Cov teebmeem ntawm ultraviolet rau cov khoom
Nyob rau hauv ib puag ncig ntuj, ultraviolet (UV) hluav taws xob los ntawm lub hnub ci yog qhov tseem ceeb ua rau photodegradation thiab photoaging hauv cov khoom. Qhov hluav taws xob pom tsis tau tsuas yog cuam tshuam rau tib neeg kev noj qab haus huv tab sis kuj ua rau muaj kev puas tsuaj loj rau cov khoom. Thaum lub sij hawm ua, cia, thiab siv tiag tiag, cov khoom los yog lawv cov ntaub ntawv yog feem ntau raug rau ntau yam sab nraud tej yam kev mob xws li lub teeb, tshav kub, oxygen, mechanical kev nyuaj siab, ozone, teeb meem hlau ions, thiab hluav taws xob, uas induce lub sab hauv lub cev los yog tshuaj hloov, thaum kawg ua rau poob ntawm lawv cov qub kev ua tau zoo. BOTO, raws li lub chaw tsim khoom ntawm kev ntseeg siab ib puag ncig cov cuab yeej kuaj, muab siab heevUV aging test chamberthiab lwm yam khoom siv tshuaj ntsuam xyuas kev yees duab los pab cov tuam txhab soj ntsuam cov khoom siv tau zoo nyob rau hauv ntau yam kev mob ib puag ncig thiab xyuas kom meej tias lawv cov khoom ua tau raws li cov qauv kev lag luam.
Cov teebmeem tshwj xeeb ntawm lub hnub ci ntawm cov khoom
Cov hluav taws xob ultraviolet (UV) tuaj yeem ua rau ntau hom khoom degradation, xws li fading, poob ntawm luster, nto chalking, tawg, tawg, plooj, blistering, brittleness, tsis muaj zog, thiab oxidation. Cov teeb meem no tsis tsuas yog cuam tshuam rau cov tsos thiab kev ua tau zoo ntawm cov khoom, tab sis kuj tseem tuaj yeem ua rau lawv lub neej luv, yog li ua kom cov nqi kho thiab hloov pauv.
1. Kev Ntsuas UV: Simulating Ultraviolet Band ntawm Hnub Ci
Kev kuaj UV, tseem hu ua ultraviolet aging testing, yog ib txoj hauv kev uas siv cov khoom siv teeb pom kev zoo los simulate ultraviolet band ntawm tshav ntuj. Nws yog tsuas yog siv los ntsuas qhov tsis kam ntawm cov ntaub ntawv polymer xws li cov organic coatings, plastics, thiab roj hmab rau ib puag ncig kev laus. BOTO's UV aging test chambers tuaj yeem simulate lub teeb pom kev zoo thiab pab kwv yees qhov kev ua tau zoo ntawm cov khoom hauv qhov tiag - ntiaj teb kev siv ib puag ncig los ntawm kev ntsuas kev laus sai.
2. Cov theem ntawm kev kuaj kev laus UV
UV aging test feem ntau suav nrog peb theem: illumination, condensation, thiab txau. Lub illumination theem simulates qhov kub thiab txias tej yam kev mob nyob rau hauv lub ntuj nruab hnub, xav txog cov khoom qhov kev ua tau zoo nyob rau hauv txawv kev siv ib puag ncig; lub condensation theem simulates condensation ntawm tus qauv nto thaum hmo ntuj; thiab theem txau simulates los nag los ntawm kev txau dej. Kev hloov pauv ntawm peb theem tuaj yeem tsim cov xyoo ntawm kev laus kev puas tsuaj nyob rau hauv tej yam ntuj tso nyob rau hauv ib tug luv luv lub sij hawm.
3. Hom kev laus
Cov khoom laus yog cov txheej txheem physicochemical complex, feem ntau tshwm sim xws li: fading (denaturation ntawm cov organic dyes), lub zog txo (polymer chains), cracking (combined kev txiav txim ntawm polymer breakage thiab kev ntxhov siab), chalking (reorganization tom qab polymer breakage), thiab txheej txheej (kev tawg ntawm hydrogen bonds ntawm txheej thiab substrate). Cov xwm txheej no ua rau cov khoom siv ua haujlwm tsis zoo thiab cuam tshuam rau nws lub neej kev pab cuam.
4. Hom UV Laus Teeb
Raws li qhov sib txawv spectral distributions, fluorescent ultraviolet teeb feem ntau muab faib ua UVA thiab UVB hom. Nyob rau hauv UVA teeb, lub teeb lub zog nrog wavelengths qis dua 300nm tso nyiaj tsawg dua 2% ntawm tag nrho cov zis lub teeb; thaum nyob rau hauv UVB teeb, qhov kev faib ua feem ntau tshaj 10%. Ob hom teeb no simulate ultraviolet tej yam kev mob nyob rau hauv ib puag ncig sib txawv thiab ua lub luag haujlwm tseem ceeb hauv kev soj ntsuam kev laus ntawm cov khoom.
5. Feem ntau siv UV laus teeb
Tam sim no, feem ntau siv ultraviolet aging teeb muaj xws li UVA-340, UVA-351, thiab UVB-313. UVA-340 yog qhov tsim nyog rau kev sim cov khoom siv sab nraum zoov, simulating ultraviolet rays nyob rau hauv tshav ntuj; UVA-351 yog siv los kuaj cov khoom siv sab hauv tsev, simulating ultraviolet rays los ntawm lub hnub ci dhau los ntawm iav; UVB-313 feem ntau yog siv rau kev ntsuas nrawm, haum rau kev kuaj kev laus sai ntawm cov ntaub ntawv ruaj khov.
6. Irradiance ntawm UVA-340
Lub teeb UVA-340 tuaj yeem simulate qhov sib txawv ntawm lub hnub ci los ntawm kev kho nws cov irradiance. Piv txwv li, 0.69 W / m² @ 340nm sib haum rau kev siv lub hnub ci thaum tav su hauv lub caij ntuj sov; 1.38 W / m² @ 340nm yog sib npaug rau lub hnub ci siab tshaj plaws; thiab 0.35 W / m² @ 340nm zoo ib yam li lub hnub ci nyob rau lub Peb Hlis lossis Lub Cuaj Hli, tsim nyog rau kev sim niaj hnub lossis kev sim ntsuas ultraviolet tsawg.
7. Cov qauv ntsuas UV
Tam sim no, muaj ntau tus qauv ntsig txog kev kuaj UV, feem ntau suav nrog ISO 4892.3, GB / T 16422.3, ASTM G 154, thiab ASTM D 4674. Kev xaiv cov qauv ntsuas tsim nyog yuav tsum ua raws li cov yam ntxwv tshwj xeeb ntawm cov khoom thiab cov neeg siv khoom xav tau los xyuas kom meej qhov tseeb thiab kev ntseeg siab ntawm cov txiaj ntsig kev xeem. Los ntawm kev ua raws li cov qauv no, kev ntsuam xyuas kev laus ntawm UV tuaj yeem ua rau ntawm cov khoom, yog li kev tshawb fawb kwv yees nws cov kev ua tau zoo hauv kev siv tiag tiag.
