dispersibility thiab lub teeb tiv taus yog qhov tseem ceeb ntawm cov txheej txheem nano-tio2 yog tus yuam sij los txiav txim cov ntsuas kev ntsuas no.
Lub sij hawm ncua: Jul-04-2022