Cov qauv molecular ntawmUV absorbersfeem ntau muaj ob daim ntawv cog lus los yog cov nplhaib uas muaj ntxhiab, uas tuaj yeem nqus tau cov kab hluav taws xob ultraviolet ntawm cov wavelengths tshwj xeeb (feem ntau yog UVA thiab UVB).
Thaum ultraviolet rays irradiate lub absorbent molecules, cov electrons nyob rau hauv lub molecules hloov los ntawm lub hauv av xeev mus rau lub xeev siab, absorbing lub zog ntawm ultraviolet rays.
Tom qab nqus ultraviolet lub teeb, lub molecule yog nyob rau hauv ib qho kev zoo siab nrog lub zog siab. Yuav kom rov qab mus rau hauv av ruaj khov, cov molecules absorbent yuav tso tawm lub zog raws li hauv qab no:
① Tsis muaj hluav taws xob hloov pauv: hloov lub zog rau hauv lub zog hluav taws xob thiab tso tawm mus rau ib puag ncig ib puag ncig.
②Fluorescence los yog phosphorescence: ib feem ntawm lub zog yuav raug tso tawm nyob rau hauv daim ntawv ntawm pom lub teeb (tsis tshua muaj).
Los ntawm absorbing ultraviolet rays thiab hloov mus rau hauv tshav kub lub zog, UV absorbers txo qhov kev puas tsuaj ntawm ultraviolet rays rau cov ntaub ntawv (xws li plastics, coatings) los yog daim tawv nqaij.
Hauv cov khoom siv tshuaj pleev thaiv hnub, UV absorbers tuaj yeem tiv thaiv UV rays los ntawm kev nkag mus rau ntawm daim tawv nqaij thiab txo qhov kev pheej hmoo ntawm tshav kub kub, kev yees duab thiab mob qog noj ntshav.
Peb UV absorbers yog tsim rau polymers, coatings thiab tshuaj pleev ib ce. Yog tias koj xav tau cov khoom, thov koj xav tiv tauj peb, peb yuav teb tsis pub dhau 48 teev.
Post lub sij hawm: Feb-25-2025