Cov qauv molecular ntawmUV nqusFeem ntau muaj kev sib tw sib xyaw ua ke ob npaug lossis cov rings uas muaj ntxhiab, uas tuaj yeem nqus cov ulteriolet tshav ntawm cov wavelengthing (tsuas yog UVA thiab UVB).
Thaum ultraviolet rays rau iradiate molecules, cov tshuab hluav taws xob hauv cov molecules hloov los ntawm hauv av lub xeev mus rau lub xeev zoo siab, nqus lub zog ntawm cov hluav taws xob ultraviolet.
Tom qab nqus cov teeb ci ulaviolet, lub lwg me me nyob hauv lub xeev zoo siab nrog lub zog loj. Txhawm rau rov qab mus rau qhov chaw ruaj khov lub xeev, cov lwg me me yuav tso tawm lub zog hauv cov kev hauv qab no:
①non radiative hloov: Hloov ua hluav taws xob rau hauv lub zog tshav kub thiab muab tso rau hauv ib puag ncig ib puag ncig.
②fluorescence lossis phosphorescence: Ib feem ntawm lub zog yuav raug tso tawm rau hauv daim ntawv ntawm pom lub teeb (tsis tshua muaj).
Los ntawm kev nqus cov roj choj ultraviolet thiab hloov lawv mus rau hauv lub zog cua sov, UV tej kev puas tsuaj ntawm ultraviolet rays rau cov ntaub ntawv (xws li plastics, cov tawv nqaij) lossis tawv nqaij.
Hauv cov khoom tsom iav ua si, UV cov kev nqus tuaj yeem tiv thaiv UV cov duab los ntawm cov tawv nqaij thiab txo qhov kev pheej hmoo ntawm Sunburn, ua kom cov qog nqaij hlav.
Peb UV nqus yog qhov haum rau cov polymers, cov pleev tshuaj pleev thiab cov tshuaj pleev ib ce. Yog tias koj xav tau cov khoom lag luam, thov hu rau peb, peb yuav teb tsis pub dhau 48 teev.
Sijhawm Post: Feb-25-2025