Cov tshuaj nqus UV, tseem hu ua cov lim dej UV lossis tshuaj pleev thaiv hnub, yog cov tshuaj siv los tiv thaiv ntau yam khoom siv los ntawm cov teebmeem phem ntawm ultraviolet (UV). Ib qho ntawm cov tshuaj nqus UV yog UV234, uas yog ib qho kev xaiv nrov rau kev tiv thaiv hluav taws xob UV. Hauv tsab xov xwm no peb yuav tshawb nrhiav ntau yam ntawm cov tshuaj nqus UV thiab nkag mus rau hauv cov yam ntxwv tshwj xeeb thiab kev siv ntawm UV234.

Cov tshuaj nqus UV muaj ntau yam khoom sib xyaw uas tsim los nqus thiab tshem tawm cov hluav taws xob UV. Cov tshuaj no feem ntau siv rau hauv cov khoom xws li tshuaj pleev thaiv hnub, yas, xim thiab ntaub kom tiv thaiv kev puas tsuaj thiab kev puas tsuaj los ntawm kev raug UV. Cov tshuaj nqus UV ua haujlwm los ntawm kev nqus cov hluav taws xob UV thiab hloov nws mus ua cua sov tsis muaj teeb meem, yog li tiv thaiv cov khoom siv los ntawm cov teebmeem tsis zoo ntawm cov hluav taws xob UV.

Cov tshuaj nqus UV raug muab faib ua ntau pawg raws li lawv cov qauv tshuaj lom neeg thiab hom kev ua haujlwm. Qee hom tshuaj nqus UV feem ntau suav nrog benzophenones, benzotriazoles, thiab triazines. Txhua hom tshuaj nqus UV muaj cov txiaj ntsig tshwj xeeb thiab tsim nyog rau ntau daim ntawv thov. Piv txwv li, UV234 yog benzotriazole UV absorber uas siv dav hauv ntau yam lag luam vim nws cov khoom tiv thaiv UV zoo heev.

UV234 paub txog nws txoj kev ua haujlwm zoo hauv kev nqus cov hluav taws xob ultraviolet, tshwj xeeb tshaj yog nyob rau hauv UVB thiab UVA ntau yam. Qhov no ua rau nws zoo tagnrho rau kev muab kev tiv thaiv hluav taws xob UV dav dav. UV234 feem ntau siv rau hauv cov tshuaj pleev thaiv hnub kom txhim kho cov khoom lub peev xwm tiv thaiv UV. Tsis tas li ntawd, nws yog siv rau hauv cov yas thiab cov txheej txheem los tiv thaiv kev puas tsuaj ntawm photodegradation thiab tswj kev ncaj ncees ntawm cov khoom thaum raug tshav ntuj.

Cov kev siv ntawmUV234tsis yog tsuas yog siv rau cov tshuaj pleev thaiv hnub thiab cov tshuaj pleev thaiv hnub xwb. Nws kuj tseem siv rau hauv kev lag luam textile los tiv thaiv UV rau cov ntaub thiab cov fibers. Los ntawm kev koom ua ke UV234 rau hauv cov ntaub, cov chaw tsim khoom tuaj yeem ua kom cov khoom siv ruaj khov thiab siv tau ntev dua, ua rau nws haum rau kev siv sab nraum zoov uas raug hluav taws xob UV tsis zam tau.

Ntxiv rau nws cov khoom siv uas nqus tau UV, UV234 kuj paub txog nws qhov kev ruaj khov ntawm photostable, uas ua kom nws tseem ua haujlwm tau zoo txawm tias raug tshav ntuj ntev. Cov khoom no yog qhov tseem ceeb rau kev tswj hwm kev ua haujlwm ntawm cov khoom uas muaj UV234, vim nws ua kom muaj kev tiv thaiv ntev tiv thaiv UV.

Thaum xav txog ntau yam khoom nqus UV, nws yog ib qho tseem ceeb kom nkag siab txog cov kev cai tshwj xeeb ntawm daim ntawv thov thiab qib kev tiv thaiv UV uas xav tau. Cov khoom nqus UV sib txawv muab ntau qib kev tiv thaiv UV thiab sib xws nrog cov ntaub ntawv sib txawv. Yog li ntawd, nws yog ib qho tseem ceeb kom xaiv cov khoom tsim nyogCov khoom nqus UVraws li kev siv thiab cov khoom tshwj xeeb ntawm cov khoom siv uas raug tiv thaiv.

Hauv kev xaus, cov khoom nqus UV ua lub luag haujlwm tseem ceeb hauv kev tiv thaiv cov ntaub ntawv los ntawm kev puas tsuaj ntawm UV hluav taws xob. UV234 yog benzotriazole UV absorber uas siv dav rau nws cov khoom tiv thaiv UV zoo heev thiab photostability. Kev nkag siab txog ntau yam ntawm UV absorbers thiab lawv cov khoom tshwj xeeb yog qhov tseem ceeb rau kev xaiv cov khoom nqus UV tsim nyog tshaj plaws rau ib daim ntawv thov tshwj xeeb. Txawm hais tias nyob rau hauv cov tshuaj pleev thaiv hnub, yas, coatings lossis textiles, UV absorbers xws li UV234 muab kev tiv thaiv txhim khu kev qha tiv thaiv UV hluav taws xob, pab ua kom lub neej ntev thiab kev ua tau zoo ntawm ntau yam khoom siv.